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DMD chip, FM-PCB and TIR prism Replacing Procedure
DMD chip, FM-PCB and TIR prism Replacing Procedure
6
[1] FM-PCB replacement
Tools:
• Phillips screw driver
1. 1. FM-PCB removal
DMD heatsink
B
A
C
Backer plate
Insulation sheet
DMD block
Thermistor*
* only for G-DMD
FM-PCB
Smooth sur-
face side comes
to FM-PCB side.
Smaller dia side
of spring comes
to screw head
side
[Note]:
• The mounting method of the thermistor differs depending on
the models. For further information, refer to each model's
service manual.
E.g.: PT-RZ12K series
1. Remove 4 screws/spring-A and take off the heatsink from the DMD unit.
2. Remove 4 screws-B and take off the backer plate and FM-PCB from the
DMD unit..
DMD chip, FM-PCB and TIR prism Replacing Procedure
DMD chip, FM-PCB and TIR prism Replacing Procedure
7
Radiator pump
Pump hold spring
B
A
C
Backer plate
Insulation sheet
DMD block
Thermistor*
* only for G-DMD
FM-PCB
Smooth sur-
face side comes
to FM-PCB side.
[Note]:
• The mounting method of the thermistor differs depending on
the models. For further information, refer to each model's
service manual.
E.g.: PT-RZ31K series
1. Remove 2 screws-A and take off the pump support spring and pump radiator from the DMD unit.
2. Remove 4 screws-B and take off the backer plate and FM-PCB from the DMD unit..
DMD chip, FM-PCB and TIR prism Replacing Procedure
DMD chip, FM-PCB and TIR prism Replacing Procedure
8
1. 2. FM-PCB mounting
Heat dissipation compound :
Shin-Etsu Silicone [ G-776 ] grade 0.05g
Apply heat dissipation compound
DMD heatsink type
DMD radiator pump type
2) Clean up on the rear of the DMD chip
t Remove the old heat dissipantion compound on the rear
surface of the DMD chip cleanly.
1. Preparation
1) DMD heatsink or DMD radiator pump preparation
t Remove the old heat dissipantion punpound on the rear
surface of DMD heatsink or DMD radiator pump and apply
new one evenly.
t Take care that compound does not stick out.
Interposer
Remove the
remaining com-
pound cleanly.
Caution!
Do not touch the part of the metal pin on the interposer and the
contact part on the FM-PCB. Cause the poor contact outbreak
DMD chip, FM-PCB and TIR prism Replacing Procedure
DMD chip, FM-PCB and TIR prism Replacing Procedure
9
2. Mount the FM-PCB on the DMD unit.
1. Mount the FM-PCB and insulation sheet and backer plate on the DMD unit.
2. Tighten 4 screws-B each in numerical order 1 to 4 as shown in the picture to fix them on the DMD unit.
3. (G-DMD only) Mount the thermistor on the backer plate. Its mounting method may differ depending on the models.
3. Mount the radiator pump or heatsink on the DMD unit.
1
3
4
2
(Torque:70 N•cm)
(Torque:70 N•cm)
(Torque:70 N•cm)
(Torque:70 N•cm)
1
2
3
4
1
2
3
4
(Torque:70 N•cm)
(Torque:70 N•cm)
E.g.: PT-RZ31K series
E.g.: PT-RZ12K series
Thermistor
Thermistor
Heatsink
Radiator pump
Pump hold spring
(In case of radiator pump type)
1. Mount the radiator pump with the pump hold spring on to
the DMD unit.
2. Tighten 2 screws-A to fix the pump hold spring.
(In case of heatsink type)
1. Mount the heatsink on the DMD unit and Tighten 4 screws-
A each in numerical order 1 to 4 as shown in the picture.
Smaller dia side
of spring comes
to screw head
side
A
C
C
B
B
A
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