Mitsubishi Electric WD 73735 Service Manual

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 11
OPTICAL ENGINE REMOVAL
OPTICAL ENGINE ASSEMBLY REMOVAL
1) Remove 3 screws (C) from the Optical Engine.
2) Disconnect all cables to the Optical Engine Assembly.
3) Carefully slide the Optical Engine assembly from the cabinet.
OPTICAL ENGINE ASSEMBLY AND CONNECTOR LOCATIONS
(Rear View)
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 12
OPTICAL  ENGINE REMOVAL FROM THE DUCT ASSEMBLY
Figure 1:  Duct Assembly (Rear View) Figure 2:  Duct Assembly (Top View)
Upper Duct Assembly Removal Procedure
1) Disconnect the Ballast Fan and Lamp Fan from the back of the Engine (co\
nnectors J4 and J8) and loosen
wiring harnesses from the looms, refer to page 11 for connector locations.
1) Loosen two screws ( a) to remove the Lamp Cartridge, refer to  Figure 1.
3) Remove 3 screws ( b) from the top of the upper duct and release the 7 snaps shown in  Figure 2.
4) Carefully remove the upper Duct assembly
LOWER DUCT (Upper Duct Removed)
1) Figure 3  shows the components in the Lower Duct.
2) The Sirocco Fan and Exhaust Fan can be replaced.  The Engine and Upper Duct do not have to be removed  to replace the Ballast.
3) If replacing the Engine, remove the Thermal Sensor from the Engine (1 s\
crew)  Figure 3.
       
Figure  3:  Lower Duct (Top View)
Ballast Exhaus t
Fan
E xhaus t Fan
Holders (3)
Sirocco Fan
Thermal Sensor
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 13
Figure 4:  Lower Duct rear Mounting Screw
Figure 5:  Lower Duct  front Mounting Screw
LOWER DUCT REMOVAL
1) Remove the 2 screws ( C) one in front and one in the rear of the lower duct, refer to  Figures 4 and 5.
2) Carefully remove the lower duct from the Engine.
ENGINE REPLACEMENT (Reverse the Removal Procedure)
1) Install Duct assembly on the new Engine.
2) Remove the Protective Lens Cover from the face of the Lens.
3) Install the Engine Assembly in the cabinet.
4) After a new Engine is installed Load Index Delay Data from the Engine an\
d Copy Settings to Backup (page 32).
5) Adjust Raster Centering (page 28) and Manual Keystone Geometry  Alignment (page 29) if needed.
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 14
BALLAST ASSEMBLY REMOVAL
REMOVAL PROCEDURE
1) Remove screw (A) from the Ballast support
and screw (B) if the Engine is still mounted
in the cabinet.
2) Slide the Ballast Assembly out the rear of the Engine assembly and unplug the Lamp
connector (C)  at the Ballast.
3) Disconnect connectors CJ1 and CJ3.
4) Remove screw (D) to remove the PWB- BALLAST from the Ballast Support.
Reverse the procedure to install a new Ballast  .
SCREEN REMOVAL & REPLACEMENT
Screen Assembly (Bezel)  Removal
1) Remove all rear screws (B) except one in an upper corner  (To support the
screen assembly while removing the front mounting screws).
60 Inch Models
WD-65835 & WD-73835 Only
Escutcheon Removal
Before Removing the  Screen Assembly
(V39++ Models Only)
1) Remove 2 screws (A) at the lower rear corner on the right side.
2) Remove the small escutcheon cover to access the SB1 connector
3) Unplug the SB1 connector.  This disconnects the PWB-SBL-R & PWB-SBL-L.
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 15
65 inch Models
SCREEN REPLACEMENT (continued)
73 inch Models
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 16
SCREEN REPLACEMENT (continued)
Screen Assembly Removal
(continued)
2) Open the Control Panel door and remove two screws (A).
3) Remove the remaining rear screw in the upper corner and carefully pull t\
he screen assembly
from the cabinet.
Screen Removal From the BEZEL-FRONT
1) Remove the screws (A) from the top, bottom and side rails.
2) Lift the Fresnel Lens and Lenticular screen from the BEZEL-FRONT.
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 17
SCREEN REPLACEMENT (continued)
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 18
Screen Replacement
CAUTION:Wear gloves when handling the Lenticular Screen and Fresnel Lens.
This prevents cuts and finger prints.   Do not place Fresnel Lens in the sun .
This may cause fire and heat related injuries.
Lenticular Screen and Fresnel Lens Replacement
1) Apply LENS-TAPE along the rear top edge of the Lenticular Screen.
2) Place the Fresnel Lens on top of the Lenticular Screen, and apply pressu\
re along the top edge.
3) Place the screens in the screen frame and reinstall the cushions, top, b\
ottom and side rails.
NOTE : The Lenticular Screen label must face the front and the Fresnel Lens lab\
el face the rear.
4) Reverse the Screen Removal Procedure and insert the screens in the Bezel\
.
Lenticular Screen and Fresnel Lens Removal
1) Remove the top, bottom and side HOLDER-SCREEN rails and their cushions f\
rom the Bezel.
2) Lift the screens as a single unit from the frame.
2. Separate the Lenticular Screen and Fresnel Lens. Note: When separating the Lenticular Screen from the Fresnel Lens, use caution\
while prying the Screen and Lens apart.  Use a slot type screw driver, and
remove the pressure sensitive double sided tape.
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 19
Speaker Replacement
1) Remove the Bezel screen assembly to access the speakers.
2) Remove 2 screws (A) and carefully slide the Speaker Assembly from the cabinet.
3) Disconnect the leads to the speaker.
4) Remove 4 screws (B) to remove the speaker from the speaker cover.
5)  Reverse the procedure to install a replacement speaker.
WD-65835 & WD-73835 (Only)
PWB-SBL-R & PWB-SBL-L Replacement
1) The screen Bezel Assembly must be removed to access the PWBs-SBL (refer to the V38 Bezel Removal
Procedure).
2) Remove 2 screws (A) to remove the PWB-SBL assembly from the Bezel.
3) Remove 4 screws (B) to remove the PWB from the assembly.
4) Reverse the procedure to install a replacement PWB-SBL.
SPEAKER
ASSEMBLY
V39++ SBL
ASSEMBLY
 
						

							
Page 20
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
OPTION MENU
1. Press the “MENU” button on the remote hand unit.
2. Press the buttons “2”, “4”, “7” and “0” in or\
der.
    (The screen will change to the option menu.)
 REMOTE CONTROL
Digital Signal Strength
1. Tune to a Digital Channel
2. From the Option menu scroll down and highlight Digital Signal Strength
3. Press Enter
SNR Recommended Levels: VSB = 15 to 35
64 QAM = 22 to 34
256 QAM = 27 to 37
Example of Digital Signal Strength Display
Signal Quality
Index (0-100)
Signal NoiseRatio
Tun er 0 Tune r 1 OOB Tun er
Fr eque nc y ( MHz ): 59 7 0 0
S igna l Le vel : 8 0 0
Mo dul atio n: 25 6 QAM Unk nown Unk no wn
Car rie r Loc k : Lo ck ed Unk nown Unk no wn
SQI 100 0 0
SNR 34.3 0 0
Correctable errors: 0 0 0
U nC or re ct a b el  er ro rs : 0 0 0
V39 OPTION MENU
V39+ & V39++ OPTION MENU