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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.
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I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
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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
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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.
ELECTRICAL ADJUSTMENT
PRACTICAL SERVICE FIGURE
TUNER C.B
FFE801
3
< TUNER SECTION >
<FM SECTION> Signal to noise ratio: Distortion: (Input: 60dB) Stereo separation: Intermediate frequency: More than 62dB (at 98.0MHz) Less than 2.0% (at 98.0MHz) More than 22dB (at 98.0MHz) 10.7MHz
TP5
4
L772 TP1
L771
8
TC942 IC771 L981 L942 TP2 TP3 L941 TP4 TP6
<MW SECTION> Sensitivity: (S/N 20dB) Signal to noise ratio: (Input: 74dB) Distortion: Intermediate frequency: <LW SECTION> Sensitivity:
Less than 60dB (at 600kHz) Less than 58dB (at 1000/1400kHz) More than 36dB (at 1000kHz) Less than 1.5% (at 1000kHz) 450kHz
Less than 70dB (at 144kHz) Less than 68dB (at 198kHz) Less than 66dB (at 290kHz)
7
< TUNER SECTION >
1. Clock Frequency Check Settings: Method:
4
6
7. LW Tracking Adjustment Settings: � Test point: � Adjustment location: Method: Set to LW 144kHz and adjust L941 so that the test point becomes maximum. Then set to LW 290kHz and adjust TC942 so that the test point becomes maximum.
� Test point: TP2 (CLK IC771 pin30) Set to AM 1602kHz and check that the test point becomes 2052kHz±45Hz.
2. MW VT Check Settings: � Test point: TP1 (VT) Method: Set to AM 1602kHz and check that the test point is less than 8.0V. Then set to AM 531kHz and check that the test point is more than 0.6V.
3. MW IF Adjustment Settings: � Test point: TP5, TP6 L772 .............................................. 450kHz 4. MW Tracking Adjustment Settings: � Test point: TP5, TP6 � Adjustment location: L981 (1/3) Method: Set to AM 999kHz and adjust L981 so that the test point becomes maximum. 5. FM VT Check Settings: � Test point: TP1 (VT) Method: Set to FM 87.5MHz, 108.0MHz and check that the test point is more than 0.5V (87.5MHz) and less than 8.0V (108.0MHz). 6. LW VT Adjustment Settings: � Test point: TP1 (VT) � Adjustment location: L942 Method: Set to LW 144kHz and adjust L942 so that the test point is 1.3V±0.05V. Then set to 290kHz and check that the test point is less than 8.0V.
8. DC Balance/Mono Distortion Adjustment Settings: � Test point: TP3, TP4 � Adjustment location: L771 � Input level: 60dB Method: Set to FM 98.0MHz and adjust L771 so that the voltage between TP3 and TP4 becomes 0V±0.04V. Next, check that the distortion is less than 1.3%.
35
36
 $4.99 AVD35 AIWA
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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