This scanned manual is well done in that most all the pages except for one is straight and clear- the way I would do them. One page was upside down but that happens. For the money that is charged on this site you get a pretty good deal. Now with complex repairs, I still prefer to us paper manuals which I have to buy at stereomanuals but the one I got here was much less than the $45 he was charging but this is a larger than normal manual for three different units. I am a picky manual user because I have used original manuals from Sony and Teac.
Acurate informations inside the SM and I could repair my old Sansui SC-3330 without any problems. Thanks.
Text excerpt from page 13 (click to view)
AH-A07CR AH-A09CR AH-A12CR
TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT
The machine does not function at all with remote controller and switches on the indoor unit.
Using a tester, measure the voltage between anodes of D1 and D2 on PWB ass'y.
measure the secondary voltage of transformer.
Is the measured value approx. 17.0 Vac ?
NO
YES Replace the PWB with a new one. YES Replace the fuse and varistor with new ones. Replace the ftransformer with a new one. Is the 3.0A fuse down ? NO