Pioneer PDP-42A3HD Service Manual page 132

1
(1) Condition of Adjustment
Follow the procedure below.
A
1-1)Conduct "(3)Adjustment of Vsw1 & Vsw2"and"(4)Adjustment of Vbw& Vp", when High Voltage Board is replaced.
1-2) There is no need of adjustment if Board other than High Voltage Board.
(2) Voltage Label Check
Be sure to confirm voltages on Voltage label before conducting adjustment.
B
C
(3) Adjustment of Vsw1 & Vsw2
D
Vsw1 : Adjust VR3 so that the voltage between Test Pad (TP328) and GND becomes
"Rated Voltage on Label ± 0.5V".
Vsw2 : Adjust VR4 so that the voltage between Test Pad (TP310) and GND becomes
"Rated Voltage on Label ± 0.5V".
E
F
132
1
2
Example
Vbw : 115.2
Vsw1 : 220.2
VP : 249.8
Vsw2 : 210.1
(Caution) Use the nearest chassis for grounding.
High Voltage Board
VR3 Vsw1
PDP-42A3HD
2
3
Voltage Label
Vbw
(s190.0/d70.0)115.2/220.2/249.8/210.1
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TP310 Vsw2
VR4 Vsw2
TP328 Vsw1
3
4
Vsw1 Vp Vsw2
4