Question about Onkyo TX-SR875 Receiver
The 10 Ohms resistor R9304 in series with the the 44V display power supply was open.
How to find it:
Remove the to cover.
On the right hand side of the front panel you will see on the side a wide white flat cable going toward the back of the receiver.
Beside it is a 4 black wire band connecting the front panel to a 3x4cm power PCB which is parallel with the front panel inside the receiver (attached to the front frame).
It has visible on the left side a diode bridge and a fuse - above the fuse you can find the R9304, a SFR16 package (1x3.5mm) marked BrownBlackBlack.
Check continuity.Replace if open wit a 1W resistor
Good job ONKYO, save 1/3 of a penny...
For the DIY:
As an added step I replaced the R9304 with a 2W 47R resistor, replaced the series transistor regulator Q9301 (tall TO92) with a bigger package (isolated TO220) and one of the two series 22V zenners from the base - D9310 - with a 10V one.
Output voltage drops from 44V to 34V, display is slightly dimmer but overall stress is down.
Posted on Oct 09, 2008
Replacing the resistors marked, 9304 & 9310, on the display board, fixed the problem.
Read this AVS Forum Thread for detailed instructions
Posted on Dec 27, 2008
ZONE 1 (living room)
DishNetwork Dual Tuner DVR Tuner 1 [S-Video out] -> [S-Video in] ONKYO TX-SR875 [HDMI out] -> [HDMI in] Sony KDS-60A3000 rear projection TV
ZONE 2 (living room)
DishNetwork Dual Tuner DVR Tuner 2 [Composite Video out] -> [Composite Video in] ONKYO TX-SR875 [Composite Video out] -> [Composite Video in] Samsung AQUOS LCD TV
ONKYO receiver stops sending video signal to my ZONE 1 Sony TV through the HDMI connection. ZONE 2 may still receive video. (NOTE: the issue might be related to the upconverter circuitry?)
I couldn't see any video, but I could hear the Tuner 1 audio through my ONKYO. An important clue is that I couldn't see ONKYO's on-screen display menu on my TV when hitting the [Setup] button on my remote. But, I could see my TV's Sony-based menus and display options.
1. Put all ZONES in Standby mode using the remote. Hit these buttons on remote: [Receiver], then [Standby]. [Receiver], [ZONE2], then [Standby], [Receiver], [ZONE3], then [Standby]. You should NOT see any lights on the ONKYO except maybe one red led near the power button.
2. Pull the power plug out of the back of the ONKYO, and leave unplugged for 20-30 seconds. Turning off any power center it is connected to isn't enough. You MUST unplug the power from the back of the ONKYO for 20-30 seconds.
3. Reconnect the power cord to the ONKYO.
4. Using the remote, set ZONE1 to a video source known to be working. If you don't see video, try leaving the power cord off for a longer period.
I know it sounds too simple to work, but that's what brought the video back for me the few times the video stopped displaying. Hope it works for you.
Posted on Feb 06, 2008
Thanks for the input. It turned out to be R9310 on the same board. Replaced it and Bang!!! It is up and running again! Thanks man!
Posted on Nov 15, 2008
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