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/
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!
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.
Great manual very clear copied. You are making an incredible job. I appreciate a lot the rapidity and your efficiency. Thanks a lot
Text excerpt from page 26 (click to view)
KD-SC800
3.2.5 Signal processing section
Is the sound output from both channels (L, R)? YES Normal
NO
No sound from either channel. YES Is 9V present at IC101 pin (8)? YES Is the audio signal (including sampling output components) output to IC521 pins ^and | during YES Is the audio signal output at IC101 pins 1 and7during playback? YES Check the muting circuit.
NO
Compare the L-ch and R-ch to locate the defective point. YES
NO
Check the vicinity of the Q981 audio power supply.
