26
SC-71
1
2
3
4
A
B
C
D
E
F
1
2
3
4
5. DIAGNOSIS
5.1 DIAGNOSIS FLOWCHART
NO POWER
This is just for general reference and does not including every single case.
No Power
Error Indications ?
S
tand by
No
Yes
Yes
No
Refer to the
"5.2 [4] Error Indocations"
Jump to “No FL DI
S
PLAY”
Fuse FU4 OPEN ?
No
Yes
Diagnose or replace
PRIMARY A
SS
Y
Check PRIMARY A
SS
Y
JP51-1,2,
3
pin or DIGITAL
MAIN_L A
SS
Y
CN9501-1,2,
3
pin +5.6V
No
Check DIGITAL MAIN_L A
SS
Y
CN601-1,2pin +5.6V
Check +5.6V line on DIGITAL MAIN_L A
SS
Y
Check DI
S
PLAY A
SS
Y
C6017 +
3
.
3
V
Replace DI
S
PLAY A
SS
Y
or replace L6001
Yes
Yes
Yes
Yes
Yes
Check DI
S
PLAY A
SS
Y
L6001 +5.0V
Replace DI
S
PLAY A
SS
Y
or replace IC6002
Check DI
S
PLAY A
SS
Y
IC6001 10pin +5V (XRE
S
ET)
Check the signal path of XRE
S
ET
or Replace DI
S
PLAY A
SS
Y
Check DI
S
PLAY A
SS
Y
IC6001
3
2pin (POWKEY)
H
L when press power key
Check the signal path of POWKEY
Check DI
S
PLAY A
SS
Y
CN6001 16pin (DVCPOW)
L
H when press power key
Check the signal path of DVCPOW
No
Check DI
S
PLAY A
SS
Y
CN6001 12pin (ACRY)
L
H when press power key
No Problem
Replace DI
S
PLAY A
SS
Y
Check the signal path of ACRY
Check PRIMARY A
SS
Y
JP51 7pin (ACRY)
L
H when press power key
Does RY71 turn on
when press power key ?
Remove AC code and remove
CN9501. Insart AC code and
check JP51-1,2,
3
pin, +5.6V
Diagnose or replace
PRIMARY A
SS
Y
No
Diagnose the power supply path of
V+5R6_EV after PRIMARY A
SS
Y
Yes
Check V-REG_
SS
A
SS
Y
CN7901-
3
0,
3
1pin +5.6V
Replace FFC
(DIGITAL MAIN_L to V-REG_
SS
A
SS
Y)
Check V-REG_
SS
A
SS
Y
CN790
3
-1,2pin +5.0V
CN7902-
3
6pin +4.9V(XRE
S
ET)
Check DI
S
PLAY A
SS
Y
CN6001-
3
8,
3
9pin +5.0V
CN6001-4pin +4.9V(XRE
S
ET)
Replace V-REG_
SS
A
SS
Y
or D7901 or IC7901
Replace FFC
(V-REG_
SS
A
SS
Y to DI
S
PLAY A
SS
Y)
No
No
No
No
No
Yes
No
Yes
No
No
Yes
No
Yes
No
No Problem
Replace DI
S
PLAY A
SS
Y
Yes
Yes
No
Yes
Yes
No
Yes
Check the signal path of ACRY DI
S
PLAY A
SS
Y
V-REG_
SS
A
SS
Y
DIGITAL MAIN_L A
SS
Y
PRIMARY A
SS
Y
Check the circuits around RY71 or replace PRIMARY A
SS
Y
Check DIGITAL MAIN_L A
SS
Y
CN601 16pin (DVCPOW)
L
H when press power key
Check the signal path of DVCPOW DI
S
PLAY A
SS
Y
V-REG_
SS
A
SS
Y
DIGITAL MAIN_L A
SS
Y
Diagnose or replace
DIGITAL MAIN_L A
SS
Y
