Why is my Sony receiver amplifier not working?
Why is my Sony receiver amplifier not working?
The current from this is used by the AC detect chip NMJ2103 which checks for abnormal power. The detection of abnormal power results in pin 8 of the chip going low close to zero volts. This pin also controls the STOP pin on the amplifiers main microcontroller IC to hold it into a reset condition.
Where is the standby Board on a Sony amplifier?
The Sony STR-DE375, STR-DE475, and some STR-DEXXX range of amplifiers tend to have a standby board that is often the focus when I am starting my diagnostics. It is a small board right next to the main power transformer, and it is responsible for maintaining standby power to the amplifier so that it could be operated by remote control.
Why is my Sony KDL 46w905a not turning on?
Post some good pictures of your power board with your question. Adding images to an existing question Unless there is a schematic available it will be almost impossible to determine which component has failed. Since you do not get standby etc. it is most likely that you will need a new power board.
What should I do if my Sony amplifier wont start?
This article is for times when you are absolutely sure that there is no fault in the audio power output stage, and the problem is elsewhere. The Sony STR-DE375, STR-DE475, and some STR-DEXXX range of amplifiers tend to have a standby board that is often the focus when I am starting my diagnostics.
The Sony STR-DE375, STR-DE475, and some STR-DEXXX range of amplifiers tend to have a standby board that is often the focus when I am starting my diagnostics. It is a small board right next to the main power transformer, and it is responsible for maintaining standby power to the amplifier so that it could be operated by remote control.
Why does my Sony receiver not turn on?
Further investigation of the circuit diagram revealed that a chip marked NJM2103 generated the STOP signal. Specifically pin 8 of this chip generates 5.5 V all the time when operating correctly. This chip detects AC current and the quality of the supply voltage.
