KV34XBR800,DA-4, four blinks, - AVS Forum
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Old 12-09-2007, 08:39 PM - Thread Starter
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KV34XBR800 DA-4 Chassis. Set displays a four blink error code. Checking the following components netted the following voltages from around the Horiz Output Xformer, T5001.

Q5003 (PWM-OUT) IRFI9630G-LF
G= +130V
S= +133V
D= +72V

IC5004 (vert output) STV9379
Pin1= +0.6V
Pin2= +15.8V
Pin3= -9V
Pin4= -9.7V
Pin5= -8.4V
Pin6= +15V
Pin7= +0.6V

IC5005 (Horiz Cent) LA6500-FA
Pin1= +72V
Pin2= +72V
Pin3= +73V
Pin4= +75V
Pin5= +105V

there is a raster in the lower half of the screen when G2 is advanced which appears to be folded over and rolling, the raster is also narrow as if a lack of B+. Swapping out IC5004 (vert output) made no change. Any idea why "d" voltage on Q5003 is 72volts instead of 10 as the service lit suggests??? Any help is greatly appreciated as I believe these boards are now NLA as an assembly.
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Old 04-04-2011, 08:22 AM
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I have a Sony KV34XBR800 Some times the set would not power up.
I have replaced IC6501 and IC8002 I did use sockets and installed new
MCZ300DB's The TV worked well for about a week, then back to the seven blinking lights and not powering up. I checked my soldiering and it looks good are there any other parts that could be bad
Any help would be welcomed
Thank you
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