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I was very glad recieving the service manal from You. Additionaly very fast. Extremaly nice servicing. Thanks very mach! Now my GX-220 working better, than it was made. Alexander from Moscow, Russia/
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Sweet! I won the item on eBay and couldn't adjust the geometry or even keep a steady picure. This guide has the full schematics (not available anywhere else as far as I could tell), and was a bargain for the wealth of knowledge it contains. I hooked it up to my testing equipment, tweaked a few potentiometers and got it playing videogames in no time. Thanks!
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It was just what I need to fix my old BMW's CD player. Very convenient also. Thank you.
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Great Manual! It contains all the wiring schematics and mechanical exploded views that are essential for service and repair. I was surprised I even found this for such an old machine. Only wish I knew of this site many years ago.
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Great manual very clear copied. You are making an incredible job. I appreciate a lot the rapidity and your efficiency. Thanks a lot
FM (TUN101)
Check the +12V input of TUN101 B+ 6 Check the 12V of Q102 �E� YES YES Check the �LOW� of IC103 Pin 7 Check the �High� Voltage of TUN101 VT 5 YES Replace the Q102 Replace the TUN101 NO Refer to �IC103 Troubleshooting� NO Refer to �Power Circuit Troubleshooting�
YES
Check the OSC waveform of TUN101 Pin 8 YES Refer to �IC102 Troubleshooting� Replace the TUN101
IC102 Troubleshooting
Check the power supplying to pin8 NO YES Refer to �Power Circuit Troubleshooting�
Check the waveform of Pin 20, 21 NO YES Check the waveform output of Pin 16, 17 NO YES NO YES END Replace the IC102 Refer to �IC103 Troubleshooting� Check the �Low� of Pin 13 Check the FM(TUN101) & AM(L107) NO Replace the IC102
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