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Very fast and perfect delivery. Clear and well scanned. A lot of work professionally realized.
Again thak you a lot
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This manual is accurate and of high quality. It is only volume 2 of the service manual. This is schematic, parts lists, and exploded mechanical drawings. The theory of operation and the diss-assembly instructions are in volume 1. The unit can be tricky to dis-assemble portions of so the volume 1 manual can be important. The product description of the manual is accurate but it does not say anything about volume 1 and the image of the front page does clearly say Volume 2.
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Wellll again thank you very much fast and effective. Clear and well done for such an old TV!!!!
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It has all the information you will need to fix it. The main circuit diagram is only A4 but being a PDF, you can print it to any size - I did it on two sheets of A3 and it didnt lose any detail - just made it readable when pinned up above the bench. I've found the fault, just need to buy some obscure bits to get it going again!
I cant fault the process, I paid for the manual in the morning and it was ready to download by lunch time.
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Very good copy in a 54 pages PDF archive. This is my sixth purchase here. :)
7 Troubleshooting
7-2-14 ABL Failure
Symptoms : � Full white luminance is too bright. (ABL minium is over 35 F/L) � Full white luminance is too dark. (ABL maximum is under 35 F/L) � The luminance of full white and No Video are almost same.
Display the full white pattern.
Check connections between CN202 and CN202_2.
No
Does full white luminance vary, adjusting ABL step with Softjig? Yes
Yes
Are full white and white square luminance almost same? No
Does the PWM duty of IC202�s Pin 21 vary adjusting ABL step? No Check and replace IC202 and around parts.
Yes
No
Is R121 right as CRT�s differential items? Yes
Replace R121 to higher or lower one that meets the spec.
Replace it.
Does the voltage of IC101�s Pin 8 vary between full white and No Video?
F/W: 4.1~4.3V No Video: 5.3~6.0V
Yes Check and replace IC101.
No Yes Check and replace D518, IC101.
Does T501�s Pin 8 voltage vary between full white and No Video?
F/W: 1.5~3.0V No Video: 5.5~7.0V
No No
Are 12 V line, R504, L504, Q501 and Q518 ok? Yes Are C509, D514, Q502 and Q506 ok? Yes Check and replace T501 and CRT.
Replace it.
No
Replace it.
7-16
CHA42*7L/5**7L
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