[TechAssist] Re: sony tv KV-27S66 no video, led blinks nonstop

  • From: "Damon" <damon101@xxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 14 Jun 2004 07:32:17 -0500

You may want to check R607 in the power supply primary circuit, normally 0.1
ohm 1/2 watt fusistor, it's the white resistor along the outside edge of the
board.

Also check the Horiz out and drive transformer/resistors for loose
connections. I've had very few shorted IHVTs, so I doubt that's the problem,
but trace the 200V supply and check the cap/diode/resistor at the source,
with no pix that should be reading 200V. Is the heater lighting up? I've had
loose connections on the IHVT cause that too.
Your constant blinking indicates the CRT isn't turning on, it stops when
video is applied, but the IK pulse has not come within specs to turn it
on.....adjusting the screen control up to see what you get (no raster/grey
raster w/retrace) can help isolate the constant blinking, cuz if it's too
low that crt just won't turn on at all.

Damon Brunger
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Barry Scanlan" <scaninky@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, June 13, 2004 5:17 PM
Subject: [TechAssist] Re: sony tv KV-27S66 no video, led blinks nonstop


| Update... on the HV I only have 11K
|
| Barry scanlan
| engineering
| WEHT TV
|
| ---------- Original Message ----------------------------------
| From: "Barry Scanlan" <scaninky@xxxxxxxxxxxxx>
| Reply-To: techassist@xxxxxxxxxxxxx
| Date:  Sun, 13 Jun 2004 17:05:50 -0500
|
| >I'm  sorry if this message got sent twice... problem with this browser
based email. Anyway, I have a Sony KV-27S66 that was blinking the led 2
times....B+ OCP. After searching I found C641 was loading down the 12v
line.... down to 6v. I also found Q601 and Q603 were leaky in the PS
section. I replaced those also. The problem is, now with the new cap in
place, I have audio but no video and the led just blinks non stop. When you
first turn on the tv the relay kicks in and you can hear the HV and the
audio comes up but the led just keeps blinking and the picture does not come
on. I have checked all the voltages and they are fine except one....TP504,
it should be 200v but I have 156 volts.  I have spent a lot of time on this
and would appreciate a little help so I can move on....
| >
| >Thanks in advance,
| >Barry Scanlan
| >Engineering Dept.
| >WEHT-TV
| >
|
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