Question about Sherwood RX-5502 Receiver

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When power is turned on, standby light comes on normally, but in any playing mode, the receiver switches off and the standby light flashes.

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Gary Beighton

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It looks like this is a common problem with a lot of the Sherwood Receivers. I've had the same problem with my R-125RDS for a while now. Finally hit on solution today by replacing a power transistor. The transistor in question is not on the power amp board but instead screwed to the chassis and wired to the mainboard. I believe it is part of the output short protection circuit. In my case the component was a 2SD2059 (silicon NPN 100V,5A) replaced by equivalent 2SD1407. The transistor seems to run pretty warm so I guess this is why they ultimately fail after a few years.

Posted on Oct 27, 2011

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1 Answer

Mum pressed some buttons on amp now the amp wont respond to the original remote or the universal remote. buttons wont work, batteries good and lights up. is there a button that blocks ir signal?


Looking at the user guide it appears that the amp has a standby mode.

See not below on turning standby on. Question can you see the standby light flashing.

I would also suggest using function on the amp to remove any possible issues with the remote.

One would expect the system to return to normal operation by pressing the power button again. If not what do you see on the display.

Note:
Press 1 to turn on the receiver.You can also turn on the receiver using 1 on the remote control. When you turn off the receiver, press 1 again. "STANDBY" flashes on the display panel. Do not disconnect the AC power cord (mains lead) while "STANDBY" is flashing. This may cause a malfunction.

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PDP-4340HD keeps turning off.


Continuous blinks of standby light indicates a fault in the IIC data bus. The main board is likely to be faulty. If you wish to know more Check this link.

Feb 03, 2013 | Pioneer PureVision PDP-4340HD 43 in....

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Tv won't turn on- its in standby mode. the young lad had the remote before it was turned on.... could he have pressed somethin on the remote which is now preventing it from coming on?


Powering up do you hear the relay click then you may see the display flash (not necessarily), but then the TV clicks back into standby mode. If so there is a component failure.
will need diagnosis by a repair shop. Too many different components it could be for me to guess. but
the common repair kit containes1 fuse (F302), 1 diode (D304), the power resistors (R927 and R929 for the board revisions with these two resistors) and the IC301 voltage regulator IC.

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Power switch


The red standby light is always on. It should only change when you press 'power'. When you turn it off, it is on 'standby', meaning you can switch the switch to make it start-up in play or record mode by using a timer and the switch below the power switch. This is normal for Sony.

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My pioneer vsx 815 amplifier has a flashing blue standby light. Have tried resetting by pressing enter and advanced surround keys. All it does is flash a few other LEDs and then goes back to the flashing...


Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Pioneer-VSX-815-K-Receivers-manual/id/385dj989/t/2/

"enter and advanced surround keys"? I don't see that documented as a special function in the manual.

BTW: other than the Flashing light, is there a malfunction?

Page 72 describes how it REALLY resets...

Resetting the main unit

Use this procedure to reset all the receiver's settings to the factory default. Use the front

panel controls to do this.


1 Switch the receiver into standby.


2 While holding down the TONE button, press and hold the STANDBY/ON button for about three seconds.


3 When you see RESET? appear in the display, press ENTER .

OK? shows in the display.


4 Press SYSTEM SETUP to confirm.

OK appears in the display to indicate that the receiver has been reset to the factory default
settings.

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1 Answer

HK 3370 turned into protection mode after pluging in a playing iphone. Happened more than one hour ago but hk3370's power light is still red. How do I get this thing out of the protection mode?


turn unit off using main power button, hold down t-mon and cd buttons at same time as switching main switch on should power up and show reset on the display for a short time then dhould go to standby this has reset unit and should now be ok

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1 Answer

After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


Is the red light flashing at first?
The unit may be going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

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No Power


I mwas gonna suggest that you need the speakers attached but you stated later that it did the same thing with the speakers attached. The unit switching off after it checks its self is NOT a normal thing. TAKE IT BACK BEFORE ITS TOO LATE!! GOOD lUCK

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