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document which does not send me crazy trying to figure out the blurry text of a bad copy.
Very well done, Thomas.
This manual is very well presented and after printing out looks about as close to an original as I think you can get. The quality is second to none.
The content of the manual is comprehensive and I think it would be well suited to an audio repair professional which I'm not but I did find it very informative and helpful.
The cost of the manual is more than covered by the money I'll save when I change the keep memory battery now I have the relavant info.
Very pleased with my purchase and can recommend it wholeheartedly as I can other manuals I've downloaded from this site.
Complete manual including mechanical part in good pdf quality. Shaded greys of the pcb due to pdf not perfect but usable.
Nice pdf file of the manual sent promptly. Thanks.
Complete MFG Service Manual at a good price FAST !
â¢ Playback can only be performed when a disc is loaded.
Is the Focus servo active? (Can you hear it working?) No Yes
Check the laser diode driver. Check the area around IC801(16) - (21) (focus servo circuit).
Yes Does the DRF signal change from "L" to "H"? No Yes Yes Is HF waveform normal (see the Fig. 28-1, 2)? Yes Check the tracking system. Waveform is unstable. No
Level is abnormal.
If the disc is not turning, the DRF should not change to "H".
Check the spin system.
Check the periphery of IC801 pins 41 and 42. Yes
Check the spin system.
HF 0.1V/DIV 0.5Âµsec/DIV(DC) IC801 41 (When playing back the disc)
0.5s 1.00 V IC801 16 FD 0.5s 10.0 V IC801 12 CLV+ 0.5s 10.0 V IC801 54 DRF 0.5s 2.00 V IC801 7 TE
Waveform in case of normal playback
2 1 3 4
Figure 28-1 â¢ Check the tracking system.
Check waveform of IC801 pin 7 (TE).
The waveform shown in Fig. 28-3 appears, and no-disc state appears soon.
Tracking servo is inoperative.
Check the periphery of IC801 pin 8 to pin 15, and IC803 to BI801/CNS801.
Play is possible in TEST mode.
The unit will be initialzed in Normal mode, but Yes it will not play back.
Normal jump is impeded, and the program top cannot be reached.
Check the periphery of IC801 pin 14.
Data cannot be read.
5ms 1.00 V IC801 7 TE
Check the VCO-PLL system.
5 ms 5.0 V IC801 54 DRF
Figure 28-3 â 28 â