0.6V or -0.6V
0V
TROUBLE SHOOTING
1. POWER
1.1. The unit does not power on
YES YES
YES
NO
NO
YES
NO
NO
Does the power indicator
on the front panel ash in
green or white when the
power is turned on?
Is a fuse blown?
Does the power display on
the front panel lights green
after approximately 10
seconds?
Check the voltage of pins 1,
3 - 7 of N1019 on the HDMI
PCB while the power display
is ashing in green or white.
Remove the connector (CP4001) of the SPEAKER PCB.
Check the "3.5. Protection history display mode"
(See page 50)
The unit does not power on
Is a fuse blown?
Does the power indicator on
the front panel ash in red
when the power is turned on?
Is DC 5 V being sup-
plied from the SMPS PCB
(CN4141) to the HDMI PCB?
See "1.2.Fuse is blown."
See "1.2.Fuse is blown."
Check the circuits around the Micropro-
cessor on the HDMI PCB and replace any
faulty parts.
To "3.5. Protection
History Display Mode"
(See page 50)
Are there any parts not fully
connected into the connec-
tors that connect the PCBs?
Is DC5V output even when
the connector (N1033)
supplying power from the
SMPS PCB to the HDMI PCB
is removed?
Check the circuits around
the Microprocessor on the
HDMI PCB and replace any
faulty parts.
Check for breakages and short
circuits in the circuits and parts be-
tween N1033 on the HDMI PCB and
the microprocessor power supply
and replace any faulty parts.
Connect the connectors correctly.
TO "6.SMPS"
(See page 95)
NO
YES
YES
YES
NO
NO NO
YES
Check for leaks and short
circuits in the parts on the
primary side. Replace any
faulty parts.
Blown fuse
Check the rectier diode in
the rectier circuit on the
secondary side, and check
for short circuits. Replace
any faulty parts.
Replace the fuse after repair.
Check for short circuits between
the regulator output terminal and
GND in the power supply stabili-
zation circuit. Replace faulty parts
if there is a short circuit.
1.2. Fuse is blown
80
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