ORDER NO. MTNC010524C1
B5
Service Manual
Color Television
Main Manual
(NA8ML)
Panasonic
Models
Chassis
CT-32SX31E
CT-32SX31UE
CT-32SX31CE
CT-36SX31E
CT-36SX31UE
CT-36SX31CE
BP371
BP371
BP371
BP372
BP372
BP372
This Service manual is issued as a service guide for the models of the NA8ML family listed above. Included in this
manual are a set of schematic, block diagrams, functional descriptions, alignment procedures, disassembly
procedures and a complete parts list.
“WARNING! This Service Manual is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians.Any attempt to
service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”
The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this Main Manual.
Copyright 2001 by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
and distribution is a violation of law.
®
Important Safety Notice . . . . . . . . . . . . . . . . . . 2
Instructional Flow Chart for
Serviceman Mode . . . . . . . . . . . . . . . . . . . 24
Safety Precautions . . . . . . . . . . . . . . . . . 2
General Guidelines. . . . . . . . . . . . . . . . . 2
Leakage Current Cold Check . . . . . . . . . 2
X-ray Radiation. . . . . . . . . . . . . . . . . . . . 2
Horizontal Oscillator
Service Adjustments
(Electronic Controls). . . . . . . . . . . . . . . . . 27
Sub-Contrast Adjustment . . . . . . . . . . . 27
Sub-Brightness (B02) . . . . . . . . . . . . . . 27
Tint/Color Adjustment . . . . . . . . . . . . . . 27
PIP Sub-Contrast Adjustment (P03). . . 28
Color Temperature Adjustment. . . . . . . 28
Complete Adjustment . . . . . . . . . . . . . . 28
Horizontal Centering (D00). . . . . . . . . . 29
E-W PCC Adjustment (D0C). . . . . . . . . 29
Corner PCC Adjustment (D0B). . . . . . . 29
H-Size Adjustment (D0D) . . . . . . . . . . . 29
V-Size and V-Position Adjustment
Disable Circuit Test . . . . . . . . . . . . . 2
Service Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Leadless Chip Component
(surface mount) . . . . . . . . . . . . . . . . 4
Component Removal . . . . . . . . . . . . . . . 4
Chip Component Installation . . . . . . . . . 4
How to Replace Flat-IC . . . . . . . . . . . . . 4
Horizontal Oscillator Disable Circuit . . . . 5
(D01 & D06) . . . . . . . . . . . . . . . . . . 29
V-Linearity Adjustment (D03) . . . . . . . . 29
V-Correction Adjustment (D02). . . . . . . 30
MTS Circuit Adjustments . . . . . . . . . . . 30
Input Level Adjustment (M00). . . . . . . . 30
Stereo Separation Adjustment
Receiver Feature Table . . . . . . . . . . . . . . . . . . . 6
(M01 & M02) . . . . . . . . . . . . . . . . . 30
Clock Adjustment (S07) . . . . . . . . . . . . 31
Service Adjustments
Location of Controls (Receiver). . . . . . . . . . . . 7
Quick Reference Control Operation . . . . 7
Quick Reference. . . . . . . . . . . . . . . . . . . 7
Control Operation . . . . . . . . . . . . . . . . . . 7
(Mechanical Controls) 31
Focus (part of T551) . . . . . . . . . . . . . . . 31
Location of Controls (Remote). . . . . . . . . . . . . 8
Audio Signal Path Block Diagram . . . . . . . . . 32
Video Signal Path Block Diagram . . . . . . . . . 33
IIC Connection . . . . . . . . . . . . . . . . . . . . . . . . . 34
Description of Connectors . . . . . . . . . . . . . . . 35
IC101 IN/OUT Pins and Functions (VCJ) . . . . 36
Component Identification . . . . . . . . . . . . . . . . 37
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Disassembly for Service. . . . . . . . . . . . . . . . . . 9
Back Cover. . . . . . . . . . . . . . . . . . . . . . . 9
A-Board - Main Chassis . . . . . . . . . . . . . 9
L-Board - CRT Output . . . . . . . . . . . . . . 9
Speakers . . . . . . . . . . . . . . . . . . . . . . . . 9
Keyboard Push Button Assembly. . . . . . 9
Disassembly for CRT Replacement . . . . 9
CRT Replacement . . . . . . . . . . . . . . . . . 9
Back Cover Removal . . . . . . . . . . . . . . 11
Chassis Service Adjustment Procedures . . . 12
Schematics, Voltages and waveforms
L-Board Voltages,
140.0V B+ Voltage Confirmation . . . . . 12
Source Voltage Chart . . . . . . . . . . . . . . 12
High Voltage Check . . . . . . . . . . . . . . . 12
PCB & schematics . . . . . . . . . . . . . . . . . 53
A-Board (Left Portion) . . . . . . . . . . . . . . . . . 54
Purity and Convergence Procedure . . . . . . . 13
A-Board (Right Portion). . . . . . . . . . . . . . . . 55
A-Board PCB. . . . . . . . . . . . . . . . . . . . . . . . 56
A-Board Voltages . . . . . . . . . . . . . . . . . . . . 57
D-Board schematics . . . . . . . . . . . . . . . . . . 58
D-Board PCB & voltages. . . . . . . . . . . . . . . 59
G-Board schematics . . . . . . . . . . . . . . . . . . 60
G-Board PCB & voltages . . . . . . . . . . . . . . 61
A-Board Waveforms . . . . . . . . . . . . . . . . . . 62
When the CRT or the Yoke is Replaced 13
Initial Center Static Convergence. . . . . 14
Purity Adjustment . . . . . . . . . . . . . . . . . 14
Dynamic Corvergence Adjustment. . . . 14
DY(YHC, YV, XV) Adjustment . . . . . . . 14
Permalloy Convergence Corrector
Strip (Part No. 0FMK014ZZ) . . . . . 15
DAF Adjustment . . . . . . . . . . . . . . . . . . 15
Serviceman Mode (Electronic Controls) 17
Exiting the Serviceman Mode. . . . . . . . 17
Entering Serviceman
Mode (Back-Open Method) . . . . . . 23
- 3 -
Service Notes
Note: These components are affixed with glue. Be careful not to break or damage any foil under the
component or at the pins of the ICs when removing. Usually applying heat to the component for a
short time while twisting with tweezers will break the component loose.
Leadless Chip Component
(surface mount)
How to Replace Flat-IC
- Required Tools -
Chip components must be replaced with identical chips
due to critical foil track spacing. There are no holes in
the board to mount standard transistors or diodes.
Some chips capacitor or resistor board solder pads
may have holes through the board, however the hole
diameter limits standard resistor replacement to 1/8
watt. Standard capacitor may also be limited for the
same reason. It is recommended that identical
components be used.
•
•
Soldering iron
•
•
De-solder braids
Magnifier
Iron wire or small awl
1. Remove the solder from all of the pins of a Flat-IC
by using a de-solder braid.
De-Solder
Braid
Flat-IC
Chip resistor have a three digit numerical resistance
code - 1st and 2nd significant digits and a multiplier.
Example: 162 = 1600 or 1.6kΩ resistor, 0 = 0Ω (jumper).
Chip capacitors generally do not have the value
indicated on the capacitor. The color of the component
indicates the general range of the capacitance.
Chip transistors are identified by a two letter code. The
first letter indicates the type and the second letter, the
grade of transistor.
2. Put the iron wire under the pins of the Flat-IC and
pull it in the direction indicated while heating the
pins using a soldering iron. A small awl can be
used instead of the iron wire.
Iron
Wire
Awl
Chip diodes have a two letter identification code as per
the code chart and are a dual diode pack with either
common anode or common cathode. Check the parts
list for correct diode number.
Component Removal
1. Use solder wick to remove solder from component
end caps or terminal.
Soldering
Iron
Soldering
Iron
Pull
3. Remove the solder from all the pads of the Flat-IC
by using a de-solder braid.
Soldering
Iron
2. Without pulling up, carefully twist the component
with tweezers to break the adhesive.
De-Solder
Braid
3. Do not reuse removed leadless or chip
components since they are subject to stress
fracture during removal.
Flat IC
Chip Component Installation
1. Put a small amount of solder on the board
soldering pads.
2. Hold the chip component against the soldering
pads with tweezers or with a miniature alligator clip
and apply heat to the pad area with a 30 watt iron
until solder flows. Do not apply heat for more than
3 seconds.
4. Position the new Flat-IC in place (apply the pins of
the Flat-IC to the soldering pads where the pins
need to be soldered). Properly determine the
positions of the soldering pads and pins by
correctly aligning the polarity symbol.
Polarity Symbol
Chip Components
TYPE
SOLDER
CAPS
GRADE
5. Solder all pins to the soldering pads using a fine
tipped soldering iron.
c
b
e
TRANSISTOR
CAPACITOR
1ST DIGIT
Soldering
2ND DIGIT
Solder
Iron
COMMON
CATHODE
MULTIPLIER
=1600 = 1.6k
6. Check with a magnifier for solder bridge between
the pins or for dry joint between pins and soldering
pads. To remove a solder bridge, use a de-solder
braid as shown in the figure below.
SOLDER
CAPS
ANODES
MH DIODE
RESISTOR
De-Solder
Braid
Solder
Bridge
Soldering
Iron
- 4 -
Service Notes (Continued)
IMPORTANT: To protect against possible damage to
Preparation
the solid state devices due to arcing or static
discharge, make certain that all ground wires and CTR
DAG wire are securely connected.
1. Connect Receiver to AC 120 Volts. Do not turn ON.
2. Connect HIGH VOLTAGE meter to 2nd anode
(H.V. button). Note: Use cold ground(
) for
negative lead.
3. Connect the ammeter serial from the flyback anode
lead to the picture tube anode socket.
4. Prepare HHS jig to be connected between TPD50
and TPD51 as shown in Fig. 2.
CAUTION: The power supply circuit is above earth
ground and the chassis cannot be polarized. Use an
isolation transformer when servicing the Receiver to
avoid damage to the test equipment or to the chassis.
Connect the test equipment to the proper ground
() or
(
) when servicing, or incorrect voltages will be
Procedure:
1. Open Connector A17.
measured.
2. Turn power ON and Apply a monoscope pattern.
WARNING: This Receiver has been designed to meet
or exceed applicable safety and X-ray radiation
protection as specified by government agencies and
independent testing laboratories.
3. Set current within 50-100µΑ by changing the
picture and bright controls.
4. Turn power OFF.
5. Connect HHS jig between TPD50 and TPD51 (VR
To maintain original product safety design standards
relative to X-ray radiation and shock and fire hazard,
should be turn fully clockwise).
6. Turn power on.
parts indicated with the symbol
on the schematic
7. Turn slowly the variable resistor to increase the
current until the horizontal sync frequency abruptly
increases indicating that the horizontal frequency is
just beginning to pull out of sync. Maintain the
current within 50-100µΑ by changing the picture
and bright controls
must be replaced with identical parts. Order parts from
the manufacturer’s parts center using the parts
numbers shown in this service manual, or provide the
chassis number and the part reference number.
For optimum performance and reliability, all other parts
should
identical specification.
be
replaced
with
components
of
8. Observe the High Voltage meter. HIGH VOLTAGE
should read less than 40.2kV.
9. Turn power OFF, Remove HHS jig, HV meter,
ammeter and connect A17 connector.
Horizontal Oscillator Disable Circuit
This chassis employs a special circuit to protect
against excessive high voltage and beam current. If, for
any reason, the high voltage and beam current exceed
a predetermined level this protective circuit activates
and detunes the horizontal oscillator that limits the high
voltage. The over-voltage protection circuit is not
adjustable. However, if components indicated by the
10. Turn Power ON. Reset Picture and Brightness
controls. Confirm B+ 140V±1.5V with 120V AC
applied.
11. IF HIGH VOLTAGE IS NOT WITHIN THE
SPECIFIED LIMIT THE CAUSE MUST BE
DETERMINED BEFORE THE RECEIVER IS
RETURNED TO THE OWNER.
symbol
on the schematic in either the horizontal
sweep system or the over-voltage protection circuit
itself are changed, the operation of the circuit should
be checked using the following procedure:
Equipment needed to check the disabled circuit:
1. DC Ammeter
2. High Voltage Meter (0- 50kV electrostatic)
3. Variac or Isolation Transformer
4. HHS Jig (See Fig. 2)
100Ω
Figure 2. HHS Jig
1KΩ
TPD51
TPD50
- 5 -
Receiver Feature Table
FEATURE\MODEL
CT-32SX31E/UE/CE
CT-36SX31E/UE/CE
Chassis
NA8ML
Tunning system
# of channels
Menu language
Closed Caption
V-Chip (USA/CANADA)
2RF
96K
181
Eng/Span/Fr
X
X
X
Remote Model #
Picture tube
EUR511500
AMEC
Comb Filter
3 DIG
VM
X
V/A norm
X
Color Temp
X
MTS/SAP/DBX
BASS/BL/TRE Control
AI Sound
X
X
X
Surround
X
SPATIALIZER/BBE
Built-in audio power
# of speakers
A/V in (rear/front)
S-VHS Input (rear/front)
BBE
10W/CH (10%)
2
3(2/1)
1/1
Component Input
(Y,Pb,Pr)
1
Audio Out
(FAO: F, VAO: V)
F,V
EPJ/HPJ/MISC
HPJ
Dimensions
(WxDxH)
mm
in
667.3x810x568
26.52x32.4x22.72
747x936x610.5
29.88x37.44x24.42
Specifications
Weight (kg/lbs)
74.8/164.56
98.5/216.7
are subject to
change without
Power source (V/Hz)
Anode voltage
120/60
notice
or
obligation.
31.0kV ± 1.0kV
Dimensions and
weights
approximate.
are
1V
75Ω, phono jack
Video input jack
p-p
Audio input jack
500mV RMS 47kΩ
A-Board TNP2AH026
G-Board TNPA1670
L-Board TNPA1673
D-Board TNP2AH027
AB
NIL
NIL
AC
AB
AB
Table 1. Receiver Features
- 6 -
Location of Controls (Receiver)
Front A/V Jacks
VOLUME
CHANNEL
ACTION TV/VIDEO
POWER
Controls Inside
front door
Remote Control
Sensor
2
3
4
5
1
Figure 3. Location of Controls (Receiver).
Quick Reference Control Operation
Quick Reference
Control Operation
1
2
Power Button - Press to turn ON or OFF.
Volume Buttons - Press to adjust Sound Level, or to adjust Audio Menus, Video
Menus, and select operating features when menus are displayed
Channel Buttons - Press to select programmed channels. Press to highlight desired
features when menus are displayed. Also use to select Cable Converter box channels
after programming Remote Control Infra-red codes (the TV/AUX/CABLE switch must
be set in CABLE position).
3
Action Button - Press to display Main Menu and access On Screen feature and
Adjustment Menus.
4
5
TV/Video Button - Press to select TV or Video Input.
- 7 -
Location of Controls (Remote)
MULTI Button
POWER Button
Press to turn ON and OFF.
MUTE Button
Programmable button that can
operate up to seven (7) functions at
once
Press to mute sound.
A second press resumes sound.
Press also to access and delete
Closed Caption display.
TV/VIDEO Button
Press to select TV or Video input.
CH (channel) Buttons
VCR, DVD, LD/CD, AUX, TV, CBL,
DBS, RCVR
Press to select channels.
Use with volume buttons to
navigate in menus.
Component function buttons
DBS EXIT, DBS GUIDE
DBS function buttons.
RECALL Button
VOL (volume) Buttons
Press to adjust TV sound level.
Use with Channel buttons to
navigate in menus.
Press to display Time, status
of Sleep Timer, Channel,
Video mode and Channel
Caption (Station Identifier).
R-TUNE (Rapid Tune) Button.
Press to switch to the previous
channel.
OPEN/CLOSE, SLOW, STILL
DVD function buttons.
“0” - “9”
ACTION Button
Press to display Main Menu and
access or exit On Screen features
and Adjustment Menus.
Press numeric keypad to select any
channel.
REW, PLAY, FF, TV/VCR, STOP,
PAUSE, REC, VCR CHANNEL
Component function buttons.
EUR511500
Figure 4. Location of Controls (Remote).
- 8 -
Disassembly for Service
To release screen GND cables from L-Board L11 & L12
Back Cover
connectors, insert a wire in both sides of connector and
pull upwards the cable, then remove the wire
(See Fig. 6)
Remove all the screws marked with an arrow(
from the back of the Receiver.
)
Note: Screw configuration, type, and number
of screws vary depending on the
model of the Receiver serviced and
the application; various models are
covered in this Manual. Use same
hardware when reassembling the
receiver.
Insert wire
Pull cable upwards
•
•
•
•
•
4 screws at the top edge of the Receiver.
4 screw by the A/V jacks.
1 screw by the antenna jacks.
1 screw at each lower corner of the Receiver.
1 screw by the retainer plate of the AC power cord.
Figure 6. L-Board Screen GND cables release
Speakers
A-Board - Main Chassis
Speaker is secured to the cabinet’s front with 4
screws.
The A-Board assembly rest on a chassis tray along
with the D-Board. Slide chassis tray out. Gently lift tray
and pull out. Disconnect plug connectors; release wire
ties and holders as required for complete chassis
removal.
Keyboard Push Button Assembly
Fastened to the inside of the cabinet front.
Disassembly for CRT Replacement
1. Discharge the CRT as instructed in the Safety
Precautions (see page 2).
2. Disconnect the yoke (DY) plug, degaussing coil
(DEG) plug and the CRT 2nd anode button from
the board.
3. Remove the L-Board from the CRT socket and
unplug the black wires (CRT dag ground) L11 &
L12.
1. A & D-Boards are secured to the chassis tray with
five screws.
2. The A-Board is mated to the D-Board by three
flexible connectors: A1, A2 & A3 (G1, G2 & G3 on
the G-Board, respectively). To remove either
boards, unplug the connectors on the A-Board.
Note: Some tie-wraps that secure the wire dressings
may need to be unfastened for chassis
removal.
4. Lift the Main Chassis (A-Board) and all mounted
boards completely out with the CRT Board attached.
L-Board - CRT Output
CRT Replacement
Plugs into the socket on the CRT neck.
1. Perform Disassembly for CRT Replacement
procedure.
2. Insure that the CRT H.V. Anode button is
discharged before handling the CRT. Read the
Safety Precautions (see page 2) on handling the
picture tube.
To remove this board, first unplug the board from
the CRT neck, then disconnect L1, L2 & L3
connectors, to disconnect the focus F1(Red Cable)
& F2(White Cable) cables, pull the tab and release
the cables, finally disconnect the screen cable from
the D-Board Fly-Back.
3. Remove the components from the CRT neck and
place the cabinet face down on a soft pad.
4. Note the original order for the CRT mounting
hardware as they are remove from the CRT
mounting brackets at each corner of the CRT.
5. Remove the CRT with the degaussing coil and the
dag ground braid attached.
To reinsert back the cables, remember the original
position of cables, F1(red cable) goes to A on the
CRT socket and F2(white cable) goes to B on the
CRT socket.
Press tab
leftward to
Pull cables
release cables
upwards
Note: After servicing the receiver, remember
to dress the cables, as shown above.
Figure 5. F1 & F2 cables release
- 9 -
Disassembly for Service (Continued)
Note: To remove the four brackets holding
the degauss coil from the corners of
the CRT, first remove the CRT from
the cabinet, then remove the Brackets
by pressing the tab on the bracket and
pull upwards. These Brackets are
included in the Degauss Coil Kit, for
part number, please see parts list
section (See Fig. 7).
Note: Reuse all the clampers and mounting
brackets from the degaussing coil and
screen, and when remounting the
degaussing coil assure that is not
touching the speakers, this can be
done
by
placing
some
tape
(See Fig. 7), this may cause mask
vibration. The mounting brackets and
clampers are not supplied with the
replacements.
Degaussing
Coil
Bracket
Important Notice:
When ordering the CRT, please order CRT
and CRT KIT also. Please see parts list
section for part numbers
Degaussing
Coil
Press tab
Then Pull
Upwards
Figure 7. Brackets removal
6. Note the original locations and mounting of the
degaussing coil and the dag ground assembly to
insure proper reinstallation on the replacement
CRT.
To remove and remount the degaussing coil:
The degaussing coil is held in place by clampers
fastened to the CRT corner ears. These clampers
must be installed onto the replacement CRT prior
to mounting the degaussing coil.
To remove and remount the dag ground braid:
a.Unhook the coil spring from the bottom corners
of the CRT ears.
b.Release the braid loop from the upper corners of
the CRT ears.
7. Mount the dag ground braid on the replacement
CRT. Position the degaussing coil with new ties.
Dress coil as was on the original CRT.
8. Replace the components on CRT neck and
reinstall into cabinet. Verify that all ground wires
and circuit board plugs get connected.
- 10 -
Back Cover Removal
4 screws at top edge
1 screw by
antenna jacks
1 screw
1 screw
1 screw at lower
right corner
1 screw
1 screw
1 screw at lower
left corner
Figure 8. Back Cover Removal
- 11 -
Chassis Service Adjustment Procedures
All service adjustments are factory preset and should not require adjustment unless controls and/or
associated components are replaced.
Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use heat sink when the HOT ground symbol
( ) is used. Otherwise, use COLD ground ( ) — Tuner shield.
L826
C840
Q804
A-BOARD
IC001
D-BOARD
Q002
IC002
L824
+
-
IC881
IC882 IC883
L008
T801
IC101
Q801
IC2301
IC1801
T
T
U
N
E
R
U
N
E
R
C3023
IC3001
-
Q551
A/V REAR INPUTS
TP
8
1
MOMENTARILY CONNECT A JUMPER FOR ENTERING SERVICE MODE (TP8 to COLD GND)
140.0V B+ Voltage Confirmation
LOCATION (D-Board)
VOLTAGE
1. Set the Bright and the Picture to Minimum by
using the Picture Menu.
TPD7
(by D511) 220V 220.0V ± 9.0V
2. Connect the DVM between TPP17 (+ side) and cold
LOCATION (A-Board)
VOLTAGE
(by IC883) MAIN 12V 12.0V ± 0.5V
(by IC3001) MAIN 9V 9.0V ± 0.5V
(by L008) MAIN 5V 5.0V ± 0.3V
ground ( ).
3. Confirm that B+ voltage is 140.0V ± 1.5V. This
voltage supplies B+ to the Horizontal Output &
Flyback circuits.
TPA6
TPA7
TPA8
TPA16
TPA18
Source Voltage Chart
120V AC line input. Set the Bright and the Picture to
Minimum by using the Picture Menu. Use cold ground
(by Q002) STBY 3.3V
(by C3023) BTL 30V
3.3V ± 0.2V
32.0V ± 2.0V
(
.
) for the (-) lead of the DVM.
Adjust Picture Menu for normalized video adjustments.
LOCATION (D-Board)
VOLTAGE
TPP17
TPP25
TPP19
TPP20
TPP21
TPP22
(by D825) +B2 140.0V ± 1.5V
High Voltage Check
1. Select an active TV channel and confirm that
horizontal is in sync.
2. Adjust Brightness and Picture using Picture Icon
menu so video just disappears.
3. Confirm B+ 140.0V is within limit.
4. Using a high voltage meter confirm that the High
Voltage is 31.0kV ± 1.0kV.
(by D827) 9V
(by Q804) 15V
9.0V ± 1.5V
15.0V ± 2.0V
15.0V ± 1.5V
-15.0V ± 1.5V
32.5V ± 2.0V
(by C840) 15V (VER.)
(by L826) -15V (VER.)
(by L824) SOUND
- 12 -
Purity and Convergence Procedure
Adjustment is necessary only if the CRT or the
Vertical Raster Shift Adjustment (Only for
Models with Purity/Convergence Assembly with 4
Pairs of Rings).
deflection yoke is replaced or if the setting was
disturbed. The complete procedure consists of:
1. Vertical Raster Shift Adjustment. (Only for Models
with Purity/Convergence Assembly with 4 Pairs
of Rings).
2. Initial static convergence.
3. Setting the purity.
4. Final static convergence.
When the CRT or theYoke is Replaced
Place the yoke on the CRT neck (do not tighten
the clamp).
Place the vertical raster shift tabs at 3 o’clock (90o from
the purity and convergence tabs)
Apply a green pattern with a horizontal line, adjust the
Deflection Yoke so that has no tilt, then secure it.
Adjust center line of the pattern with the mechanical
center of the CRT, this center is determined by two
marks at the side edges of the screen. To adjust the
line, once the vertical raster shift tabs are place at 3
o’clock to reduce its magnetic field effect (see Fig. 9
and Fig. 10) open the tabs the same angle from the
center, until the center line of the pattern becomes a
straight line, centered with the marks of the CRT. (see
Fig. 11)
R&B Convergence Rings
R&B&G Convergence Rings
Purity Rings Centered
Over G3/G4 Gap
Center line
from pattern
Open the
same angle
from center
G3
G4
Mechanical
Center Marks
Vertical Raster Shift tabs
Vertical Raster Shift Ring
Figure 9. Positioning of Purity/Convergence
Figure11. VerticalRaster Shift Adjustment
Assembly (4 Pairs of Rings)
(4 pairs of rings assembly)
R&B&G Convergence Rings
90o
R&B Convergence Rings
Vertical Raster
Shift Rings
Purity Rings
Figure 10. Positioning of Purity/Convergence
Assembly (4 Pairs of Rings)
Turn the Receiver ON. Operate the Receiver for 60
minutes using the first Purity Check field (white screen)
to stabilize the CRT.
Fully degauss the Receiver by using an external
degaussing coil.
Slide the deflection yoke back and forth on the neck of
the CRT until it produces a near white, uniform raster.
- 13 -
Initial Center Static Convergence
Connect a dot/cross hatch generator to the Receiver
and tune in a signal. Observe misconvergence at
center of the screen only.
Adjust the R&B pole magnets; by separating tabs and
rotating to converge blue with red.
Adjust the R&B and R&B&G pole magnets: by
separating tabs and rotating to converge blue and red
(magenta) with green.
Final Convergence Procedure (see Fig. 17
through Fig. 19):
Note: Vertical size and focus adjustments must be
completed prior to performing the convergence
adjustment. Connect a dot pattern generator to the
Receiver. The Brightness level should not be higher
than necessary to obtain a clear pattern.
Converge the red and the blue dots at the center of the
screen by rotating the R&B pole Static Convergence
Magnets.
Align The converged red/blue dots with the green dots
at the center of the screen by rotating the R&B&G pole
Static Convergence Magnets. Melt wax with soldering
iron to reseal the magnets.
Slightly tilt vertically and horizontally (do not rotate) the
deflection yoke to obtain a good overall convergence.
If convergence is not reached at the edges, insert
permalloy (see following section) from the DY corners
to achieve proper convergence. Recheck for purity and
readjust if necessary.
After vertical adjustment of the yoke, insert wedge at 11
o’clock position, then make the horizontal
tilt adjustment.
Secure the deflection yoke by inserting two side
wedges at 3 and 7 o’clock positions.
Apply adhesive between tab (thin portion) of wedge
and CRT and place tape over the tab to secure to
the CRT.
Note: Precise convergence at this point is
not important.
Purity Adjustment
When the Receiver is in the Serviceman Mode for
making electronic adjustments, press the Recall button
on the Remote Control to enter Purity Check. (See the
Service
Adjustments
Electronic
Controls
procedure).
Operate the Receiver for 60 minutes using the first
Purity Check field (white screen) to stabilize the CRT.
Fully degauss the Receiver by using an external
degaussing coil.
Press the Recall button on the Remote Control again
until the Purity Check (green screen) appears.
Loosen the deflection yoke clamp screw and move the
deflection yoke back as close to the purity magnet
as possible.
Adjust the Purity rings to set the vertical green raster
precisely at the center of the screen (see Fig .12).
Dynamic Corvergence Adjustment
Use this for a precisely overall convergence adjust at
the edges.
NOTES:
DY(YHC, YV, XV) Adjustment
1. CRT warm up with white screen
(three guns activated) is needed
to stabilize the shadow mask
expansion.
2. Initial center static convergence
(roughly centers three gun
beams) is required in order to
perform purity adjustment.
YV Adjustment (VR1 for Horizontal dynamic
convergence)
1. Apply a crosshatch pattern.
2. Adjust contrast and brightness customer controls
to obtain a correct picture.
3. With a driver adjust VR1 (located in deflection yoke
board Fig. 19) to obtain a proper corvergence at
top and bottom of the screen (See Fi g.13)
Green Raster
Figure 12. Green Raster Adjustment
Slowly move the deflection yoke forward until the best
overall green screen is displayed.
Tighten the deflection yoke clamp screw.
B&R
Press the Recall button on the Remote Control again
until the purity check blue and red screens appear and
observe that good purity is obtained on each respective
field.
G
B&R
G
Press the Recall button on the Remote Control again
until Purity check (white screen) appears. Observe the
screen for uniform white. If purity has not been
achieved, repeat the above procedure.
B&R
G
B&R
G
Figure 13. VR1 Adjustment (YV)
- 14 -
YH Adjustment (VR2 for Vertical dynamic
convergence)
1. Apply a crosshatch pattern.
Permalloy Convergence Corrector Strip
(Part No. 0FMK014ZZ)
2. Adjust contrast and brightness customer controls
to obtain a correct picture.
3. With a driver Adjust VR2 (located in deflection yoke
board Fig. 19) to obtain a proper corvergence at
left and right side of the screen. (See Fig. 14)
This strip is used in some sets to match the yoke and
CRT for optimum convergence. If the yoke or CRT is
replaced, the strip may not be required.
First converge the set without the strip and observe
the corners.
If correction is needed:
1. Place strip between CRT and yoke, in quadrant
needing correction. Slowly move it around for
desired results.
2. Press adhesive tightly to the CRT and secure
with tape.
DAF Adjustment
Preparation:
1. Apply a crosshatch pattern.
2. Set user controls, bright to center and picture to
max.
B&R
B&R G
B&R
B&R G
G
G
Figure 14. VR2 Adjustment (YH)
3. Connect a frequency counter to TPD10.
Procedure:
XV Adjustment(precise adjustment)
1. Apply a crosshatch pattern.
2. Adjust contrast and brightness customer controls
to obtain a correct picture.
3. With a driver adjust the coil located in deflection
yoke board to obtain a proper convergence
horizontally.
1. Connect channel one of the oscilloscope with 10x1
probe to TPP33.
2. Connect channel two of the oscilloscope with 10x1
probe to CRT HEATER (L-Board).
3. Adjust R1581 so that frequency counter reads
15.7kHz±100Hz.
B&R
TPP33
G
B&R
G
HEATER
PIN
B&R
G
B&R
G
Figure 16. DAF Adjustment
Figure 15. XV Adjustment
4. Adjust R1577 so that signal on TPP33 is on phase
with CRT HEATER (L-Board) pin. (see Fig. 16)
Note: Apply a red pattern and confirm purity, if purity
is poor, repeat purity adjustments.
- 15 -
As the yoke is tilted
vertically, the rasters
G
R
B
produced
by
the
outside guns rotate in
opposite directions.
Figure 17. Vertical Yoke Movement
Raster produced from one of the
outside electron beams
Raster from the other side electron
beam
R G B
Static convergence magnets are set for
center convergence
As the yoke is tilted horizontally, one
raster gets larger while the other gets
smaller
Figure 18. Horizontal Yoke Movement
For Adjustment
of DY (YHC/YV/XV)
Dynamic Convergence
2 Poles(Purity)
2 Poles(VRS Adj)
4 Poles
6 Poles
Figure 19. Convergence Magnets and Wedges Location
IMPORTANT NOTE:
Always Exit the Serviceman
Mode Following Adjustments.
- 16 -
Serviceman Mode (Electronic Controls)
This Receiver has electronic technology using the I²C Bus Concept. It performs as a control function and it
replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the control
functions are now performed by using “On Screen Display Menu”. (The Serviceman Adjustment Mode.)
Note: It is suggested that the technician reads all the way through and understand the following procedure for
Entering/Exiting the Serviceman Adjustment Mode; then proceed with the instructions working with the
Receiver. When becoming familiar with the procedure, the Flow Chart for Serviceman Mode may be used
as a quick guide.
Quick Entry to Serviceman Mode:
At times when minor adjustments need to be done to the electronic controls, the method of Entering the
serviceman Mode without removal of the cabinet back is as follows using the Remote Control:
1. Select SET-UP icon and select CABLE mode.
2. Select TIMER icon and set SLEEP time for 30 Min.
3. Press ACTION button 3 times to exit menus.
4. Tune to the Channel 124.
5. Adjust VOLUME to minimum (0).
6. Press the VOL
button (decrease) on Receiver. Red “CHK” appears in upper corner.
To toggle between Aging and Serviceman modes:
While the “CHK” is displayed on the left top corner of the CRT, pressing the Action and the Volume Up buttons
on the Receiver simultaneously will toggle between the modes. Red “CHK” for Serviceman and yellow “CHK” for
Aging.
7. Press the Power Button on the Remote Control to select one of the Serviceman Adjustment Modes.
1) B= Serviceman VCJ SUB-DATA ADJUSTEMENT.
2) C= Serviceman VCJ CUT-OFF ADJUSTMENT.
3) D= Serviceman GEOMETRY ADJUSTMENT.
4) M= Serviceman MTS ADJUSTMENTS.
5) P= Serviceman PIP ADJUSTMENT.
6) S= Serviceman S OPTION ADJUSTMENTS.
7) X = Serviceman X OPTION ADJUSTMENT.
8) E = Serviceman E OPTION ADJUSTMENTS
9) “CHK” = Normal operation of CHANNEL
and VOLUME
.
a
b
a
b
32
B
0
2
215
C
0
Note: Only the applicable settings for
the Receiver serviced will be
available (See a in Fig. 20).
An address Menu appears in the right
hand corner of the screen
Figure 20. Serviceman Mode Menu Adjustments.
Exiting the Serviceman Mode:
Press the Action and the Power buttons on the Receiver simultaneously for at least 2 seconds.
THE RECEIVER EXITS SERVICEMAN MODE.
The Receiver momentarily shuts off; then comes back on tuned to channel 3 with a preset level of sound.
Any programmed channels, channels caption data and some others user defined settings will be erased.
IMPORTANT NOTE:
Always Exit the Serviceman Mode
Following Adjustments.
- 17 -
Press the Power Button on the Remote Control to select the Serviceman Adjustment .
For Adjustments:
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the
Remote Control to select one of
the available Service Adjustments
(a in Fig. 20).
value set (b in Fig. 20) for
each address before
modifying anything. It is
easy to erroneously adjust
the wrong item.
Remote Control to adjust the
level of the selected Service
Adjustment (b in Fig. 20).
Default
Level
Sub-Data Adjustment
B00
SUB-COLOR
SUB-TINT
31
CH
CH
B01
B02
B03
B04
B05
B06
B07
B08
B09
B0A
40
SUB-BRIGHTNESS
SUB-CONTRAST
40
16
SUB-TINT VIDEO
16
SUB-COLOR VIDEO
SUB-TINT COMP
22
CH
63
SUB-COLOR COMP
SUB SHARP TV/VIDEO
SUB SHARP S-VHS/COMP
SUB-CONTRAST FIXED
28
10
17
15
PW
Default
Level
Cut-Off Adjustment
C00
C01
C02
C03
C04
C05
C06
C07
C08
C09
C0A
CUT-OFF R
CUT-OFF G
128
128
128
31
CH
CH
CUT-OFF B
BRIGHTNESS
G DRIVE
CH
64
B DRIVE
64
DRIVE C TEMP
CONT C TEMP
CUTOFF R COMP
CUTOFF G COMP
CUTOFF B COMP
8
5
112
114
103
PW
IMPORTANT NOTE:
Always Exit the Serviceman
Mode Following Adjustments.
To D Items.
- 18 -
Press the Power Button on the Remote Control to select the Serviceman Adjustment
For Adjustments:
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the
Remote Control to select one of
the available Service Adjustments
(a in Fig. 20).
value set (b in Fig. 20) for
each address before
modifying anything. It is
easy to erroneously adjust
the wrong item.
Remote Control to adjust the
level of the selected Service
Adjustment (b in Fig. 20).
Default
Geometry Adjustments
Level
13
37
5
D00
H POSITION
V SIZE
CH
CH
D01
D02
D03
D04
D05
D06
D07
D08
D09
D0A
D0B
D0C
D0D
D0E
V S CORRECTION
V LIN CORRECTION
E/W TRAPEZIUM
V AGC
8
9
1
CH
V POSITION
1
V CENTERING
V CENTERING DAC SW
V-BLK START
V-BLK STOP
65
0
12
14
6
EW CORNER
EW PARABOLA
H WIDTH
11
20
90
OSD POSITION
PW
Default
Level
MTS Adjustment
M00
M01
INPUT LEVEL
33
6
CH
LOW-LEVEL SEPARATION
M02 HIGH-LEVEL SEPARATION
25
PW
To P Items.
IMPORTANT NOTE:
Always Exit the Serviceman
Mode Following Adjustments.
Note: Some adjustment modes may not be
available in some formats.
- 19 -
Press the Power Button on the Remote Control to select the Serviceman Adjustment
For Adjustments:
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the
Remote Control to select one of
the available Service Adjustments
(a in Fig. 20).
value set (b in Fig. 20) for
each address before
modifying anything. It is
easy to erroneously adjust
the wrong item.
Remote Control to adjust the
level of the selected Service
Adjustment (b in Fig. 20).
Default
Level
PIP Adjustment
P00
PIP COLOR
PIP TINT
53
CH
P01
P02
P03
P04
P05
P06
P07
P08
P09
P0A
P0B
P0C
P0D
64
PIP BRIGHTNESS
PIP CONTRAST
PIP POS V_TOP
PIP POS V_BOTTOM
PIP POS H_LEFT
PIP POS H_RIGHT
PIP POS
11
58
26
143
10
CH
101
26
CH
PIP POS
160
10
PIP POS
PIP POS
116
N/A
4
N/A
PIP YDELAY
PW
To S Items.
Note: Some adjustment modes may not be
available in some formats.
- 20 -
Press the Power Button on the Remote Control to select the Serviceman Adjustment
For
Adjustments:
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the
Remote Control to select one of
the available Service Adjustments
(a in Fig. 20).
value set (b in Fig. 20) for
each address before
modifying anything. It is
easy to erroneously adjust
the wrong item.
Remote Control to adjust the
level of the selected Service
Adjustment (b in Fig. 20).
Default
Level
OPTIONS Adjustment
S00
ABL GAIN
ABL POINT
3
3
CH
S01
S02
S03
S04
S05
S06
S07
S08
S09
S0A
S0B
RGB BRIGHTNESS
RGB GAMMA
GAMMA
3
1
1
VSM-G
0
BS POINT
3
CH
CLOCK ADJUST
CAP DIGITAL FIL
CAP SCROLL
RGB MATRIX
RGB MATRIX YUV
128
0
CH
1
6
5
PW
To X Items.
IMPORTANT NOTE:
Always Exit the Serviceman
Mode Following Adjustments.
- 21 -
Press the Power Button on the Remote Control to select the Serviceman Adjustment
For Adjustments:
1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the
Remote Control to select one of
the available Service Adjustments
(a in Fig. 20).
value set (b in Fig. 20) for
each address before
modifying anything. It is
easy to erroneously adjust
the wrong item.
Remote Control to adjust the
level of the selected Service
Adjustment (b in Fig. 20).
Default
Level
X Option Adjustment
X00
V ENHANCER
V ENH NL
3
CH
CH
X01
X02
X03
X04
X05
X06
X07
X08
X09
X0A
X0B
X0C
X0D
X0E
1
H PEAKING GAIN
V CORING
2
1
C TRAP GAIN
GEO MAG CEN
GEO MAG GAIN
H LOCK
0
179
10
1
CH
H LOCK L
70
313
266
0
H SEPA 1L
H SEPA 2L
H LOCK W
H LOCK L
70
313
266
H SEPA 1WL
H SEPA 2WL
Default
Level
PW
E Option Adjustment
E00
E01
E02
SURROUND EFFECT
BBE LOW
3
4
6
CH
BBE HIGH
PW
To B Items.
- 22 -
To Check Purity:
Press the Recall Button on the Remote Control when in Serviceman Mode (red “CHK” is displayed) to enter the
Purity Field Check Mode.
NORMAL
SCREEN
Press Recall again to select desired field.
BLUE
SCREEN
GREEN
SCREEN
RED
SCREEN
WHITE
SCREEN
Figure 21. Purity Check Field Mode.
Helpful Hints
Entering Serviceman Mode (Back-Open Method)
1. While the Receiver is ON or Puggled and operating in Normal Mode,
momentarily short test point FA1 (TP8) to Cold Ground (
) FA2
(TP3) A-Board.
The Receiver enters the Aging Mode.
Yellow letters “CHK” appear in the upper left corner of the CRT.
(The Volume Up/Down will adjust rapidly).
2. Simultaneously press the Action and the Volume Up buttons on the
Receiver Control Panel.
The Receiver enters the Serviceman Mode.
The letter in “CHK” turn red.
(The Volume Up/Down will adjust normally).
(All customer controls are set to nominal level).
IMPORTANT NOTE:
Always Exit the Serviceman
Mode Following Adjustments.
- 23 -
Instructional Flow Chart for Serviceman Mode
IMPORTANT NOTE:
Always Exit the Serviceman
Mode Following Adjustments.
NORMAL MODE
Momentarily shortFA1 toFA2
.
AGING MODE
•
•
•
Yellow “CHK” appears in upper left corner of screen.
Volume Up/Down operate rapidly.
WHITE
SCREEN
Customer Controls are set to nominal level.
RECALL
QUICK ENTRY TO SERVICEMAN MODE
(ON REMOTE)
•
•
•
•
•
Select CABLE Mode.
Adj.
Set SLEEP time for 30 Min.
Tune to Channel 124.
Adjust Volume to minimum.
Press VOL DOWN On Receiver.
N
EXIT
needed?
Y
Press Action + Volume Up Simultaneously (ON Receiver)
SERVICEMAN MODE
BLUE
SCREEN
GREEN
SCREEN
•
•
•
“CHK” turns red.
Volume Up/Down operate normally.
Customer Controls are set to nominal level.
C
RED
SCREEN
WHITE
SCREEN
RECALL
(ON REMOTE)
Adj.
needed?
N
EXIT
Press Action and Power on the Receiver
simultaneously for at least 2 seconds.
Y
POWER
(ON REMOTE)
ON REMOTE CONTROL TO
SELECT ADJUSTMENT
CH
SUB-DATA ADJUSTMENTS.
B ITEMS.
ON REMOTE TO ADJUST
VOL
VOL
THE LEVEL
POWER
(ON REMOTE)
A
Figure 22. Flow Chart for Serviceman Mode.
- 24 -
Instructional Flow Chart for Serviceman Mode - Continued
A
CUT-OFF ADJUSTMENTS.
C ITEMS.
ON REMOTE CONTROL TO
SELECT ADJUSTMENT
CH
Y
Adj.
needed?
ON REMOTE TO ADJUST
VOL
VOL
THE LEVEL
N
POWER
(ON REMOTE)
PINCUSHION ADJUSTMENTS.
D ITEMS.
ON REMOTE CONTROL TO
SELECT ADJUSTMENT
CH
Y
Adj.
needed?
IMPORTANT NOTE:
Always Exit the Serviceman
Mode Following Adjustments.
ON REMOTE TO ADJUST
THE LEVEL
VOL
VOL
N
POWER
(ON REMOTE)
MTS ADJUSTMENTS.
M ITEMS.
ON REMOTE CONTROL TO
SELECT ADJUSTMENT
CH
Adj.
needed?
Y
ON REMOTE TO ADJUST
VOL
VOL
THE LEVEL
N
POWER
(ON REMOTE)
B
Figure 23. Flow Chart for Serviceman Mode (cont).
- 25 -
Instructional Flow Chart for Serviceman Mode - Continued
B
PIP ADJUSTMENTS.
P ITEMS.
ON REMOTE CONTROL TO
SELECT ADJUSTMENT
CH
Adj.
needed?
Y
ON REMOTE TO ADJUST
VOL
VOL
THE LEVEL
N
POWER
(ON REMOTE)
OPTIONS ADJUSTMENTS.
S ITEMS.
ON REMOTE CONTROL TO
SELECT ADJUSTMENT
CH
Y
Adj.
needed?
ON REMOTE TO ADJUST
VOL
VOL
THE LEVEL
N
POWER
(ON REMOTE)
COMB-FILTER ADJUSTMENTS.
X ITEMS.
ON REMOTE CONTROL TO
SELECT ADJUSTMENT
CH
Adj.
needed?
Y
N
POWER
ON REMOTE TO ADJUST
(ON REMOTE)
VOL
VOL
THE LEVEL
N
C
EXIT
Press Action and Power on the Receiver
simultaneously for at least 2 seconds.
Figure 24. Flow Chart for Serviceman Mode (cont).
Note: Some adjustments modes may not be
available in some models depending
on available options.
IMPORTANT NOTE:
Always Exit the Serviceman Mode
Following Adjustments.
- 26 -
Service Adjustments (Electronic Controls)
Sub-Contrast Adjustment
Serviceman DAC Adjustment (B02, B03)
This adjustment is factory set. Do not adjust unless
repairs are made to associated circuit, the CRT Board
or when the CRT is replaced.
Preparation:
3 IRE
1. Apply a Black-White pattern.
2. Set the picture settings to normal and color to
minimum.
7.5 IRE
3. RGB GAMMA (S03) DAC from 1 to 0
4. Connect the oscilloscope to TP47R.
Figure 26. Pattern
5. Connect a jumper from TPD2 to cold ground ( ).
Procedure:
Tint/Color Adjustment
1. In the Serviceman Mode, select DAC B2 for Sub-
Brightness to obtain 2.6±0.1V between 7.5IRE and
GND level at TP47R (See Fig. 25)
2. In the Serviceman Mode, select DAC B03 for Sub-
Contrast to obtain 1.5±0.1V between 7.5IRE and
100IRE level at TP47G
3. Remove short jumper and set RGB GAMMA (S03)
DAC to 1.
4. Set the picture settings to normal.
.
Serviceman DAC Adjustment (B01) (B00)
Preparation:
1. Apply a rainbow color bar signal.
2. Preset the following controls:
• Brightness . . . . . . . Min.
• Color . . . . . . . . . . . . Center.
• Tint . . . . . . . . . . . . . Center.
• Picture . . . . . . . . . . . Max.
• Sharpness. . . . . . . . Min.
3. Set RGB GAMMA (S03) DAC to 0
4. Connect the oscilloscope to TP47B (A-Board).
100IRE
5. Connect a jumper from TPD2 to GND ( ).
Procedure:
1.5
±
0.1V
1. In the Serviceman Mode for making electronic
adjustments, select (B01) DAC Sub-Tint
Adjustment. Adjust until the waveform measured is
as the one shown in Fig. 27.
7.5IRE
2.6
±
v
0.1V
GND
Figure 25. waveform
A
B
TP47B (A-Board)
C
Sub-Brightness (B02)
1 2 3
10
4 5 6 7 8 9
Adjustment of this control is important for setting proper
operation of customer brightness and picture controls.
Do not adjust the SCREEN VR after the Sub-
Brightness is set.
A to B = 1 unit
to C = 2 units
A
Figure 27. TP47B waveform
Preparation:
1. Normalize picture settings.
2. Switch COLOR TEMPERATURE to NORMAL.
2. Connect the oscilloscope to TP47G or TP35 (L-
Board) and cold GND.
3. Select DAC Sub-Color Adjustment (B00) and
adjust for peak to peak amplitude to be
0.50Vp-p ±0.05V as shown in Fig .28.
Procedure:
1. Apply a black white cross pattern.
2. In the Serviceman Mode for making electronic
adjustments, select the DAC adjustment (B02) and
adjust data so that 7.5IRE part is the same light
output as the 3IRE part (See Fig. 26).
TP47G (A-Board)
1 2 3 4 5 6
0.50Vp-p±0.05V
7 8 9 10
Figure 28. TP47G waveform
4. Remove short jumper and set RGB GAMMA (S03)
DAC to 1.
PIP Sub-Contrast Adjustment (P03)
- 27 -
Procedure:
1. Connect the oscilloscope to TPY1.
4. Observe the oscilloscope waveform at Horizontal
rate and adjust the Serviceman Mode Sub-Bright
DAC (B02) level until a scanning period of
2.3±0.05V above DC ground is measured, as
indicated in Fig. 30.
2. Apply a color bar signal in main and PIP (PIP on).
3. In the Serviceman Mode for making electronic
adjustments, select the DAC adjustment (P03) for
PIP Sub-Subcontrast so that child (PIP) level is
90% of parent (MAIN) signal (See Fig. 29)
2.3±0.05V DC
0V DC
Figure 30. TP35 Waveform
A
Ax0.9
5. Press the R-Tune key on the remote.
6. Connect the scope to RED Cathode (KR) on the
CRT-Board.
7. In the Serviceman Mode for making electronic
adjustments, select the RED CUTOFF DAC (C00).
Figure 29. Waveform
8. Press the R-Tune key on the remote.
Color Temperature Adjustment
(B/W Tracking)
9. View scope trace at Horizontal rate and adjust the
Serviceman Mode DAC (C00) level until a
scanning period of 170±2V above DC ground is
measured, as indicated in Fig. 31.
Serviceman DAC Adjust.
(C00) (C01) (C02) (C04) (C05)
Minor Touch-Up Method
10. Press the R-Tune key on the remote.
11. Write the same C00 data to C01 and C02.
12. Press the R-Tune key on the remote.
OBSERVE low and high brightness areas of a B/W
picture for proper tracking. Adjust only as required for
“good gray scale and warm highlights”.
1. LOW LIGHT areas – In Serviceman Mode for
making electronic adjustments, select Cutoff (C00)
RED, (C01) GRN, (C02) BLU and adjust the
picture for gray.
2. HIGH LIGHT areas – In Serviceman Mode for
making electronic adjustments, select Drive (C04)
GRN, (C05) BLU and adjust the picture for warm
whites.
13. Turn the Screen Control (part of FBT) slowly
clockwise until a slightly color horizontal line
appears.
14. Adjust DAC C01 and C02 until the horizontal line
becomes white.
15. Press the R-Tune key on the Remote
170±2V DC
0V DC (Ground)
Complete Adjustment
Figure 31. KR Waveform
Preparation:
1. Turn the Receiver “ON” and allow 10 minutes
warm up at high brightness.
2. Apply a color bar signal with color “OFF”.
3. Turn the SCREEN control (part of FBT T551) fully
counterclockwise.
16. In the Serviceman Mode for making electronic
adjustments select the DAC DRIVE adjustments
(C04) GRN, (C05) BLUE and adjust for warm white
in a white color bar pattern.
Procedure:
17. Apply a monoscope pattern and check for a good
picture.
Preset the following Serviceman DACs for best results:
• C0. . . . . . . . . . . . . . 128
18. EXIT the Serviceman Mode.
• C1. . . . . . . . . . . . . . 128
• C2. . . . . . . . . . . . . . 128
• C4. . . . . . . . . . . . . . . 64
• C5. . . . . . . . . . . . . . . 64
1. Connect the oscilloscope to TP37 (L-Board).
2. In Serviceman Mode for making electronic
adjustment, select the Sub-Bright DAC (B02).
3. Press the R-Tune key on the remote.
- 28 -
Service Adjustments (Electronic Controls, cont.)
Horizontal Centering (D00)
This Adjustment helps to center the picture horizontally
Preparation:
H-Size Adjustment (D0D)
Preparation:
1. Apply a Monoscope pattern
Procedure:
Connect a monoscope pattern signal.
Procedure:
1. Adjust “D0D” DATA so that width “A” and “B”
becomes 5.00±0.40 (when using factory pattern)
1. In the Serviceman Mode for making electronic
adjustments. Select the Horizontal Centering
Adjustment DAC (D00) and adjust until the center
of the monoscope pattern is centered on CRT.
2. EXIT the Serviceman Adjustment Mode.
E-W PCC Adjustment (D0C)
(See Fig. 34).
4
4
This adjustmet helps to correct left and right sides of
picture.
B
A
Preparation:
1. Apply a Crosshatch pattern
2. Normalize the Picture Icon Video adjustments.
Procedure:
4
4
5
1
2
6
4
3
1. Adjust “D0C” DATA so that the 1st line and 3rd line
5.00
make a good balance (See Fig. 32).
Figure 34. H-Size Adjustment
Note: When using a different pattern, correlate with
factory pattern.
Min. Adjustment
Max. Adjustment
Correct Adjustment
V-Size and V-Position Adjustment
(D01 & D06)
Figure 32. E-W PCC Adjustment
Corner PCC Adjustment (D0B)
Preparation:
Preparation:
1. Apply a Crosshatch pattern.
1. Apply a Crosshatch pattern
2. Normalize the Picture Icon Video adjustments.
Procedure:
1. To adjust upper and lower linearity.
2. Adjust “D0B” to straighten upper and lower lines
(See Fig. 33)
Procedure:
1. Apply a monoscope pattern.
2. Enter Serviceman Mode
3. Adjust (D06) to center the picture to the marks on
the CRT.
4. Adjust (D01) to make circle of monoscope pattern
a round circle.
V-Linearity Adjustment (D03)
Preparation:
1. Apply a Crosshatch pattern
Min. Adjustment
Max. Adjustment
Correct Adjustment
Procedure:
Figure 33. Corner Adjustment
1. Enter Serviceman Mode, Adjust linearity data
“D03” so that interval of “a” is same as “b” (a=b).
(See Fig. 35)
a=b
a
b
Figure 35. Linearity adjustment
- 29 -
V-Correction Adjustment (D02)
Preparation:
1. Apply a Crosshatch pattern.
Stereo Separation Adjustment
(M01 & M02)
Preparation:
2. Adjust (D01) so that V-Size is regular size.
3. If b-a<-1.5mm (in top and bottom), increase (D02)
by one step and adjust (D01) so that V-Size is
regular; repeat steps until b-a≤1.5mm
1. Connect an RF signal generator to the RF antenna
input.
2. Connect oscilloscope to TPE10.
4. If b-a>-1.5mm (in top and bottom), decrease (D02)
by one step and adjust (D01) so that V-Size is
regular; repeat steps until b-a≤1.5mm.
Procedure:
1. Select Stereo Mode in Audio menu
2. Apply the following signal from the RF signal
generator:
Video: 100 IRE flat field, 30% modulation.
Audio: 300Hz, 100% modulation, stereo (left only)
(70 ±5dB, 75Ω OPEN, P/S 10dB).
a
3. Adjust the MTS Low-Level Separation Adjustment
(M01) until the amplitude displayed on the scope
is minimum.
b
4. Apply the following signal from the RF
signal generator:
Figure 36. V-Adjustment
Video: 100 IRE flat field, 30% modulation.
Audio: 3KHz, 100% modulation, stereo (left only)
(70 ±5dB, 75Ω OPEN, P/S 10dB).
5. Adjust the MTS High-Level Separation Adjustment
(M02) until the amplitude displayed on the scope is
minimum.
MTS Circuit Adjustments
The MTS Circuit Adjustments require two steps:
1. Input Level Adjustment.
6. Repeat above steps 2 through 5 until the amplitude
is minimum for both signals.
2. Stereo Separation Adjustment.
Input Level Adjustment (M00)
Preparation:
1. Connect an RMS meter with filter jig as shown in
Fig. 37.
TPE11
RMS
METER
10k
4700p
Figure 37. Filter Jig
2. Connect an RF signal generator to the RF
antenna input.
Procedure:
1. Apply the following signal from the RF signal
generator:
Video: 100 IRE flat field, 30% modulation.
Audio: 300Hz, 100% modulation, monaural
(70 ±5dB, 75Ω OPEN, P/S 10dB).
2. Adjust the MTS Input Level Adjustment (M0) until
the voltage measured is 106 ± 6.0mV rms.
- 30 -
Service Adjustments (Electronic Controls, cont.)
3. Calculate and set S07 based on the
Clock Adjustment (S07)
Preparation:
Connect the frequency counter to TPS1 (IC001
following formula:
S07 = 128 + { 873.90625 – pin13[Hz]} 968
pin-13) and cold ground ( ).
Note: Frequency Counter probe capacitance should
be 8pF or less.
Figure 38. Set Turned ON
Procedure:
1. Measure TPS1 (IC001 pin 13) for the frequency of
the waveform and record the reading.
S07 = 128 + { 218.47656 – pin13[Hz]} 3873
Note: Pin 13 measurement must have at least four
digits of resolution following the decimal point.
Example: 000.0000
2. Place the Receiver into Serviceman Mode for
making electronic adjustment, select the Clock
Adjustment DAC (S07).
Figure 39. Set Turned OFF
Note: Pin 13 measurement will not change
regardless of the value stored in S07.
Service Adjustments (Mechanical Controls)
Focus (part of T551)
This adjustment is to make the picture clear
Preparation:
Connect a Signal generator and select a dot pattern.
Procedure:
Adjust the FOCUS controls to obtain the sharpest and
clearest dot pattern.
a. Adjust VF1 to minimize width on vertical lines on
corners.
b. Adjust VF2 to minimize width on horizontal lines
on corners.
- 31 -
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