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 10 (click to view)
TEST MODE
This model has a test mode function in the disassembled condition.
Screw
TP701 Screw
TEST
1. How to use the test mode: � Short the test land in the MAIN C.B. � Auto-stop function is not detected by micro-computer while test mode is active. Note: Make sure that the test land is opened after the test mode is de-activated. (Auto-stop function is not available with shorted land condition.) 2. How to disassemble the circuit board. � Removes the soldering part in the MAIN C.B (with the � Removes two screws. mark).
