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There are currently no product reviews.
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Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this tuner.
;
I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
 ;
It is pretty good. The schematics were covered all components, the manual also provide the parts list . It's useful for the trouble shooting.
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Very fast service, best quality of the service manual and the schematics
;
This service manual of the old video cassette recorder VT-LC50EM is very good readable even the tiniest numbers (i.e. IC-pins). The circuits are very clear. Many details of the schematic are very good described but in GERMAN language. Many schematic details - but complete at all. Common background information of several details are enclosed and physical knowledge of the TFT liquid crystal display for example. The manual lacks PCB drawings. If you understand german I would recommend this manual for you.
ADJUSTMENT
<TAPE PLAYER SECTION>
A MAIN C.B
6
8
8
6. Tape Speed Adjustment Settings : � Test tape :
TTA�100
SFR 1
D C B A
(TAPE CENTRE) � Test point : Phones Jack (J1) � Adjustment location : SFR1 � Tape/radio : TAPE � S-BASS : OFF � Volume : NON-CLIP Method :
VR1
* *
(MAX -10dB ) Play back the test tape and adjust SFR1 for 3000Hz ± 10Hz. Then confirm WOW is less than 0.50%.
42
VOLUME
L102
5 3
VC101
TP1(VT) * * L103
7. Azimuth Adjustment Settings : � Test tape : � Test point : � S-BASS : � Tape/radio : � Volume : � Adjustment location : Method :
PHONES
TTA�330/TTA�420 Phones Jack (J1) OFF TAPE MAX Head azimuth adjustment screw Play back the 8KHz signal of the test tape and adjust the screw so that the output becomes maximum.
L105
J1
4 3
L101 (BAR-ANT) P HEAD
1
6
7 FWD
NOTE : * : On the other componets side.
8. Maximum Output Power Adjustment Settings : � Test tape : TTA�210 � Volume : MAX � S-BASS : ON Method : For <YU, YL> : � Short the shorting point B and C only. For <YZ> : � Short the shorting point B and C . � If output is less than 1.2mW(0.14V), short the shorting point A and D . � If output is more than 3.9mW(0.25V), open the shorting point B and C and short the shorting point A and D .
<RADIO SECTION>
1. AM IF Adjustment L105 ....................................................................... 450kHz 2. AM VT Check Settings : � Test point : TP1 (VT) Method : Set to AM 530kHz and check that the test point is more than 0.8V. Then set to AM 1710kHz and check that the test point is less than 8.7V. 3. AM Tracking Adjustment L101 ....................................................................... 630kHz VC101 .................................................................. 1440kHz 4. FM VT Adjustment Settings : � Test point : TP1 (VT) � Adjustment location : L103 Method : Set to FM 76MHz and adjust L103 so that the test point becomes 1.0V ± 0.1V. Then set to FM 108.1MHz and check that the test point is less than 8.5V. 5. FM Tracking Adjustment L102 ..................................................................... 76.0MHz
31
IC101
32
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