When power is removed from my receiver it looses all its settings e.g. radio channels, effects etc. Everything needs to be set up again. There is also a small digit flashing on the front LCD when e.g. radio is on. Any ideas?
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On all channels, or on one channel ? Some channels are "birdie" channels, check your user manual. Others are problem channels receiving false signals from computers, monitors, receivers, internet equipment, FAX machines, etc. If your in conventional mode, if in Digital mode the squelch is set by the processor, and I don't believe the squelch has any effect in that mode.
The Yamaha receiver is going into shutdown because one or two channels have shorted audio output semiconductors, first check all speaker wires for shorts, if okay! all parts that are effected will need to be replaced.
It seems that the main sound processor comes into an error and so seems a fault on the board. Since checking for a component level solution is very tricky as the access is not friendly, what could be done initially is to remove and reset the boards, check for faulty connectors that seems to vibrate and bring in these faults. Check the solde joints of the connector pins on the board. Check and solder the processor IC and the allied circuits. If the fault seems to disappear when the set heats up then you must check using a magnifier.Check the solder on the audio driver outputs of the center, main , front and rear are clean. If not refer and proceed with consensus as a false move can cripple the set.
if the unit only looses radio station presets then there is a defect with the unit. if the unit looses all its memory, (clock, stations, settings) then there is an issues with your aux power. basically you have the main power connect properly so it turns on the unit while the cars is on but the aux power keeps those settings.
Subject: Backup Memory on AVR/DPR/HK series receivers.
In the event of the complaint: “the receiver is losing its memory (any programmed system settings)
when the unit is turned off, or after the unit is unplugged (briefly*)”:
Check and replace:
Location: Front PCB
Description: 0.047 Farad 5.5v capacitor
Part number: # P10790-ND or # J3432147324X
I'm having the same problem and this is how far i got so far. I don't kwow how to get and replace this part.
You don't have an external amlifuer, do you? You could hook the pre-amp out for the center channel to an external amp and connect the speaker to the amp. That way you could determine if it is the center channel output or the internal amp. Either way you probably need to get it serviced.