Servicing Information; Diagnostics; Av Board Troubleshooting - Hitachi 32PD3000 Service Manual

8. SERVICING INFORMATION

Diagnostics

8.1.
Phenomenon
PDP LED is
flashing
No picture
Picture unstable
Noisy picture on
RF (TV)
No sound
No WSS
response and no
TELETEXT

AV Board Troubleshooting

8.2.
No picture,
power working
Composite,
component in
No Picture
Both
RF, video
in
All
No picture
Pins 49~51
of IC100?
Yes
AV3000 AVC Unit Service Manual
50-way cable between AVC and FC4?
Digital interface cable DVI24 or DIN8 disconnected?
See "AV Board Troubleshooting"
Crystal oscillates?
Comb filter works?
VIF inputs around pins 1~4 of IC100 input proper signal?
Slow response toward R/C handset
IC301 pins 58/59 input proper signal (0.1~0.8Vp-p)
IC100 pin 32 signal observed?
Component IN only
No picture
RF
Pin 10 of
IC100?
Yes
Check TR101 & TR100
No
Check IC100
& around
Check
Point
Check SAW
No
filter, tuner
& around
21
Potential
Problem
Cable disconnected
Cable disconnected
Dry joint/solder bridge
X100/C135/X101/C136
Component dry joint/solder
bridge/broken in CHROMA lines,
e.g. R208/Q121/Q122
Components of comb clock IC101 pin
19
Dry joint/solder bridge at pins 1~4 or
broke device of IC100
R319 disconnected
F-sound-out line component failure
Pin 32 solder bridge (to pin 31)/dry joint
or in line of CVBS-micro
Pins 1~4
No
of IC003, signal
observed?
Yes
No
Pins 16 & 28
of IC08?
Yes
Check IC10
between
IC03 & PSF
Check IC02
& parts around
Check pins 1,
2, 21, 22 & 26
of IC08