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This service manual helped me to repair my PIONEER. Iam very satisfied, that I found it here.
Even the price of manual was not so high that person would not be able to spend a few money.
But that is very worth spent money. Thanks
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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!
TROUBLESHOOTING GUIDE
DOES NOT LIGHT ON DISPLAY
Is the voltage at pin 1 and 2 of V651 about -11V?
No
Check FILAMENT(+) line of POWER BLOCK.
Yes
Is the voltage at pin 31 and 32 of V651 about -13V?
No
Check FILAMENT(-) line of POWER BLOCK.
Yes
Is the voltage at pin 13 of IC651 about 5V?
No
Check AT+D5V line of POWER BLOCK.
Yes
Is the voltage at pin 30 of IC651 about -18V?
No
Check -20V line of POWER BLOCK.
Yes
Replace V651 or IC651.
D-3
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