DOWNLOAD Panasonic PT-EX16KU / PT-EX16KE (serv.man4) Service Manual ↓ Size: 37.53 MB | Pages: 127 in PDF or view online for FREE

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This projector provides the following circuit protections to operate in safety. If the abnormality occurs inside the pro-
jector, it will automatically turn off by operating one of the following protection circuits.

Fuses are located inside of the projector. If all the indicators are not lighting, 
the fuse (F602) may be opened. If the STAND-BY indicator is lighting and 
others are blinking, one of the fuses (F601, F603) may be opened. If fuse 
(F601.  F603)  opens,  the  power  supply  to  the  LAMP1/LAMP2,  or  LAMP3/
LAMP4 will be cut off.  
Check the fuses as following steps.
The fuses should be used with the following type;

1.  Remove the cabinet top, main board, PFC/Ballast box1-2 

following to "Mechanical disassembly".

2.  Remove the fuses  F601, F602 and F603 on the AC filter 

board.

F603

F602

F601

AC filter board

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There are the thermal fuses (SW903, SW904, SW905 and SW906) inside of 
the projector to detect the internal temperature rising abnormally. When the 
internal temperature around lamps reaches near 99˚C, the thermal fuse will 
open to cut off the power supply to the lamp power circuit.
If one of the thermal fuses opens, the projector cannot turn on the lamps. If 
the STAND-BY indicator is lighting and others are blinking, one of the ther-
mal fuses may be opened. Thermal fuse replacement is required. The re-
placement of the thermal fuses must be done with a set of 4 fuses at once.

SW903

SW904

SW905

SW906

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The projector provides 2 temperature sensor ICs, 1 sensor on the main board and 1 sensor on the ex temp board, 
and 1 wind sensor on the intake duct. The sensor ICs monitor surrounding temperature of the panels/prism, and 
surrounding temperature of the intake duct, and the wind sensor monitors airflow passed through the air filter in the 
intake duct.
- Temperature sensor (IC8851) on the main board for monitoring the surrounding temperature of B-panel.
-  Temperature sensor (IC8811) on the ex temp board for monitoring the surrounding temperature of the intake duct. 
- Wind sensor (S901) on the filter box. 

IC8851
(Behind)

S901
Wind sensor

IC8811

When the temperature inside the projector reaches a certain level, the WARN-
ING TEMP. indicator starts blinking. If the temperature rises moreover, the 
projector will be automatically shut down to protect the inside of the projector, 
and the WARNING TEMP. indicator is blinking fast and the POWER indicator 
turns off. When the projector has cooled down enough (to its normal operat-
ing  temperature),  the  POWER  indicator  turns  on  and  the  projector  can  be 
turned on again by pressing the ON/STAND-BY button.

✔

•   The WARNING TEMP. indicator continues to blink even after the tempera-

ture inside the projector returns to normal. When the projector is turned on 
again, the WARNING TEMP. indicator stops blinking. 

Check the items below
- Remove dust around the air filter.
-  Ventilation slots of the projector are blocked. In such an event, reposition the 

projector so that ventilation slots are not obstructed.

-  Check if projector is used at higher temperature place (Norma; operating 

temperature is 5 to 40 ºC or 41 to 104 ºF).