Daewoo DTR-14D3VG, Service Manual

Page: 54 / 73

52
5. NO SOUND(PICTURE OK)
CHECK AUDIO SIGNAL
AT PIN15 OF I501
CHECK MUTE VOLTAGE
AT PIN20 OF I701
*MUTE : HIGH
CHECK SIF SIGNAL
AT PIN1 OF I501
CHECK / REPLACE I501
CHECK SIGNAL
AT PIN AT 3 & 13
OF I604
CHECK / REPLACE
Q501, Q604, Q605
Q602, Q603 & PERI. COMP
CHECK SIGNAL WAVEFORM
AT PIN6 OF I501
[REFER TO WAVEFORM
¥M
]
CHECK /REPLACE
R619, C657, Q635, Q640,
Q641, D640, I701
CHECK / REPLACE
TUNER, SAW FILTER
Q101, Q102 & PERI. COMP
CHECK Q645, Q632
R660, R661
CHECK 12V LINE
OF I602
CHECK SIGNAL
AT PIN3 & 7 OF
I602
CHECK 12V LINE
R651, D633, C640
CHECK & REPLACE
I604
CHECK & REPLACE
I602
NORMAL
NORMAL
NORMAL
NORMAL
NORMAL
NORMAL
NORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
CHECK SIGNAL
AT PIN 10&16 OF
I606
CHECK & REPLACE
SP01, SP02
CHECK 26V LINE
OF I606
CHECK & REPLACE
OF I606