No
No
No
– 15 –
∗
Vs and -Vy must be
adjusted.
No
Fan protector operated
Power lamp:
Flashes once intermittently in red.
(For 0.5 sec. at an interval of 4 sec.)
Chec
k 2
Start
Yes
Yes
Is voltage
at connectors
CN352
w
and
o
on
Main/Digital
PCB 14V?
Is voltage at connectors CN951,
CN953 and CN954 on
Main/Digital PCB normal ?
+
e
and -
q
of CN951, 953
and 954 5V to 11V.
Is fan rotary signal of
Main/Digital PCB normal ?
Pin
w
of CN951, CN953 and
CN954 16 to 90 Hz.
Power Supply Unit
circuit faulty.
∗
Replace Main
Power PCB.
Temperature protector operated
Power lamp :
Flashes intermittently twice in red.
(For 0.5 sec. at an interval of 5 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 IC757 on Main/Digital
PCB less than 60°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 IC757 faulty.
Temperature sensor cooling
The temperature sensor IC757 is installed
on Main/Digital PCB. Turn the power off
and cool with a point cooler.
Replace
temperature sensor
IC757.
Does unit
operate normally
when temperature sensor
IC757 changed ?
