[TechAssist] Re: FIXED Electrohome PROJ60, chassis QV11,set goes into shutdown
- From: Kevin <kevintv@xxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 22 Apr 2004 23:58:34 -0700
Fix was R507, and D501, a damper diode in the horizontal circuit. These
2 parts were damaged when I disconnected plug RW (the 15 volt line to
the input signal board), which somehow disabled the shutdown circuit and
allowed the set to come on with HV. I smelled something burning and it
was R507 which cracked D501 in half. They were connected in series.
Now set has perfect linearity and no more pin cushion on the right side.
Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevintv@xxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin
Sent: Sunday, April 18, 2004 5:15 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: FIXED almost, Electrohome PROJ60, chassis
QV11, set goes into shutdown, need schematic
The fix was an open 1.2 ohm resistor, R540 off the flyback. This
resistor supplies the 28 volts to the vertical IC which I had already
replaced. So now the set comes on and stays on. The fix had nothing to
do with the RW plug which I found out was the 15 volt line to the signal
board.
But now the set has a linearity problem. On the right side there is a
pincushion problem--like a crescent moon about 3 cm or 1 inch wide.
With a crosshatch pattern the left side has the first 2 squares
measuring 13 cm wide, while all the rest measure 9.3 cm wide. With a
white background the first 10 inches on the left side are also
noticeably darker. Any tips would be appreciated. TIA
Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevintv@xxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin
Sent: Friday, April 16, 2004 1:15 PM
To: TECH-ASSIST
Subject: [TechAssist] Electrohome PROJ60, chassis QV11, set goes into
shutdown, need schematic
The customer said when the set was last on, she turned it off and heard
a loud crack or popping noise. Then when she turned it on, it was dead.
When the power button is pressed the HV comes up for a half second, then
drops down as a relay is heard clicking off and on. I replaced 3 caps
in the vertical, horizontal and P/S as well as the vertical deflection
IC with no difference. I checked the convergence board, audio outputs
and P/S--no shorts. I also pulled each yoke separately and each CRT PCB
separately with no difference.
Finally in desperation I pulled the RW plug on the signal board and now
the set comes on and stays on with HV and the heaters lighting up. Does
anyone have the SM so they could tell me what plug RW is and where it
goes? I am guessing it is the power for the signal board. I haven't
found any shorts on the signal board yet. The customer was hoping to
get his set fixed for the hockey playoffs which are on right now (of
course). TIA
Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevintv@xxxxxxx
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