1
8
HTP-072
1
2
3
4
A
B
C
D
E
F
1
2
3
4
5. DIAGNOSIS
5.1 TROUBLESHOOTING
N
o Power
Other trouble.
Check D303 to D308, PT301, IC301
on STBY Assy or replace STBY Assy.
AMP DC Protention works.
Disconnect speaker cables if you connect speakers.
(Prevention of Speaker destruction.)
Is Stand by?
(or O
N
→
Stand by)
Is the error indicated?
(HDMI LED flashing?)
Does DC Protection work
when power O
N
again?
Yes
This is just for general reference and does not including every single case.
Yes
Yes
N
o
N
o
Replace STBY Assy.
N
o
Cancel the DC detection. Refer to "6. [3] 3.4 How to
cancel the status after detection of the DC error".
Connect speakers, and check that sound output does
not have any problem.
Replace CPU Assy.
Check IC301 on STBY Assy or
replace STBY Assy.
N
o
Check cable connection between CP701 on STBY Assy and
C
N
701 on FRO
N
T Assy. If it is OK, replace that cable.
N
o
N
o
Is the fuse (F301) open?
Is the v5.6 V?
(STBY Assy CP701
pins 6, 9)(C301 +side)
Is the v10 V?
(FRO
N
T Assy
C
N
701 pins 1, 4)
Yes
Yes
Check +10V line on FRO
N
T Assy
or replace FRO
N
T Assy.
N
o
Is the v10 V?
(FRO
N
T Assy
C
N
705 pins 21, 22)
Check connection betwwern C
N
705 on FRO
N
T Assy
and C
N
704B on CPU Assy.
Check cable connection between CP701 on STBY Assy and
C
N
701 on FRO
N
T Assy. If it is OK, replace that cable.
If the connection check is
N
G, check the FFC cabel
between C
N
705 and C
N
704B or replace the FFC cable.
N
o
Yes
Is the v10 V?
(CPU Assy
C
N
704B pins 21, 22)
Check connection betwwern C
N
705 on FRO
N
T Assy
and C
N
704B on CPU Assy.
If the connection check is
N
G, check the FFC cabel
between C
N
705 and C
N
704B or replace the FFC cable.
N
o
Is the v3.3 V?
(CPU Assy
C
N
704B pins 16, 17)
Is the v3.3 V?
(STBY Assy
IC301 pin 2)
Yes
Yes
Check +3.3V line on FRO
N
T Assy
or replace FRO
N
T Assy.
N
o
Is the v3.3 V?
(FRO
N
T Assy
C
N
705 pins 16, 17)
Yes
N
o
Is the v3.3 V?
(FRO
N
T Assy
C
N
701 pin 5)
Yes
Yes
Refer to "5.2 [1] Overload and DC Protection Circuit",
Diagnosis AMP6 Assy and MAI
N
Assy.
Yes
N
o
No Power
Summary of Contents for HTP-072
Page 9: ...9 HTP 072 5 6 7 8 5 6 7 8 A B C D E F ...
Page 73: ...73 HTP 072 5 6 7 8 5 6 7 8 A B C D E F ...
Page 80: ...80 HTP 072 1 2 3 4 A B C D E F 1 2 3 4 C SIDE B CP2001 CP2000 Q2043 Q2041 IC2018 Q2038 ...
Page 81: ...81 HTP 072 5 6 7 8 5 6 7 8 A B C D E F C C D MAIN ASSY SIDE B CP2003 CP2006 CP2005 CP2200 ...
