Mitsubishi WD-52527, V28+ Service Manual
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20052005
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MITSUBISHI ELECTRIC
ManualManual
Manual
ManualManual
LCD PROJECTION HDTV
V28 CHASSIS
V28 Chassis
WD-52327
WD-52527
WD-52527
WD-62527
Pb Solder
CAUTION:
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.
SPECIFICATIONS
• Power Input : AC 120V, 60Hz
• Power Usage : 295W
• Light Engine : 3 LCD (1280 x 720 pixels)
• Light Source : 110W
• Channel Range : Air VHF - 2~13, UHF - 14~69
Analog Cable - 1~25
Digital Cable - 1~35
• Antenna Input : 2 RF 75Ω unbalanced
• Tuning : 1 NTSC/A TSC/QAM
1 Out of Band for CableCARD
1 NTSC for PIP
• Cabinet Dimensions : [WD-52527 / WD-52528]
34"(H) x 49.6"(w) x 17.8"(D)
: WD-62527 / WD-62528
40.5"(H) x 58.3"(W) x 19.9"(D)
TM
• Input Level : VIDEO IN JACK (RCA T ype)
1.0Vp-p 75W unbalanced
: AUDIO IN JACK (RCA T ype)
-4.7dBm 43kW unbalanced
: S-VIDEO IN JACK
(Y/C separate type)
Y:1.0 Vp-p C:0.286Vp-p(BURST)
75W unbalanced
: COMP / Y , Cr, Cb (RCA T ype)
Y: 1.0 Vp-p Cr, Cb: 700mVp-p
• Output Level : VIDEO OUT JACK (RCA T ype)
1.0Vp-p 75W unbalanced
: AUDIO OUT JACK (RCA T ype)
-4.7dBm 4.7kW unbalanced
V28+ Chassis
WD-52528
WD-62528
• Weight : [WD-52527 / WD-52528]
110 lbs
: [WD-62527 / WD-62528]
133 lbs
• Speakers (8 Ohms 10W)
: 2-5 ½ x 2 ¼ inch
• Design specifications are subject to change without notice.
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Road, Irvine, CA 92618-1904
Copyright © 2005 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
• Digital : IEEE-1394 I/O Jacks
: AC-3 Digital Audio Output
(RCA T ype)
TM
: HDMI
Pb Solder
.
: Lead-Free solder PWBs
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
CONTENTS
INTRODUCTION ................................................................................................................................5
PRODUCT SAFETY NOTICE ...........................................................................................................5
SAFETY PRECAUTIONS .................................................................................................................6
DISASSEMBLY .................................................................................................................................7
Front Cabinet Components .............................................................................................................7
Chassis Removal ............................................................................................................................8
Chassis Disassembly / Accessing PWBs.....................................................................................12
Light Engine Replacement ............................................................................................................17
SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS..................................................... 22
Removal of the Lenticular Screen and Fresnel Lens ...................................................................... 22
Installation of the Lenticular Screen and Fresnel Lens................................................................... 24
ADJUSTMENTS ............................................................................................................................... 25
Option Menu & Defaults ................................................................................................................25
LED Indicator Diagnostics.............................................................................................................26
Error Codes Operational Check..................................................................................................... 27
Remote Operational Mode ............................................................................................................ 28
Service Adjustment Mode ............................................................................................................. 28
Service Adjustment Mode Operation ....................................................................................28
Transferring data ..................................................................................................................29
Light Engine Adjustment ............................................................................................................... 30
T est Signal activation ........................................................................................................... 30
Preliminary .......................................................................................................................... 30
Trapezodial Distortion Adjustment........................................................................................ 31
Rotation Adjustment.............................................................................................................31
Hortizontal & V ertical Position.............................................................................................. 32
TROUBLESHOOTING ..................................................................................................................33
MICRO / TERMINAL PWBs ................................................................................................. 33
POWER-PWB ..................................................................................................................... 34
OPTICAL ENGINE ............................................................................................................... 35
Protect Lines .......................................................................................................................36
USING LEAD FREE SOLDER .......................................................................................................... 37
CHIP P ARTS REPLACEMENT ......................................................................................................... 38
REPLACEMENT P ARTS .................................................................................................................. 39
Parts Ordering .............................................................................................................................. 39
Critical and Warranty Parts Designation........................................................................................ 39
Parts T olerance Codes.................................................................................................................. 39
Quick Reference List .................................................................................................................... 40
SERVICE PARTS LIST .................................................................................................................... 41
SCREEN ASSEMBL Y PARTS LIST.................................................................................................. 50
CIRCUITRY BLOCK DIAGRAMS ..................................................................................................... 52
Main Power Supply....................................................................................................................... 52
Lamp Ballast DC Supply............................................................................................................... 53
Page 3
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Fans Power Supply....................................................................................................................... 53
Analog Video Signal Path .............................................................................................................54
Digital Video Signal Path ..............................................................................................................55
Sound Signal Path ........................................................................................................................ 56
Command Input Circuitry............................................................................................................... 57
Serial Data Control Lines ..............................................................................................................57
Lamp Control Circuitry ..................................................................................................................58
Shutter Control.............................................................................................................................. 58
Lamp, Engine and Fan’s Protect circuitry ..................................................................................... 59
Page 4
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
INTRODUCTION
This service manual provides service instructions for LCD Projection TV Models and Chassis:
V28 Chassis V28+ Chassis
WD-52527 WD-52528
WD-62527 WD-62528
This service manual includes:
1. Assembly and disassembly instructions for the front and rear cabinet components.
2. Servicing of the Lenticular Screen and Fresnel Lens.
3. Servicing down to major components, chassis, PWBs, Light Engine, Lamp Ballast, etc..
4. Electrical adjustments.
5. Optical Adjustments.
6. Lead Free Soldering.
7. Chip parts replacement procedures.
8. Simplified circuit path diagrams.
The parts list section of this service manual includes:
1. Cabinet and screen parts.
2. Electrical parts.
Block diagrams of the above listed models are included in this service manual for better understanding of the circuitry .
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in television receivers have special safety related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by
using replacement components rated for higher voltage, wattage, etc.
Replacement parts which have special safety characteristics are identified in this service manual.
Electrical components having such features are identified by shading on the schematic diagram and by bold type in
the parts list of this service manual. Therefore, the replacement for any safety part should be identical in value
and characteristics.
The PWBs used in the V28 and V28+ chassis are constructed using Lead-Free solder . When
Pb Solder
servicing use only recommended Lead-Free solder (refer to page 37).
CableCARD is a trademark of Cable T elevision Laboratories, Inc.
TV Guide On Screen is a registered trademark of Gemstar Development Corp.
HDMI is a trademark of HDMI Licensing, LLC.
Page 5
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
SAFETY PRECAUTIONS
NOTICE: Observe all cautions and safety related notes located inside the receiver cabinet and on the
receiver chassis.
WARNING:
1. Operation of this receiver outside the cabinet or with the cover removed presents a shock hazard
from the receiver's power supplies. Work on the receiver should not be attempted by anyone who is
not thoroughly familiar with the precautions necessary when working on high voltage equipment.
2. When service is required, observe the original lead dress. Extra precaution should be taken to
assure correct lead dress in the high voltage area. Where a short-circuit has occurred, replace those
components that indicate evidence of overheating.
WARNING ... RISK OF EYE INJUR Y
Do not look into the light source, lens or mirror when operating the TV
Leakage current check
Before returning the receiver to the customer, it is recommended that leakage current be measured according to the
following methods.
1. Cold Check
With the alternating current (AC) plug removed from the AC source, place a jumper across the two AC plug
prongs. Connect one lead of an ohm meter to the AC plug and touch the other lead to each exposed metal part
(i.e. antennas, handle bracket, metal cabinet, screw heads, metal overlay , control shaf ts, etc.), particularly any
exposed metal part that has a return path to the chassis. The resistance of the exposed metal parts having a
return path to the chassis should be a minimum of 1Meg Ohm. Any resistance below this value indicates an
abnormal condition and requires corrective action.
2. Hot Check ...Use the circuit shown below to perform the hot check test.
1. Keep switch S1 open and connect the receiver to the measuring circuit. Immediately after
connection, and with the switching devices of the receiver in their operating positions, measure the
leakage current for both positions of switch S2.
2. Close switch S1, energizing the receiver . Immediately after closing switch S1, and with the
switching devices of the receiver in their operating positions, measure the leakage current for both
positions of switch S2. Repeat the current measurements of items 1 and 2 after the receiver has
reached thermal stabilization. The leakage current must not exceed 0.5 milliampere (mA).
Page 6
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
CABINET FRONT DISASSEMBLY
SPEAKER GRILLE Removal
Pull the SPEAKER-GRILLE away from the cabinet to remove.
SCREEN-ASSY Removal
1 ) Remove 10 screws (a) from the upper cabinet rear cover (3 screws on each side and 4 screws across the
top).
2 ) Remove screws (b) along the bottom of the SCREEN-ASSY (8 screws on 52 inch models, and 12 screws
on 62 inch models),
3 ) Unplug the LL connector to the front CONTROL-PANEL.
4 ) Lift the SCREEN-ASSY up slightly and then pull away from the cabinet.
Page 7
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
CHASSIS REMOVAL
BACK-COVER Removal
1 ) Remove 9 screws (a)
2 ) Remove 13 screws (b)
3 ) Pull the COVER-BACK from the cabinet.
Metal Support Plate Removal
Remove 4 screws (a) to remove the metal support plate,
(a)
Page 8
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Chassis Mounting Screws Removal
Remove the two chassis mounting screws (b).
(b)
Release Cable Clamps & Disconnect CE Connector
Cable
Clamp
CE
Connector
Cable
Clamp
(b)
Cable
Clamp
Page 9
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
On the right side of the chassis (from the rear):
1 ) Release the AC Cord from it’s mounting.
2 ) Unplug ES1 connector to the speakers.
AC Cord
Chassis removal from the Cabinet
Carefully rotate the chassis clockwise to slide it from the cabinet.
ES1 Connector
Page 10
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Complete Chassis Removal
T o completely remove the chassis from the cabinet, the folowing connectors must be unplugged.
• PL plug to the Ballast (on the left side of the chassis).
• KA plug from the PWB-RISER (right side of chassis).
• FB, FC and J8F01 at the PWB-FORMA T (right side of chassis).
PL
KA
Page 11
J8F01
FB
FC
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Chassis Disassembly / Accessing PWBs
Note: Although not individually indicated, unplug the required connectors in each
disassembly step.
Chassis Sequence of Disassembly
REMOVE
Chassis Top Cover
(Fig . 1 )
REMOVE
Assy PWB-TERMINAL
(Fig . 2 )
REMOVE
PWB-POWER
(Fig . 3 )
REMOVE
Chassis Top Shield
(Fig. 3)
REMOVE
Chassis Rear Shield
(Fig. 4)
REMOVE
PWBs MICRO / FMT/ RISER
(Figs. 5 & 6)
REMOVE
PWB-DM
(Fig. 7)
Page 12
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Chassis Cover Removal (Figure 1)
1 ) Remove the 4 screws (a).
2 ) Lift the Cover from the chassis.
Figure 1: Chassis Cover Removal
Assy PWB- TERMINAL Removal (Figure 2)
1 ) Remove 7 screws (a) to remove
the TERMINAL-INLA Y.
2 ) Remove 3 screws (b) to remove
the Assy PWB-TERMINAL.
Figure 2: ASSY PWB-TERMINAL Removal
Page 13
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
PWB-POWER Removal (Figure 3)
1) Remove four screws (b).
2 ) Disconnect all connectors to PWB-POWER.
3 ) Lift PWB-POWER from the chassis.
Chassis Upper Shield Removal (Figure 3)
1) Remove seven screws (c).
2 ) Lift the Shield from the chassis.
Figure 3: PWB-POWER and Chassis Upper Shield
Page 14
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Chassis Rear Shield Removal (Figure 4)
1 ) Remove nine screw (c).
2 ) Remove two nuts (c1).
3 ) Pull off Chassis Rear Shield.
Figure 4: Chassis Rear Shield Removal
PWB-MICRO Removal
Referring to Figure 5.
1 ) Remove three screws (d).
2 ) Unplug PWB-MICRO from PWB-RISER
and remove from the chassis.
Page 15
Figure 5: PWB-MICRO Mounting Screws
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
PWB-RISER and PWB-FORMA T Removal
Referring to Figure 6.
1) Remove one screw (e).
2 ) Unplug and remove PWBs MICRO, RISER
and FORMA T .
PWB-DM Removal (Figure 7)
1 ) Remove three screws (g) holding the PWB-
MICRO Support Bracket.
2 ) Remove the Support Bracket.
3 ) Remove the five screws (h).
4 ) Remove the PWB-DM from the chassis.
Figure 6: PWBs MICRO, RISER and FORMA T Removal
Page 16
Figure 7: PWB-DM Removal
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Light Engine Replacement
Light Engine and Associated Components
The exploded view below shows the the Light Engine and those components attached directly to the Engine.
When replacing the Light Engine, these components must be removed from the original Light Engine.
Page 17
NOTE: To replace the Lamp Bal-
last the Light Engine must be removed
from the cabinet but doesn’t need
be completely disassembled.
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Light Engine Replacement
Preliminary
Refer to the chassis removal procedure and remove the BACK-COVER and Metal Support Plate (page 8)
1 ) Remove (3) screws (a) from Filter Cover Holder
Light Engine Removal Procedure
The following steps describe how to remove the Light
Engine from the cabinet and those parts that are not
included in a replacement Engine
(a)
(a)
(a)
Light Engine (Rear View)
2 ) Remove fixing screws (1) & (2) to remove
the SLIDE-LOCK-MATE
3a) Loosen [A-1] & [A-2] so that they do not
touch [A-3]. (4MM Allen wrench)
3b ) Loosen lock nuts (1) and (2). (8MM open
end wrench)
3c) Turn [A-3] CCW so the [A-3] bolt clears the
Engine Plate. (5MM Allen wrench)
Page 18
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Light Engine Replacement
4 ) Remove one screw (b) securing engine plate and base
5 ) Remove two screws (c) from Fan Plate and remove
Fan Plate
6 ) Disconnect all connectors
(b)
(c)
7 ) Remove DVI cable and (2) connectors
(c)
8 ) Remove wiring from three wiring clamps (d).
(d)
(d)
(d)
9 ) Remove 4 screws (f) from the Lamp Fan.
(f)
(f)
Page 19
(f)
(f)
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
10 ) Remove (4) screws (g) from Lamp Fan Bracket
(g)
(g)
12 ) Disconnect all connectors from Interface PWB and
remove (2) screws (k) from Bracket
(g)
(g)
1 1 Loosen (2) screws (h) to remove Ballast Cable
(h)
(h)
13) Remove (4) screws (n) from Intake Cover
(n)
(n)
(k)
(k)
14 ) Remove four screws (a), (b), (c) and (d) to separate
Light Engine from Engine plate
(a)
(b)
(n)
(n)
Screw (c)
(c)
Page 20
Screw (d)
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
15) Lift the Engine from Engine plate leaving the
Lamp Duct fan, Lamp Duct Intake and Ballast.
(d)
INSTALLATION
1) Reverse the above steps.
2 ) Copy White Balance Data to PWB-FMT (refer to page 29).
3 ) Refer to the Adjustment Section and perform Trapezodial Distortion, Rotation and
Position adjustments as necessary.
Page 21
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS
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 Removal
1. Remove the screen assembly as shown in the Cabinet Disassembly procedure.
2. Remove the four screws (a) to remove the bottom of the SCREEN-FRAME-BOTTOM . (Figure 1)
3. From the front of the screen assembly, slide the BEZEL out the bottom of the Screen Frame. (Figure 2)
4. From the rear of the screen assembly, carefully slide the Lenticular Screen and Fresnel Lens combination
from the Screen Frame. (Figure 3)
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.
Figure 1: SCREEN-FRAME-BOTTOM Removal (Rear View)
Page 22
MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Figure 2: BEZEL Removal (Front View)
Figure 3: Lenticular Screen & Fresnel Lens Removal (Rear View)
Page 23
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