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 481 (click to view)
6-1-6. AT Head Height Check and Adjustment
Check 4. Turn the Power On
. Alignment tape : SR2-1/SR2-1P (00:00 to 15:00)
5. Play Back the Alignment Tape Play back the SR2-1/P (0:00 to 15:00). 6. Check the AT Head Height (1) Check that the level of CH-2 remains unchanged when portion A of the tape is lightly pushed downward. If the level is changed, perform steps 7 and 8. (2) Check that the level of CH-2 decrease when portion B of the tape is lightly pushed up. If the level increase, perform steps 7 and 8.
<PB LTC output waveform> B AT head TG-3 (Exit guide) A
CH-2 (PB LTC)
Spec.1 : Level remains unchanged by pushing the tape downward. Level decreases by pushing the tape upward.