23
BDP-120
5
6
7
8
5
6
7
8
A
B
C
D
E
F
No video si
g
nal output from the MAIN PWB Unit
Is video signal input into each terminal of SC5601?
1) S-
V
IDEO and COMPOSIT OUTPUT TERMI
N
ALS
2 pins (SUB_YOUT), 4 pins (SUB_COUT)
2) CO
N
PO
N
E
N
T-
V
IDEO TERMI
N
AL
6 pins (MAI
N
_YOUT),
8
pins (MAI
N
_PBOUT),
10 pins (MAI
N
_PROUT)
N
O
YES
Is video signal input into the base of transistor for each buffer?
1) S-
V
IDEO and COMPOSIT OUTPUT TERMI
N
ALS
Q5604, Q5605
2) CO
N
PO
N
E
N
T-
V
IDEO TERMI
N
AL
Q5601, Q5602, Q5603
Check SUB_PC_5
V
line.
Check SC5601.
YES
N
O
Check IC7201.
FLOW CHART No.3
No audio si
g
nal output from the MAIN PWB Unit
Is audio signal input into terminal of each connector?
1) 2ch analog audio connection
Pins (12) (MAI
N
_L) and (14) (MAI
N
_R) of SC5606.
YES
N
O
Is there output from DAC?
1) 2ch analog audio connection
Check pins (9) and (10) of IC5606.
Check the peripheral circuits of SC5602.
Check the A
N
ALOG PWB Unit.
YES
N
O
Is 5
V
supplied to pin (13) and -
8V
to pin (11) of IC5606
respectively?
Check the peripheral circuits of IC5602.
N
O
Replace IC5606.
YES
YES
Is any digital signal input into pins (1) - (4) of the IC5606?
Check the peripheral circuits of IC7201.
N
O
FLOW CHART No.4
No video and audio si
g
nal output from HDMI terminal.
set (cable) and reconfirm.
Still no video and audio output?
YES
Defective T
V
set or cable. Or, check the contact of soldered
connector of SC4201.
N
O
Are output voltages of IC4204 as 5
V
, IC4202 as 3.3
V
OK?
Check the IC4204 and IC4202 or peripheral circuits.
N
O
YES
Is the data line functioning (Hi/Low)?
Check IC7
8
02, IC7
8
03, IC7
8
04, IC7
8
05, IC
8
502, IC
8
505 and
their peripheral circuits.
Replace IC7201.
Or rewrite the main software.
N
O
YES
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
