|
|
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
Thanks for this "hard to find" service manual. This Sony PS212A is a very good turntable that needed to be restored !
 ;
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.
;
This is an excellent information source. Great quality and tons of info regarding technical service for the Technics SH8065.
;
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.
;
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
Diagnostic Software, Trouble Shooting and Test Instructions 5.3
5.3.1
DVD640 /xx1
5.
EN 17
Fault Finding Trees
No Operation
The player does not operate No OSD and FTD display No pix and sound
Put the Mains switch to ON
� Check Power supply +5V and +/-12V to the Mpeg board
NO
� �
Check supply voltages at connector 1202 Pin 1&3 è +5V è Pin 5 +12V Pin 7 è -12V Check / Replace cable connection to con 1202 Check / Replace Power Supply Unit
YES
Check Power supply +3V3 and +2V5 to IC 7101 board
NO
� �
Check / Replace safety resistor 3200 Check / Replace 3V3 regulator 7206 and transistor 7220
YES
ch1 ch2 RESET
1 T
Check RESET signal at pin 24 / 7101 and pin 12 / 7100
NO
� �
Check +5V supply to IC 7230 Check / Replace RESET IC 7230
2
YES
� � � � � Check +5V supply voltage to IC 7104 Check / Replace IC 7104 Check / Replace crystal 1153 Check / Replace C2140 and C2141 Check / Replace resistor 3145,3146,3147 3148 and 3150
2V / div DC 20ms / div
27MHz CLK ch1
Check 27MHz clk input at pin 105 /116 /117 of IC 7101
NO
1
YES
ch1
Check SDRAM CLK 108MHz at pin 38 / 7102 �
1V / div DC 50ns / div
SDRAM CLK
ch1:freq=108MHz
NO
� �
Check +3V3 supply voltage to IC 7102 Check / Replace resistors 3171 Check / Replace processor IC 7101
1
Note: There should be mechanical
YES
ch1
PM3380B
Fig A
T
1V / div DC 10ns / div
Measure waveform at pin 16 of Flash IC 7100 at Power-on and the waveform should look like in Fig A: � During initialization �waveform appear for 1 sec and go low for next 1 sec. � After start-up-continuous waveform.
1
1.00V / DC 200ms / div
�
Is the waveform present ?
NO
� � � � �
Check +3V3 supply voltage to IC 7100 Check / Replace jumper 4109 Check / Replace Flash IC 7100 Check HSYNC at pin 10 / 7301 Check +5VAV supply to IC 7301 Check / Replace Video DAC IC 7301
YES
� Check / Replace processor IC 7101
CL 26532068_024.eps 100702
Figure 5-1 No operation
|
|
|
> |
|
