Pioneer PDP-42A3HD Training & Troubleshooting Manual page 90

Symptom:No Picture. (Priming doesn't flash if W-X
erminals are short-circuited.)
Cause/Countermeasure: No Diode
]Exchange High Voltage
characteristic
Board.
High Voltage Board; Surface
PH2401F
High Voltage Board; Reverse
X
(112)
W
(109)
V
(107)
T
(99~103)
S
(93~96)
R
(91)
Q
(86~89)
P
(81~84)
O
(76~78)
N
(71~74)
M
(66~69)
L
OK: Diode characteristic
(61~64)
NG: Other than above
K
(57~59)
90
PH2401F
Checkpoints
A-D M-L
A-E N-P
B-D O-P
C-D Q-R
E-R R-S
F-N R-T
G-M S-T
H-I T-V
I-J W- X
K-L
A
(1~4)
B
(6~9)
C
(10~13)
D
(15~18)
E
(24)
F
(33~35)
G
(39~40)
H
(49~50)
I
(53)
J
(55~56)