Sony KDP-51WS655, KDP-57WS655 User manual

COLOR REAR VIDEO PROJECTION
SERVICE MANUAL AX-1X CHASSIS
MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.
9-965-970-03
KDP-51WS655 RM-Y915 US/HAWAII SCC-M39A-A
KDP-57WS655 RM-Y915 US/HAWAII SCC-M39B-A
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 8/2004
:UPDATED ITEM
REVISION DATE SUBJECT
8/2004 No revisions or updates are applicable at this time.
10/2004 Corrected Note from section 2-12-1. Setup For Adjustment. Note is intended for use by the factory
during production, and should not be performed by service technicians.
(Replaced Page 41 with Page 41)
3/2005 Added Caution statement (Replaced Page 6 with Page 6)
Corrected service mode list (Replaced Page 25 with Page 25)
Added BH Board (PN A-1071-980-A) PWB (Replaced Page 82 with Page 82)
Added alternate BH Board PN to Exploded View section (Replaced Page 91 with Page 91)
New CRTs & Shades introduced for KDP-51WS655 Affects SNs 8,500,001 and up
Updated PN for Blue Shade and Lens for KDP-57WS655
New CRT Coupler Assemblies introduced for KDP-57WS655
Affects SNs 9,702,147-9,702,444 and 9,713,504 and up (Replaced Page 92 with Page 92)
☛

COLOR REAR VIDEO PROJECTION
SERVICE MANUAL AX-1X CHASSIS
MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.
9-965-970-03
KDP-51WS655 RM-Y915 US/HAWAII SCC-M39A-A
KDP-57WS655 RM-Y915 US/HAWAII SCC-M39B-A
Self Diagnosis
Supported model
KDP-51WS655
RM-Y915

KDP-51WS655/57WS655
KDP-51WS655/57WS655
3
TABLE OF CONTENTS
SECTION TITLE PAGE SECTION TITLE PAGE
Specifications ................................................................................. 4
Warnings and Cautions .................................................................. 6
Safety Check-Out ........................................................................... 7
Self-Diagnostic Function................................................................. 8
SECTION 1: DISASSEMBLY................................................................11
1-1. Rear Board Removal.............................................................11
1-2. Chassis Assembly Removal..................................................11
1-3. Service Position ................................................................... 12
1-4. Terminal Board, P Board AND Q Box Assembly Removal ... 12
1-5. BH Board Removal .............................................................. 13
1-6. A Board, D Board, and G Board Removal............................ 13
1-7. High-Voltage Cable Installation and Removal...................... 14
1-8. Picture Tube Removal.......................................................... 14
1-9. Speaker Grille, HA2 Board, and HB3 Board Removal ........ 15
1-10.Beznet Assembly Removal .................................................. 16
1-10-1. Screen Tape Method................................................ 16
1-11. SR Board Removal .............................................................. 17
Wire Dressing....................................................................... 18
SECTION 2: SET-UP ADJUSTMENTS................................................ 22
2-1. Screen Voltage Adjustment (G2) (Coarse Adjustment) ........ 22
2-2. Screen (G2) Adjustment (Fine Adjustment).......................... 22
2-3. Deflection Yoke Tilt Adjustment ............................................ 22
2-4. Focus Lens Adjustment........................................................ 23
2-5. Focus VR Adjustment........................................................... 23
2-6. Centering Magnet Adjustment.............................................. 24
2-7. 2-Pole Magnet Adjustment .................................................. 24
2-8. 4-Pole Magnet Adjustment ................................................... 24
2-9. Defocus Adjustment (Blue)................................................... 24
2-10.Electrical Adjustments by Remote Commander................... 25
2-10-1. Method of Entering the Service Adjustment Mode .. 25
2-10-2. Memory Write Confirmation Method ........................ 25
2-10-3. Adjusting Buttons and Indicator ............................... 25
2-11. Adjustable Service Data Lists .............................................. 26
2-11-1. ID Map Table............................................................ 40
2-12.Registration Adjustment (PJE Mode Only)........................... 41
2-12-1. Setup for Adjustment ............................................... 41
2-12-2. Main Deflection Adjustment ..................................... 41
2-12-3. Operation Method for Projector Engine Mode ......... 42
2-13.PJE Adjustment (Sub Deflection Adjustment) ...................... 43
2-13-1. Adjustment for NTSC Full Mode .............................. 44
2-13-2. Copying All Registration Data to Other Modes ........ 46
2-14.Auto Registration Offsets ..................................................... 46
2-15.Auto Registration Error Codes ............................................. 47
2-16.Auto Registration Diagnostics .............................................. 48
SECTION 3: SAFETY-RELATED ADJUSTMENTS............................. 49
D BOARD ..................................................................................... 49
3-1. HV Regulation Circuit Check and Adjustment...................... 49
3-2. HV Hold Down Circuit Operation Check .............................. 49
G BOARD ..................................................................................... 50
3-3. +B Max Voltage Confirmation .............................................. 50
3-4. +B OVP Confirmation........................................................... 50
SECTION 4: CIRCUIT ADJUSTMENTS.............................................. 51
4-1. P & P Sub Contrast Adjustment (Video) (SCON) ................. 51
4-2. P & P Sub Contrast Adjustment (RF) (SCON) ..................... 51
4-3. P & P Sub-Hue and Sub-Color Adjustment Video
(SHUE, SCOL) ..................................................................... 51
4-4. P & P Sub-Hue and Sub-Color Adjustment (RF)
(SHUE, SCOL) .................................................................... 51
4-5. Blue Offset Adjustment......................................................... 52
SECTION 5: DIAGRAMS..................................................................... 53
5-1. Circuit Boards Location ........................................................ 53
5-2. Printed Wiring Boards and
Schematic Diagrams Information ......................................... 53
5-3. Block Diagrams .................................................................... 55
Power Block Diagram........................................................... 55
Audio Signal Path Block Diagram ........................................ 56
Video Path Block Diagram ................................................... 57
SYNC/OSD Path Block Diagram.......................................... 58
5-4. Schematics and Supporting Information ............................. 59
CR Board Schematic Diagram ............................................ 59
CB Board Schematic Diagram ............................................ 60
CG Board Schematic Diagram ............................................ 61
VM Board Schematic Diagram ............................................ 64
A Board Schematic Diagram (1 of 6).................................... 65
A Board Schematic Diagram (2 of 6).................................... 66
A Board Schematic Diagram (3 of 6).................................... 67
A Board Schematic Diagram (4 of 6).................................... 68
A Board Schematic Diagram (5 of 6).................................... 69
A Board Schematic Diagram (6 of 6).................................... 70
D Board Schematic Diagram (1 of 2) ................................... 75
D Board Schematic Diagram (2 of 2) ................................... 76
BH Board Schematic Diagram (1 of 2)................................. 80
BH Board Schematic Diagram (2 of 2)................................. 81
G Board Schematic Diagram ............................................... 83
HA2 Board Schematic Diagram .......................................... 86
P Board Schematic Diagram................................................ 87
SR Board Schematic Diagram ............................................ 88
HB3 Board Schematic Diagram ........................................... 88
SECTION 6: EXPLODED VIEWS ........................................................ 90
6-1. Cover.................................................................................... 90
6-2. Chassis ................................................................................ 91
6-3. Picture Tube ......................................................................... 92
SECTION 7: ELECTRICAL PARTS LIST........................................... 93

KDP-51WS655/57WS655
KDP-51WS655/57WS655
4
120V AC, 60Hz
260W
Under 1 W
Under 16 W
HDMI IN
Video
1080i, 720p, 480p, 480i
Audio
Two channel linear PCM 32, 44.1, and 48 kHz, 16, 20,
and 24 bit
Video (IN)
4 total (1 on front panel)
1Vp-p, 75ohms unbalanced, sync negative
S Video (IN)
3 total (1 on front panel)
Y: 1Vp-p, 75ohms unbalanced, sync negative
C: 0.286Vp-p (Burst signal), 75ohms
Digital Audio Optical Output
PCM/Dolby Digital
1 Total
Optical Rectangular
SPECIFICATIONS
Design and specifications are subject to change without notice.
Power Requirements
Power Consumption (W)
In Use (Max)
In Standby
In CableCARD Standby
Inputs/Outputs
Audio (IN)
7 total (1 on front panel)
500 mVrms (100% modulation)
Impedance:47 kilohm
Component Video Input
2 ( Y,PB,PR)
Y: 1.0 Vp-p, 75 ohms unbalanced, sync negative;
PB: 0.7 Vp-p, 75 ohms;
PR: 0.7 Vp-p, 75 ohms
Control S (IN/OUT)
1 total
Variable/Fixed Audio (OUT)
More than 408 m Vrms (Variable) at the maximum volume setting
More than 408 m Vrms (Fixed) Impedance (output):2 kilohms
CableCARD Slot
PCMCIAType I/II
KDP-51WS655
KDP-51WS655
KDP-57WS655
KDP-57WS655
20W x 2
1194 x 1280 x 666 mm 1326 x 1377 x 692 mm
47 x 50
1/2
x 26
1/4
in 52
1/4
x 54
1/4
x 27
1/4
in
79.6 kg 92.3 kg
175.5 lbs 203.5 lbs
Speaker Output (W)
Dimensions (W x H x D)
mm
in
Mass kg
lbs
CableCARD
™
is a trademark of Cable Television
Laboratories, Inc.
TruSurround, SRS and the ( )®symbol are trademarks
of SRS Labs, Inc.
TruSurround technology is incorporated under license
from SRS Labs, Inc.
BBE and BBE Symbol are trademarks of BBE Sound,
Inc. and are licensed by BBE Sound, Inc. under U.S.
Patent No. 4,638,258 and 4,482,866.
Manufactured under license from
Dolby Laboratories Licensing
Corporation. Dolby and the double-D
symbol are trademarks of Dolby
Laboratories Licensing Corporation.
This TV incorporates High-Definition
Multimedia Interface (HDMI
™
)
technology. HDMI, the HDMI logo
and High-Definition Multimedia
Interface are trademarks or registered
trademarks of HDMI Licensing LLC.
WEGA, Steady Sound, Digital Reality Creation,
CineMotion, Memory Stick, Memory Stick Duo,
Memory Stick PRO, Memory Stick PRO Duo,
MagicGate, MID and Twin View are trademarks of Sony
Corporation.

KDP-51WS655/57WS655
KDP-51WS655/57WS655
5
Projection System
3 picture tubes, 3 lenses, horizontal in-line system
Picture Tube
7-inch high-brightness monochrome tubes (6.3 raster size),
with optical coupling and liquid cooling system.
Projection Lenses
High performance, large diameter hybrid lens F1.1
Antenna
75 ohm external terminal for VHF/UHF
Television System
NTSC, American TV Standard
ATSC (8VSB terrestrial) ATSC compliant 8VSB
QAM on cable ANSI/SCTE 07 2000
Channel Coverage
Terrestrial (analog) 2-69
Cable TV (analog) 1-125
Terrestrial (digital) 2-69
Cable TV (digital) 1-135
Screen Size (measured diagonally)
51 inches (KDP-51WS655)
57 inches (KDP-57WS655)
Supplied Accessories
Remote Control RM-Y915
Batteries (2) size AA (R6)
Optional Accessories
A/V Cable (VMC-810/820/830 HG)
Audio Cable (RKC-515HG)
Component Video Cable (VMC-10/30 HG)

KDP-51WS655/57WS655
KDP-51WS655/57WS655
6
WARNINGS AND CAUTIONS
CAUTION
These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any
servicing other than that contained in the operating instructions unless you are qualified to do so.
WARNING!!
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of
this receiver is directly connected to the ac power line.
!SAFETY-RELATED COMPONENT WARNING!!
Components identified by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe
operation. Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements
published by Sony. Circuit adjustments that are critical for safe operation are identified in this manual. Follow these procedures
whenever critical components are replaced or improper operation is suspected.
ATTENTION!!
Ces instructions de service sont à l’usage du personnel de service qualifié seulement. Pour prévenir le risque de choc électrique, ne
pas faire l’entretien autre que celui contenu dans le Mode d’emploi à moins que vous soyez qualifié faire ainsi.
Afin d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.
! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identifies par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces
sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants Sony dont le numero
de piece est indique dans le present manuel ou dans des supplements publies par Sony. Les reglages de circuit dont l’importance
est critique pour la securite du fonctionnement sont identifies dans le present manuel. Suivre ces procedures lors de chaque
remplacement de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.
☛
☛

KDP-51WS655/57WS655
KDP-51WS655/57WS655
7
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered
connections. Check the entire board surface for solder splashes and
bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or
touching high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and
mounting hardware have been replaced. Be absolutely certain that
you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transistors,
that were installed during a previous repair. Point them out to the
customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of
deterioration. Point them out to the customer and recommend their
replacement.
6. Check the line cords for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
7. Check the B+ and HV to see if they are specified values. Make sure
your instruments are accurate; be suspicious of your HV meter if
sets always have low HV.
8. Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
Leakage Test
The AC leakage from any exposed metal part to earth ground and from
all exposed metal parts to any exposed metal part having a return to
chassis, must not exceed 0.5 mA (500 microamperes). Leakage current
can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instructions.
2. A battery-operated AC milliammeter. The Data Precision 245 digital
multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75 V,
so analog meters must have an accurate low voltage scale. The
Simpson’s 250 and Sanwa SH-63TRD are examples of passive
VOMs that are suitable. Nearly all battery-operated digital multimeters
that have a 2 VAC range are suitable (see Figure A).
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate retaining
screw on most AC outlet boxes is also at earth ground. If the retaining
screw is to be used as your earth ground, verify that it is at ground by
measuring the resistance between it and a cold-water pipe with an
ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble-
light (not a neon lamp) between the hot side of the receptacle and the
retaining screw. Try both slots, if necessary, to locate the hot side on the
line; the lamp should light at normal brilliance if the screw is at ground
potential (see Figure B).
Trouble Light
AC Outlet Box Ohmmeter
Cold-water Pip
e
Figure A. Using an AC voltmeter to check AC leakage. Figure B. Checking for earth ground.
To Exposed Metal
Parts on Set
AC Voltmeter
(0.75 V)
Earth Ground
0
.15 µF1.5 kΩ

KDP-51WS655/57WS655
KDP-51WS655/57WS655
8
SELF-DIAGNOSTIC FUNCTION
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to flash. The number
of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED flash indicators is listed in the
instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the Remote Commander can be used to review
the failure occurrence data stored in memory to reveal past problems and how often these problems occur.
Diagnostic Test Indicators
When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem. If there is more than
one error, the LED will identify the first of the problem areas.
Results for all of the following diagnostic items are displayed on screen. If the screen displays a “0”, no error has occurred.
Diagnostic Item
No. of times
STANDBY /
TIMER lamp
flashes
Display
Result Probable Cause Location Detected Symptoms
Power does not turn on Does not light _______ •Power cord is not plugged in.
•Fuse is burned out (F6000). (GBoard) •Power does not come on. •No power is supplied to the TV.
•AC Power supply is faulty.
+B Overcurrent (OCP)* 2 times 2:0 or 2:1 •H.OUT (Q5001) is shorted. (D Board)
•+B PWM (Q5201) is shorted.
(D Board)
•Power does not come on.
•Load on power line shorted.
+B Overvoltage (OVP) 3 times 3:0 or 3:1 •IC6503 is faulty. (D Board) •Has entered standby mode.
Vertical Deflection Stopped 4 times 4:0 or 4:1 •15V is not supplied. (D Board)
•IC5101 is faulty. (D Board) •Has entered standby mode after
Horizontal raster.
•Vertical deflection pulse is stopped.
•Power line is shorted or power
supply is stopped.
White Balance Failure
(not balanced) 5 times 5:0 or 5:1 •Video OUT (IC9101, IC9201, IC9301)
is faulty. (CR, CG, CB Board)
•CRT drive (IC452) is faulty.
(A Board)
•G2 is improperly adjusted.**
•No raster is generated.
•CRT cathode current detection
reference pulse output is small.
LOW +B OCP/OVP
(overcurrent/overvoltage)*** 6 times 6:0 or 6:1 •+5 line is overloaded.
(A and BH Boards)
•+5 line is shorted. (A and BH Boards)
•IC303 is faulty. (A Board)
•No picture
Horizontal Deflection
Stopped 7 times 7:0 or 7:1 •Q5006 is broken (D Board)
•IC452 is faulty (A Board) •No picture
Audio Protection 8 times 8:0 or 8:1 •+ or - 22V audio supply is not
present—Check PS600 &PS601
•Audio AMP is damaged IC601 on
A Board
•No picture
Zero Crossing Detector 9 times 9:0 or 9:1 •D6116 or D6301 is open (GBoard) •No picture
HV Protection 10 times 10:0 or
10:1 •Q8014 or Q8013 have shorted replace
along with R8051 on D Board
•IC8005 is damaged (D Board)
•No picture
* If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously. The symptom that is diagnosed first by the
microcontroller is displayed on the screen.
** Refer to Screen (G2) Adjustment (Fine Adjustments) in Section 2 of this manual.
*** If STANDBY/STEREO LED flashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment.
Self Diagnosis
Supported model

KDP-51WS655/57WS655
KDP-51WS655/57WS655
9
Display of Standby/Timer LED Flash Count
STAND BY Indicator
TIMER Indicator
Diagnostic items Flash count
Lamp OFF 3 sec.
Lamp ON 0.3 sec.
Lamp OFF 0.3 sec.
+B Overcurrent 2 times
Low +B Overvoltage 3 times
Vert. Deflection Stopped 4 times
White Balance Failure 5 times
Low +B OCP/OVP 6 times
Horiz. Deflection Stopped 7 times
Audio Protection 8 times
Zero Crossing Detector 9 times
HV Protection 10 times
Release of TIMER STAND BY indicator blinking
The TIMER/STANDBY indicator blinking display is released by turning OFF the power switch on the TV main unit or removing the plug from the power.
Self-Diagnosis Screen Displays
In cases of malfunctions where it is not possible to determine the symptom such as when the power goes off occasionally or when the screen
disappears occasionally, there is a screen display on whether the malfunction occurred or not in the past (and whether the detection circuit operated or
not) in order to allow confirmation.
Screen Display Method
Quickly press the remote command button in the following order from the standby state.
Display Channel 5Sound Volume* _Power ON
*Note that this differs from entering the service mode (sound volume +)
Numeral “0”
means that no fault was detected.
Numeral “1”
means a fault was detected one
time only.
SELF DIAGNOSIS
2: +B OCP 0
3: +B OVP 0
4: VSTOP 0
5: AKB 1
6: LOWB 0
7: H-STOP 0
8: AUDIO 0
9: ZCD 0
10: HV PROT 0
101: WDT 24
Self-Diagnosis Screen Display
The results display is not automatically cleared. In case of repairs and after repairs, check the self-diagnosis screen and be sure to return the results
display to “ 0 ”.
If the results display is not returned to “ 0 ” it will not be possible to judge a new malfunction after completing repairs.
Method of Clearing Results Display
1. Power off (Set to the stand by mode.)
2. Display Channel 5Sound Volume +Power ON (Service Mode)
3. Channel 8ENTER (Test reset = Factory preset condition)
Method of Ending Self Diagnosis Screen
When ending the self-diagnosis screen completely, turn the power switch OFF on the remote commander or the main unit.

KDP-51WS655/57WS655
KDP-51WS655/57WS655
10
Self-Diagnosis Function Operation
+B overcurrent (OCP)
Occurs when excessive current flows through R6812. The increase in voltage across Q6803 causes it to turn on which sends a high signal to the
micro.
+B overvoltage (OVP)
IC6801 detects +B OVP condition and turns on Q6802. This sends a high signal to the micro and also shuts down the AC relay.
V-STOP
Occurs when an absence of the vertical deflection pulse is detected by pin 56 of IC452 (A Board). Power supply will shut down when waveform interval
exceeds 2 seconds.
White Balance Failure
If the RGB levels* do not balance within 2 seconds after the power is turned on, this error will be detected by IC452 (A Board). TV will stay on, but
there will be no picture.
*(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).
Low B OCP/OVP
Occurs when set 5V is out.
Also check for : + 135V line shorted
+ 135V line is going over 145V
Horizontal Deflection Stopped
Occurs when either:
1) a +B overcurrent is detected (Q6803), or
2) IC452 (A Board) is damaged.
Self-Diagnosis Block Diagram
3
1
2
R5104 R5105
R5125
Q5018
RY6000
Q6102
Q451
Q452
D452
D6803
D6505
D453
R6812
D6805
R6803
IC6801 Q6802
1K-PROT2
+B OCP
+BVOP
5V
+B OCP
21
34
IC5007
VDY-
CRT
IC452
Y/C JUNGLE
SCL
SDA
AKB
VPROT
HPROT
IC702
MAIN MICRO
A
CLKO
DATO
AC RLY
LOW B ERR
OVP
OCP
STR
STBY-LED
STBY-LED
P_SW(-)
IC303
5V
+B
+B +B
BH
A
D
D
A
2 14
57
56
58
53
52
28
31
69
43
44
45
48
3
12
G

KDP-51WS655/57WS655
KDP-51WS655/57WS655
11
1-1. REAR BOARD REMOVAL
SECTION 1: DISASSEMBLY
1-2. CHASSIS ASSEMBLY REMOVAL
13 Screws (KDP-51WS655 Only)
12 Screws (KDP-57WS655 Only)
Dome Washer Hex Tap 4 x 20
1
Rear board
2
Chassis assy
2
Three screws Dome Washe
r
1(Hex Tap 4 x 20)

KDP-51WS655/57WS655
KDP-51WS655/57WS655
12
1-3. SERVICE POSITION
1-4. TERMINAL BOARD, P BOARD AND Q BOX ASSEMBLY REMOVAL
Covers
Remove covers from chassis assembly
with pliers when checking printed circuit boards.
After checking, turn the covers over
and re-secure them with the screws.
Screws
(+BVTP 3x12)
Chassis assembly
Free wiring from purse locks.
NOTE: Observe wire dress
and return to original condition.
1
2
Terminal board
Six screws (+BVTP 3x12)
Main bracket
2
Two screws
Dome Washer Hex Tap 4 x 20
1
Two screws
(M3 X 8) P, SW(+)
Two screws
+BVTT 3 X 8
Four screws
+BVTT 3x8
6
5
4
P board
Disconnect Ground Wire and Cable
3
8Disconnect Ground Wire and Cable
7
Two screws +BVTT 3 X 8
Q Box Assembly

KDP-51WS655/57WS655
KDP-51WS655/57WS655
13
Claws
Main bracket
4
Four screws
(+BVTP 3x12)
Seven screws
(+BVTP 3x12)
G board
D board
A board
1
2
Two screws
(+BVTP 3x12)
3
1-6. A BOARD, D BOARD, AND G BOARD REMOVAL
1-5. BH BOARD REMOVAL
Main bracket
Pull gently back on clips
to release
1
2
3
BM board
Pry apart shield
to remove BM board

KDP-51WS655/57WS655
KDP-51WS655/57WS655
14
CAUTION: Removing the arrow-marked screws is strictly prohibited. If removed, it may cause liquid to spill.
Four screws
Dome Washer Hex Tap 4x20
Four screws
(+BVTP 4x12)
Picture tube
Picture tube
Deflection yoke
Four screws
(2 per side)
Dome Washer
Hex Tap 4x20
Four screws (2 per side)
Dome Washer Hex Tap 4x20
Neck assy
CR board
Lens
Lens
2
1
7
8
9
10
11
5Shade
6
4
3
1-8. PICTURE TUBE REMOVAL
(2) Installation
Gutter
HV cabl
e
Hook 1
Rubber cap
HV cable
turn 90
1
2
(1) Removal
1-7. HIGH-VOLTAGE CABLE INSTALLATION AND REMOVAL

KDP-51WS655/57WS655
KDP-51WS655/57WS655
15
Input Terminal Bracket
Four screws
Input Terminal Cover
Two screws
(+BVTP 3x12)
Dome Washer
Hex Tap 4 x 20
5
4
Six screws Dome Washer Hex Tap 4x20
-3 per side
1
Input Terminal Plate
Two screws
(+BVTP 3x12)
HB3 board
6
Four screws
(+BVTP 3x12)
The Speaker Grille Assy
Note:
The Speaker Grille Assy
is securely attached.
A
fter removing the screws
pull firmly out (from the bottom)
then down to release it.
HA2 board
2
23
1-9. SPEAKER GRILLE, HA2 BOARD, AND HB3 BOARD REMOVAL

KDP-51WS655/57WS655
KDP-51WS655/57WS655
16
1-10.BEZNET ASSEMBLY REMOVAL
Four screws
Dome Washer
Hex Tap 4x20
Nine screws
Dome Washer Hex Tap 4x20
3
Four screws Dome Washer Hex Tap 4x20
-2 per side
2
1
4
Four screws Dome Washer Hex Tap 4x2
0
-2 per side
Beznet assy
1-10-1.SCREEN TAPE METHOD
The following demonstrates the taping method when replacing the Contrast Screen or Diffusion Plates.
For Part Numbers refer to the Miscellaneous section in the back of the manual.
Tape,Acetate (P2412) 25x30M
Top
Tape,Acetate (P2412HD) 25MMx30M
Contrast Screen
1
2

KDP-51WS655/57WS655
KDP-51WS655/57WS655
17
L screen
holder
Claws
SR board
Sensor
bracket (B)
One screw
(+BVTP 4x12)
Four screws
(+BVTP 4x12)
One screw
(+BVTP 4x12)
Sensor
bracket (A)
6
5
3
1
2
4
1-11.SR BOARD REMOVAL
The Screen Holder does not need
to be removed in order to remove
the SR boards.

KDP-51WS655/57WS655
KDP-51WS655/57WS655
18
WIRE DRESSING

KDP-51WS655/57WS655
KDP-51WS655/57WS655
19

KDP-51WS655/57WS655
KDP-51WS655/57WS655
20