No
No
– 14 –
∗
Vs and -Vy must be
adjusted.
No
No
Fan protector operated
Power lamp:
Flashes once intermittently in red.
(for 0.5 sec. at an interval of 3 sec.)
Chec
k 2
Start
No
Yes
Yes
Yes
Is voltage
at connectors
P505
q
,
t
,
o
and
P8202
q
on DC/DC
power PCB
24V ?
Is voltage at connectors P505
and P507 on the DC/DC power
PCB normal ?
(1)
P505
!
0
, P507
w
, 0 V to
4.3V or 6.6V to 7.0V
(2)
P505
w
,
y
12.0V to 13.0V
or 0V
Is fan rotary signal of DC/DC
power PCB normal ?
(1)
P505
!
1
, P507
e
, 0Hz or
19.6Hz to 103.7Hz
(2)
P505
e
,
u
120.3Hz to
168.7Hz or 196.6Hz to
256.3Hz
Is voltage
at connector
CN103
u
,
i
on Power
Supply Unit
normal ?
(24V)
DC/DC power
circuit faulty
Replace DC/DC
power PCB.
Power Supply Unit
circuit faulty.
∗
Replace Power
Supply Unit.
Temperature protector operated
Power lamp :
Flashes intermittently twice in red.
(for 0.5 sec. at an interval of 3 sec.)
Chec
k 3
Start
Adjust PDP unit installation so that
peripheral temperature is 40.0°C or
less.
No
Yes
Is ambient temperature
of PDP unit less than
47°C ?
Microcomputer
peripheral circuit
faulty.
Yes
Replace
Main/Digital
PCB Assy.
Microcomputer
peripheral circuit
faulty
Replace
Main/Digital
PCB Assy.
Fan faulty
Replace fan.
Yes
Microcomputer
peripheral circuit
faulty.
Replace
Main/Digital
PCB Assy.
Temperature
sensor faulty.
Temperature sensor cooling
The temperature sensor PCB is installed
inside a mesh. Turn the power off and cool
with a point cooler.
Replace
temperature sensor
PCB.
Does unit
operate normally
when temperature sensor PCB
changed ?
