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Fully functional usable service manual. Considering the age of the manual and device quality was better than expected
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Thank you very much, I've been very happy to find this manual on "Owner Manual". It's a perfect copy and it has been really useful for my work!
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It took about 24-hours after my payment before I was able to get to the download. Apparently, payment processing is not 100% automated. That is no big deal, just be aware of that going in.
After I got to it, it was in good shape, easy to read, etc. Not some cheap FAX copy looking thing.
Also, this site was the cheapest I found. Another Plus!
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Good price, very legible manual, exactly what I needed -- but had to wait a day to actually get the download of the manual. Would have preferred to download it immediately after payment rather than waiting for someone to "process" my order. I was surprised that I had to wait that long.
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As the only source for this manual it rather rank quite high since it is well scanned and perfectly readable.
5-2. PRINT IS TOO DARK OR TOO LIGHT
START
Is voltage (approx. 5.7 V) at pin 4 of IC6 on MA-91 board output when "CONTRAST"is set as center value?
NO
IC203 and IC201 or peripheral circuit of Q16 on MA-91 board are defective.
YES
Is voltage (approx. 1.4 V) at pin 6 of IC6 on MA-91 board output when "BRIGHT" is set as center value?
NO
Peripheral circuits IC203 and IC201 or Q15 and Q17 on MA-91 board are defective.
YES
Is voltage (approx. 1.5 to 2.5 V) available atpin 78 of IC505 on MA-91 board when head is at the normal temperature? YES
NO
Peripheral circuit IC404 and pins 15 and 16 of CN202 line on MA-91 board, or the thermistor in the head are defective.
Are the required voltages available at each terminal, 3 V at 19 pin of IC6 and IC7 on MA-91 board, and 1 V at 23 pin of the IC's? YES
NO
Peripheral circuit Q21 on MA-91 board is defective.
Is density of stair step printed in test mode properly?
NO
The head voltage or connecetor CN202 line on MA-91 board is defective.
YES
The data buses of IC7 and IC8, data buses of IC602 and IC603, or peripheral circuit IC2 on MA-91 board are defective.
5-2
UP-980(UC) UP-980CE(CE)
 $4.99 UP-980 SONY
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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