Mitsubishi WT-46807, WS-73907, WS-65857, WS-65807, WS-55907 User Manual
...
2000
Service
MITSUBISHIELECTRIC Manual
PROJECTION TELEVISION
V17 / V17+ / V17++ CHASSIS
V17 |
V17+ |
V17++ |
MODELS |
MODELS |
MODELS |
WT-46807 |
WS-55857 |
WS-55907 |
WS-55807 |
WS-65857 |
WS-65907 |
WS-65807 |
|
WS-73907 |
WS-73907
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 |
: AC 120V, 60Hz, 320W |
|
• Frequency |
: VHF |
54 ~ 470MHz |
Range |
UHF |
470 ~ 806MHz |
• Antenna Input |
: VHF/UHF 75Ω unbalanced |
|
|
Single axis input |
|
• CRT Size |
: [WT-46807 / WS-55807 / WS-65807 |
|
|
WS-55857 / WS-65857 / WS-55907 |
|
|
WS-65907] 7 inches [WS-73907] 9 inches |
|
• High Voltage |
: 32.0kV (at 0A) |
|
• Speaker |
: [WT-46807 / WS-55807 / WS-65807 |
|
|
WS-55857 / WS-65857] |
|
|
5" round type, full range 2 pcs. (8Ω 10W) |
|
|
: [WS-55907 / WS-65907 / WS-73907] |
|
|
5" round type, full range 2 pcs. (8Ω 10W) |
|
|
2" round type, tweeter 2 pcs. (8Ω 10W) |
|
• Weight |
: [WT-46807] 121 lbs |
|
:[WS-55807] 250 lbs
:[WS-65807] 323 lbs
:[WS-55857] 243.5 lbs
:[WS-65857] 321.5 lbs
:[WS-55907] 256 lbs
:[WS-65907] 348 lbs
:[WS-73907] 405 lbs
•Weight and dimensions shown are approximate.
•Design specifications are subject to change without notice.
• Cabinet |
: |
[Model] (H)x(W)x(D) |
Dimensions |
: |
[WT-46807] 37.4"x41.6"x28" |
:[WS-55807] 51.6"x50.6"x28.3"
:[WS-65807] 61.8"x58.7"x27.5"
:[WS-55857] 51.9"x50.7"x28.2"
:[WS-65857] 61.9"x59"x28.2"
:[WS-55907] 51.5"x49.9"x28.1"
:[WS-65907] 61.6"x58.2"x28.2"
:[WS-73907] 65.7"x64.3"x29.8"
•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
:DVD / 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
•Output Level : VIDEO OUT JACK (RCA Type)
1.0Vp-p 75Ω unbalanced
:AUDIO OUT JACK (RCA Type) -4.7dBm 4.7kΩ unbalanced
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Road, Irvine, CA 92618-1904
Copyright © 2000 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 / WS-65807 / WS-65857 / WS-65907 / WS-73907
CONTENTS |
|
INTRODUCTION ............................................................................................................................... |
5 |
PRODUCT SAFETY NOTICE ........................................................................................................... |
5 |
SAFETY PRECAUTIONS ................................................................................................................. |
6 |
DISASSEMBLY |
|
Cabinet Disassembly (Front View) |
|
WT-46807 ...................................................................................................................................... |
7 |
WS-55807 / WS-65807 .................................................................................................................. |
8 |
WS-55857 / WS-65857 .................................................................................................................. |
9 |
WS-55907 / WS-65907 / WS-73907 ............................................................................................ |
10 |
Cabinet Disassembly (Rear View) |
|
WT-46807 .................................................................................................................................... |
11 |
WS-55807 / WS-55857 / WS-55907 / WS-65807 / WS-65857 / |
|
WS-65907 / WS-73907 ................................................................................................................ |
12 |
Cabinet Separation Procedure WS-65807 / WS-65857 / WS-65907 / WS-73907 ....................... |
13 |
SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS |
|
Lenticular Screen and Fresnel Lens Removal |
|
WS-55807 / WS-65807 ....................................................................................................... |
14 |
WS-55857 / WS-55907 / WS-65857 / WS-65907 / WS-73907 / WT-46807 ...................... |
15 |
Lenticular Screen and Fresnel Lens Installation .................................................................... |
16 |
SERVICING THE DIAMONDSHIELDTM |
|
DiamondShieldTM Removal / Installation ...................................................................................... |
17 |
SERVICING PCBs |
|
PCB Locations and Chassis Removal ......................................................................................... |
18 |
Main Component Locations ......................................................................................................... |
18 |
CRT REPLACEMENT |
|
CRT Removal .............................................................................................................................. |
19 |
CRT Installation ........................................................................................................................... |
20 |
ELECTRICAL ADJUSTMENTS |
|
Test Equipment ............................................................................................................................ |
22 |
Initial Setup .................................................................................................................................. |
22 |
Self Diagnostics ........................................................................................................................... |
24 |
Circuit Adjustment Mode .............................................................................................................. |
24 |
Convergence Adjustment Mode ................................................................................................... |
26 |
E2PROM Replacement ................................................................................................................ |
28 |
Adjustment Items List .................................................................................................................. |
28 |
Adjustment Test Points ................................................................................................................ |
31 |
Adjustment Procedures ................................................................................................................ |
32 |
Audio Circuit ....................................................................................................................... |
32 |
High Voltage Regulation ..................................................................................................... |
33 |
Main/Sub Y Level ................................................................................................................ |
33 |
Side by Side Sub Picture Tint ............................................................................................. |
34 |
Side by Side Sub Picture Color .......................................................................................... |
34 |
CRT Cutoff .......................................................................................................................... |
35 |
White Balance (NTSC) ....................................................................................................... |
35 |
White Balance (HD) ............................................................................................................ |
36 |
Cb, Cr Offset ....................................................................................................................... |
36 |
Black Level ......................................................................................................................... |
37 |
Page 3
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 / WS-65807 / WS-65857 / WS-65907 / WS-73907
Sub Contrast ....................................................................................................................... |
|
37 |
Dynamic Focus Preset ........................................................................................................ |
|
38 |
Electrostatic Focus .............................................................................................................. |
|
38 |
Lens Focus .......................................................................................................................... |
|
39 |
Character Position .............................................................................................................. |
|
39 |
Deflection/Convergence Geometry Presets ........................................................................ |
40 |
|
Deflection Circuit Geometry Adjustments ........................................................................... |
41 |
|
Convergence Circuit Geometry Adjustments ...................................................................... |
42 |
|
Centering and Static Convergence |
..................................................................................... |
43 |
Coarse Convergence Adjustments |
..................................................................................... |
44 |
Fine Convergence Adjustments .......................................................................................... |
|
45 |
CHIP PARTS REPLACEMENT ....................................................................................................... |
|
46 |
REPLACEMENT PARTS |
|
|
Parts Ordering .............................................................................................................................. |
|
47 |
Critical and Warranty Parts Designation ...................................................................................... |
|
47 |
Parts Tolerance Codes ................................................................................................................. |
|
47 |
Quick Reference List ................................................................................................................... |
|
48 |
Service Parts List ......................................................................................................................... |
|
49 |
CIRCUITRY BLOCK DIAGRAMS |
|
|
Standby Supply Regulator ........................................................................................................... |
|
66 |
Switched Supply Regulator .......................................................................................................... |
|
67 |
Video / Color A/V Switch Circuit .................................................................................................. |
|
68 |
Video / Color Signal Path ............................................................................................................. |
|
69 |
Sync Signal Path ......................................................................................................................... |
|
70 |
Deflection / HV ............................................................................................................................. |
|
71 |
X-Ray Protect ............................................................................................................................... |
|
71 |
Sound Circuit ............................................................................................................................... |
|
72 |
Convergence ................................................................................................................................ |
|
73 |
Control Circuit .............................................................................................................................. |
|
74 |
Section 2 .... |
Schematic Diagrams |
|
SCHEMATIC DIAGRAMS |
|
|
Overall Block Diagram ................................................................................................................... |
|
1 |
PCB-POWER ................................................................................................................................. |
|
2 |
PCB-MAIN ..................................................................................................................................... |
|
3 |
PCB-SIGNAL (AV/I-O .................................................................................................................... |
|
4 |
PCB-SIGNAL (MICRO) .................................................................................................................. |
|
5 |
PCB-SIGNAL (VC/SW) .................................................................................................................. |
|
6 |
PCB-2HDW (IN) ............................................................................................................................. |
|
7 |
PCB-2HDW (MAIN) ....................................................................................................................... |
|
8 |
PCB-2HDW (OUT) ......................................................................................................................... |
|
9 |
PCB-TERMINAL .......................................................................................................................... |
|
10 |
PCB-CONVERGENCE GENERATOR/JUNGLE .......................................................................... |
11 |
|
PCB-3DYC/MAIN DECODER ...................................................................................................... |
|
12 |
PCBs - CRT/CONTROL/PREAMP/DBF/FRONT/DISPLAY ......................................................... |
13 |
|
PCB-BMP (1) ............................................................................................................................... |
|
14 |
PCB-BMP (2) ............................................................................................................................... |
|
15 |
PCB LAYOUT DIAGRAMS ............................................................................................................. |
|
16 |
Page 4
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
INTRODUCTION
This service manual provides service instructions for PTV Models WT-46807, WS-55807 and WS-65807 which use the V17 chassis, PTV Models WS-559857, and WS-65857 which use the V17+ chassis, and PTV Models WS-55907, WS-65907 and WS-73907 which use the V17++ chassis. Service personnel should read this manual thoroughly before servicing these chassis.
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 
in the schematics 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: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
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: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
CABINET DISASSEMBLY (FRONT VIEW)
WT-46807
*Refer to the Parts List for Part Numbers
1a. Front Cabinet Disassembly
1.Remove the Speaker Grille by pulling forward.
2.Remove 2 screws (b) to remove the Control Panel.
3.Remove the Board Front by removing 4 screws (a).
4.Remove the 4 screws (c) holding the Screen Assembly.
5.Lift the Screen Assembly up and away from the cabinet.
Page 7
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
CABINET DISASSEMBLY (FRONT VIEW)
WS-55807 / WS-65807
*Refer to the Parts List for Part Numbers
1b. Front Cabinet Disassembly
1.Remove the Speaker Grille by pulling forward.
2.Remove the Board Front by removing 4 screws (a).
3.Remove the 5 screws (b) holding the Screen Assembly.
4.Lift the Screen Assembly up and away from the cabinet.
Page 8
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
CABINET DISASSEMBLY (FRONT VIEW)
WS-55857 / WS-65857
*Refer to the Parts List for Part Numbers
1c. Front Cabinet Disassembly
1.Remove the Speaker Grille 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 9
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
CABINET DISASSEMBLY (FRONT VIEW)
WS-55907 / WS-65907 / WS-73907
*Refer to the Parts List for Part Numbers
1d. Front Cabinet Disassembly
1.Remove the Cover Front, the two Speaker Grilles and Cover Control 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 10
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
CABINET DISASSEMBLY (REAR VIEW)
WT-46807
*Refer to the Parts List for Part Numbers
2a. Rear Cabinet Disassembly
1.Remove 15 screws (a) holding the Back Board.
2.Remove the 13 screws (b) holding the Back Cover.
3.Remove the 3 screws (d) securing each Board Shelf.
3.Remove the 4 screws (c) securing the Light Box Assembly.
4.Slide the Light Box out the rear of the Cabinet.
Page 11
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
CABINET DISASSEMBLY (REAR VIEW)
WS-55807 / WS-55857 / WS-55907 / WS-65807 / WS-65857 / WS-65907 / WS-73907
*Refer to the Parts List for Part Numbers
2b. Rear Cabinet Disassembly
1.Remove 12 screws (a) holding the Back Board.
2.Remove the 4 screws (c) holding each Board Shelf.
3.Remove the 4 screws (b) securing the Light Box Assembly.
4.Slide the Light Box out the rear of the Cabinet.
Page 12
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
CABINET SEPARATION PROCEDURE
MODELS: WS-65807, WS-65857, WS-65907, WS-73907
The cabinets for the above models are assembled in two pieces. The two pieces may be separated to allow easier delivery and setup. The following instructions show how to safely separate and re-attach the cabinets.
Note: The guide pins under the cabinet top are prone to breakage if mishandled. Be sure to keep the cabinet top straight when removing, setting down and re-installing, being careful not to tilt backward or forward on the guide pins.
1)Remove the lower screw from each side of the TV back. On both sides, pull off the two plastic caps, and remove the two exposed screws.
2)Lift the cabinet top straight up until the guide pins clear the holes in the bottom cabinet. DO NOT use the screen frame when lifting the cabinet top.
3)Carefully place the cabinet top onto the floor.
4)When reassembling, set the cabinet top on the bottom. Be sure the guide pins align with the holes in the cabinet bottom. Keep your fingers clear of the edges being joined. Replace the caps and screws that were removed in step 1.
Step 1 |
Step 2 |
Step 3 |
Step 4 |
Page 13
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
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-55807 / WS-65807
1a. Lenticular Screen and Fresnel Lens Removal
1.Remove the screen assembly as shown in the Cabinet Disassembly procedure.
2.Remove the screws (a) securing the Screen Holder.
3.Slide the Lenticular Screen and Fesnel 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 14
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
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-55857 / WS-65857 / WS-55907 / WS-65907 / WS-73907 / WT-46807 1a. Lenticular Screen and Fresnel Lens Removal
1.Remove the screen assembly as 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.
Page 15
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
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 |
Screen |
Tape |
|
Size |
Length |
||
|
|||
W T-46807 |
46" |
40" |
|
W S-55807 |
55" |
47.8" |
|
W S-55857 |
55" |
47.8" |
|
W S-65807 |
65" |
56.5" |
|
W S-65857 |
65" |
56.5" |
|
W S-65907 |
65" |
56.5" |
|
W S-73907 |
73" |
63.5" |
Page 16
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
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 |
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.
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 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.
2. DiamondShield™ Installation Procedure
*(See the Parts List for DiamondShield™ part numbers)
To install the DiamondShieldTM, reverse the above Removal Procedure.
Page 17
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
PCB Locations and Chassis Removal
Chassis Removal
1)Remove the 3 screws “a” securing the rear of the chassis.
2) Pull up slightly of the 2 front chassis locks “b”.
3)Disconnect all interconnecting cables.
4)Carefully slide the
chassis out the rear of the cabinet.
Main Component Locations
Page 18
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
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 19
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
2. Installation of the CRT
Note: The replacement CRT is supplied as an assembly comprised of the CRT and the Inner Lens with the space between them filled with ethylene glycol. Care should be taken during handling and installation to prevent shock from disrupting the seal or alignment between the CRT and Inner Lens. [Figure 5-3]
Figure 5-3
Note: The CRT fixing screws should not be loosened nor should they be removed. [Figure 5-4]
Figure 5-4
1. Carefully position the replacement CRT and fasten in place using 4 screws "d". [Figure 5-6]
Figure 5-6
Figure 5-5
Page 20
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
2.Install the Deflection Yoke on the CRT neck. [Figure 5-7]
3.Install the Lens that was removed in steps 8 and 9 of Removal Of The CRT. [ Figures 5-1 and 5-2 ]
a)Position the Lens so that the Label faces the direction shown in Figure 5-8.
b)Install the mounting screws. [Figure 5-1]
4.Connect the PCB-CRT.
5.Insert the Optical Unit into the Light Box Assembly.
6.Insert the Anode Lead Wire into the Flyback Transformer.
7.Re-clamp the Lead Wire in its original position.
Figure 5-7
Figure 5-8
Adjustment procedures after replacing the CRT(s)
•CRT Cut Off / White Balance Adjustment
•Static Convergence Adjustment
•Dynamic Convergence Adjustment
Page 21
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
ELECTRICAL ADJUSTMENTS
Note: Perform only the adjustments required.
Do not attempt an alignment if proper equipment is not available.
1.Test Equipment
•Oscilloscope (Unless otherwise specified, use 10:1 probes)
•Signal Generator (both SD and HD capable)
•Frequency Counter
•Direct Current Voltmeter
•Direct Current Power Supply
•Multiplex Audio Signal Generator
• Direct Current Ampere Meter
2. Test Signals
A. Monoscope Signal
When called for, use the NTSC or HD 1080i monoscope signal shown.
B. Color Bar Signal
Use the color bar signal shown below, unless otherwise specified in this manual.
Monoscope Signal
100%
75%
40%
40%
1H
Split-Field Color Bars (100% window)
3. Initial Setup
A. Option Menu Setup
Follow the steps below for the initial set-up:
1.Select the "MENU" display by pressing the "MENU" button once.
2.Press the number buttons "8", "2", "7", "0" in sequence to select the "OPTION MENU" display.
3.Press the "ADJUST" button to select "INITIAL."
4.Press "ENTER."
NOTE: At this time channel 3 is automatically selected.
(MENU-8-2-7-0)
OPTION MENU |
|
|
Initial |
|
|
Power restore |
:OFF |
|
DTV Port |
:Auto |
|
Page 22
MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907
B. Default Settings
MAIN MENU DEFAULT SETTINGS
SETUP |
|
|
|
|
|
CHANNEL EDIT |
|
ADVANCED FEATURES |
||||||
Memorize Channels |
|
ANT A |
|
Input |
|
|
ANT A |
|
SD Video Format |
480P |
||||
Language |
|
English |
|
Channel |
|
3 |
|
Video Mute |
On |
|||||
CLOCK |
|
|
|
Memory |
|
|
Deleted |
|
Black Level Expansion |
On |
||||
Clock Setting |
|
Auto |
|
Name |
|
|
N/A |
|
AUDIO SETTINGS |
|||||
Time Zone |
|
Eastern |
|
SQV |
|
|
|
|
N/A |
|
Volume |
30% |
||
Daylight Savings |
|
Applies |
|
|
|
TIMER |
|
|
|
Bass |
50% |
|||
Clock Time |
|
N/A |
|
Timer |
|
|
Off |
|
Treble |
50% |
||||
Set Day |
|
N/A |
|
Set Time |
|
12:00PM |
|
Balance |
50% |
|||||
AV CONNECTION |
|
Set Day |
|
Everyday |
|
Surround |
Off |
|||||||
AV Network |
|
OFF |
|
Input |
|
|
ANT A |
|
Listen to |
Stereo |
||||
External Audio System |
|
NO |
|
Channel |
|
3 |
|
|
|
|
||||
AV Receiver at Input 1 |
|
None |
|
|
|
V-CHIP PARENT LOCK |
|
Level Sound |
Off |
|||||
Audio Output |
|
Variable |
|
TV Rating |
|
|
Off |
|
VIDEO SETTINGS |
|||||
INPUT ASSIGNMENT |
|
FV-Fantasy Violence |
|
N/A |
|
Iris |
Off |
|||||||
Antenna A |
|
On |
|
D-Sexual Dialog |
|
|
N/A |
|
Contrast |
100% |
||||
Antenna B |
|
On |
|
L-Adult Language |
|
N/A |
|
Brightness |
50% |
|||||
DTV |
|
YPrPb |
|
S-Sexual Situation |
|
N/A |
|
Sharpness |
50% |
|||||
Input 1 |
|
Input-1 |
|
V-Violence |
|
|
N/A |
|
Color |
50% |
||||
Input 2 |
|
Input-2 |
|
Program not Rated |
|
N/A |
|
Tint |
50% |
|||||
Input 3 |
|
Input-3 |
|
Movie Rating |
|
|
N/A |
|
Color Temp. |
High |
||||
Input 4 |
|
Input-4 |
|
|
|
V-CHIP LOCK BY TIME |
|
Video Noise |
Reduction |
|||||
Component 1 |
|
Comp. 1 |
|
V-Chip Start Time |
|
N/A |
|
PIP/POP |
|
|||||
component 2 |
|
Comp. 2 |
|
V-Chip Stop Time |
|
N/A |
|
Source |
Ant A Ch 3 |
|||||
CAPTIONS |
|
|
|
Lock by Time |
|
|
Off |
|
PIP Position |
Lower Right |
||||
Closed Captions |
With Mute |
|
Lock Time |
|
|
N/A |
|
POP Position |
Right Half |
|||||
CC Background |
|
Gray |
|
Unlock Time |
|
|
N/A |
|
Format |
Standard |
||||
|
|
|
|
|
|
|
|
|
|
|
|
PIP/POP Format |
Dble. Window |
|
|
|
A/V RESET DEFAULT SETTINGS (By Input) |
|
|||||||||||
|
|
A/V Memory |
|
ANT-A/B |
|
DTV |
|
INPUTS 1-4 |
DVD-1/2 |
|
|
|||
|
|
Iris |
|
|
|
|
|
|
OFF |
|
|
|
||
|
|
Contrast |
|
|
Max. |
|
Max. |
|
Max. |
Max. |
|
|
||
|
|
Brightness |
|
|
Center |
|
Center |
|
Center |
Center |
|
|
||
|
|
Auto Picture |
|
|
|
|
|
OFF |
|
|
|
|||
|
|
Sharpness |
|
|
Center |
|
Center |
|
Center |
Center |
|
|
||
|
|
Color |
|
|
Center |
|
Center |
|
Center |
Center |
|
|
||
|
|
Tint |
|
|
Center |
|
Center |
|
Center |
Center |
|
|
||
|
|
Color Temp. |
|
High |
|
High |
|
High |
High |
|
|
|||
|
|
Video Noise |
|
Normal |
|
Normal |
|
Normal |
Normal |
|
|
|||
|
|
Bass |
|
|
Center |
|
Center |
|
Center |
Center |
|
|
||
|
|
Treble |
|
|
Center |
|
Center |
|
Center |
Center |
|
|
||
|
|
Balance |
|
|
|
|
Center |
|
|
|
||||
|
|
Surround |
|
|
OFF |
|
OFF |
|
OFF |
OFF |
|
|
||
|
|
Listen To |
|
|
|
|
Stereo |
|
|
|
||||
|
|
Level Sound |
|
OFF |
|
OFF |
|
OFF |
OFF |
|
|
|||
C.A/V Memory
Each of the external inputs has its’ own Audio/Video Memory. A change in an A/V setting at a specific input is stored in memory for that specific input.
A/V Reset
1.The front panel AV Reset button intializes all A/V Memories.
2.The AV Reset in the user’s menu initializes only the selected input’s A/V Memory.
Page 23
Loading...