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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.
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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.
ADJUSTMENTS IMPORTANT NOTICE
Do not attempt to adjust the following service adjustments except when adjustments are required in servicing otherwise it may cause loss of performance and product safety. + B VOLTAGE ADJUSTMENT 1. Receive white raster pattern. 2. Set controls to normal. 3. Connect digital voltmetre to test point TP-B and GND. 4. Adjust voltage to 130 ±0.5V by using VR641.
DRIVE ADJUSTMENT 6. Select item no.3 �REGULAR 3, GRY� (G-Drive) or 4 �REGULAR 4, GRY� (B-Drive) and adjust both initially to 3F. 7. Change data value of each item by using LEVEL + or LEVEL - button to obtain the proper white balance. PCC ADJUSTMENT
AGC ADJUSTMENT 1. Connect digital voltmetre to test point TP-A and GND. 2. Using the CS button, input and tune an RF signal which is UHF to the clearest station. 4. Press the LEVEL+ or LEVEL - button to adjust voltage to be 3.2Vdc. 5. Enter to the service mode and select mode �REGULAR�, and select item no.1 �REGULAR 1, AGC�.
PCC ADJUSTMENT 1. Receive cross hatch pattern and set screen mode to �FULL�. 2. Enter to the service mode and select mode �WIDE�, and select item no. 7 �WIDE 7.P PCC�. 3. Press the LEVEL+ or LEVEL - button to adjust the vertical line to be straight.
FOCUS ADJUSTMENT By using FOCUS VR, adjust focus control for well defined scanning lines. TRAPEZOID ADJUSTMENT 1. Receive cross hatch pattern and set screen mode to �FULL�. 2. Enter to the service mode and select mode �WIDE�, and select item no. 8 �WIDE 8.P TRP�. 3. Press the LEVEL+ or LEVEL - button to correct the trapezum distortion of the vertical line.
GREY SCALE ADJUSTMENT SCREEN ADJUSTMENT 1. Receive black & white pattern. 2. Enter to the service mode and select mode �REGULAR�, and select item no. 2 �REGULAR 2, CUT�. The horizontal line will appear on the screen. 3. Using the numeric buttons shown set each colour to minimum by decreasing to the point where any further decrease resets the adjustment to maximum value. 4. Set the SCREEN VR for one colour to be just visible. BIAS ADJUSTMENT 5. By using the buttons 1, 2, 4, 5, 7, 8 on the remote control, adjust the line to be white. The key allocation is as follows;
Button No. Operation 1 Increase Red 2 Decrease Red 4 Increase Green 5 Decrease Green 7 Increase Blue 8 Decrease Blue
-10C2KTV
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