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!
It was just what I need to fix my old BMW's CD player. Very convenient also. Thank you.
Text excerpt from page 9 (click to view)
ADJUSTMENT
<TAPE PLAYER SECTION> 1. Tape Speed (4.8cm/sec) Adjustment Settings : � Test tape : TTA - 100 (TAPE CENTER) � Test point : PHONES JACK (J101) � Adjustment location : SFR 401 � Super bass : OFF � Volume : MAX Method : Play back the test tape and adjust SFR 401 so that the frequency is 3010 Hz ± 10 Hz (FWD) and FWD SPEED ± 50 Hz (REV). Then confirm WOW is less than 0.52%.