Repair procedure: boot normal, functioning properly, the input signal indicating, measuring standby voltage, operating voltage are normal. Enter a valid audio signal conditions, measurement decoder output and channel signal waveform normal. Pull-in operation a/b output did not hear relays voice, shows that the fault output relay no action.6j6service manual download site
6j6service manual download site
Relay output no for two reasons, one is the operating voltage is not, second, control voltage: no, control voltage is divided into protective and control out of control circuit is out of control. Measuring relays operating voltage 24 Vac, measured about 5 volts, found after cleaning circuit 24 volt power supply resistor R105 serious welding, welding of system tests are normal.6j6service manual download site
6j6service manual download site
YAMAHA brand for the Chinese people should be most familiar audio brand, building the Yamaha motorcycle, Yamaha and Yamaha acoustic piano, in fact, little is known about Yamaha first started as a musical instrument. In entering the Chinese market in @# of this brand, what are Ya Ma holds the larger markets especially in home audio, particularly AV amplifier, and TL have always been a feature of the new style guide.6j6service manual download site
6j6service manual download site
In circuit design, Yamaha has a different characteristic, it's CPU protection is very good, such as leakage current, overcurrent, short circuit, open circuit, loss of pressure, even poor grounding can cause shell protection, that although the performance of the machine was very well protected and also brings more trouble for maintenance.6j6service manual download site
6j6service manual download site
Above is Chongqing into repair in the practical operation of maintenance failures, due to busy work, written maintenance record inevitably imperfect, these technical articles for reference purposes only, amplifier maintenance work is not shortcut to, which is a case of fault can be seen from the experience of others to solve the problem, so I hope that we all learn together and progress together6j6service manual download site