24
MHC-V42D
SMPS Board Diagnosis Flow
SECTION 5
TROUBLESHOOTING
The Output from
SMPS board is checked.
Is following powe
r voltage up t
o standard?
AC
IN
Yes
No
Yes
END
No
Check whether the state of the Cable and Outlet are normal. If there are no problems, check
circumference circuit for Main ON on
Output of the Motherboard 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
NO6501
Pin9
Standby Low (0V)
Demo mode Hi (3.3V)
Power On Hi (3.3V)
NO6501
Pin1,4,5
CN6500
Pin6,7,8,9
Standby 17±5V 58.5±5V
Demo mode 17±5V 58.5±5V
Power On 17±5V 58.5±5V
(1)
AC input
(2) Fuse (3) MAIN power transformer (4) NO6501 connector
Pin 1 : Audio (+17V) Pin 3 : Audio (GND) Pin 4 : LED (+17V) Pin 5 : LED (+17V) Pin 6 : LED (GND) Pin 7 : LED (GND) Pin 8 : AC DET Pin 9 : Main ON Pin 10 : Network ON Pin 11 : Low/High AC Pin 12 : Latch ON
Pin 1 : PGND Pin 3 : PGND Pin 4 : PGND Pin 5 : PGND Pin 6 : PVDD
(DC+58.5V)
Pin 7 : PVDD
(DC+58.5V)
Pin 8 : PVDD
(DC+58.5V)
Pin 9 : PVDD
(DC+58.5V)
(5) CN6500 connector
(1)
(2)
(3)
(5)
(4)
SYS SET
2019/03/05 00:47:46 (GMT+09:00)