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

  • From: "Damon" <damon101@xxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 14 Jun 2004 07:38:20 -0500

B+ output from the SMPS is most likely low then, Check R607 1st (see my
other post). You may have to check all the resistors/diodes in the
base/emitter circuit of Q601/Q603 to get this running. What is the B+
voltage with it running? I think it's supposed to be 120, or 130V.

Damon Brunger
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Barry Scanlan" <scaninky@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, June 13, 2004 8:49 PM
Subject: [TechAssist] Re: sony tv KV-27S66 no video, led blinks nonstop


| I already tried that... I thought I had good HV but I checked and I only
have 12kv. I looked at the h. driver and signal looks good on the base and
collector but... the base on Q502 the H. Out transistor it should be 23.4 p
to p but I only have 6.9 P-P. Just not sure why... the collector should be
1.08 kv I have 450v.
|
| Barr Scanlan
| Eng.
| WEHT
|
| ---------- Original Message ----------------------------------
| From: "al m" <ampm@xxxxxxx>
| Reply-To: techassist@xxxxxxxxxxxxx
| Date:  Sun, 13 Jun 2004 21:36:22 -0400
|
| >You got a weak CRT. Turn up the screen a little and the video will come
on.
| >Al Marquardt
| >ampm@xxxxxxx
| >Al Marquardt Electronic Repair
| >206 W Main
| >Girardville Pa. 17935
| >----- Original Message -----
| >From: "Barry Scanlan" <scaninky@xxxxxxxxxxxxx>
| >To: <techassist@xxxxxxxxxxxxx>
| >Sent: Sunday, June 13, 2004 6:05 PM
| >Subject: [TechAssist] sony tv KV-27S66 no video, led blinks nonstop
| >
| >
| >> 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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