HCD-GT3D
27
SMPS Board Diagnosis Flow
SECTION 5
TROUBLESHOOTING
The Output from SMPS Board is checked.
Is following power voltage up to standard?
Standby
CN2005 pin1,4,5
CN4 pin5
AC IN
Yes
No
Yes
END
No
Checks whether the state of a Cable and Outlet are normal.
If there are no problems, checks circumference circuit for
Main on Output of Main mount side.
Replaces SMPS Board if it is not up to standard.
The Power Control signal to SMPS Board is checked.
Is following power voltage OK?
Main on
CN2005: pin9
13.5V±0.5V
13.5V±0.5V
0V 0V
13.5V±0.5V
50V±5%
(1) AC input
(2) Fuse
(3) Sub Power transformer
(4) CN2005 Connector
pin1: 13.5V
pin3: AGND
pin4-5: 13.5V
pin6-7: M/DGND
pin8: AC-DET
pin9: MAIN-ON
(5) MAIN Power transformer
(6) CN4 Connector
pin1-5: V1 (50V)
pin6-9: V1_GND
Hi (3.3V)
Power OnDemo mode
Low (0V)Low (0V)
Standby
Power OnDemo mode
(1)
(2)
(3)
(6)
(4)
(5)
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