Sony bravia klv-40x450a User manual

SERVICE MANUAL
EG1H CHASSIS
LCD Colour TV
RM-GA014 KLV-40X450A/46X450A/55X450A
MODEL
KLV-40X450A
KLV-46X450A
KLV-55X450A
COMMANDER
RM-GA014
RM-GA014
RM-GA014
DEST.
E
E
E
MODEL
KLV-40X450A
KLV-46X450A
KLV-55X450A
COMMANDER
RM-GA014
RM-GA014
RM-GA014
DEST.
GE
GE
GE
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KLV-40/46/55X450A (E, GE) 2
SPECIFICATIONS
Model name KLV-40X450A KLV-46X450A KLV-55X450A
System
Panel system LCD (Liquid Crystal Display) Panel
TV system B/G, I, D/K, M
Colour/video system PAL, PAL60 (only video input), SECAM, NTSC 3.58, NTSC 4.43 (only video input)
Channel coverage B/G:VHF: E2 to E12/ UHF: E21 to E69/ CATV: S01 to S03, S1 to S41
VHF: 0 to 12, 5A, 9A/ UHF: 28 to 69/ CATV: S01 to S03, S1 to S44 (Australia only)
VHF: 1 to 11/ UHF: 21 to 69/ CATV: S01 to S03, S1 to S41 (New Zealand only)
I: UHF: B21 to B69/ CATV: S01 to S03, S1 to S41
D/K:VHF: C1 to C12, R1 to R12/ UHF: C13 to C57, R21 to R60/ CATV: S01 to S03, S1
to S41, Z1 to Z39
M: VHF: A2 to A13/ UHF: A14 to A79/ CATV: A-8 to A-2, A to W+4, W+6 to W+84
Sound output 10 W + 10 W, 12 W + 12W (Woofer)
Input/Output jacks
Antenna 75 ohm external terminal for VHF/UHF
1S video input (4-pin mini DIN)
1, 2, 3 Video input (phono jacks)
1, 2 Supported formats: 1080p, 1080i, 720p, 576p, 576i, 480p, 480i
Y: 1 Vp-p, 75 ohms, 0.3V negative sync/PB/CB: 0.7 Vp-p, 75 ohms/
PR/CR: 0.7 Vp-p, 75 ohms
1, 2, 3 Audio input (phono jacks)
HDMI IN1, 2, 3, 4 Video: 1080/24p, 1080p, 1080i, 720p, 576p, 576i, 480p, 480i
Audio: Two channel linear PCM: 32, 44.1 and 48 kHz, 16, 20 and 24 bits
Analogue audio input (minijack) (HDMI IN 1 only)
PC Input
Audio output (phono jacks)
PC IN (RGB) PC Input (D-sub 15-pin)
G: 0.7 Vp-p, 75 ohms, non Sync on Green/B: 0.7 Vp-p, 75 ohms/
R: 0.7 Vp-p, 75 ohms/HD: 1-5 Vp-p/VD: 1-5 Vp-p
PC audio input (minijack)
DMPORT DIGITAL MEDIA PORT
USB port
Headphones jack
LAN 10BASE-T/100BASE-TX connector (Depending on the operating environment of the
network, connection speed may differ. 10BASE-T/100BASE-TX communication rate
and communication quality is not guaranteed for this TV.)
Power and others
Power requirements
Screen size (measured diagonally) 40 inches (Approx.
101.6cm)
46 inches (Approx. 116.8cm) 55 inches (Approx. 138.8cm)
Display resolution 1,920 dots (horizontal) ×1,080 lines (vertical)
Power
consumption
in “Home”/“Standard”
mode
210 W 270 W 370 W
in “Shop”/“Vivid” mode 230 W 350 W 480 W
Standby power consumption*
Start” is set to “On”) Start” is set to “On”) Start” is set to “On”)
Dimensions
(Approx.)
(w ×h ×d)
with Table-Top Stand 1,128 ×655 ×279 mm 1,259 ×737 ×315 mm 1,486 ×855 ×356 mm
without Table-Top Stand 1,128 ×603 ×125 mm 1,259 ×685 ×144 mm 1,486 ×803 ×147 mm
Mass (Approx.) with Table-Top Stand 27.0 kg 38.0 kg 54.0 kg
without Table-Top Stand 23.5 kg 33.0 kg 47.5 kg
110 - 240V AC, 50/60 Hz
0.2 W (19 W when “Quick 0.5 W (20 W when “Quick 0.6 W (22 W when “Quick
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KLV-40/46/55X450A (E, GE) 3
*Specified standby power is reached after the TV finishes necessary internal processes.
Design and specifications are subject to change without notice.
PC input signal reference chart for PC and HDMI In 1, 2, 3, 4
*1080p timing when applied to the HDMI input will be treated as a video timing and not a PC timing. This
affects the “Video Settings” menu and “Screen” menu settings.
To view PC contents, set “Game/Text Mode” to “On”, “Wide Mode” to “Full”, and “Display Area” to “Full
Pixel”.
This TV’s PC input does not support Sync on Green or Composite Sync.
This TV’s PC input does not support interlaced signals.
For the best picture quality, it is recommended to use the signals (boldfaced) in the above chart with a 60 Hz
vertical frequency.
Optional
accessories
Wall-Mount Bracket SU-WL500, SU-WL50B
Colour Variation Unit CRU-40SG11 CRU-46SG11 CRU-55SG11
Resolution
Horizontal
frequency (kHz)
Vertical
frequency (Hz)
Standard
Signals Horizontal
(Pixel)
× Vertical
(Line)
VGA 640 × 480 31.5 60 VGA
640 × 480 37.5 75 VESA
720 × 400 31.5 70 VGA-T
SVGA 800 × 600 37.9 60 VESA Guidelines
800 × 600 46.9 75 VESA
XGA 1024 × 768 48.4 60 VESA Guidelines
1024 × 768 56.5 70 VESA
1024 × 768 60.0 75 VESA
WXGA 1280 × 768 47.4 60 VESA
1280 × 768 47.8 60 VESA
1280 × 768 60.3 75
1360 × 768 47.7 60 VESA
SXGA 1280 × 1024 64.0 60 VESA
HDTV 1920 × 1080 67.5 60 CEA-861*
Model name KLV-40X450A KLV-46X450A KLV-55X450A
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KLV-40/46/55X450A (E, GE) 4
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!!
Replace all components with Sony parts whose part numbers
appear as shown in this manual or in supplements
published by Sony.
WARNINGS AND CAUTIONS SAFETY-RELATED COMPONENT
WARNING
It is essential that all critical parts be replaced only with the part
number specified in the electrical parts list to prevent electric
shock, fire, or other hazard.
NOTE: Do not modify the original design without obtaining
written permission from the manufacturer or you will
void the original parts and labor guarantee.
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by
using a wrist band.
When repairing the LCD panel on the wall, the LCD panel must
be secured using the 4 mounting holes on the rear cover.
1) Do not press on the panel or frame edge to avoid the risk of
electric shock.
2) Do not scratch or press on the panel with any sharp objects.
3) Do not leave the module in high temperatures or in areas of
high humidity for an extended period of time.
4) Do not expose the LCD panel to direct sunlight.
5) Avoid contact with water. It may cause a short circuit within
the module.
6) Disconnect the AC power when replacing the backlight (CCFL)
or inverter circuit.
(High voltage occurs at the inverter circuit at 650Vrms.)
7) Always clean the LCD panel with a soft cloth material.
8) Use care when handling the wires or connectors of the inverter
circuit. Damaging the wires may cause a short.
9) Protect the panel from ESD to avoid damaging the electronic
circuit (C-MOS).
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KLV-40/46/55X450A (E, GE) 5
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 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
Ex
p
osed Meta
l
Parts on
S
e
t
0
.1
5
µ
F
Earth
G
roun
d
AC
Vo
ltmeter
o
o
(
0.75V
)
Tr
ouble Li
g
h
t
AC Outlet Box Ohmmeter
C
o
l
d-water Pi
pe
Fi
g
ureA. Usin
g
an AC voltmeter to check AC leaka
g
e. Fi
g
ure B. Checkin
g
for earth
g
round
.
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KLV-40/46/55X450A (E, GE) 6
SELF DIAGNOSIS FUNCTION
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY 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 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 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.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a “0”, no error has occurred .
Number of times STANDBY Monitoring Items Detection
LED (Red) flashes (Screen Display)
2 times POW_ERR1 AAS Board IC2104
79pin: i_lb_err (AD port) < PW_ERR_LEV (Threshold Value)
and
138pin: i_ac_off_det: HIGH
5 times T_CON FBA Board IC5501
1128Pin: TCON_RDY: Low
or
2Detected Error of Cayenne Register
6 times BACKLITE FBA Board IC5501
78Pin: INV_FAIL: LOW
7 times PANLTEMP FBA Board IC5501
IIC_ch2 setting value (BEM data)
8 times AUD_PROT AAS Board IC2104
19pin: i_au_prot: Low
9 times FAN_ERR FBA Board IC5501
pin154: FAN_ERR: High
13 times BALANCER FBA Board IC5501
1163pin: BALANCER_ERR: LOW
or
2SPI_ERR_CNT (SetSREG) >= SPI_ERR_LIM (FactSREG)
DISPLAY OF STANDBY LIGHT FLASH COUNT
STOPPING THE STANDBY FLASH
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY LED for flashing.
2 times
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec. LED OFF
2 sec.
[ FLASH COUNT ]
Note: One flash counts is not self-diagnostic.
STANDBY LED
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KLV-40/46/55X450A (E, GE) 7
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to
bring up past occurrences of failure for confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen
After you have completed the repairs, clear the result display to “0”.
Clearing the result display
To clear the result display to “0”, press button on the remote commander sequentially as shown below when the diagnostic screen is being
displayed.
<Delection of Error Count and Error History>
Press “8” button ,Press “-” button
<Delection of Panel Operation Time>
Press “7” button ,Press “-” button
Quitting Self-diagnostic screen
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
5
* : Note that this differs from entering the service mode (volume +)
( Number button ) * ( Volume ) ( TV standby )
( Info/Text reveal )
002 POW_ERR1
005 T_CON
006 BACKLITE
007 PANL TEMP
008 AUD_PROT
009 FAN_ERR
013 BALANCER
SELF CHECK
12345 - 00333 - 06789
0501210811 0412311234 0311111825 00
0000000000 0000000000 0000000000 00
0000000000 0000000000 0000000000 00
0000000000 0000000000 0000000000 00
0000000000 0000000000 0000000000 00
0000000000 0000000000 0000000000 00
0000000000 0000000000 0000000000 00
Item name
The last failure time
Falure time before last
Last failure time beforehand
Error count (00-99)
Frequency of LED blinking.
Total operation time by hour (max 99999)
Boot count (max 99999)
Panel operation time by hour (max 99999)
[ SELF-DIAGNOSTIC SCREEN DISPLAY ]
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KLV-40/46/55X450A (E, GE) 8
TABLE OF CONTENTS
SPECIFICATIONS .................................................... 2
SELF DIAGNOSIS FUNCTION ................................ 6
TROUBLESHOOTING ............................................. 9
TRIAGE CHART ............................................................. 9
TROUBLE SHOOTING FLOW CHART ..................... 10
1. NO POWER (Ch a r t B) ............................................ 11
2. SET REBOOTS .......................................................... 12
3. SELF DIAGNOSIS ..................................................... 12
3-1. RED LED BLINKS TABLE ............................. 12
3-2. RED LED BLINKS (Chart C) ........................... 12
4. AUDIO PROBLEM (Chart D) ................................... 17
5. VIDEO PROBLOM (Chart E) ................................... 18
6. NO PICTURE ............................................................. 19
BLOCK DIAGRAMS............................................... 25
SPARE PARTS LIST ............................................. 26
KLV-40X450A ............................................................... 26
KLV-46X450A ............................................................... 27
KLV-55X450A ............................................................... 28
PACKING MATERIAL ............................................ 29
KLV-40X450A ............................................................... 29
KLV-46X450A ............................................................... 30
KLV-55X450A ............................................................... 31
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KLV-40/46/55X450A (E, GE) 9
TROUBLESHOOTING
TRIAGE CHART
Symptoms - (dead set) Video - distorted or missing
25678913No
No Video No Video No Video No Tuner No
Reference
Blinks Blinks Blinks Blinks Blinks Blinks Blinks Power BL OK No BL BL OK Video No HDMI Audio
OSD OK No OSD
AGA Board
FBA Board
CB1 Board (46"/55")
H1VM Board
H3VM Board
H4 Board
K2 Board
Touch Sensor Module
G6 board / G7 board (55")
GL Board (46"/55")
D4 Board (40")
Panel Module
LVDS cable between FBA board
and CB1 board
Joint connector of AGA boars
and FBA board
Flowchart Reference CCCCCCCB E E E E E D
Problem Low B+ T-CON BL Temp Audio FAN Balancer
: Doubtful part
: just a few possibility
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KLV-40/46/55X450A (E, GE) 10
Trouble
YES
Set Power NO
Self diagnosis
See
1. No Power
(Chart B)
YES See
3. Self Diagnosis
(Chart C)
NO
See
4. Audio Problem
(Chart D)
See
5. Video problem
(Chart E)
Audio Video
YES
Set Reboots-
NO
See
2. Set Reboots
TROUBLE SHOOTING FLOW CHART
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KLV-40/46/55X450A (E, GE) 11
1. NO POWER (Chart B)
YES
No RED LED
Blinks
NO
5Vdc
CN2800 pin7
on FBA board
See (Chart C)
NO G6 board
(No STBY5V)
YES
NO
110-240Vac
CN6000 on
G6 board
YES
AC cable or AC inlet
No Power
(No relay clicks)
YES
Power key
doesn’t work
NO H1VM board
AGA board
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KLV-40/46/55X450A (E, GE) 12
2. SET REBOOTS
TV micro (on AAS board) is monitoring if BE Micro & EMMA (on FBA board) are alive
or on abnormal status by watch dog timer. When BEM or EMMA has not boot up, TVM
try to re-start. We can see chassis reboot at this case. Check whether FBA board is
supplied with correct power or not.
- FBA board
- CN 2800 12V power and harness to G6 board.
- F2800, F4100, F4101, F4102, F5400, F7800, F7801 conduction.
If power rail has no problem, replace FBA board.
3. SELF DIAGNOSIS
3-1. RED LED BLINKS TABLE
Power Error (watching 12V rail)
T-CON Error
[CCFL] Panel Inverter Error
[LED] GL board Error
Panel Temperature Abnormal Detection
Audio Abnormal Detection
FAN Error -> Not detect (reboot operation)
[CCFL] Panel Balancer Error[
LED-BL] SPI Error (Babylon Communication Error)
ContentsDisplay
(Self Diagnosis mode )
Red LED Blink
When self diagnosis happens, STBY (RED) LED blinks and
the history can be seen on display by self diagnosis mode.
POW ERR1
T_CON
BACKLITE
PANELTEMP
AUD_PROT
FAN_ERR
BALANCER
2
5
6
7
8
9
13
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KLV-40/46/55X450A (E, GE) 13
3-2. RED LED BLINKS (Chart C)
NO
2 times YES
See
1) POW ERR
RED LED Blinks
NO
9 times YES
See
6) FAN ERR
NO
5 times YES
See
2) T-CON ERR
NO
6 times YES
See
3) BACK LIGHT
NO
7 times YES
See
4) TEMP ERR
NO
8 times YES
See
5) AUDIO ERR
13 times YES
See
7) Balancer ERR
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KLV-40/46/55X450A (E, GE) 14
1) Power Err (RED 2 times blink)
This indicates POWER Error, Low B error of 12V from G6 board. TV Micro (on AAS board)
monitors pin79 and pin138 to detect POWER_ERR and shuts down chassis power to
Standby status.
TV Micro pin138 Normal condition : Low / Error case : High
TV Micro pin79 i_lb_err< 0.7V(PW_ERR_LEV)
- Check 12V at CN 1000 on AGA board. And F1001 on AAS has 12V or not.
- Check G6 board.
2) T-CON Error (RED 5 tim es blink)
This indicates T-CON RDY signal error from timing controller of Panel module.
BE micro pin128 on FBA board detects it.
BE Micro pin128 Normal condition : High / Error case : Low
Replace Panel module.
3) Back Light Error (RED 6 times blink)
This indicates panel power circuit error such as inverter.
BE micro pin 78 on FBA board detects it.
BE Micro pin 78 Normal condition : High / Error case : Low
Replace D4 board in case of GL board in case of LED model.
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KLV-40/46/55X450A (E, GE) 15
4) Temp Error (RED 7 times blink)
This indicates high temperature inside chassis. IC1000 on AGA board Side is monitoring
temperature. IC1000 is controlled by BEM I2C.
When it happens;
- Check chassis environment.
- Check around IC1000 and replace AGA board if temperature monitoring circuit has problem.
5) Audio Error (RED 8 times blink)
This indicates Audio Error. (Protection)
It happens;
- Error of Speakers and Harness.
- Digital amp on K2 Board are High Temperature.
Check Voltage at CN1002 20pin on AGA board. ( Low = Normal , High= Error)
If Error , Replace Speaker or Harness or K2 board.
- Low Voltage at IC1800 [ Audio_Vcc(=12V) , A9V , D3.3V ]
- Error of IC1800
Replace AGA board.
.
.
6) FAN Error (RED 9 times blink)
This indicates FAN error. (except 40 inch model)
BE micro pin154 on FBA board detects it.
BE Micro pin154 Normal condition : Low / Error case : High
- Check the harnessconnection of FAN.
- Check the Voltage at CN1301 on AGA board. ( Low = Error , High = Normal)
Replace the FAN.
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KLV-40/46/55X450A (E, GE) 16
7) Balancer Error (RED 13 times blink)
This indicates Balancer board error of panel module.
BE micro pin163 on FBA board detects it.
BE Micro pin163 Normal condition : High / Error case : Low
40”: Check harness connection between CN6706 on D4 board and CN104 on
inverter board of panel module.
46”, 55”: Check harness connection between CN 9700, 9701 on CB1 board and panel
module.
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KLV-40/46/55X450A (E, GE) 17
4. AUDIO PROBLEM (Chart D)
Here is trouble shooting flow related audio
Audio
problem
Only
Speaker out?
YES
NO
UI setting
correct?
Volume, SP off/On
HP Link
Analog
Channel
Problem ?
Digital
Channel
Problem?
HDMI
Problem ?
Set correctly or
reset by menu.
Check
Speaker
AGA board
K2 board
NO
YES
NO NO
Check
FBA board
AGA board
K2 board
Joint connector
Check
AGA board
Check
FBA board
AGA board
Joint connector
YES YES
YES
NO Check
AGA board
K2 board
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KLV-40/46/55X450A (E, GE) 18
5. VIDEO PROBLOM (Chart E)
Here is trouble shooting flow related Video
Video
problem
All inputs
have
problem?
YES
NO
Digital
/Analog
Channel
Problem ?
Component
Problem?
HDMI
Problem ?
Check
LVDS harness
G6/G7/GL boards
FBA board
Panel Module
CB1 board
D4 boards
NO NO
Check
FBA board
AGA board
Joint connector
Check
FBA board
AGA board
Joint connector
Check
FBA board
AGA board
Joint connector
YES YES YES
NO
NO
Check
FBA board
YES YES
Back Light
turn on?
OSD
appear ?
NO
Check
LVDS harness
FBA board
CB1 board
VCBS
Problem?
Check
AGA board
YES
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KLV-40/46/55X450A (E, GE) 19
No Picture
Power-ON_LED
Light
STBY_3.3V
OK?
G6 board has problem.
Change G6 board.
No No
Yes
Yes
STBY_LED
Blinking?
Yes
2 times blinking
6 times
blinking
Yes Yes
No
No
Signal board has problem.
Check signal-board
G6 board has problem.
Change G6 board.
No Signal board has problem.
Check signal-board
AC_OFF_DET
more than 3V
Yes
G6 board has problem.
Change G6 board.
No
CN6150 9pin
more than 3V
Yes
Signal board has problem.
Check signal-board
No
G6 board has problem.
Change G6 board.
CN6150 1-4pin
=12±1V
Signal board has problem.
Check AGA board
Yes
No
6. NO PICTURE
1) G6 Board (40 inch)
to
2) G4 board check
Power-ON
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10/30/2018
Digitized in Heiloo the Netherlands
Not for sale!

KLV-40/46/55X450A (E, GE) 20
STBY-LED
6 times blinking
CN6702 2pin
Is Dimmer signal normal?
Yes
CN6702 3pin
more than 3V?
Yes
No
No
Signal board has problem.
Check signal-board
Signal board has problem.
Check signal-board
D4 board has problem.
Change D4 board.
STBY-LED
13 times blinking
CN6701 6,7pin
less than 1V?
Yes
No
Panel has problem.
Check Panel
D4 board may have problem.
Change D4 board.
Signal board h as problem.
Check signal- board
Picture OK? No
D4 board is no problem.
Change back PS board.
2) D4 Board check
Yes
D4 board has broken
Back-Light on
DIMMER
LD-signal
www.freeservicemanuals.info
10/30/2018
Digitized in Heiloo the Netherlands
Not for sale!