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Awesome manual. Complete diagrams of all board assemblies as well as how to get to each part of the t.v. down to the individual screws and their locations. Get it.
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perfect copy, im very satisfied, i was need the diagram over the powersupply and
the copy was very sharp
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This is exactly the service manual I needed.
Complete with all schematics, partslists, PCB layouts and alignment instructions.
This manual covers both the T-4970 en T-488F Onkyo tuner.
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IF PRINTED CIRQUIT BOARD WIRING VIEW WAS ONE TONE LIGHTER, THEN 5 STAR RANK HAS TO BE MY CHOISE.
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Very usefull, good quality drawings !
Muito útil encontrei todas as informações necessárias.
FM(TU101) TROUBLESHOOTING
Check the 10V input of TU101 Pin 6
YES
Check the 10V of Q102 "E" YES NO
Check the Power circuit
Check the "High" of TU101 Pin5
Check the "LOW" of IC103 pin7
YES
NO
YES
NO
Refer to "IC103 Troubleshooting"
Replace the Q102
Check the OSC waveform of TU101 pin8 YES NO
Refer the TU101
Refer to "IC102 Troubleshooting"
IC 102 TROUBLESHOOTING
Check the Power input of IC102 pin8 YES NO
IC903,D105,D106 Check
Check the waveform of IC102 pin20, 21
YES
NO
Check the FM(TU101) ,AM(L102)
YES
Replace the IC102 Check the waveform of IC102 pin16, 17
YES
NO
Check the "LOW" of IC102 pin13 Refer to "IC103 Troubleshooting"
YES
END
NO
Replace the IC103
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