How it Works
Mitsubishi
Loading...
WS-73711
Service Manual
83 pgs1.71 Mb0
Service Manual
14 pgs3.82 Mb0
User Manual
92 pgs3.01 Mb0
Owner’s Manual
25 pgs3.31 Mb0
Service Manual
30 pgs275.67 Kb0
Service Manual
71 pgs2.42 Mb0

Mitsubishi WS-73711, WS-65712, WS-65711, WS-55711, WS-65611 Service Manual

...
MITSUBISHI ELECTRIC
Service Manual
PROJECTION TELEVISION V21 / V21+ / V21++ CHASSIS
20022002
20022002
V21
MODELS
WS-48511 WS-55511 WS-65511
WS-B55
V21+
MODELS
WS-65611
V21++
MODELS
WS-55711 WS-65711 WS-65712 WS-73711
WS-65611
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 : 275W (All but WS-73711) 300W (WS-73711 only)
• Frequency Range : VHF 54 ~ 470MHz UHF 470 ~ 806MHz
• Antenna Input : VHF/UHF 75Ω unbalanced 2 - NTSC 1 - ATV/QAM
• CRT Size : [7 inches]
: [9 inches] WS-73711 only
• High Voltage : 32.0kV (at 0A)
• Cabinet Weight and Demensions
Model Weight Height Width Depth WS-48511 175.5 lbs. 49" 44.5" 24" WS-55511 WS-55711 WS-65511 WS-65611 WS-65711 WS-65712 251 lbs. 61.7" 58.2" 28.4" WS-73711 410 lbs 65.7" 65.2" 30"
WS-B55
• Weight and dimensions shown are approximate.
• Design specifications are subject to change without notice.
• AC-3® is a registered trademark of Dolby Laboratories, Inc.
238 lbs. 50.3" 50.6" 28" 266 lbs. 50.3" 50" 28" 337 lbs. 61.9" 59" 28.1"
336.5 lbs 61.9" 59" 28.1" 356 lbs 61.6" 58.2" 28"
238 lbs. 50.3" 50.6" 28"
• Speakers (8 Ohms 10W)
[WS-48511] : 2 - 5" round [WS-B55 / WS-55511 / WS-65511 / WS-65611]
: 2 - 6" round
[WS-55711 / WS-65711 / WS-73711]
: 2 - 6.5" round, 2 - 3" tweeters
[WS-65712] : 2 - 7" oval, 2 - 3" tweeters
• Input Level : VIDEO IN JACK (RCA Type)
1.0Vp-p 75Ω unbalanced : AUDIO IN JACK (RCA Type)
-4.7dBm 43kΩ unbalanced : S-VIDEO IN JACK
(Y/C separate type) Y:1.0 Vp-p C:0.286Vp-p(BURST) 75Ω unbalanced
: COMP / Y, Cr, Cb (RCA Type)
Y: 1.0 Vp-p Cr, Cb: 700mVp-p
: ATV / Y(G), Pr(R), Pb(B), H, V
Y: 1.0Vp-p with sync 75Ω (BNC) Pr, Pb: 700mV 75Ω H, V: 3.0Vp-p 75Ω
: VGA / R,G,B,V,H (15 pin D)
• Output Level : VIDEO OUT JACK (RCA Type)
1.0Vp-p 75Ω unbalanced
: AUDIO OUT JACK (RCA Type)
-4.7dBm 4.7kΩ unbalanced
• Digital Interface
: IEEE-1394 I/O Jacks : AC-3® Digtal Audio Output
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Road, Irvine, CA 92618-1904
Copyright © 2002 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CONTENTS
INTRODUCTION ................................................................................................................................5
PRODUCT SAFETY NOTICE ............................................................................................................. 5
SAFETY PRECAUTIONS ................................................................................................................... 6
DISASSEMBLY
WS-48511 Cabinet Front Disassembly ............................................................................................ 7
WS-48511 Cabinet Rear Disassembly ............................................................................................ 8
WS-B55 / WS-55511 / WS-65511 Cabinet Front Disassembly ........................................................ 9
WS-65611 Cabinet Front Disassembly .......................................................................................... 10
WS-55711 / WS-65711 / WS-73711 Cabinet Front Disassembly ................................................... 11
WS-B55 / WS-55511 / WS-65511 / WS-65611 / WS-55711 / WS-65711 / WS-73711
Cabinet Rear Disassembly ................................................................................................... 12
WS-65712 Cabinet Front Disassembly ......................................................................................... 13
WS-65712 Cabinet Rear Disassembly .......................................................................................... 14
SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS
Lenticular Screen and Fresnel Lens Removal......................................................................... 15
WS-48511 ............................................................................................................................ 15
WS-B55 / WS-55511 / WS-65511 ........................................................................................ 16
WS-55711 / WS-65611 / WS65711 / WS-65712 / WS-73711 ............................................... 17
Lenticular Screen and Fresnel Lens Installation .................................................................... 18
SERVICING THE DIAMONDSHIELDS
TM
r
DiamondShield TM Removal & Installation ...................................................................................... 19
CABINET SEPARATION (65 and 73 inch)
WS-65712..................................................................................................................................... 20
WS-65511 ..................................................................................................................................... 21
WS-65611 / WS-65711 / WS-73711 .............................................................................................. 21
SERVICING PCBs
Chassis and DM Module Removal ................................................................................................. 22
PCB Locations.............................................................................................................................. 23
Main Components Location........................................................................................................... 23
DM Module Main Components Location ........................................................................................ 24
CRT REPLACEMENT
CRT Removal ................................................................................................................................25
CRT Installation ............................................................................................................................ 26
ELECTRICAL ADJUSTMENTS
Test Equipment ............................................................................................................................. 28
Initial Setup ................................................................................................................................... 29
LED Indicator Diagnostics ............................................................................................................. 30
Remote Control Operational Mode ................................................................................................ 30
Circuit Adjustment Mode............................................................................................................... 31
On Screen Display Position Adjustment Mode .............................................................................. 32
Convergence Adjustment Mode ..................................................................................................... 32
E2PROM Replacement ................................................................................................................. 34
Adjustment Items List ................................................................................................................... 34
Adjustment Test Points ................................................................................................................. 37
Adjustment Procedures ................................................................................................................ 38
Audio Circuit ........................................................................................................................ 38
High Voltage Regulation ....................................................................................................... 39
Main/Sub Y Level ................................................................................................................. 39
Side by Side Sub Picture Tint .............................................................................................. 40
Side by Side Sub Picture Color ............................................................................................ 40
Page 3
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CRT Cutoff ........................................................................................................................... 41
White Balance (NTSC) ......................................................................................................... 41
White Balance (HD) ............................................................................................................. 42
Cb, Cr Offset ........................................................................................................................ 42
Black Level .......................................................................................................................... 43
Sub Contrast ....................................................................................................................... 43
Dynamic Focus Preset ........................................................................................................ 44
Lens Focus .......................................................................................................................... 44
Electrostatic Focus & Alignment Magnet Adjustment .......................................................... 45
On Screen Display Character Position ................................................................................. 45
Deflection/Convergence Geometry Presets .......................................................................... 46
Deflection Circuit Geometry Adjustments ............................................................................. 47
Convergence Circuit Geometry Adjustments ........................................................................ 48
Centering and Static Convergence ....................................................................................... 49
Coarse Convergence Adjustments ....................................................................................... 50
Fine Convergence Adjustments ............................................................................................ 51
CHIP PARTS REPLACEMENT ......................................................................................................... 52
REPLACEMENT PARTS
Parts Ordering .............................................................................................................................. 53
Critical and Warranty Parts Designation........................................................................................ 53
Parts Tolerance Codes .................................................................................................................. 53
Quick Reference List .................................................................................................................... 54
Service Parts List.......................................................................................................................... 55
Screen Parts List .......................................................................................................................... 70
CIRCUITRY BLOCK DIAGRAMS
Standby Supplies Regulator .......................................................................................................... 74
Switched Supplies Regulator ........................................................................................................ 75
DM Power Supply ......................................................................................................................... 76
Video / Color A/V Switch Circuit ................................................................................................... 77
Video / Color Signal Path .............................................................................................................. 78
Sync Signal Path .......................................................................................................................... 79
Deflection / HV.............................................................................................................................. 80
X-Ray Protect ............................................................................................................................... 80
Sound Circuit ................................................................................................................................ 81
Convergence ................................................................................................................................. 82
Control Circuitry ............................................................................................................................ 83
Section 2 .... Schematic Diagrams
SCHEMATIC DIAGRAMS
Overall Block Diagram ................................................................................................................... 1
PCB-MAIN ..................................................................................................................................... 2
PCB-POWER................................................................................................................................. 3
PCB-TERMINAL ............................................................................................................................ 4
PCB-SIGNAL-1 (AV I/O) .................................................................................................................. 5
PCB-SIGNAL-2 (MICRO) ................................................................................................................. 6
PCB-SIGNAL-3 (VIDEO / CHROMA) ............................................................................................... 7
PCB-3DYC ..................................................................................................................................... 8
PCBs-CONV GEN / JUNGLE..........................................................................................................9
PCBs - CRT / CONTROL / SVM / DBF / DM POWER .................................................................. 10
PCB-2HDW-1 ............................................................................................................................... 11
PCB-2HDW-2) .............................................................................................................................. 12
PCB-2HDW-3 ............................................................................................................................... 13
PCB LAYOUT DIAGRAMS ............................................................................................................... 14
Page 4
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
INTRODUCTION
This service manual provides service instructions for the V21, V21+ and V21++ PTV chassis types. The specific models for each chassis type are listed below. Service personnel should read this manual thoroughly before servicing these chassis.
V21 Chassis V21+ Chassis V21++ Chassis
WS-48511 WS-65611 WS-55711 WS-55511 WS-65711 WS-65511 WS-65712
WS-B55 WS-73711
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 printed circuit boards (PCBs).
4. CRT replacement procedure.
5. Electrical adjustments.
6. Chip parts replacement procedures.
7. Circuit path diagrams.
The parts list section of this service manual includes:
1. Cabinet and screen parts.
2. Electrical parts.
Schematic and block diagrams of the above listed models are included in this service manual for better under­standing of the circuitry. PCB drawings are also included for easy location of parts and test points.
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. The replacement for any safety part should be identical in value and characteristics.
Page 5
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
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. Do not install, remove or handle the picture tubes in any manner unless shatterproof goggles are worn. People not so equipped should be kept away while the picture tube is being handled. Keep the picture tube away from the body while handling.
3. 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.
X-Radiation warning
The surface of the cathode ray tubes (CRTs) may generate X-Radiation, so take proper precautions when servic­ing. It is recommended that a lead apron be used for shielding while handling the CRT. Use this method if possible.
When replacing the CRTs, use only the designated replacement part since it is a critical component with regard to X-Radiation. High voltage must be set as prescribed under the section titled Electrical Adjustments.
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 shafts, 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 1Mega 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
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET DISASSEMBLY (FRONT VIEW)
WS-48511
*Refer to the Parts List for Part Numbers
Front Cabinet Disassembly
1. Remove the Speaker Grille by pulling forward.
2. Remove the Board Front by removing screws (a).
3. Remove the screws (b) holding the Screen Assembly.
4. Lift the Screen Assembly up and away from the cabinet.
Page 7
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET DISASSEMBLY (REAR VIEW)
WS-48511
*Refer to the Parts List for Part Numbers
Rear Cabinet Disassembly
1. Remove the Back Board by removing screws (a)and (b)).
2. Remove 4 screws (c) securing the Board Slide.
3. Remove 4 screws (d) holding each Board Shelf.
4. Be certain that all cables and connectors between the Light Box Assembly and external items are disconnected (e.g. speaker plugs, etc.).
5. Remove 3 screws (c) and screw (f). Then slide the Light Box Assembly from the cabinet.
Page 8
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET DISASSEMBLY (FRONT VIEW)
WS-B55 / WS-55511 / WS-65511
*Refer to the Parts List for Part Numbers
Front Cabinet Disassembly
1. Remove the Speaker Grille by pulling forward.
2. Remove the Board Front by removing 4 screws (a).
3. Remove the 4 screws (b) holding the Screen Assembly.
4. Lift the Screen Assembly up and away from the cabinet.
Page 9
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET DISASSEMBLY (FRONT VIEW)
WS-65611
*Refer to the Parts List for Part Numbers
Front Cabinet Disassembly
1. Remove the Speaker Grille by pulling forward.
2. Remove the Board Front by removing screws (b)
3. Remove the Control Panel by removing two screws (a).
4. Remove the four screws (c) holding the Screen Assembly.
5. Lift the Screen Assembly up and away from the cabinet.
Page 10
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET DISASSEMBLY (FRONT VIEW)
WS-55711 / WS-65711 / WS-73711
*Refer to the Parts List for Part Numbers
Front Cabinet Disassembly
1. Remove the Speaker Grilles and Unit Front by pulling forward.
2. Remove 2 screws (a) to remove the Control Panel.
3. Remove the Board Front by removing 4 screws (b).
4. Remove the 4 screws (c) holding the Screen Assembly.
5. Lift the Screen Assembly up and away from the cabinet.
Page 11
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET DISASSEMBLY (REAR VIEW)
WS-B55 / WS-55511 / WS-65511 / WS-65611/ WS-55711 / WS-65711 / WS-73711
*Refer to the Parts List for Part Numbers
Rear Cabinet Disassembly
1. Remove screws (a) holding the Back Board.
2. Remove 4 screws (a) holding the Board Slide
3. Remove the 4 screws (b) holding each Board Shelf.
4. Remove screw (e) and 3 screws (c) securing the Light Box Assembly.
5. Be certain that all cables and connectors between the Light Box Assembly and external items are disconnected (e.g. speaker plugs, etc.).
6. Slide the Light Box out the rear of the Cabinet.
Page 12
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET DISASSEMBLY (FRONT VIEW)
WS-65712
*Refer to the Parts List for Part Numbers
Front Cabinet Disassembly
1. Remove the Speaker Grille by pulling forward.
2. Remove 2 screws (a) securing the Front Panel.
3. Slide the Front Panel 1/2 inch to the right, then pull away from the TV.
4. Remove 6 screws (b) to remove the Board Front.
5. Unplug the LF connector.
6. Remove the 4 screws (c) securing the Screen Assembly.
7. Lift the Screen Assembly up and away from the cabinet.
Page 13
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET DISASSEMBLY (REAR VIEW)
WS-65712
*Refer to the Parts List for Part Numbers
Rear Cabinet Disassembly
1. Remove screws (a) and (b) holding the Back Board.
2. Remove the 4 screws (c) holding each Board Slike.
3. Remove the 3 screws (c) and screw (e) securing the Light Box Assembly.
4. Disconnect cabling to the front panel (Control Panel, Speakers, Inputs, etc.)
4. Slide the Light Box out the rear of the Cabinet.
Page 14
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
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.
WS-48511
Lenticular Screen and Fresnel Lens Removal
1. Remove the screen assembly shown in the Cabinet Disassembly procedure.
2. Remove the Top, Bottom and Side Screen Holders.
3. Carefully lift the Lenticular Screen and Fresnel Lens combination from the Screen Frame assembly.
Note: When separating the Lenticular Screen from the Fresnel Lens, use caution
while prying the Screen and Lens apart. Use a slot type screw drive, and remove the pressure sensitive double sided tape.
Page 15
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
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.
WS-B55 / WS-55511 / WS-65511
Lenticular Screen and Fresnel Lens Removal
1. Remove the screen assembly shown in the Cabinet Disassembly procedure.
2. Remove the screws (a) securing the Screen Holder.
3. Slide the Lenticular Screen and Fresnel Lens from the Screen Frame.
Note: When separating the Lenticular Screen from the Fresnel Lens, use caution
while prying the Screen and Lens apart. Use a slot type screw drive, and remove the pressure sensitive double sided tape.
Page 16
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
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.
WS-55711 / WS-65611 / WS-65711 / WS-65712 / WS-73711
Lenticular Screen and Fresnel Lens Removal
1. Remove the screen assembly shown in the Cabinet Disassembly procedure.
2. Remove the Screen Frame top section by removing 4 screws (a).
3. Carefully grasp the Lenticular Screen and Fresnel Lens combination and pull upward and out
of the Screen Frame Assembly.
Note: When separating the Lenticular Screen from the Fresnel Lens, use caution
while prying the Screen and Lens apart. Use a slot type screw drive, and remove the pressure sensitive double sided tape.
WS-55711 WS-65611 WS-65711 WS-73711
WS-65712
Page 17
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
g
SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS
2. Lenticular Screen and Fresnel Lens Installation.
Note: Store the Lenticular Screen and Fresnel Lens in a cool dry place. High humidity may
deform the Lenticular Screen and Fresnel Lens.
1. Apply double coated tape (Part # LENS-TAPE) along the top front edge of the Fresnel Lens as shown below. Refer to the Table below for proper tape length.
2. Place the Fresnel Lens on top of the Lenticular Screen and apply pressure at the top edge to bond them together as shown below.
Model
WS-48511 48" 41.76"
WS-B55 55" 47.8" WS-55511 55" 56.5" WS-55711 55" 56.5" WS-65511 65" 56.5" WS-65611 65" 56.5" WS-65711 65" 56.5" WS-65712 65" 56.5" WS-73711 73" 63.51"
Screen
Size
Page 18
Tape
Len
th
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
SERVICING THE DIAMONDSHIELD™
1. DiamondShield™ Removal Procedure
The location of the DiamondShieldTM molding clips varies between models, top and bottom, or sides. Use the appropriate disassembly procedure given below.
Note:
Wear gloves when handling the DiamondShield™ to prevent finger prints.
Top & Bottom Molding Clips
1. Gently insert a small screwdriver between the DiamondShield™ and one end of the clip to pry the clip loose.
Side Molding Clips
1. Gently insert a small screwdriver between the DiamondShield™ and one end of the clip to pry the clip loose.
2. Remove both clips by pulling them toward you.
3. Carefully insert a small screwdriver into the gap at the top/center point of the Shield and pull the Shield slightly away from the unit. Place your hands at the points shown and gently bow the Shield toward you and remove from the unit. Then re-install the two clips.
2. DiamondShield™ Installation Procedure
*(See the Parts List for DiamondShield™ part numbers)
To install the DiamondShieldTM, reverse the above Removal Procedure.
2. Remove both clips by pulling them toward you.
3. Carefully insert a small screwdriver into the gap at the side/center point of the Shield and pull the Shield slightly away from the unit. Place your hands at the points shown and gently bow the Shield toward you and remove from the unit. Then re-install the two clips.
Page 19
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET SEPARATION
Mitsubishi 65 and 73 inch Projection TVs have been assembled in two pieces. These pieces may be separated for easier delivery and setup. The cabinet separation procedure requires two persons and varies between models.
WS-65712 Cabinet Separation Procedure
Figure 1
1. Remove the Speaker Grille by pulling forward.
2. Remove the two Front Cover screws (a).
3. To remove the Front Cover, slide to the right approximately 1/2”, then pull away from the TV.
Figure 2
4. Remove Screw (b) from the front board.
5. Disconnect the LF connector.
Figure 3
6. Remove screw (c) on each side of the cabinet.
7. Remove the plastic cover on each side.
Figure 4
8. Slide the top of the cabinet top forward.
Figure 1
Figure 5
9. Carefully lift the cabinet top until the interlock tabs clear the cabinet bottom
Figure 6
10. Carefully place the cabinet top on the floor
as shown.
Figure 3
Figure 4
Figure 2
Figure 5
Figure 6
Page 20
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CABINET SEPARATION PROCEDURE
(WS-65511 / WS-65611 / WS-65711 / WS-73711)
WS-65511 Cabinet Separation Precedure
1. Remove the Screen Assembly and disconnect all cable harnesses between the Frame Assem­bly and the PCB-SIGNAL, refer to Cabinet Front Disassembly.
2. Remove the 4 screw covers (a).
3. Remove 4 screws (b) securing the top and bottom cabinet sections .
4. Carefully lift the cabinet top and place it on the floor.
5. Place the cabinet bottom in the desired loca­tion.
6. Reverse the procedure and mount the cabinet top on the cabinet bottom.
7. Reinstall the the Screen Assembly and connect all cable harnesses between the Screen Assembly and the PCB-SIGNAL.
WS-65611 / WS-65711 / WS-73711 Cabinet Separation Precedure
1. Remove the 4 screw covers (a).
2. Remove 4 screws (b) securing the top and bottom cabinet sections .
3. Carefully lift the cabinet top and place it on the floor.
4. Place the cabinet bottom in the desired loca­tion.
5. Reverse the procedure and mount the cabinet top on the cabinet bottom.
WS-65511
WS-65611 WS-65711 WS-73711
Page 21
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
Main Chassis Removal
Chassis and DM Module Removal
The chassis and DM Module can be removed as a single unit.
1. Undo the cable wire ties to the Front Panel, Speakers, CRTs, etc.
2. Remove screw (a) securing the Main Chassis [and screws (b) in model WS-65712] .
3. Release the Chassis Locks on each side of the chassis.
3. Slide the Chassis and DM Module out the rear of the unit.
5. Tilt upward to access the bottom of the main chassis.
NOTE: If the chassis cannot be removed with the DM Module, due to insufficient cable length:
1. Perform Step 1 through 3 above.
2. Remove 1 screw (c).
3. Slide the chassis only out the rear of the unit.
Page 22
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
PCB Locations
Main Components Location
Page 23
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
DM Module Main Components Location
E2P
MODULE
DM
POWER
SUPPLY
DE-
MODULATOR
AT V
TUNER
FLASH CARD SLOT
COVER
Page 24
MODELS: WS-48511 / WS-55511 / WS-55711 / WS-65511 / WS-65611 / WS-65711 / WS-65712 / WS-73711 / WS-B55
CRT REPLACEMENT
1. Removal of the CRT
Caution! High voltage should be completely discharged prior to CRT removal.
Since The CRTs receive high voltage from the HV Block, discharge by shorting the open end of the respective high voltage cable to chassis ground.
Note: Refer to the Cabinet Disassembly Procedures when performing steps 1 through 4.
1. Remove the Speaker Grille, Front Board, and Screen Assy.
2. Remove the Back Board.
3. Remove the Anode Lead Wire from the CR Block.
4. Remove the PCB-CRT.
5. Remove 4 hex-screws "a" retaining the Optical Unit. [Figure 5-1]
6. Remove 4 screws "b" retaining the Lens.
Note: DO NOT loosen the RED screws. Doing so will break the seal between the
C-Element and the # 6 Lens, causing leakage of the CRT Coolant.
7. Remove 4 screws "c" retaining the CRT. [Figure 5-2]
8. Remove the Deflection Yoke from the neck of the CRT. [Figure 5-7]
Figure 5-1
Figure 5-2
Note: The 4 spring-loaded screws shown
in Fig 5-2 and labeled as "DO NOT REMOVE", should not be loosened under any circumstance. Doing so will break the seal between the CRT and the CRT-Spacer, causing leakage of the CRT Coolant.
Page 25
Loading...
+ 58 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use