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polaret
Joined: 23 Oct 2004 Posts: 90 Location: greece
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Posted: Thu Nov 10, 2005 7:08 pm Post subject: technics sa eh-790 |
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Hello i have a technics sa eh790 and the problem is that when i try to power on the indicator led goes out rellai click to power on and then turns off again (led in std by on )output stage O.K.
Any info .
Thanks in advance |
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Charlie Guest
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Posted: Fri Nov 18, 2005 5:43 pm Post subject: technics sa eh-790 |
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Are you sure the output stage is OK?
Normally F61 is displayed where the clock should be, this is generally the fault of the output chip.
If the unit has a cooling fan, make sure it's working, these can give problems which cause it to go into standby.
Try soldering a 100nF capacitor across the supply to the fan, this sometimes helps with intermittent going into standby. |
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rmkony Guest
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Posted: Sat Nov 19, 2005 6:33 am Post subject: SA-EH 560 Power Amp. |
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I have more or less similar to your system, it is SA-EH 560. It behaves like yours , once powered it prompt HELLO and goes to radio frequency 87.00mhz.After that nothing happens.Assist please. |
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polaret
Joined: 23 Oct 2004 Posts: 90 Location: greece
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Posted: Sat Nov 19, 2005 6:17 pm Post subject: |
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Hello my problem solved, i forget to check out main transformer there was the problem .About yours try to solder the front board main IC maybe bad contacs dry |
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Guest
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Posted: Tue Mar 03, 2009 9:38 am Post subject: sa eh760 |
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hi my technics stereo tuner amplifier was short circuited by a power generator and the fuse was blown off. after replacing the fuse the power gets into the amplifier but cannot turn on hence no display. please assist |
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Tumaini Guest
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Posted: Tue Mar 03, 2009 9:43 am Post subject: sa eh760 |
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Hallo my technics stereo tuner amplifier model no.sa eh760 was blown off by a power generator. It picks the power but cannot turn on hence no display. Anyone to assist please! |
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Justmanuals
Joined: 21 Aug 2004 Posts: 1948
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Ovetomash
Joined: 03 Apr 2020 Posts: 1
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Posted: Fri Apr 03, 2020 11:46 pm Post subject: |
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Hello guys. I have eh560. After long time no use i start it and sound was really terrible. But after few hours sound became clear and fine. For the night it was switched off and in the morning i receive same story - bad sound and lately restore.
After opening i didn't found anything visual except overheated resistor r765 near to transistors, but after check it was found good.
What could it be? In what direction i should dig? |
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