In an amplifier maintenance person's point of view, Onkyo brand products to consumers in China Cosco not as widely as Yamaha, Sony, because only AV Onkyo products sold in the domestic market and mini combo amplifier two types of products, there is a small amount of digital power amplifier, which are few community class-d amplifiers. But in the minds of consumers in understanding the Onkyo product, still with that brand is power amplifier products have at least the same level of trust, because its product performance, technical sophistication and price are several brands. DTS decoding technology of new products, next-gen power amplifier with HDMI interface, almost in the market are Yamaha, Denon and Onkyo AV products in the lead. Also, I thought the design of their products mature, rational layout, amplifier and stereo system repair and it is also more comfortable, convenient, at least not like some machine, flying lines, circuit board Assembly and disassembly is hard, the most typical is the JVC UX-7000, though small, but it's very compact, and are hard to remove.wbmservice manual download site
After years of practice, was able to summarize some Onkyo and differ from other brands, such as potentiometers, Yamaha amplifier if months or years without, the potentiometer will cause problems, and Onkyo and Denon will not but Onkyo problems due to long-term use of relays, Denon and Yamaha will not. Denon amplifier level after the bad ones, Onkyo and Yamaha amp has never met her. This is a very interesting thing, someone once joked that small Japan do things all figured out what kind of failure, repair a lot of Chinese money, of course, that statement is not objective.wbmservice manual download site
Onkyo TX-SR403 amp Repair: a case reportwbmservice manual download site
Symptom: power on for three seconds off protectionwbmservice manual download site
Maintenance: this machine is a Onkyo AV amp in the bottom of the paragraph, the price is only around 2000. This machine uses a SRT44 series thick film power amplifier blocks. This protection is first suspected power amplifier chip failure, disconnect from electrical source, by plus or minus 15 volt power supply to the amplifier, input audio signal test, found a second power amplifier no sound system replaced the normal.

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