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: 200W
• Light Engine: DLP (1280 x 720p pixels)
• Light Source: 120W VIP
• Frequency Range: VHF 54 ~ 470MHz
UHF 470 ~ 806MHz
• Antenna Input: VHF/UHF 75Ω unbalanced
2 - NTSC
• Cabinet DimensionsWD-52327
: 37.2"(H) x 49.6"(w) x 17.4"(D)
WD-62327
: 43.7"(H) x 58.3"(W) x 19.9"(D)
• Weight[WD-52327] 110 lbs
[WD-62327] 139 lbs
• Speakers (8 Ohms 10W)
: 2-5 inch Coaxial
• Input Level: VIDEO IN JACK (RCA Type)
• Output Level: VIDEO OUT JACK (RCA Type)
WD-52327
WD-62327
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
This service manual provides service instructions for PTV models WD-52327 and WD-62327, using the VK26 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 to PWB level. The Optical Engine and Lamp Ballast are considered replaceable components
4. Electrical and Mechanical adjustments.
5. Chip parts replacement procedures.
6. Simplified signal path block 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.
Page 5
MODEL: WD-52327 / WD-62327
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 INJURY
Do not look into the light source, Light Engine 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 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
MODEL: WD-52327 / WD-62327
CABINET DISASSEMBLY (FRONT VIEW)
WD-52327 / WD-62327
*Refer to the Parts List for Part Numbers
Front Cabinet Disassembly
1. Remove the SPEAKER-GRILLE by pulling forward.
2. Remove screws (a) to remove the COVER-FRONT.
3. Remove screws (b) on the rear of the upper back cover (4 across the top and 3 on each side).
4. Remove the 4 screws (c) holding the bottom of the Screen Assembly.
5. Unplug connector LN from the Control Panel.
6. Lift the Screen Assembly up slightly then pull towards the front to remove the assembly.
Page 7
MODEL: WD-52327 / WD-62327
REAR DISASSEMBLY
FILTER-COVER Removal
Remove 2 screws (d) to remove the Filter Cover.
COVER-BACK Removal
1) Remove 9 screws (a)
2) Remove 6 screws (b)
3) Remove 2 screws (c)
4) Pull the COVER-BACK
from the cabinet.
NOTE: To operate the TV with the COVER-BACK removed,
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 rear edge of the Lenticular Screen, as shown
below. Refer to the table below for the tape length.
2. Sandwich the Fresnal Lens and Lenticular Screen together. The Lenticular Screen label must be towards
the front and the Fresnel Lens label towards the rear. (Figure 4)
3. Apply pressure at the top edge to bond the screens together.
4. Reverse the Screen Removal procedure and insert the screens in the Screen Fame Assembly.
Figure 4: Installing the Fresnel Lens & Lenticular Screen
*X INCHES - Refer to the Tape Length in the table below
Do not attempt an alignment if proper equipment is not available.
Test Equipment
• Oscilloscope (Unless otherwise specified, use 10:1 probes)
• Signal Generator (NTSC Color Bar)
Test Signals
A. Internally Generated Square Pattern Signals
B. Color Bar Signal
Use the color bar signal shown
below, unless otherwise specified
in this manual.
100%
40%
75%
40%
1H
Split-Field Color Bars (100% window)
Page 20
MODEL: WD-52327 / WD-62327
V
f
f
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 "5", "7", "7", "0" in sequence to select the "OPTION MENU" display.
3. Press the "ADJUST" button to select "INITIALIZE."
4. Press "ENTER."
NOTE: At this time channel 3 is automatically selected.
OPTION MENU <MENU> <5-7-7-0>
Initialize
Power Restore: Of
DTV Port: AUTO
Direct Key Mode: Of
Lamp Hours:TOTALCURRNT PREV1PREV2
0000
Total TV
On Time
Current
Lamp
Time
Previous
Lamp
Time
Previous
Lamp
Time 2
B.Default Settings
K26 M ain M enu Defau lt Settings
Setup Menu
Memorize ChannelsAnt-A Front Button LockOff Yellow50%
LanguageEnglish Green50%
Energy ModeStandard V-ChipOff Cyan50%
Input Assignm e nt Me n u
Antenna-AOn FV-Fant asy ViolenceA llow
Antenna-BOn D-Sex ual DialogAllow A/V Memory ResetA nt-A
DTVYPrP b L-Adult LanguageAllow TV Speak ers (internal)On
Component-1Comp-1 S-Sex ual SituationAllow A udio OutputFixed
Component-2Comp-2 V-ViolenceAllow
Input-1Input-1 M ovie RatingPGBass50%
Input-2 Input-2 Programs Not RatedAllow Treble50%
Input-3Input-3 Balanc eCenter
MonitorLink™MonoLinkV-Chip Start Time12:00am S urrondOff
Clock Me nu
Clock S ettingManual Level SoundOff
Clock Time../..Color BalanceTV Volume30%
Set DaySunday Timer
Time ZoneN/A Video M uteOn Contrast50%
Daylight SavingsN/A Blac k Enhanc em enttOn Brightness50%
Captions
Closed CaptionsIn Mute Ant-A A uto Color CorrectionOff Color50%
CC Back groundGray PerfectColor™Tint50%
Channel Edit Menu
AntennaAnt -A
Channel003 TimerOff Film Mode (Auto)On
MemoryDeleted Set Time12:00 AM
NameN/A Set DayEveryday PIP SouceAnt-A Ch-3
SQVN/A InputAnt-A PIP PositionLower Rt.
V-Chip Lock Menu
Lock by TimeOn PIP/POP FormatDble Win.
Lock TimeN/A M agenta50%
Unlock TimeN/A Red50%
V-Chip Menu
TV RatingTV-PG Blue50%
Audio/Video Settings Menu
Audio S e tti ngs (TV )
V-Chip Hours
V-Chip Start Time12:00am Listen ToStereo
Advanced Features Menu
Video Settin gs (TV)
Color Balance Me nu
Reset Color for Ant-AColor Temp.High
Timer Menu
Channel003 P OP PositionRt. Half
PerfectColor™
Sharpness50%
Video NoiseStandard
PIP Menu
Format
Stretch
Page 21
MODEL: WD-52327 / WD-62327
A/V Memory Defaults
FunctionAnt -A/BDTVComp-1/2Input 1/2/3 MonoLink
ContrastMaximum MaximumMaximumMaximumMaximum
BrightnessCenterCenterCenterCenterCenter
SharpnessCenterCenterCenterCenterCenter
ColorCenterCenterCenterCenterCenter
TintCenterCenterCenterCenterCenter
Color Temp.HighHighHighHighHigh
Video NoiseStandard StandardStandardStandardStandard
Film ModeOnOnOnOnOn
BassCenterCenterCenterCenterCenter
TrebleCenterCenterCenterCenterCenter
BalanceCenterCenterCenterCenterCenter
SurroundOffOffOffOffOff
Listen ToStereoN/AN/AN/AN/A
Level SoundOffOffOffOffOff
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 initializes all A/V Memories.
2. The AV Reset in the user’s menu initializes only the selected input’s A/V Memory.
LED Indications
The three front panel LEDs provides an indication of the sets operation,
and the possible cause of a malfunction.
Normal LED Indications
LED
Power/TimerStatusLampCondition
OffOffOffOff (standby)
Green BlinkOffOffµPC Initializing (after AC off/on) (1~2 sec)
OffOffBlink greenLamp Fan running (1 min after PTV Off)
GreenOffOffPower On
Slow Green BlinkOffOffPower On Timer is set.
Abnormal LED Indications
LED
Power/TimerStatusLampCondition
OffYellowOffTemp. high - dirty filter/excess room temp.
OffOffYellow4000 hrs. Lamp usage warning
OffOffBlink YellowLamp Cover open
OffBlink YellowOffAir Filter Cover open
OffOffRedLamp failure (failed to turn On or broken)
OffBlink RedOffFan Stopped
RedOffCircuit failure (short) or DVI cable disconnected
Page 22
LED Diagnostic Check
1. Initial Control Circuitry Check
Immediately after the TV is connected to an AC power source:
2. Error Code Operational Check
Pressing the front panel “INPUT” and “MENU” buttons at the same time, and holding for 5 seconds,
activates the Error Code Mode. The ” Power LED” flashes denoting a two digit Error Code, or indicating no problem
has occured since the last Initalization.
Note: The front panel buttons must used, NOT those on the Remote Control.
• The number of flashes indicates the value of the MSD (tens digit) of the Error Code.
• The flashing then pauses for approximately 1/2 second.
• The LED then flashes indicating the value of the LSD (ones digit) of the Error Code.
• The Error Code is repeated a total of 5 times.
Example: If the Error Code is “34”, the LED will flash 3 times, pause, and then flash 4 times.
3. Error Codes
The Error Code designations indicating a malfunction, or no malfunction, are listed below:
ERR0R CODES
Error
Code
12No Error detected, check Power Supply
32Lamp Cover is open
33Air Filter Cover is open
34Lamp abnormality
36Light Engine (DMD or LAMP Fan stopped)
37Exhaust or Lamp Ballast Fan stopped
38Lamp temperature high
39DMD temperature high
41Short is detected
44DVI cable between FMT & Engine disconnected.
MODEL: WD-52327 / WD-62327
Description
Circuit Adjustment Mode
Most of the adjustments can only be performed using the remote hand unit.
A. Activating the Circuit Adjustment Mode
1. Select the signal source.
2. Press the "MENU" button on a remote hand unit.
3. Press the number buttons "5", "7", "5", "7" in sequence. The screen will change to the Adjustment Mode.
Note: Repeat steps 1 and 2 if the circuit
adjustment mode does not appear
on screen.
Page 23
MODEL: WD-52327 / WD-62327
A
B. Selection of adjustment Functions and
Adjustment Items
To select an adjustment item in the circuit adjustment mode, first select the
adjustment function that includes the specific item to be adjusted. Then
select that adjustment item.
Refer to the following pages for the listing of
adjustment functions and adjustment items.
1. Press the "AUDIO" button on a remote hand unit to select an adjustment function. Each time the button is pressed, the Function changes
in the following sequence:
MAIN MATRSUB MATR
Adjustment Functions
DDPFPG
2. Press the “VIDEO” button to select a specific
Adjustment Item. The Item number increases
each time the“VIDEO” button is pressed.
MISCDEV
C. Changing Data
After selecting an adjustment Item, use the “ADJUST UP/DOWN” buttons to
change data.
•Press “ADJUST DOWN” to decrease the data value.
•Press “ADJUST UP” to increase the data value.
D. Saving Adjustment Data
Press “ENTER” to save adjustment data in memory. The character display turns red for approximately one
second in this step.
Note: If the circuit adjustment mode is terminated without pressing “ENTER”, changes in adjustment data
are not saved.
E. Terminating the Circuit Adjustment Mode
Press the “MENU” button on the remote hand unit twice to terminate the adjustment mode.
Note: The circuit adjustment mode can also be terminated by turning power OFF.
120GGHHigh Temp. Green Gain000~4002FA31F
121GRHHigh Temp. Red Gain"400400
122GBHHigh Temp. Blue Gain"36D34F
123GGMMid Temp. Green Gain"2E12FE
124GRMMid Temp. Red Gain"400400
125GBMMid Temp. Blue Gain"3202FF
126GGLLow Temp. Green Gain"2C82EC
127GRLLow Temp. Red Gain"400400
128GBLLow Temp. Blue Gain"2D42C0
NOTE: Data values are in hexadecimal format
Stored in IC2K02 on PWB-TERMINAL
Data
Initial Data
Page 25
MODEL: WD-52327 / WD-62327
Activating & Selecting an Internal
Test Signal
1. Select an External Input with no signal.
2. Press the buttons “MENU”-“5”-“7”-“5”-“7” in
sequence. (Activates the Service Menu)
3. Select the “FPGA” function (AUDIO button)
4. Press “1” for Pattern A, or “2” for Pattern B.
.
5. Press “9” to return to the Service Menu.
6. Press “MENU” to exit the Service Mode.
CAUTION
DO NOT press “MENU” (or HOME) without
pressing “9” first. (The Video Mute function will
not function properly.)
To correct the Mute function -- remove AC to
the TV, then reapply AC to reset the unit.
Page 26
[Video Circuit]
A
MODEL: WD-52327 / WD-62327
Purpose:
To set picture luminance
1. Main/Sub Y Level
Measuring
Instrument
Test Point
Ext. Trigger
Measuring
Range
Input Signal
Input Terminal
CIRCUIT ADJ UST MODE
ctivate …….. MENU-5-7-5-7
Func tion … ...………..AU D IO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Sa ve D a ta …. …… … E NTER
Exit …………..MENU (twice)
Oscilloscope
JA-22 & JB-3
------
------
Color Bars
Video Input
Symptom:
Excess or insufficient brightness.
1. Supply a color bar signal to a Video Input (not an RF input).
2. Select the color bar signal for both the main and sub pictures.
3. Connect the oscilloscope to connector JA pin 22. (Main-Y)
4. Activate the Adjustment Mode (MENU-5-7-5-7)
5. Select the “MAIN MTRX” function. (AUDIO button)
10. Adjust data so the Sub Cr amplitude equals that of the Main Cr.
11. Press “ENTER to save data changes.
Page 27
[Video Circuit]
A
3. White Balance
Measuring
Instrument
Test Point
Ext. Trigger
Measuring
Range
Input Signal
Input Terminal
CIRCUIT ADJ UST MODE
ctivate …….. MENU-5-7-5-7
Func tion … ...………..AU D IO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Sa ve D a ta …. …… … E NTER
Exit …………..MENU (twice)
------
------
White Raster
Video Input
MODEL: WD-52327 / WD-62327
Purpose:
Symptom:
1. Supply a 100% white raster to an External Video Input.
3. Activate the Service Mode. (MENU-5-7-5-7)
4. Select the “DDP” function. (AUDIO button)
5. Select adjustment Items with the VIDEO button.
NOTE: Data is displayed in the hexadecimal format.
6. Adjust the data for Items “120 GGH”, “121 GRH and “122 GBH” for optimum
white at the center of the screen.
7. Adjust the data for Items “123 GGM”, “124 GRM and “125 GBM” for optimum
white at the center of the screen.
8. Adjust the data for Items “126 GGL”, “127 GRL and “128 GBL” for optimum
white at the center of the screen.
9. Press “ENTER” to save data changes.
10. Press “MENU” twice to exit the Service Mode.
To set high, mid and low temperature white levels.
White areas have a color tint.
[PICTURE POSITION]
4. Horizontal/Vertical Position
Measuring
Instrument
Test Point
Ext. Trigger
Measuring
Range
Input Signal
Input Terminal
----
----
------
-------
Internal Pattern “B”
External Input
Purpose:
Symptom:
To center picture on the screen.
Picture is off center.
NOTE: The TV must be on a flat level surface.
1. Select an External Input with no signal.
2. Press “MENU-5-7-5-7” in sequence (activates the Service Mode).
3. Press “AUDIO” to select the “FPGA” function.
4. Press “2” to activate internal Test Pattern B. (Shown below)
5. Use the “VIDEO” button to select Item “1 H-DLY”.
6. Use the “ADJUST” buttons to center the picture Horizontally..
7. Press “ENTER” to save the adjustment.
8. Use the “VIDEO” button to select Item “2 V-DLY”.
9. Use the “ADJUST” buttons to center the picture Vertically.
10. Press “ENTER” to save the adjustment.
11. Press “9” to terminate the test pattern.
12. Press “Menu” twice to terminate the Adjustment Mode.
CIRCUIT ADJUST MODE
Activate …….. MENU-5-7-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit ………….."9" then "MENU"
Page 28
MODEL: WD-52327 / WD-62327
Mechanical Adjustments
•To perform the mechanical adjustments, the TV must be on a flat level surface and a certain amount of disassembly
is required.
•Use internal Test Pattern B for all mechanical adjustments.
Front Disassembly
Refer to the diagram below for the Front Panel removal procedures.
Rear Disassembly
Refer to the to the diagrams below for the COVER-BACK and Rear Plate removal.
NOTE: T o operate the T V with the COVER-BACK removed,
the FIL TER-COVER must be reinstalled and the Exhaust Fan connected.
Page 29
MODEL: WD-52327 / WD-62327
Picture Rotation Adjustment
NOTE: The TV must be on a flat level surface.
1. From the front of the TV, lift the foam to access and loosen slightly, the brass Rotation Locking Screws on the Adjuster
Assembly, Figure 4A. (Use a 10mm wrench.)
2. From the rear of the TV, access the black Rotation Adjustment screw and adjust so the test pattern center lines are
parallel to the sides, top and bottom of the screen frame, Figure 4B. (Use a mirror to veiw the picture from the rear of the
set.)
3. Tighten the two Locking Screws. Use Locktite to secure the Adjustment Screw. (If necessary, use the electrical adjustments to center the picture)
Page 30
MODEL: WD-52327 / WD-62327
Keystone Adjustment
Horizontal Keystone Distortion
Vertical Keystone Distortion
NOTE: The TV must be on a flat level surface
1. From the front of the TV, loosen the two Keystone Locking Screws in the small mirror assembly. (10mm wrench)
2. From the front of the TV, adjust the Horizontal Keystone Adjustment for minimum distortion.
3. From the front of the TV, adjust the Vertical Keystone Adjustment for minimum distortion.
4. Tighten the Keystone Lock Screws. and secure the adjustment screws with Locktite. (If necessary, use the electrical
adjustments to center the picture)
Horiz
Keystone
Adjust
Locking Screws
Vertical
Keystone
Adjust
Small Mirror Assembly (Front View)
Page 31
MODEL: WD-52327 / WD-62327
QUICK REFERENCE FOR COMMON REPLACEMENT PARTS
• Critical Electrical Components are indicated by Bold Type in the Parts List
Customer Replaceable Parts
Part Nam eDescriptionWD-52327W D-62327
Lam p CartridgeLAMP-CARTRIDGE915P020010915P020010
Lam p Balla stUNIT-POW ER-LAMP939B978010939B978010
Power PWBASSY-PWB-POWER930B929001930B929001
Signal PW BASSY-PWB-SIGNAL930B930001930B930001
Format PWBASSY-PWB-FMT930B931001930B931001
Terminal PWBASSY-PWB-TERMINAL930B932001930B932001
Sub Power PWBASSY-PWB-POWER-SUB934C148001934C148001
Audio PWBASSY-PWB-AUDIO934C149001934C149001
Remote PreampASSY-PWB-PREAMP935D811001935D811001
Front PWBASSY-PWB-FRONT935D812001935D812001
Control PWBASSY-PWB-CONTROL935D813001935D813001
Right Speaker PWBASSY-PWB-SPEAKER-R935D814001935D814001
Left Speaker PWBASSY-PWB-SPEADER-L935D815001935D815001
Lam p FanFAN-LAMP299P282010299P282010
DMD FanFAN-DMD299P283010299P283010
Balla st FanFAN-BALLAST299P278020299P278020
Exhaust Fa nFAN-EXHAUST299P103050299P103050