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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.
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Wanting to repair a neighbours tape recorder I needed the necessary information, it makes it easier. Although the service manual is described as "Language : English" To my dismay I found that it is entirely written in German, a language I do not understand. At least I now have the schematics which will help of sorts. I may not use this service again due to the laguage difficulty after all when it states English you do not expect it to be entirely in another language.
4-6. AUDIO CIRCUIT (HI-FI)
A. TROUBLESHOOTING OF EE MODE.
No sound in the EE mode
Is +5V supplied to the pin 8, y of IC251? YES
NO
Check the Power circuit.
Is +5V supplied to the pin I of IC251? YES
NO
Is signal input into the in !, @ of IC251 in TV mode? YES
NO Check the PIF circuit.
Is signal output at the pin E, e of IC251? YES
NO
Are the clock and data supplied to the pin %, ^ of IC251? YES
Check the JK601 (RCA JACK) or JK602 (SCART JACK) adjacent circuit.
Check the SYSCON
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