No Sound (Video O.k) - Toshiba 15VL26P Service Manual

4-3. No Sound (Video O.K)

CHECK/REPLACE
IC601, L601, L602
CHECK/REPLACE
IC802
CHECK/REPLACE
IC601, X601
CHECK/REPLACE
IC701, IC601
CHECK/REPLACE
IC601
CHECK/REPLACE
IC651
CHECK/REPLACE
IC601
N
N
IC601 Pin 66, 65
11, 12, 13 = 5V ?
Y
N
IC601
Pin 39 = 8V ?
Y
IC601
N
Pin 71, 72 OSC O.K ?
Y
IC601 Pin 21
N
(A_RESET) = HIGH ?
Y
Y
IC601 Pin 47, 48
INPUT O.K ?
N
Y
IC601 Pin 33, 34
OUTPUT O.K ?
N
Y
IC601
INPUT O.K ?
N
CHECK
AUDIO INPUT JACK
IC601 Pin 27, 28
OUTPUT O.K ?
Y
IC681 Pin 4, 6
OUTPUT O.K ?
N
IC681
Pin 7 = 12V ?
Y
IC681
Pin 8 = HIGH ?
Y
CHECK/REPLACE
IC681
Fig. 1-4-4
1-12
Y
CHECK/REPLACE
SPEAKER, WIRE
N
CHECK/REPLACE
IC681, R681
CHECK/REPLACE
N
IC681, Q681
Q682, Q683