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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.
3-6. CONVERGENCE ADJUSTMENT
1. Input the dot pattern signal. Set CONTRAST to the position at which it can be seen clearly. Set BRIGHTNESS to MIN. 2. Align the R, G, B dots in the horizontal direction at the center of the screen using RV703 (H-STAT). Note: If H-CENT was changed after adjusting HSTAT, adjust H-STAT again. (The HSTAT can be changed by the H-CENT switch.) 3. Align the top and bottom of R, G, B at the center of the screen using the V-STAT (vertical static convergence) magnets. Note: After the V-STAT adjustment, always paint the magnets to lock.
I I' I I'
5. For VMC, use a 6-pole magnet to adjust so that the R and B dots are symmetrical above and below the G dot.
R (Top section) Fixed G B
(Bottom section)
6-pole magnet Perform the VMC adjustment by rotating the 6-pole magnet to the left and right without changing the opening of it.
Adjust so that the displacement of the dot is equal at the top and bottom.
A
B
A
B
6. Repeat steps 2 to 5 until the convergence becomes correct. Note: Adjusting the convergence may affect the landing. Therefore be sure to check the landing again after completing this adjustment. 7. After adjusting, paint each magnet to lock them.
14-inch
X
X
Y Good example
Y Bad example
V.STAT convergence magnet Purity BMC magnet
While maintaining the V-STAT magnet knobs A and B at the same angle (I = I'), adjust the top and bottom convergences. If A and B are asymmetrical (I = I'), it will have a negative effect; the focus may not be accurate, or the beam striking may occur. 4. For HMC, use a 6-pole magnet and adjust so that the R and B dots are symmetrical at the left and right sides in respect to the G dot.
I I' R G B
20-inch V.STAT convergence magnet
A
B A A'
Purity BMC magnet
6-pole magnet Perform the HMC adjustment by changing the opening of the 6-pole magnet.
Adjust the 6-pole magnet so that A = A'. While maintaining the I and I' angles equal, adjust the 6-pole magnet.
3-6
SIIA Chassis
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