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Thanks for this "hard to find" service manual. This Sony PS212A is a very good turntable that needed to be restored !
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Excellent quality on these manuals. Same as having the original printed manual and incredibly useful when doing a custom install like me. Keep it up on the good work.
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This is an excellent information source. Great quality and tons of info regarding technical service for the Technics SH8065.
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5 stars on this manual since it is the complete version, not the half manual you find free for download all over the web. Good job.
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Thank you very much you are helping me a lot with my preferred hobby!!! this manual of an old TV is going to be very helpful!!!!
You are very honest competent great job very clear and well done!!!!
Matteo
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6. ADJUSTMENT
[Purpose]
If the combination of MAIN Assy and LOADER Assy is changed, the adjusted value for LD power will be shifted, and stable playback or recording of a disc will become impossible. Therefore, when the combination of MAIN Assy and LOADER Assy is changed, LD power adjustment and adjustment for disc judgment will be necessary. Be sure to do this adjustment at following cases. � When replacing MAIN Assy � When replacing LOADER Assy
[Tools to be used]
� Special tool for adjusting the LD power (GGF1559) � 10-pin FFC flexible cable (GGD1477) � CD-ROM test disc: CDT-313 (GGV1054) � DVD dual-layer test disc: DVDT-002 (GGV1036)
A
[Notes]
Never turn the power off while any of the following operations is in progress: � While laser diode (LD) power adjustment is being performed normally by the unit � While adjustment for disc judgment is being performed
B
[Connections]
� Connections for adjusting the LD power
Special tool for adjusting the LD power
POWER SUPPLY Unit HDD
C
Main Assy and writer
Note: Before adjusting the LD power, disconnect the power to the HDD and the flexible cable for ATA (40-pin). � To which the special tool for adjusting the LD power is connected
The right side (see the figure below) of the connector is for connection of the flexible cable. CN5601
D
Main Assy
CN1402 CN1401
Special tool for adjusting the LD power
Connect the 10-pin flexible cable to the lower part of CN401.
� Setting of the switches on the special tool for adjusting the LD power
E
ON ON ON ON ON
Set all five switches to ON.
F
DVR-640H-AV
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