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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!
2. SCREEN
1) Receive the Retma pattern and heat run over 15 minutes. 2) Adjust the �R, G BIAS, R, G DRIVE� to 0, �B BIAS� to 127, �B DRIVE� to 32. Adjust the screen volume that the Retma pattern reach to the cut-off point.
3. WHITE BALANCE
1) Receive the Full white pattern and heat run over 15 minutes. 2) Adjust the picture control at the point �Y� value of white balance instrument in 20cd/. 3) Enter the service mode. 4) Adjust �R BIAS, G BIAS� to x=288, y=301. 5) In order to exit the service mode power off the TV set and power on. 6) Set the TV set to �Normal I� mode(20/21 inch) or set to �Normal II� mode(14 inch) 7) Enter the service mode. 8) Adjust �R DRIVE, G DRIVE� to x=288, y=301. 9) Repeat above process until the white balance value to x=288, y=301, Y=20, x=288, y=301, Y=200(approximate) in 2) � 8).
4. FOCUS
1) Apply a RETMA PATTERN signal. 2) Adjust the Focus Volume on FBT to obtain optimal resolution.
5. AGC
1) Set the pattern Generator with RF LEVEL = 60dBuV 100% FULL COLOR BAR 2) Connect the pattern generator RF output to tuner RF input. 3) Connect the probe of oscilloscope in AGC pin of tuner. 4) Adjust the AGC point to MAX � 1V. (Simple Method) 1) Receive the pattern. 2) Locate the cursor in �AGC� and adjust using the �VOL +� or �VOL �� keys. 3) Adjust the point there is no noise in about 60dBuV and no beat in about 90dBuV.
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