Read Panasonic PT-TW371R (serv.man3) Service Manual online
INF-18
SECTION 1 SERVICE INFORMATION
<TW371R>
4. 4. Troubleshooting
4. 4. 1. Starting Abnormality
Follow the procedures below.
Input 100-240V.
ON(G)/STANDBY(R)
indicator light?
Check the A board's
16V power input.
Yes
Yes
Yes
No
No
Check 3_3V_MCU and
if ON_MCU (7th pin of
IC1801) is high level.
Power error:
Check if the fuse is melt,
If there is any component damaged
on the power board.
1.1. 3_3V_MCU is low, check
IC1007 is working properly
1.2. If the seventh pin of IC1801 is
low, IC1801 is abnormal.
2.1. Reburn Sub CPU and Flash
program.
2.2. IC1801 is abnormal.
1.1. Check if IC1102/IC1009
and IC1008 are working
properly.
2.1. Reburn Sub CPU and
Flash program.
2.2. Replace IC1004.
Power secondly supply error or fan control circuit error
1. Check if IRIS is abnormal when the projector is started.
2. Check if FAN_A, FAN_B and FAN_C are low level when the projector is started.
3. Cooling fans error (FN3001, FN3002, FN3003, FN3004, FN3005), signal FAN_
ERR error.
4. Power drive signal error (LAMP_DC_ON, LAMP_EN), Lamp cover sw error
(P3002)
Projector internal temperature error
1. Check if TEMP. A (P3006) is well connected.
2. Check if IC1002 and IC1003 and their surrounding loops are normal.
3. The intake or exhaust ventilation holes are blocked.
ON(G)/STANDBY(R)
indicator lights in
orange.
ON(G)/STANDBY(R)
indicator blinks in
orange.
No
No
Yes
Yes
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