JVC Cassette Player KS FX922R User Manual

KS-FX922R  
SERVICE MANUAL  
CASSETTE RECEIVER  
KS-FX922R  
Area Suffix  
E... Continental Europe  
KS-FX922R  
DISP  
DAB  
TP  
RDS  
PTY  
7
8
9
10  
11  
12  
MO  
Contents  
Safety precaution ------------------------------------- 1-2  
1-3  
Location of main parts-------------------------------  
Disassembly method -------------------------------- 1-4  
Adjustment method ---------------------------------- 1-11  
Description of major ICs ---------------------------- 1-15  
No.49596  
Feb. 2001  
DoCwOnPloYaRdIfGroHmTWww20.S0o1mVaInCuTaOlsR.coCmO. MAlPl MANanYuaOlsFSJeAaPrcAhNA, nLdTDD.ownload.  
KS-FX922R  
Arrangment of adjusting  
Head amplifier board section (Reverse side)  
VR402:Rch  
VR401:Rch  
(Dolby NR level adj)  
(Dolby NR Frequency response adj)  
B402  
C409  
R411  
VR401  
VR402  
C412  
C410  
C411  
R413  
B416  
TPP  
C404  
E
C418  
C413  
Q401  
1
R424  
C405  
CP402  
1
R421  
R422  
2
R408  
31  
IC402  
1
11  
B409  
R425  
C419  
C414  
B401  
C407  
21  
IC401  
C408  
D402  
1
R414  
R407  
R406  
R403  
C402  
CP403  
1
FSMW1101A  
1
17  
B405  
B413  
Information for using a car audio service jig  
1. We're advancing efforts to make our extension cords common for all car audio products.  
Please use this type of extension cord as follows.  
2. As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the  
mechanism assembly after disassembly.  
3. Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assembly  
and main board assembly.  
Check for mechanism driving section such as motor ,etc..  
Cassette mechanism  
Disassembly method  
1. Remove the bottom cover.  
2. Remove the front panel assembly.  
3. Remove the top cover .  
4. Install the front panel.  
5. Confirm that current is being carried by connecting  
an extension cord jig.  
Note  
Available to connect to the CP701 connector when in-  
stalling the front panel.  
Extension cord  
EXTKSRT002-18P  
Main board  
to Cassette mechanism  
Front panel assembly  
to Main board  
1-12  
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EXTKSRT002-18P  
KS-FX922R  
Extension cord  
The mechanism should be directly connected to the board using the extension wire.  
EXT-KSRT002-18P  
Cassette mechanism  
Extension cord  
EXTKSRT002-18P  
Main bboard  
Front panel assembly  
to Cassette mechanism  
to Main board  
EXTKSRT002-18P  
1-13  
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KS-FX922R  
Item  
Conditions  
Adjustment and Confirmation methods S.Values  
Adjust  
1. Head  
Head height adjustment  
Test tape:  
SCC-1659  
VT703(10kHz)  
azimuth  
adjustment  
Adjust the azimuth directly. When you  
adjust the height using a mirror tape,  
remove the cassette housing from the  
mechanism chassis. After installing the  
cassette housing, perform the azimuth  
adjustment.  
A line  
Load the SCC-1659 mirror tape. Adjust with  
height adjustment screw A and azimuth  
adjustment screw B so that line A of the  
mirror tape runs in the center between Lch  
and Rch in the reverse play mode.  
1.  
Head shield  
The head is at low position  
during.  
After switching from REV to FWD then to  
REV, check that the head position set in  
procedure 1 is not changed. (If the position  
has shifted, adjust again and check.)  
2.  
3.  
B line  
Head shield  
Adjust with azimuth adjustment screw B so  
that line B of the mirror tape runs in the  
center between Lch and Rch in the forward  
play mode.  
The head is at High position  
during REV.  
Output  
level:  
Maximum  
Head azimuth adjustment  
Load VTT724 (VT724) (1kHz) and play it  
back in the reverse play mode. Set the Rch  
output level to max.  
1.  
2.  
PBHead  
FWD Adj B  
Load VTT703 (VT703) (10kHz) and play it  
back in the forward play mode. Adjust the  
Rch and Lch output levels to max, with  
azimuth adjustment screw B. In this case,  
the phase difference should be within 45 .  
HEIGHT Adj A  
REV Adj C  
Engage the reverse mode and adjust the  
output level to max, with azimuth  
adjustment screw C.  
(The phase difference should be 45 or  
more.)  
3.  
4.  
phase  
(0 )  
(45 )  
When switching between forward and  
reverse modes, the difference between  
channels should be within 3dB. (Between  
FWD L and R, REV L and R.)  
When VTT721 (VT721) (315Hz) is played  
back, the level difference between channels  
should be within 1.5dB.  
5.  
1.  
2. Tape speed  
and wow  
Tape speed: Built-in volume  
Test tape: VTT712  
(3kHz)  
Check to see if the reading of the F, counter /  
wow flutter meter is within 3015 3045(FWD  
/ REV), and less than 0.35% (JIS RMS).  
3015  
3045Hz  
resistor  
flutter  
confirmation  
Wow  
flutter: less  
than 0.35%  
In case of out of specification, adjust the  
motor with a built-in volume resistor.  
2.  
Play test tape VTT724, and set the volume  
position at 2V.  
3. Play back  
frequency  
1.  
2.  
Test tape: VTT724  
(1kHz)  
VTT739  
(63Hz / 1kHz / 10kHz)  
Speaker out  
1kHz / 63Hz  
response  
confiramation  
: 0  
1kHz / 10kHz  
: -1 3db  
3db  
Play test tape VTT739 and confirm.  
1kHz / 10kHz: -1  
1kHz / 63Hz: 0  
3dB,  
3dB,  
When 10kHz is out of specification, it will be  
necessary to read adjust the azimuth.  
3.  
The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack.  
1-14  
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KS-FX922R  
Block Diagram  
SUB  
MOTOR  
SWITCH  
TAPE END.STANDBY  
MAIN  
MOTOR  
5
4
3
2
1
HEAD  
CN402  
CN403  
LCH  
RCH  
TO SPEAKER  
MOTOR  
TAPE IN  
MODE  
STANDBY  
TAPE END  
REEL  
METAL  
TO CD CHANGER  
CONNECTOR TO REAR LINE OUT  
J321  
J801  
CP901  
IC401  
PB EQ  
L/R F  
L/R R  
FRONT L/R  
REAR L/R  
CXA2560Q  
DOLBY  
F/R  
MS  
IC301  
POWER AMP.  
LA4743K  
SCK  
SI/SO  
LCH  
RCH  
IC402  
IC801  
CHANGER CONTROL  
HD74HC126FP-X  
FF/REW  
DC MOTOR DRIVER  
LB1641  
OUT LR  
OUT RR  
OUT LF  
OUT RF  
SUBMO+  
SUBMO-  
MECHANISM CONTROL  
CD RCH  
CD LCH  
JBUS SI  
JBUS SO  
JBUS I/O  
IC161  
E.VOLUME  
TEA6320T-X  
F/R  
MODE  
STANDBY  
FF/REW  
MOTOR  
SUBMO  
TAPE IN  
DOLBY  
MS  
IC602  
TAPE L/R  
JBUS SCK  
LCD1  
J1  
REMOTE SENSOR  
RPM6938-SV4  
QNZ0450-001  
AM  
FM  
TUNER L/R  
S1 – S68  
COM1 – COM3  
TU1  
AM/FM TUNER PACK  
QAU0222-001  
REEL  
IC601  
LCD DRIVER  
LC75873NW  
REMOCON  
IC701  
LCDDA  
LCDCK  
LCDCE  
COMP OUT  
SYSTEM CONTROL MICON  
UPD178018AGC-603  
SEEK/STOP  
SD/ST  
SMETER  
IC71  
RDS DETECTOR  
SAA6579T-X  
KEY  
S601 S619  
KEY 0 – 2  
RDSDA  
RDSCK  
Tuner.Power AMP.Changer/System Controller  
LCD DRIVER/KEY SWITCH CIRCUT  
A
B
C
D
E
F
G
2-1  
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KS-FX922R  
Standard schematic diagrams  
Receiver & System control circuit section  
5
4
3
2
1
FM Radio Signal/Radio Main Signal  
AM Radio Signal  
Tape PB/Main Signal  
A
B
C
D
E
F
G
2-3  
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KS-FX922R  
KS-FX922R  
Mecha control circuit section  
5
4
3
2
1
Tape PB/Main Signal  
A
B
C
D
E
F
G
2-4  
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KS-FX922R  
LCD driver & Operation switch circuit section  
5
4
3
2
1
A
B
C
D
E
F
G
2-5  
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KS-FX922R  
SERVICE MANUAL  
CASSETTE RECEIVER  
KS-FX922R  
DISP  
DAB  
TP  
RDS  
PTY  
7
8
9
10  
11  
12  
MO  
Area Suffix  
Centeal Europe  
EX  
This model is KS-FX922RE EX that is added to the preceding model,  
theKS-FX922R E . Therefore the service manual for this model is  
consisting of Parts list only.  
For others, please refer to the service manual of KS-FX922R E (issue No.49596).  
No.49631  
Mar. 2001  
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COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.  
KS-FX922R  
Block No.M4MM  
Parts list(Accessories)  
P3-17  
Parts number  
Q'ty  
A
Parts name  
INST.BOOK  
(LANGUAGE)  
Iten  
EX  
E
A 2  
GET0017-002A  
(SPA,ITA,SWE,FIN)  
1
----------------------------  
VICTOR COMPANY OF JAPAN, LIMITED  
MOBILE ELECTRONICS DIVISION  
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan  
200103  
(No.49631)  
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