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Rapid, clear well done as all the scheme I downloaded from this site. Great job very functional and very useful
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Great copy of the manual, has all information required for servicing,
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I work at an authorized service center and I can tell if a manual is as it should be. This one is. It may be a scan, but a very good one at that. The interesting part for me was the curcuit diagram which was scanned at high quality, making it as good as the original. I will definitely be back as a customer. I need not say this, but I will: the price was the best. Thank you owner-manuals.com .
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really a very good manual even sometimes the quality is no so good as before still very readible and very very useful!
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FAST very good and clear a great unexpensive job!!! very recomended for all people who are preofessional or hobbists as me!!!!!!
ELECTRICAL TROUBLESHOOTING GUIDE
1.Power Check Flow Power switch on
Amber LED ON?
NO
5V is Right ?
NO
Check S1 and its cable Check F901 Check the standby Transformer Check IC1 on the standby board
YES
YES
Press the standby button
Check the MCU on the keyboard Check U84 and Q82 Check the D81
Hear the relay�s click?
NO
Check the MCU on the keyboard Check Q91 Q92 and OP91 Check if the main transformers has been plugged in
YES
Check F902 and F903 Check the main transformer Check B603 B604 B703 B704 Check D602 D603 D702 D703 Check PSU PCB
+/-70V un-regulated power supply is correct?
NO
YES
+/-20V power supply is correct?
NO
Check R648 R649 R748 R749 Check B605 B705
Check IC603 IC604 IC703 IC704 Check the PCB track
YES
+/-18V power supply is correct?
NO
Check the sockets and plugs Check 1Q21 1Q22 2Q21 2Q22
YES
A
3-2
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