Sanyo Xp 55 Manual

Multimedia ProjectorSERVICE MANUAL  
PRODUCT CODE 
1 122 185 00
(MR3A)
1 122 185 20(MR3AL)
1 122 186 00(PR3A)
1 122 186 20 (PR3AL)
1 122 186 02 (PR3C)
1 122 186 22(PR3CL)
Original Version
REFERENCE NO. SM5110500
FILE NO.
Model No. PLC-XP55
PLC-XP55L
U.S.A., Canada,
Europe, Asia, Africa
Chassis No. MR3-XP5500
MR3-XP55L00
NOTE:Match the Chassis No. on the unit’s
back cover with the Chassis No. in the
Service Manual.
If the Original Version Service
Manual Chassis No. does not match
the unit’s, additional...

2
■Contents
■Safety instructions ________________________________________________3
■Specifications __________________________________________________ 4
■Note on Servicing  ______________________________________________ 5
■Adjustments after parts replacement ________________________________ 5
■Circuit protections ______________________________________________ 6-7
● Fuse ____________________________________________________ 6
● Thermal switch ____________________________________________ 6
● Interlock switch...

3
■Safety Instructions
WARNING:
The chassis of this projector is isolated (COLD) from AC line by using the converter transformer. Primary side of
the converter and lamp power supply unit circuit is connected to the AC line and it is hot, which hot circuit is iden-
tified with the line ( ) in the schematic diagram. For continued product safety and protection of personnel
injury, servicing should be made with qualified personnel.
The following precautions must be observed.
SAFETY PRECAUTIONS
1: An...

4
■Specifications
●The specifications are subject to change without notice.
This symbol on the nameplate means the product is Listed by Underwriters
Laboratories Inc. It is designed and manufactured to meet rigid U.L. safety stan-
dards against risk of fire, casualty and electrical hazards.
Projector Type Multi-media Projector
Dimensions (W x H x D)12.6” x 6.6” x 18.5” (319mm x 168mm x 470mm) 
Net Weight 20.3 lbs (9.2 kg) (PLC-XP55), 
17.4 lbs (7.9 kg) (PLC-XP55L)
LCD Panel System 1.3” TFT Active Matrix...

5
● : Adjustment  necessary ❍ : Check necessary
■Adjustments after Parts Replacement
Condenser lens adjustment❍●
Relay lens adjustment❍●
Contrast Adjustment
R-Contrast adjustment●
G-Contrast adjustment●
B-Contrast adjustment●
Output voltage adjustment●
+16 V adjustment●
Fan output voltage adjustment●●
Video center adjustment●
PSIG adjustment●
PC pedestal adjustment●
PC gain adjustment●
PC gamma gain adjustment●
PC black level adjustment●
Video A/D reference voltage top & bottom adj.●
Video pedestal...

-6-
●Interlock switch
The interlock switch (SW902) cuts off the AC mains power supply
when the lamp cover is removed. After opening the lamp cover
for replacing the lamp ass’y, place the lamp cover correctly other-
wise the projector can not turn on.
●Thermal switch
There is the thermal switch (SW905) inside of the projector to
prevent the internal temperature from rising abnormally. When
the internal temperature reaches near 90˚C, turn off the AC main
power supply automatically.
The thermal switch is...

-7- Circuit Protections
●Warning temperature and power failure protection
The TEMP WARNING indicator flashes red and the projector will automatically turn off when the internal tempera-
ture of the projector exceeds the normal temperature or when stopping cooling fans or when the internal power
supply lines are failed.
Check the following possible causes and wait until stopping the TEMP WARNING indicator flashing.
Possible causes
- Air filter is clogged with dust particles. Remove dust from the air...

-8-
1Remove 5 screws A, 2 screws B, and loosen 2 screws
C, and thentake the Cabinet Top upward off.
Note: If you want to remove the Cabinet Front-Top only,
you do not need to remove screws 
A. Remove 2 screws
Band Lens Front Cover.
■Mechanical Disassemblies
Mechanical disassemble should be made following procedures in numerical order.
Following steps show the basic procedures, therefore unnecessary step may be ignored.
Caution:
The parts and screws should be placed exactly the same position as the...

-9- Mechanical Disassemblies
1Remove 6 screws to take the Main Board upward.
Fig.3
Fig.4
1Remove 1 screw A and take the Rear Panel ass’y
upward off.
2Remove 4 screws Bto take the fan (FN905) off.
3Remove 5 screws Cand 1 screw Dto take AV Board
from the Rear Panel ass’y off.
4Remove 2 screws Eand grounding leads and then pull
up the I/F Board and Holder assy from the bottom cabi-
net.
5Remove 4 screws Fto take the I/F Board.
Main Board removal3
AV,I/F Board & Rear Panel removal4
Main Board
AB B
B
B
C
D...

-10- Mechanical Disassemblies
1Remove 4 screws Ato take the Ballast Cover upward
off.
2Remove 3 screws Bto take the Fan (FN904) and the
Fan mounting base off.
3Remove 2 screws Cto take the Fan (FN904)  off from
the Fan mounting base.
4Remove the Sub Power Board and Drive Board by
pulling them upward.
Fig.5 Lamp Ballast Unit removal
5
A
Ballast Board
FN904
Sub Power
Board
Drive Board
AA
A
CC
Ballast Cover
1Remove 1 screw Aand then remove the holder.
2Remove 2 screws Band 4 screws C(small)and pull the...