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There are currently no product reviews.
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Manual was a good representation of service infomation for the EWV404. It worked well for my repair.
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Great quality copy, right what I was looking for, all I need to fix my radio.
Thanks
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I BOUGHT A PAIR OF INFINITY VINTAGE SPEAKERS THAT REQUIRED TO BE REPAIRED AND THE ELECTRONIC TECHNICIAN ASKED ME FOR THE SERVICE MANUAL.
I TRIED TO GET IT AT THE MANUFACTURER'S SITE WITH NO SUCCESS, SO I STARTED TO LOOK FOR IT IN THE WEB FOR A LONG TIME, UNTIL I FOUND THE SERVICE MANUAL IN THIS EXCELLENT SITE "OWNER'S MANUAL.COM".
NOW I HAVE MY SPEAKERS WORKING AND ENJOYING THE MUSIC I LIKE.
THANKS TO "OWNER`S MANUAL.COM" I RECOMMEND THIS SITE TO EVERYONE.
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Very quick response. Very good and accurate print quality of the scanned document.
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The service manual was very usable and clear enough to see the individual values of all of the components (unlike some of the service manuals I have gotten in the past from web sites similar to this one). The price was right and the information was greatly appreciated. It helped me with an otherwise very difficult repair. It was much needed and appreciated. A faster turn around on my order would be nice, but I understand the constraints on your staff's time. Thank you for your service.
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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