Question about Sony KP-51WS510 51" Rear Projection HDTV-Ready Television
The TV turns off itself immediately after power on (protection circuit triggered). the standby led blinks intermittently 5 times each 5s. I opened the front and and unplugged all the CRT boards (CG, CB or CR boards).
Surprisingly, when plugging either one of these boards (only one at a time) when I powered on the TV; it stays up and doesn't anymore turn off itself.
As the TV power on only with 1 CRT gun at a time, I tried to increase the screen volt with a small screw until the lines disappeared. I repeated this process with the blue, the green and the red CRT guns.
But once I plugged all 3 CRTs back up and turn the TV on, the protection circuit began back turning off the TV within 5s.
It sound like you have a bad picture tube...check your 1k circuit for correct voltage and wave form.
Posted on Oct 13, 2008
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Posted on Jan 02, 2017
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Nov 26, 2011 | LG 42LC2D 42 in. LCD HDTV
Unit is dead, No blinks
- Problem in the standby power section. Might check fuse, R607,
Q601, IC601, R612 and VDR601 (should show open).
Continuous blink once a
second, no pausing - No reply from the jungle IC301 (data
bus is busy, shorted to ground, or held high), IK video path is
One blink - not
used for the self-diagnosis
blinks - B+ over current protection (OCP), unit goes to the
standby mode then displays the 2 blink fault. Could be a short in
supply of any of the circuits.
Three blinks - B+
over voltage protection (OVP), unit goes to the standby mode then
displays the 3 blink fault. This is also a problem in the power
supply circuit, check T603 and R672.
Four blinks - No
vertical Deflection (V STOP), Screen goes to a single horizontal
line then the video signal muted. Check IC1509, Q1505
Five blinks - AKB
circuit (automatic kine bias), the timer/standby indicator blinks
for about 30 seconds then goes to the self-diagnosis function.
Something is wrong with the video. Check video out, Q705, 732, 761
and other components on the C board, also check Q218, 219, 220 on
the A board. In addition, unit could be in IK blanking, try turning
up screen slightly.
Six blinks - No
Horizontal (H STOP), no raster, goes to the blinking self-diagnosis
function immediately. Check C515 & 516 and the jungle IC, IC206.
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