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

From: mebonnell@xxxxxxxxx (Max Bonnell)
To: techassist@xxxxxxxxxxxxx
Date: Mon, 14 Jun 2004 10:54:52 -0500

Barry mentioned the collector of the HOT should be 1.08k and he had 450
volts.
Maybe I'm wrong but I have never seen voltage that high on a HOT. Normal
is 120 to 150.

PS. Barry say hello to John Watson for me.

Max Bonnell
Bonnell TV
Robinson, IL

 
 
Sender: techassist-bounce@xxxxxxxxxxxxx From:
damon101@xxxxxxxxxxxxxx(Damon) Date: Mon, Jun 14, 2004, 7:38am To:
techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re: sony tv KV-27S66 no
video, led blinks nonstop Reply=A0to: techassist@xxxxxxxxxxxxx 

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 
|=A0>
|=A0> 
| >> 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.... 
|=A0>> 

| >> Thanks in advance,
| >> Barry Scanlan
| >> Engineering Dept.
| >> WEHT-TV 
|=A0>>
| 
----------------------------------------------
- 


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

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