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Excellent quality service manual. Quick processing, fair prices. Love to do business again. Thank you!!!
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Excellent service manual, the only known point of note is the alignment of improvability scanned pages within the pdf page. The resolution is good.
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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.
TROUBLE SHOOTING GUIDE
E-2. PREAMP IN THE PAYBACKMODE
Is signal from heads fed to pin1 and 3 of P401?
YES NO
Check the DRUM and DECK mechanism
Is ON/OFF5V from pin76 of IC301 supplied to pin131 of IC401 at 5V?
YES
NO
Check the ON/OFF 5V
Is REC(H) from pin79 of IC501 supplied to pin11 of IC401 at 0V?
YES
NO
Check Q503, Q504 and adjacent circuit
Is V.SW pulse from pin46 of IC501 supplied to pin4 of IC401?
YES
NO
Check SERVO/SYSCON
Is the signal from pin1 and 3 of P401 fed to pin17 or 19 of IC401?
YES
NO
Change IC401
Is the signal from pin7 of IC401 fed to C416?
YES
NO
Check Q401 and adjacent circuit
TO LUMINANCE SIGNAL IN THE REC MODE
NOTE : 1) REC(H) : "HIGH" in the REC mode. "LOW" in the EE and PB mode
19
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