Trouble Shooting - Sanyo DCS-AVD8501 Service Manual

TROUBLE SHOOTING

TROUBLE SHOOTING
(This is a basic waveform check.)
Audio PART
ANALOG OUTPUT;
NO SOUND
SPDIF OK
DISPLAY OK
DAC OUTPUT
CONFIRM
IC817 pin7,8
N
IC817 BCK
DATA LRCK CONFIRM
(pin2,3,4)
N
IC801 ACLK
AOUT3 LRCLK CONFIRM
(pin78,71,79)
N
IC817 pin
FLOATING CONFIRM
(IC817 NG)
POP NOISE
MUTE CIRCUIT CONFIRM
Video PART
NO PICTURE
AUDIO OK
IC801
VIDEO OUTPUT
NORMAL OK?
N
LOADER CHANGE
OK?
N
IC801 NG
MUTE CIRCUIT/SIGNAL CONFIRM,
Y
DAC-OUTPUT SOCKET
LINE CONFIRM
IC817 pinFLOATING CONFIRM
Y
PCMCLK pin16 CONFIRM
PERIPHERAL CIRCUIT
(POWER SUPPLY) CONFIRM
Y
ACLK AOUT3 LRCLK SIGNAL
LINE CONFIRM
IC801 - OUTPUT LINE CONFIRM
Y
LPF CONFIRM
pin108 - 120PERIPHERAL
CONFIRM
Y
LOADER CHANGE
ANALOG OUTPUT;
NO SOUND
SPDIF NG
LOADER CHANGE
OK?
Y
LOADER CHANGE
ANALOG OUTPUT OK
SPDIF NG
IC817 pin68 SPDIF
OUTPUT OK?
N
IC817
pin FLOATING CONFIRM
(IC817 NG)
NOISE
LOADER CHANGE
OK?
Y
LOADER CHANGE
NO COLOR or ABNORMAL
X8101 27MHz
OK?
Y
IC801 VIDEO
OUTPUT OK?
Y
IC801 NG
A PART PICTURE
NOT OUTPUT
IC801 VIDEO
OUTPUT OK?
Y
IC801 - OUTPUT
LINE CONFIRM
- 39 -
N
IC817 pinFLOATING CONFIRM
(IC817 NG)
Y
SPDIF MODULE - IC817
pin68 LINE CONFIRM
IC817(DAC)or IC817(MPEG)
N
PERIPHERAL CONFIRM
IC817 or IC817 NG
N
CRYSTAL RESONATOR CHANGE
IC801 - OUTPUT LINE CONFIRM
N
LPF CONFIRM
pin108 - 120 PERIPHERAL
CONFIRM
N
pin108 - 120 PERIPHERAL
CONFIRM