Sanyo AVL-193, Руководство по обслуживанию

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8
Troubleshooting charts
1. No raster, no picture and no sound
When the main power is turned on, the unit’s indicator lights up in red (red indicator is controlled by
+3.3VSTANDBY), use the remote control or the unit’s STANDBY to lights up the blue indicator.
Whether the IR board’s
red indicator lights up?
Power board’s +3.3V
is abnormal
Whether the blue
indicator lights up
when press the
STANDBY button?
Confirm the IR
sensor and its power
supply is normal
Indicator damages or blue
ind9V power is
abnormal (check +9V circuit)
Whether the
backlight lights up?
Whether the voltage
of the panel is
normal?
8125 is abnormal without
signal output or the output
signal is abnormal
Whether the backlight
power or PBIAS pin is
l
Backlight board damage or protection.
Replace the backlight board
Whether the
backlight power or
PBIAS pin is normal
Check power circuit or whether the 8125
PBIAS signal is normal
N
Y
Y
Y Y
Y
N
Y
N
N