Sony Bravia KF-42E200A User manual

LCD PROJECTION TELEVISION
SERVICE MANUAL LA-4 CHASSIS
MODEL NAME REMOTE COMMANDER DESTINATION
9-883-719-01
KF-42E200A RM-YD010 CANADA
KF-42E201A RM-YD010 MEXICO
KF-50E200A RM-YD010 CANADA
KF-50E201A RM-YD010 MEXICO
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 8/2006
REVISION DATE SUBJECT
8/2006 No revisions or updates are applicable at this time.

LCD PROJECTION TELEVISION
SERVICE MANUAL LA-4 CHASSIS
MODEL NAME REMOTE COMMANDER DESTINATION
9-883-719-01
KF-42E200A RM-YD010 CANADA
KF-42E201A RM-YD010 MEXICO
KF-50E200A RM-YD010 CANADA
KF-50E201A RM-YD010 MEXICO
Self Diagnosis
Supported model
KF-42E200A RM-YD010

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
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............................................................... 13
1-1. Overview .............................................................................. 13
1-2. Rear Cover Removal............................................................ 14
1-3. Chassis Removal and Service Position ............................... 15
1-4. G Board Removal................................................................. 15
1-5. B2 Block Assembly, A Block Assembly,
Antenna, U Board and K Board Removal ............................ 16
1-6. Lamp Block Assembly and Optical Block Removal.............. 17
1-6-1. Lamp Connector and T2 Board Removal ................ 18
1-6-2. Lamp Driver Fan Removal....................................... 19
1-7. HC Board Removal .............................................................. 20
1-8. HA Board and HB Board Removal....................................... 20
1-9. Screen Frame Assebmly and Speaker Removal ................ 21
1-10.Mirror Assembly and Mirror Cover Assembly Removal........ 22
Wire Dressing....................................................................... 23
SECTION 2: CIRCUIT ADJUSTMENTS.............................................. 36
2-1. Using the Remote Commander for Electrical Adjustments .. 36
2-2. Accessing Service Adjustment Mode ................................... 36
2-3. Using the Remote Commander to Change Service Data .... 36
2-3-1. Exiting Service Mode............................................... 37
2-4. Verifying Service Data Changes .......................................... 37
2-5. H/V Center Confirmation and Adjustments .......................... 37
2-6. IRIS Adjustments.................................................................. 38
SECTION 3: DIAGRAMS..................................................................... 39
3-1. Circuit Boards Location ........................................................ 39
3-2. Printed Wiring Boards and
Schematic Diagrams Information ......................................... 39
3-3. Signal Flow Block Diagram .................................................. 41
3-4. Schematics and Supporting Information .............................. 42
A Board Schematic Diagram ................................................ 42
B2 Board Schematic Diagram (1 of 7) ................................. 44
B2 Board Schematic Diagram (2 of 7) ................................. 45
B2 Board Schematic Diagram (3 of 7) ................................. 46
B2 Board Schematic Diagram (4 of 7) ................................. 47
B2 Board Schematic Diagram (5 of 7) ................................. 48
B2 Board Schematic Diagram (6 of 7) ................................. 49
B2 Board Schematic Diagram (7 of 7) ................................. 50
G Board Schematic Diagram (1 of 2) ................................... 52
G Board Schematic Diagram (2 of 2) ................................... 53
HA Board Schematic Diagram ............................................. 56
HB Board Schematic Diagram ............................................. 58
HC Board Schematic Diagram ............................................. 60
K Board Schematic Diagram................................................ 62
S2 Board Schematic Diagram.............................................. 65
T1 Board Schematic Diagram .............................................. 68
T2 Board Schematic Diagram .............................................. 68
U Board Schematic Diagram................................................ 73
3-5. Semiconductors ................................................................... 75
SECTION 4: EXPLODED VIEWS ........................................................ 76
4-1. Covers.................................................................................. 76
4-2. Chassis ................................................................................ 77
4-3. Optics Unit Block Assembly and Lamp Assembly ................ 78
SECTION 5: ELECTRICAL PARTS LIST............................................ 79
APPENDIX A: REPLACING THE LAMP............................................A-1

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
4
SPECIFICATIONS
Design and specifications are subject to change without notice.
120V AC, 60Hz
200W
Less than 0.8W
HDMI IN
2 Video - 1080i, 720p, 480p, 480i, PC
1 Audio - Two channel linear PCM 32, 44.1 and 48 kHz,
16, 20, and 24 bit
Video (IN)
3 total (1 on side panel)
1Vp-p, 75ohms unbalanced, sync negative
S Video (IN)
1 total
Y: 1Vp-p, 75ohms unbalanced, sync negative
C: 0.286Vp-p (Burst signal), 75ohms
Audio (IN)
5 total (1 on side panel)
500 mVrms (100% modulation)
Impedance:47 kilo ohms
Power Requirements
Power Consumption (W)
In Use (Max)
In Standby
Inputs/Outputs Component Video Input
3 (Y, PB/CB) (1 on Side Panel)
Y: 1.0 Vp-p, 75 ohms unbalanced, sync negative
PB
:
0.7 Vp-p, 75 ohms;
PR: 0.7 Vp-p, 75 ohms
Audio (VAR/FIX) Out
1 total
500 mVrms at the maximum volume setting
(Variable)
500 mVrms (Fixed)
Impedance (Output):2 kilo ohm
RF Input
1 total
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Trademark Information
As an ENERGY STAR®Partner, Sony
Corporation has determined that this product
meets the ENERGY STAR®guidelines for
energy efficiency.
ENERGY STAR®is a U.S. registered mark.
TruSurround XT, SRS and the ( )®symbol are
trademarks of SRS Labs, Inc. TruSurround XT
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.
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.
Macintosh is a trademark licensed to Apple Computer, Inc.,
registered in the U.S.A and other countries.
WEGA, Grand WEGA, WEGA GATE, Steady Sound,
Digital Reality Creation and CineMotion
are registered trademarks of Sony Corporation.

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
5
Television system
American TV standard, NTSC
Channel coverage
Terrestrial 2-69/ Cable TV: 2-125 (analog)
Screen Size (measured diagonally)
42 inches (KF-42E200A/42E201A Only)
50 inches (KF-50E200A/50E201A Only)
Antenna
75-ohm external antenna terminal for VHF/UHF
Projection System
3 LCD Panels, 1 lens projection system
LCD Panel
0.73 inch TFT LCD panel
(1,280 x 720 pixels)
Projection Lens
High Performance, large diameter hybrid lens F2.4
Lamp
100W, XL-2400 Ultra High Pressure Lamp
Supplied Accessories
Remote Commander RM-YD010
Two Size AA (R6) Batteries
Operating Instructions
Quick Setup Guide
Warranty Card
Product Registration Card
Optional Accessories
HDMI Cable
HDMI-to-DVI Cable
Component Video Cable
S VIDEO Cable
A/V Cable
Audio Cable
TV Stand:
SU-RG11S (KF-42E200A/42E201A Only)
SU-RG12S (KF-50E200A/50E201A Only)

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
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.

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
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 milliampmeter. 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).
To Exposed Metal
Parts on Set
0.15 µF
Earth Ground
AC
Voltmeter
(0.75V)
Trouble Light
AC Outlet Box Ohmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage. Figure B. Checking for earth ground.

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
8
SELF-DIAGNOSTIC FUNCTION
Self Diagnosis
Supported model
The units in this manual contain a self-diagnostic function. If an error occurs, the POWER/STANDBY will automatically begin to flash. The number of
times the LED flashes translates to a probable source of the problem. A definition of the POWER/STANDBY flash indicators is listed in the instruction
manual for the user’s knowledge and reference. If an error symptom is difficult to reproduced use the Remote Commander to display the record that is
stored at the internal NVM to specify the cause of the failure.
Diagnostic Test Indicators
When an error occurs, the POWER/STANDBY will flash a set number of times to indicate the possible cause of the problem. If there is more than
one error, the POWER/STANDBY will identify the first of the problem areas. If the errors occur simultaneously, the one that corresponds to the fewest
flashes is identified first.
Results for all of the following diagnostic items are displayed on screen. (No error has occurred if the screen displays a “0”.)
Detected symptoms
Lamp cover /
Lamp position error
Temp error
3 times
2 times
4 times
5 times
6 times
8 times
- Lamp cover is not
securely attached (T1 Bd)
- Set temperture is high.
- Temp sensor connector
is not attached securely.
(CN110 on HB board,
CN160 on S2 board)
-Lamp is not inserted
properly (T2 Bd)
Diagnosis Item
Number of times
POWER/STANDBY
indicator blinks
Probable Cause/
Location
Lamp driver error -Lampdriverisfaulty.
LowB LVP
Thermal Fuse Open
- Check 10.5V audio IC
(B2 Board)
- Lamp is burnt out.
LowB OVP -B -10.5V is over voltage.
(B2 board)
- Fan 1-4 power is not
supplied. (B2 board)
-F
-Fan caught wires or
harnesses.
an connector is not
securely attached ..
Lamp Error LAMP-LED flashes
- No Picture/No sound
- No Picture/No sound
- No Picture/No sound
- No Picture/No sound
- Relay click on/off
- No Picture/No sound
- No Picture/No sound
Fan error

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
9
DISPLAY OF POWER/STANDBY OR LAMP LED FLASH COUNT
PUSH OPEN
POWER/STANDBY
POWER
TIMER LAMP
Indicators
Screen
- Oneflashisnotusedfor self-diagnosis.
-Example
Diagnosis Number of times LED Flash
Lampcover 3 times
Fan 4 times
LED ON: 0.3sec
LED OFF : 0.3sec LED OFF
3.0sec
RELEASING THE POWER/STANDBY LED FLASH
Unplug the power cord from the outlet to temporarily stop the POWER/STANDBY lamp from flashing.
Self-Diagnostic Screen Display
For failures that are difficult to reproduce, or accompany occasional power off and/or picture mute, the Self-Diagnostic screen display is useful to
specify the cause.
VIEWING THE SELF-DIAGNOSTIC SCREEN
1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander within a second of each other:
DISPLAY Channel
5 Volume -
POWER
NOTE: This differs from the method of accessing service mode which is Volume +
Sample Self-Diagnostic Screen Display
SELF CHECK
1 : LAMP_ERR 0
0
2 : Lamp Temp Over 0
3:
4:
LAMP_ COVER
FAN_ERR 1
5 : LAMP_DRIVER
6 : LowB-ERROR 0
0
8 : D_OVP 0
WDT101 : 0
Name: KF-42E200A
Serial: XXXXXXX
"1" is displayed when an error is detected one or more times
"0" is displayed when no error has been detected
NOTE: To refresh the Self Check menu when all the items are not displayed, press JUMP on the Remote Commander.
3. Proceed to Viewing the Self-Diagnostic Errors.

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
10
CLEARING THE SELF-DIAGNOSTIC SCREEN
The self-diagnostic results displayed on the screen are not cleared automatically, therefore you should always check the self-diagnostic screen during
repairs. When you have completed the repairs, clear the self-diagnostic screen to reset the results to “0”.
Note: The self-diagnostic function will not be able to detect any subsequent faults after completion of the repairs unless the Self-Diagnostic
result display is cleared to reset the results to “0”.
1. If the Self-Diagnostic screen is already displayed, proceed to step 3. If not, Power off (Set to Standby mode).
2. Press DISPLAY Channel
5 Sound Volume -
POWER
3. Press Channel 8
ENT
The status in the upper right corner changes to “WRITE”. When the operation is complete, the status returns to “SERVICE” and the Self-Diagnostic
screen is reset.
4. To exit the Self-Diagnostic screen, turn the power off.
SELF-DIAGNOSTIC FUNCTION OPERATION
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KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
11
SELF-DIAGNOSTIC BLOCK DIAGRAM
FAN 1
FAN 2
FAN 3
FAN 4
S2 BOARD
IC160
TEMP
SENSOR
IC110
TEMP
HB BOARD
SENSOR
G BOARD B2 BOARD
137
I_FAN_PROT
129
126
LB-ERROR
D_OVP
10.5V
I2C
I2C
I2C
I2C
T1 BOARD
T2 BOARD
3
1
SW
3
SW
1
HV-DET
LAMP DRIVER
150
I_LAMP_COVER
I_LAMP_PROT
151
I_HV_DET
152
IC3002
TV Micro-computer
3
3
2
2
CN6800
CN6805
CN6801
CN6802
9
8
10
11
7
1
CN6804
CN6803
10
6
12
CN6904
2
CN6904 CN3002
2
CN3002
12
6
10

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
12
READING LAMP AND PANEL TIME
The TV_Micro menu of the Service Menu displays the current lamp and
panel time of a set. The Lamp Hours and Panel Hours are shown in
hexadecimal format.
1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander within a
second of each other:
DISPLAY Channel
5Volume
+
POWER .
(For more information regarding the Service Menus, see
2-2. Accessing Service Adjustment Mode.)
VERSION 00 SERVICE
VERS Wide Zoom Video 1
WSL: 480I
3. To read the Lamp time, press 5to display the TIME category and
then press 1to display the LMPH item.
The screen displays:
Wide Zoom TV
TIME 0 0 SERVICE
LMPH
LMPH: 01H LMPL: A0H
Total LAMP TIME is 416 hours
Total hours 256 Total hours 160
4. To read the Panel time, press 1to display the PNLH item.
Wide Zoom TV
TIME 0 0 SERVICE
PNLH
PNLH: 01H PNLL: A0H
The screen displays:
Total PANEL TIME is 416 hours
Total hours 256 Total hours 160
5. Do one of the following:
a. If you have replaced the lamp, proceed to step 4 of “Resetting the
Lamp Time”.
b. If you have not replaced the lamp, turn off the set by pressing
POWER
RESETTING THE LAMP TIME
When replacing the lamp, use the following to reset the lamp time.
1. If the Self-Diagnostic screen is already displayed, proceed to step 4.
If not, Power off (Set to Standby mode).
2. Press DISPLAY Channel
5 Sound Volume -
POWER
3. To access the Lamp reset, press 5until the TIME category displays.
4. Press 1until the RSET item displays.
Wide Zoom TV
TIME 0 0 SERVICE
RSET
5. To reset the Lamp time, press 3to change the data value to 1.
Wide Zoom TV
TIME 0 1 SERVICE
RSET
6. Press MUTING
ENT to write the change into memory.
Wide Zoom TV
TIME 0 1 WRITE
RSET
6. To verify the Lamp has been reset, press 5until the TIME category
displays, and then press 1until the LMPH item displays.
NOTE: You cannot reset the Panel time with the Service menu.
EXITING SERVICE MODE
After completing the changes, exit service mode by turning off the set
using the Remote Commander or the power switch.
NOTE: After exiting service mode wait 2 minutes before restarting
the set to allow the fans to shut down properly.

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
13
SECTION 1: DISASSEMBLY
1-1. OVERVIEW
The connectors in this chassis have been redesigned to ensure they are securely fasten to the boards. Please review the illustra-
tions below.
TOOLS NEEDED
Long Phillips Screwdriver
Needle Nose Pliers
Small Flathead Screwdriver or Jewelers Screwdriver
LIFT ONE SIDE AT A TIME
BY PUSHING TAB IN WITH
SMALL SCREWDRIVER
TYPE 1 TYPE 2
SQUEEZE DOWN ON
TAB TO RELEASE
SQUEEZE LOCKING TAB
TOWARDS CONNECTOR
BEFORE PULLING FREE
TYPE 3
CAUTION! IF THE TYPE 2 FEMALE
CONNECTOR HAS A SLOT (AS SHOWN)
MAKE SURE THE LOCK TAB SEATS INSIDE
THIS SLOT.
Use caution not to rock the Type 2 or Type 3 connectors when removing or reinstalling to avoid breaking the solder leads off the
Printed Circuit Boards.

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
14
3
Lamp door
1
2
1-2. REAR COVER REMOVAL
Lamp door
Turn the handle until it is in
the CLOSE position
Lamp door
When reassembling the rear cover, be sure to securely lock
the lamp door to avoid a lamp cover failure warning.
1
Pull down the claw to release the Lamp Door
2
Remove the Lamp Door
3
Remove 11 screws (+BVTP2 4X16) (42” models),
13 screws (+BVTP2 4X16) (50” models),
to remove the Rear Cover
NOTE: The USB connector
is only to be used by Service
Technicians for the purpose
of upgrading software.

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
15
1-3. CHASSIS REMOVAL AND SERVICE POSITION
3
1
4
2
5
6
78
1
Remove 2 screws to release the Left Stay
2
Disconnect CN8400 from U Board
3
Disconnect CN2500 from K Board
4
Release wires from purse locks
5
Gently pull chassis out towards the right of the TV to access
connectors on B2 Block Assembly.
6
Disconnect CN308 and CN3750 on B2 Block Assembly
7
Release connectors from Wire Holders
8
Remove 4 screws to release the G Board
9
Remove 6 screws to detach Metal Shield from G Board
Using the picture above as a reference, disconnect CN6018,
CN6801, CN6804, CN6803, CN6800, CN6805, CN6900,
CN6901, CN6009, CN6002, CN6904, and CN6010.
1-4. G BOARD REMOVAL

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
16
1-5. B2 BLOCK ASSEMBLY, A BLOCK ASSEMBLY, ANTENNA,
U BOARD AND K BOARD REMOVAL
1
Remove 6 screws and 2 hexagon washers to release the
Terminal Bracket from the U Board.
On the U Board, disconnect CN8400 then using a flat
head screw driver gently release the CN3006 connector
from the B2 Board to remove the U Board.
2
Disconnect the coaxial cable to release the antenna
switch. Remove 3 screws then gently lift the A Block
Assembly up to disconnect CN1002 from the B2 Block
Assembly.
3
Using caution remove the LVDS cable from the B2 Board,
then remove 1 screw (connecting the B2 Block Assy & K
Board to the Main Bracket) and lift up on the tab of the
Main Bracket to release the B2 Block Assembly.
4
Using tweezers gently pinch the fan dampers to release
the fan.
5
On the K Board, disconnect CN2502 then remove 1
screw to release the K Board. Gently pull the K Board out
of the Main Bracket.
2
5
4
1
3
A Block Assembly
LVDS Connection
B2 Block Assembly
U Board
K Board

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
17
0
11
1-6. LAMP BLOCK ASSEMBLY AND OPTICAL BLOCK REMOVAL
8
9
5
6
23
4
1
Note:Remove the Lamp door and Lamp before removing the Lamp Block Assembly
(See “Replacing the Lamp” in the Appendix section of this service manual.)
S2 Board
T1Board
7
1
Remove 2 screws to release the Right Stay.
2
Disconnect CN150 T1 Board
3
Disconnect CN155 T2 Board
4
Disconnect the Termal Fuse connector.
5
Disconnect CN160 S2 Board
6
Remove 2 screws then pull out the fan cover.
7
Turn the fan cover over to remove the T1 Board and S2
Board.
8
Using caution remove the LVDS cable and 2 screws.
9
Remove 2 screws to release the Lamp Block Assembly and
the Optical Block assembly from the cabinet.
0
Gently pull the Lamp Block Assembly and the Optical Block
Assembly out of the cabinet.
11
Turn the assemblies around 180 degrees and release the
high voltage lead from the purse lock.

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
18
2
3
1-6-1. LAMP CONNECTOR AND T2 BOARD REMOVAL
1
Pull retaining clip outward to release and drop the high
voltage connector and the T2 Bracket.
2
Separate the HV Connector from the bracket
3
Remove 1 screw to release the T2 Board.
1
1

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
19
Lamp duct cover
Note position of wires
Note: Watch for
fan grommets
NOTE:
Reinsert the
fan grommets
when replacing
the fan
2
3
4
5
6
1
1
From the inside of the assembly, release the 3 claws
securing the fan duct, then remove the fan duct by grasping
as shown.
2
Remove 1 screw.
3
Release 3 clips to detach cover.
4
Remove Fan.
5
Release wire from wire holders.
6
Remove 2 screws.
1-6-2. LAMP DRIVER FAN REMOVAL

KF-42E200A/42E201A/50E200A/50E201A
KF-42E200A/42E201A/50E200A/50E201A
20
1-7. HC BOARD REMOVAL
1
Remove 2 screws to detach the H2 Bracket.
2
Disconnect connector.
3
Remove 2 screws.
1
3
2
1-8. HA BOARD AND HB BOARD REMOVAL
4
3
5
2
HA Board HB Board
1
1
Remove 2 screws from inside the front panel.
2
Using a screwdriver, gently push through the hole to
release the speaker grill.
3
Firmly pull on the speaker grill to detach from the cabinet.
4
Disconnect CN7000 and remove 2 screws to release the
HA Board
5
Disconnect CN7020 and remove 2 screws to release the
HB Board