Pioneer DBR-TF100 Service Manual page 43

5
from MAIN Assy
check
YES
A_L2,
Check
A_R3
NO
NO
Is Base of
Q4002 high?
YES
NG
Check Q4003
& Q4004
OK
Check Components around IC4001
Check A_L1 & A_R1
OK
Check
pin60 of IC4003 is low?
OK
Change IC4003
NO O/P from SPDIF
Is JA4000
illuminated?
NO
Check OFF_D+5V Rail
from PSU, and
repair/replace
from MAIN Assy
check
OK
Check CVBS at
V2
(see Note1)
Note1: Also check
IC4003 pins
NG
Y → 6
C → 8
R → 10
G → 12
B → 14
Check for video signal
at Omega
side of filters?
OK
(C4005/6/7,
C4009/10/11)
NG
OK
Check R2054/
R2055
NG
5
6
[Audio Troubleshooting Section (5)]
Check CN4000 & CN4001
Replace Q4002
Replace components
NG
Check components around IC4001
NG
Check components around IC4003,
replace
[SPDIF Troubleshooting Section (5a)]
YES Check/replace R4057
or JA4000
[Video Troubleshooting Section (6)]
Check CVBS at
R4045
(see Note2)
NG
Replace IC4003
Replace filter components
Omega NG, replace
Replace
DBR-TF100
6
7
Is audio OK?
YES
A_L2,
A_R3
NG
NO
Is SPDIF
modulating?
YES
Audio O/P OK
OK
Check CN4000 & CN4001
Note2:
Also check Pins of R4003
C/R → 42,G → 40,B → 38
VCR_CVBS/Y → 48,VCR_C → 46
7
8
Return to
MAIN Assy
Flow chart
Omega NG, replace
8
A
B
C
D
E
F
43