Pioneer PDP-424MV Service Manual page 28

Failure diagnosis of the Data HIC
Failure symptom: The image in any block of the screen is not displayed.
Check with a tester between Pin 5 or 6 (Vd line of Data IC)
and ground of each Signal Relay PKG.
OK: Open
NG: Short-
circuited,
CN2
CN3
Failure diagnosis of the Digital PKG
Chip fuse (FU701) at the
upper-right corner of the digital
PKG
28
CN2
CN8 CN8
CN8
CN3
OK: Short-
NG: Open
7-6
CN8
CN8
circuited,