Re: sony STRD965 blown R channel
Source: http://sci.techarchive.net/Archive/sci.electronics.repair/200612/msg00287.html
From: "Mike" <nospam@xxxxxxxxxxxxx> Date: Sat, 02 Dec 2006 21:39:19 GMT as soon as i unhook the speaker, the wave is fine. any ideas???
"Mike" <nospam@xxxxxxxxxxxxx> wrote in message news:aGlch.1545$Ye5.905@xxxxxxxxxxxxxxxxxxxxxxxxx Ok the front panel was dead, had 2 fuses blown, and the MN2488 and MP1620 was shorted in the right channel. the rest was fine. Well, i replaced both fuses, replaced both outputs and the 2 10ohm base resistors. I checked every other resistors and found things to be normal. i replaced a high ESR 47uf cap also. there was a small PNP transistor near the 2 outputs that was shorted also, replaced that.
The set now turns on and works, except as soon as I hook a speaker up to the right channel output, it goes into protector. i checked and double checked the resistors in the output circuit. If i leave the speaker unhooked, its fine. there is NO DC offset according to me meter on the right channel. if i set the meter on AC, I can see the AC signal on the meter, and on my scope just normal. if i hook the speaker up to the right channel, it fires protector mode. the other channels work fine. any ideas?

Sony Service Company National Technical Services A Division of Sony Electronics Inc. Park Ridge, New Jersey 07656

CONFIDENTIAL

Service Bulletin Hi-Fi Products

CSA-13

Model:

STR-D965

Subject: Erased Memory Symptom: (**)

Date: December 4, 1996

The customer complaint may state, when the surround level is set to maximum and the unit is powered off, all memory is erased.

Solution:

Replace the part listed below. REF FORMER DESCRIPTION IC104 MB90673-144 PART NUMBER 8-759-384-77 DESCRIPTION MB90P673-144 NEW PART NUMBER 8-759-451-99
Reference: Sony Canada HiFi-96-068
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