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Great service. Fast response. High quality scan. Good price.
Thank you very much!!!
Oleg S.
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Well-scanned, complete manual. Contains the information needed for repair and maintenance.
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It's great to be able to obtain a precious technical information for a real old equipment. The one I got helps me a lot in the area of wiring diagram to repair my antique. PDF gave me clear enough information to find out thr details. Thanks for giving me the oppotunity to be able to access to almost vanished informations.
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Another excellent aquisition. Fine detailed manual. Thanks
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Good quality for the scan, complete, but as usual for Tascam, not so comprehensive !
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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