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SECTION 1  SERVICE  INFORMATION

<DZ21K2/DS20K2/DW17K2/DZ16K2>

3. Pull out the air filter unit.

・ Pull out the air filter unit frame from the tabs of the projector body while slightly pressing around the center of

the frame at the front side (with the lens) inward as described with the arrow, and pull out the frame at the

opposite side from the tabs to remove the air filter unit.

・ After pulling out the air filter unit, remove large foreign objects and dust from the air filter unit compartment and

the air intake port of the projector body if there are any.

・ Take care not to touch the radiator fin when removing dirt or dust.

4. The air filter unit is washed and dried.

1) Soak the air filter unit in cold or warm water and then lightly rinse it.

・ Do not use cleaning tools such as brushes.

2) Rinse the air filter unit two to three times using fresh water each time.

3) Let the air filter unit naturally dry off in a well-ventilated place where

there is little dust and is not exposed to direct sunlight.

・ Please thoroughly dry before attaching to the projector.
・ Do not dry using drying devices such as dryers.

5. After the air filter is dried, attach the air filter unit and filter cover to the projector.

・ The air filter unit has no difference between top and bottom, but is two-sided.

Match the protrusion position of the air filter unit with the grooves on the projector body.

・ Hook the air filter unit frame at the air exhaust port side to the two tabs of the back side of the projector’s air filter unit.
・ Confirm that the tabs of the air filter unit compartment of the projector body are hooked to the air filter unit frame.

・ If you use the projector without attaching the air filter unit, the filter indicator <FILTER> blinks in red and

the message appears on the projected image for approximately 30 seconds.

Groove on the projector body

Protrusion of the air filter unit

Tabs on the projector body

Air filter unit

Tabs on the projector body

Tabs on the projector body

Air filter unit compartment and the 
projector’s air intake port

Protrusion of the air filter unit

Groove on the projector body

Tabs on the projector body

INF - 20

SECTION 1  SERVICE  INFORMATION

<DZ21K2/DS20K2/DW17K2/DZ16K2>

f If a problem should occur inside the projector, the lamp indicators <LAMP1>/<LAMP2>/<LAMP3>/<LAMP4>, 

the temperature indicator <TEMP>, and the filter indicator <FILTER> will inform you by lighting or blinking. 

Lighting in red

Blinking in red

(2 times)

Blinking in red

(3 times)

Warm-up status

Internal temperature is high 
(warning).

Internal temperature is high 
(standby status).

The cooling fan has 
stopped.

 

f Did you turn on the power 

when the temperature 
was low (around 0 °C 
(32 °F))?

 

f Is the air intake/exhaust port blocked?

 

f Is the room temperature high?

 

f

TER> lit?

―

 

f Wait approximately 5 

minutes (PT-DZ16K2: 
up to 20 minutes) in the 
current status.

 

f Install the projector in a 

location with the operating 
environment temperature 
between 0 °C (32 °F) and 
45 °C (113 °F)

*1

.

 

f Remove any objects that are blocking the air intake/

exhaust port.

 

f Install the projector in a location with the operating 

environment temperature between 0 °C (32 °F) and 
45 °C (113 °F)

*1

, and ambient humidity between 20 % 

and 80 % (no condensation).

 

f Do not use the projector at high altitudes of 2 700 m 

(8 858') or higher above sea level.

 

f

 

f Repair

*1  When using the projector at high altitudes (between 1 400 m (4 593') and 2 700 m (8 858') above sea level), the operating environment temperature 

should be between 0 °C (32 °F) and 40 °C (104 °F).

 °C (32 °F) and 35 °C (95 °F). However, it cannot be 

used at high altitudes.
If you use the Replacement lamp unit (for portrait mode), the operating environment temperature should be between 0 °C (32 °F) and 40 °C 
(104 °F) when using it at elevations lower than 1 400 m (4 593') above sea level, and should be between 0 °C (32 °F) and 35 °C (95 °F) when 
using it at high altitudes (between 1 400 m (4 593') and 2 700 m (8 858') above sea level). If you use the Replacement lamp unit (for portrait mode) 

 °C (32 °F) and 30 °C (86 °F). (Only for PT-DZ21K2, 

PT-DS20K2, PT-DW17K2)

 

f If the temperature indicator <TEMP> is still lit or blinking after taking the measures, ask your dealer for repair.

Lighting in red

Blinking in red

The temperature inside or outside the projector is abnormally high.

attached.

 

f

 

f Is the air intake/exhaust 

port blocked?

 

f Are you using the 

projector at elevations of 
2 700 m (8 858') or higher 
above sea level?

 

f

attached?

 

f Clean or replace the air 

 

f Remove any objects that 

are blocking the air intake/
exhaust port.

 

f Do not use the projector 

at elevations of 2 700 m 
(8 858') or higher above 
sea level.

 

f

 

f

TER> is still lit or blinking after taking the measures, ask your dealer for repair.

 

f

 SELECT] is set to [QUAD] or [TRIPLE], the setting may be forcibly changed to [DUAL]. To reset the 

Lighting in red/lighting in 

orange

*1

Blinking in red

(1 time)

Blinking in red

(3 times)

Time to replace the lamp 
unit.

The lamp unit or the lamp 
case is not installed.

A problem is detected in the lamp or the power supply for 
the lamp.

 

f Was [REPLACE LAMP] 

displayed when you 
turned on the power?

 

f The indicator lights up 

when the runtime of the 
lamp unit reaches 2 800

*2

 

hours.

 

f Is the lamp unit or the 

lamp case installed?

 

f Have you turned on the 

power again immediately 
after turning it off?

 

f Some error has occurred 

in the lamp circuit. 

 

f Replace the lamp unit.

 

f Install the lamp unit or 

the lamp case if it is not 
installed.

 

f Wait a while until the 

luminous lamp cools 
off, and then turn on the 
power.

 

f Check for fluctuation

(or drop) in the input
supply voltage.

*1  The indicator lights up in red while the lamp is turned off, and lights up in orange while the lamp is turned on.
*2  800 hours when using the optional Replacement lamp unit (for portrait mode) (Model No.: ET-LAD520P (1 pc), ET-LAD520PF (4 pcs)).

 

f If the lamp indicators <LAMP1>/<LAMP2>/<LAMP3>/<LAMP4> are still lit or blinking after taking the measures, ask your dealer for repair.

 

f Repair

INF - 21

SECTION 1  SERVICE  INFORMATION

<DZ21K2/DS20K2/DW17K2/DZ16K2>

f The shutdown function by safety detection

*1:Threshold varies depending by the lamp mode, fan mode, installation attitude, altitude above sea level.

Indicator status

STANDBY/ON
Red lights
TEMP
Red lights

Not lighting or flashing

U91

TEMP
Blinks in red 2 times

High temperature of
environment
Ventilation holes are blocked
Temperature sensor abnormality

Ventilation holes are blocked
Exhaust fan failure

Blown out of the fuse
( with some reason )

Rear cover is not installed

Ventilation holes are blocked
Ballast block failure

Optical module temperature
sensor bad connection

Abnormal installation or failure
of liquid cooling module
Ventilation holes are blocked

Self-diagnosis

－

－

Power fuse　<PF-P.C.B>
F9000 （20A）

Optical module temperature sensor
Below -20 ℃

STANDBY/ON
Blinks in red 1 times

OSD warning, etc

－

Power circuit temperature monitoring
thermistor (CF9100 / CF9200)
I/O (Over_HEAT) "Hi" is more than 1 sec

「TEMPERATURE
WARNING」

Intake air temperature sensor
Below -20 ℃

Interlock SW status
Open more than 1 second (R3-P.C.B  P31)

Intake air temperature sensor

Higher than ** ℃

*1

FPGA internal temperature sensor
Higher than ** ℃*1

Shutdown detection

Ventilation holes are blocked
Power fan failure

「TEMPERATURE
WARNING」

－

「TEMPERATURE
WARNING」

「TEMPERATURE
WARNING」

－

Ballast block heatsink
Sensed temperature （RT1）: 100～110℃

Probable cause

PFC output voltage drop

Intake air temperature sensor
bad connection

Exhaust air temperature sensor
bad connection

－

Power microprocessor failure

－

Optical module temperature sensor
Higher than ** ℃*1

－

UA4

H13

U21

UA5

H12

U22

Exhaust air temperature sensor
Below -20 ℃

H11

DMD power down
(Reference voltage> PFC output voltage)
more than 10msec

U24

Optical module temperature sensor
After lamp turn on, Is below 5 ℃ for more
than 5 minutes.

－

－

－

Usage environment temperature
is lower than the rated

－

－

Bimetallic Thermostat (Manual reset type)
　⇒ 152 ℃ or more （G-P.C.B  G24）

Check the installation
environment
Ventilation holes are blocked

－

STANDBY/ON
Blinks in red 3 times

F90/F91

F92/FA9

No response after FPGA configuration

Bad connection of each
P.C.Board connector
Signal processing block failure

F90:FPGA, F91:FPGA1,
F92:FPGA2・3, FA9:CPLD

－

Main software boot error

Main microprocessor rewrite
error

－

F81/F82

/F83

Formatter boot error
(F81:R/F82:G/F83:B)

DG-P.C.Board failure
FFC connection failure
Connector contact failure

－

FC0

Power microprocessor communication error

FC2

FRC communication error

FRC microprocessor failure

－

U81

AC power input voltage drop
65V or less, more than 600msec

Power input voltage reduction

－

U23

Exhaust air temperature sensor
Higher than ** ℃*1

Exhaust fan is deterioration,
abnormal
Ventilation holes are blocked

「TEMPERATURE
WARNING」

INF - 22

SECTION 1  SERVICE  INFORMATION

<DZ21K2/DS20K2/DW17K2/DZ16K2>

*2 : Countdown value (10-1) is displayed.

▼ Only warning

*1:Threshold varies depending by the lamp mode, fan mode, installation attitude, altitude above sea level.

Not lighting or
flashing

U35

Unsupported lamp use
Lamp ID unspecified, Same serial No. is 2
or more bulbs, Checksum incorrect

Use specified lamp units.

Shutdown If you select
[CANCEL] in the use
confirmation screen

U79

EXTRA OPTION
Filter type setting "SPECIAL2"

It has been set to use the smoke
cut filter

－

Lamp replacement
Change the Lamp drive mode
settings of the projector

EEPROM data uninitialized of lamp
(No response of "ACK")

Lamp memory (EEPROM)
communication error

LAMP
Blinks in red 1 times

Fan sense signal (except lamp fan)
Slower than 70% of target speed for 5 sec.

Liquid cooling pump sense signal
Slower than 70% of target speed for 5 sec

TEMP
Blinks in red 3 times

FE0 - FE6

FF1 - FF9

FJ0 - FJ2

FE0 - FE9

FF0 - FF9

FJ0 - FJ2

FE7/FE8
FE9/FF0

U71 - U74

Lamps memory (EEPROM) no response
(No response of "ACK")

Sense signal of fan or liquid cooling pump is
abnormality

Fan sense signal (lamp fan only)
Slower than 70% of target for 5 sec.

Fan failure or life time
Fan drive circuit failure

To turn off an applicable
lamp.
(Shut down in two or more)

Liquid cooling pump malrotation,
life
Liquid cooling pump drive circuit
malfunction

Warning:Slower than 80%
of target for 5 sec
(Warning:TEMP Red
lights)

2800h：「REPLACE LAMP」
3000h：「REPLACE LAMP

IN  10

*2

  MINUTES,

POWER WILL TURN OFF
AND GO INTO STANDBY
MODE
AUTOMATICALLY」
If all lamps was
correspond, shutdown

Lamp usage hour is over the
rated time.

Lamp fan is shut down in
two or more NG

Fan failure or life time
Fan drive circuit failure

Connector bad connection
Fan or Pump power failure
FPGA communication error

Lamp is not installed

If the lamp is not lit all,
shut down

[Lamp drive mode can not
be changed after lamp run
time reaches/exceeds 10
hours.]
If all lamps was
correspond, shutdown

－

Warning:Slower than 80%
of target for 5 sec
(Warning:TEMP Red
lights)

If the lamp is not lit all,
shut down

Indicator status

Self-diagnosis

Warning detection

Probable cause

OSD warning, etc

FILTER
Red lights

LAMP
Blinks in red 3 times

U04

[Airflow sensor] - [Intake air temperature
sensor]
Higher than ** ℃*1

U76

Filter unit detection switch
"Open"

LAMP
Red lights

Lamp runtime
More than 3 000 hours
(Shuts down after 10 min)

U34

2800h
 U41 -
U44
3000h
 U61 -
U64

F41 - F44

Lamp drive mode mismatch of projector
and lamps

Filter unit is not installed

「THE AIR FILTER HAS
NOT BEEN INSTALLED
PROPERLY」

Clogged filter
Ventilation holes are blocked

「CLEAN THE AIR
FILTER」

U51 - U54

Lamp status signal (Ballast microcomputer)
Status other than during normal operation

Lighting failure of the lamp
Hot restart
Lamp abnormality (burst)
Ballast block is abnormal
Blown out of the Power fuse

Indicator status

Self-diagnosis

Shutdown detection

Probable cause

OSD warning, etc

INF - 23