JVC TH-A25 Service Manual page 26

5.3.2 Logo operation
Fig.1
5.3.3 Audio operation
1-26 (No.MB141)
Check 27MHZ crystal
FIg.1
Check 114MHZ(pin 102
of U13)
Video OK
3
Check Audio Digital signal
at pin 33,36,37 of U13
Y
Audio out
Y
OK
2
Y
Y
N
Y
OK
N
Check NEW DSP Parts
N
Check Main AMP parts
Check Voltage
of REG2 2.85V
REG3 3.50V
Check Video signal of
VQ1,VQ3,VQ4,VQ5,VQ6