- 2 -
Power source system 1
Has the
FUSE (F900) blown?
NO
YES
Replace the lead wire.
Malfunction of PCB-DMD.
NO
YES
YES
YES
YES
NO
NO
LED is not lit.
Replace the lead wire.
Replace the PCB-KEY.
IC950 : Primary side SW-IC
IC9A1 : Secondary side feedback IC
Z9A0 : Circuit protector
Using the shielding case as GND is allowed when checking the voltage waveform or terminal voltage on the secondary side.
NO
(The product does not
enter the stand-by mode.)
Check the failure on the PCB-
POWER, then replace the parts
such as D900, Q900, etc.
Is the lead wire to
the PB and RB
connector cut?
Is the pin No. 3
of the RD
connector 5V?
Remove the
SD connector
from the PCB-
MAIN.
Is the pin No. 3
of the RD
connector 5V?
Check the circuit around IC950
and IC9A1, then replace the
parts. (specially, Z9A0)
Malfunction of the PCB-SIGNAL
Is the lead wire to
the KT and J13
connector cut?
Summary of Contents for SD200U
Page 108: ......
