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This service manual was determinant to enable to fix my Alpine Amplifier. I am pleased with my purchase. For a 5 star rating I would like to see a higher resolution scan of the printed circuit board lay-out because the gray scale grafics was dificult to see. Also some schematic diagrams were scanned at a slight angle. Never the less, it had all information I needed to troubleshoot and service my equipment.
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Complete manual, the good quality of reproduction allows enlarged print-out of the schematic diagram in the size it probably had in the original print edition and which is necessary for practical use.
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The service manual was complete and the components on the drawings very good visible.
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downloaded next day , manual is very helpful , fast and easy
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This Service Manual was exactly what I needed to repair my Philips TV. The purchase was convenient and I received the manual at the same day I paid for it.
< TUNER SECTION >(HR,HT)
1. Clock Frequency Check Settings : � Test point : TP2 (CLK) Method : Set to AM 1602kHz and check that the test point is 2052kHz ± 45Hz. 2. AM 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. AM Tracking Adjustment Settings : � Test point : TP6(Lch), TP7(Rch) � Adjustment location : L981(1/3) ........................................ 999kHz Method : Adjust L981 (1/3) so that the output becomes maximum.
< DECK SECTION >
1. Tape Speed Adjustment Settings : � Test tape : TTA�100 � Test point : SP�OUT 2V � Adjustment location : SFR1 Method : Play back the test tape and adjust SFR1 for 3000Hz ± 5Hz (FWD) and FWD PLAY speed ± 45Hz (REV).
2. Head Azimuth Adjustment Settings : � Test tape :
TTA�300
Method :
� Test point : SP�OUT 2V � Adjustment location : Head azimuth adjustment screw Play back the 8kHz signal of the test tape and adjust screw so that the output becomes maximum. Next, perform on each FWD PLAY and REV PLAY mode.
4. FM VT Check Settings : � Test point : TP1 (VT) Method : Set to FM 108.0MHz and check that the test point is less than 8.0V. Set to FM 87.5MHz and check that the test point is more than 0.5V. 5. FM Tracking Check Settings : � Test point : TP6(Lch), TP7(Rch) Method : Set to FM 98.0MHz and check that the test point is less than 9.0dBµV. 6. AM IF Adjustment Settings : � Test point : TP6(Lch), TP7(Rch) � Adjustment location : L772 ................................................ 450kHz Method : Adjust L772 so that the output becomes maximum. 7. DC Balance / Mono Distortion Adjustment Settings : � Test point : TP3, TP4 (DC Balance) TP6(Lch), TP7(Rch) (Distortion) � Adjustment location : L771 � Input level : 60dBµV 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%
3. PB Frequency Response Check Settings : � Test tape : TTA�320 � Test point : SP�OUT 2V Method : Play back the 315Hz and 10kHz signals of the test tape and check that the 10kHz signal with respect to that of the 315Hz signal is 0dB ± 3dB. 4. REC/PB Frequency Response Check Settings : � Test tape : TTA�602 � Test point : SP�OUT 2V Method : Input a �20VU signal to the AUX terminal. Record the 1kHz and 10kHz signals on the test tape and play back them. Check that the difference between the record level and the play back level at 1kHz and 10kHz signal is 0dB to ± 3dB.
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