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The purchased manual is an scan of the original Panasonic paper-based Service Manual. Unfortunately the contrast is not perfect, but I am satisfied anyway!
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The purchased manual is an high-quality scan of the original JVC paper-based Service Manual. The Service Manual includes the Owner´s Manual, so you do not have to buy both of them.
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It paid to find this Service Manual, couldn't find it anywhere else. Exactly what I wanted. Received within 24 hours.
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Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
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Excellent printing quality. A complete and very useful manual with all details.
The LCD will change as follows. Example: Test disc: TCD-782, DISC type select: CD-d, Judgement value: 7F, Measurement value: 3D BE.
switchover sequence is as stated below. Confirmation mode OFF -> Focus bias (FB) -> Tracking balance (TB) -> Tracking gain (TG) -> Tracking error offset (TEO) -> Focus gain (FG) -> Focus error offset (FEO) -> Confirmation mode OFF Example: Tracking error offset (TEO) Adjustment value: 03
Judgement value Measurement value *All numerical values are displayed in HEX What disc the IC has selected can be understood according to this judgment value. The decision standard of IC is as follow. LCD displays �CD-d� 0 < Judgment value < 10 10 < Judgment value < 32 32 < Judgment value < C8 C8 < Judgment value No disc CD-RW CD-DA and CD-R LCD displays �CD-r� No disc No disc CD-RW CD-DA and CD-R Tracking error offset (TEO) display Adjustment value *Adjustment values are displayed in HEX.
The state of the FE waveform can also be understood from this judgment value. 3. Confirmation of sled movement By pressing the F. SKIP or B. SKIP button continuously when all LCD light up, it is possible to transfer the pick-up to either the outer circumference or the inner circumference (the LCD is to remain all light up). 4. Confirmation of the RF level Test point: RF and VC (Vref) Test disc: TCD-782 Confirm that the RF waveform appears as shown below.
ADJUSTMENT
< TUNER SECTION >
1. DD converter clock adjustment Settings : � Test point : Q204 Collector � Ajustment location: TC208 Method : Set to AM603 kHz and adjust TC208 so that the test point becomes 360kHz. At 0.8Vp-p or greater 2. AM VT Check Settings : � Test point : TP1 (VT) Method : Set to AM 530kHz(AU,ALH), 531kHz(Other) and check that the test point is 1.0V ± 0.5V and set to AM 1710kHz(AU,ALH), 1602kHz(Other) and check the test point is 7.5V ± 1.0V(AU,ALH), 6.5V ± 1.0V (Other). 3. AM Tracking Adjustment Settings : � Test point : HP OUT (VOLUME MAX) � Adjustment location : BAR ANTENA................................600kHz(AU,ALH) BAR ANTENA................................603kHz(Other) TC801..............................................1400kHz(AU,ALH) TC801..............................................1404kHz(Other) * Repeat this adjustment a few times until the wave shape has the maximum amplitude. 4. AM IF Adjustment IFT803.........................................999kHz(Other) IFT803.......................................1404kHz(AU,ALH) 5. FM VT Adjustment(Lower side) Settings : � Test point : TP(VT) � Adjustment location : L801 Method : Set to FM 87.5MHz and adjust L851 so that the test point becomes 1.5 ~ 2.0V. 6. FM Tracking Adjustment Settings : � Test point : HPOUT (VOLUME MAX) � Adjustment location : L802................................................87.5MHz * Repeat this adjustment a few times until the distortion is minimum.
VOLT/DIV: 200mV TIME/DIV: 0.5us 5. Confirmation of tracking balance Test point: TE and VC (Vref) Test disc: TCD-782 Press the DSL button while the test disc is playing and confirm that the traverse waveform is as is shown below.
VC
VOLT/DIV: 200mV TIME/DIV: 2ms 6. Confirmation of each servo It is possible to confirm the adjustment value of each servo by repeatedly pressing the MODE button while the test disc is playing. The
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