No Video - Toshiba 15DL72 Service Manual

4-2. No Video

4-2-1. No Video (Sound O.K)
CHECK/REPLACE
IC701, INVERTER
CHECK/REPLACE
IC201, IC301
CHECK/REPLACE
IC302, Q301, IC701
4-2-2. No Video (Sound O.K)
CHECK/REPLACE
IC101, D104, L105
CHECK/REPLACE
IC501, IC601
N
N
LCD PANEL
LAMP ON ?
Y
IC301
N
OUTPUT O.K ?
Y
IC301
N
Pin = 3.3V ?
Y
CHECK/REPALCE
LCD PANEL,
INTERFACE CABLE
RF MODE O.K
A/V MODE NG ?
IC501 Pin 7
Y
SIGNAL O.K ?
N
IC501 Pin 1, 3
Y
INPUT SIGNAL O.K ?
N
CHECK
INPUT CABLE
OSD DISPLAY
O.K ?
Y
IC201 PDA [0..23]
SIGNAL O.K ?
N
IC101
Pin 62, 63 OSC O.K ?
Y
CHECK/REPLACE
IC101
Fig. 1-4-2
RF MODE N.G
A/V MODE O.K ?
IC502 Pin 3
SIGNAL O.K ?
N
CHECK/REPLACE
TU1, Q502
Fig. 1-4-3
1-9
Y
CHECK/REPLACE
IC201
N
CHECK/REPLACE
X101, IC101
Y
CHECK/REPLACE
IC502, Q501, IC601