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SONY UP-980
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY UP-980 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 60 (click to view)
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)

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