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very helpful, I could not have cleaned motherboard and replaced the main fan without it
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Good manual, schematics nice and clear with good quality scanning. Woul dhave been nice to have immediate access after purchasing though.
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I was very glad recieving the service manal from You. Manuals were delivered promptly and were correct as advertised. A complete and very usefull service manual with all details. Thank you!
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Very clear copy. No pages missing. Big bonus is that it includes supplement. Price is affordable compared to what others ask for.
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Found the quality of the copy excellent and a very quick service. I would certainly recommend the service.
ELECTRICAL TROUBLESHOOTING GUIDE -11/17 3. Y/C CIRCUIT (3) When the C(Color) signal doesn�t appear on the screen in PB Mode,
Is 5.2VT/5.4VA applied to the IC301 Pins 24, 42, 55, 72, 91. YES Is the Color Rotary signal applied to the IC301 Pin 70? YES Is Color Rotary "H" about 3.4V? YES Does the Color signal appear at the IC301 Pin 25 ? NO Does the X301(4.43MHZ) oscillate? NO Replace the X301. NO Check the Color Rotary level. (Check the R303) NO Check the Color Rotary Circuit. (IC501 pin 99 ) NO Check the line of the 5.2VT/ 5.4VA Line. (Power Circuit)
YES
Does the Color signal appear at the IC301 Pin 21? YES
NO
Check the Color Pass.
Replace the IC301.
Replace the IC301.
-65-
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