Thank you very much for this Service Manual, it helped us a lot to repair the M-4318!
...BUT: The parts list is missing and the free parts katalog on web isn't complete, so now we don't know the part numbers of the defect parts :(
We had to build them out of a working machine, and need the numbers to reorder the missing parts now.
Great manual, thank you, sony kp46s3 service manual perfectly, i am very happy.
Text excerpt from page 18 (click to view)
AY-A184E AY-A244E AE-A184E AE-A244E
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 the PWB ass'y 1.
measure the secondary voltage of transformer.
Is the measure dvalue approx. 14.7 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 2.5A fuse down ? NO
