Plasma Panel Picture Defects - Sony KZ-32TS1U Training Manual

Chapter 4 - Plasma Panel Picture Defects
Board Location – Ref. Figure 4-1
a)
Vertical or
Horizontal
black / white
line through
the picture.
Normal Pix
d)
Black lower
half
g)
Power Supply Board
1
V
b)
H
e)
g) A Dark Screen with sound can be caused by the plasma
panel or the TV circuitry. Measure the DC voltages and signal
entering the plasma panel to determine which is defective.
CN 23
13, 15
CN 1
gray wires
1
Sony Model KZ-32TS1U // KZ-41TS1U TV Diagnostic Guide
Colored rain
in a black
background.
Normal Pix
Black upper
half
Dark screen?
Check DC and signal video levels at CN23 & CN 1.
Normal Voltages with TV ON, any input
CN23/pin 1 = 55Vdc
CN23/pin 3 = 5Vdc
CN23/pin 8-10 = 78Vdc (32") or 82Vdc (42")
CN1/pins 13 & 15 (gray wires) = 1Vp-p @ 30MHz
If these input voltages/signals are OK, the plasma
panel is suspect. CN1 is on the plasma panel below
the Power Supply board.
5
c)
White Noise
replaces 1/4
of the picture
f)
White noise
Black top, bottom
just white noise