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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.
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GOOD SERVICE MANUAL.I ALWAYS BUY THERE IF I FIND WHAT I AM LOKING
5
6
7
8
NO DIGITAL AUDIO ON PLAYBACK OF COAXIAL JACK
A
Is there waveform at pin 2 of J8102 about 0.5Vp-p?
Yes
Check connection at RCA Cable.
No
B
Is there Yes waveform at pin 215 of IC4002 about 3.3 Vp-p ?
Check Q8103 and peripheral circuit.
No
Change IC4002.
C
NO ANALOG AUDIO ON PLAYBACK
Yes Is there AUDIO signal at pins 7 and 8 of IC8003 ? Check J8001 and peripheral circuit.
D
No
Is there waveform at pins 1,2 and 3 of IC8003 ?
Yes
Is there voltage at pin 6 of IC8003 about 5 V ?
No
Check AT+5V
E
No
Yes
Change IC4002.
Change IC8003.
F
DV-610AV-S
5 6 7 8
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