Sony KDL-46HX855 / KDL-55HX855 Service Manual ▷ View online
KDL-46HX855/55HX855 8
SECTION 2 - TROUBLESHOOTING
2X Blink - Main Power Error
A loss of REG12V from the power supply triggers this protect event. The
usual cause is a failure of the main switching supply. In some instances,
excessive loading on the secondary supply lines can cause the switching
regulator to stop, or fail again, if a replacement board is installed.
3X Blink- DC Regulator/Audio Error/HDMI/Tuner
Several items are monitored on the main board. Any error detected in the
following circuits will cause the television to shut down and generate a 3X
error:
●
Loss of regulated B+ circuits
●
Audio amplifier failure
●
HDMI equalizer IC
●
Tuner demodulator circuits
In most cases, replacement of the main board will remedy a 3X error.
4X Blink – Balancer Error
The 4X error code is only used on models incorporating local dimming LED
backlighting. If a failure occurs on the LD board or one of the LED’s fails in
the panel the TV will shut down and display this diagnostic code. Models
using conventional non-local dimming LED backlighting do not utilize this
error code.
5X Blink - TCON Error
The 5X blink protection mode indicates a communications error between
the TCON Board and the X-Reality microprocessor on the Main Board. If
the TCON is available for replacement, replace the TCON. If the TCON is
not available, the LCD panel must be replaced since the TCON circuit is
part of the LCD panel assembly. In rare cases a loose or defective LVDS
cable could also be the cause.
6X Blink - Converter System Failure
If the converter circuit (located on the power supply or separate converter
board) fails to start or shuts down due to an over-voltage or over-current
condition, the unit will shut down and generate a 6X error code. The
diagnostic page labels this as a Backlight Failure even though the backlights
are not a source of the problem. Replacement of the Power Supply Board
should rectify this problem.
7X Blink - Temperature Failure
If the temperature inside the television becomes excessive, the temperature
sensor (located on the Main Board) notifies the TV to shut down and display
a 7X error. Excessive temperature errors will always occur when the TV
has been running a while and can be caused by excessive ambient heat or
improper ventilation of the television.
8X Blink – Not listed in Self Check
The 8X blink code is mainly used during TV software development. Look in
TV’s service Self Check for error code history and notice at the bottom of
the list WDT (Watch Dog Timer) error codes, in particular notice 103 HOST_
WDT. If this error code appears, check for any additional documentation on
the Sony ESI site.
10X Blink – IR Sync Transmitter Failure
A failure of the infrared sync transmitter circuits on the HEM3 board will
cause a 10X error and replacement of this board will usually rectify the
problem. In rare cases, the Main Board could be the source of the failure.
KDL-46HX855/55HX855 9
SECTION 2 - TROUBLESHOOTING
TRIAGE CHART
Use this general Triage Chart to determine what may possibly be causing the error before going out to the customers location.
Before you make the service call…
1. Confirm the symptom from the customer.
2. Select that symptom from the chart.
▲
3. Bring the primary component listed for that symptom.
3D
o
i
d
u
A
r
e
w
o
P
N
A
L
2X 3X 4X 5X 6X 7X 8X
10X
No
WIFI
Dead set
No Video
Whole
Screen
Distortion
Isolated
Area
Distortion
No 3D
No Audio
Main Board
*
▲
▲
▲
▲
Power Supply
HL
HEM3
LCD Panel
TCON
▲
▲
SERVICE BULLETIN
SOFTWARE UPDATE
WLAN
BLUE Triangle: (Secondary) Possible defective part
5. Chart Color Code
RED DOT: (Primary) Most likely defective part
Video
Protection Modes
4. Follow the associated flowcharts in the Training Manual to isolate the board.
Board Reference
* Immediate Shutdown After Power ON & 7X
*NOTE: REFER TO LCD PANEL SERVICE MANUAL IN REFERENCE
LIBRARY DATABASE FOR CORRECT REPLACEMENT PARTS BASED
ON SERIAL NUMBER.
KDL-46HX855/55HX855 10
SECTION 3 - FLOW CHARTS AND DIAGRAMS
BLOCK DIAGRAM
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
RF
HDMI 1
PC HD15
SWITCH
UNIT
LED
IR RX
LIGHT SENSE
LCD PANEL
HFR
TCON
BAPS
HL
L
R
ANALOG AUDIO
OUT
OPTICAL
AUDIO OUT
HDMI 3
IC4601
AMP
IC5500
HDMI
SWITCH
EQ
TUNER
ETHERNET
USB2.0
HDMI 2
HDMI 4
LVDS
AC IN
IR
TRANSMITTER
HEM3
WIRELESS
LAN CARD
IC9000
A/V
DECODER
VIDEO
PROCESS
USB2.0
USB HUB
LED BACKLIGHTS
POWER SUPPLY/
CONVERTER
G7 (55")
G6 (46")
L
R
IC4701
SUB-
WOOFER
AMP
LED BACKLIGHT
LOCAL DIMMING
LD
OVERALL BLOCK DIAGRAM
KDL-46HX855/55HX855 11
SECTION 3 - FLOW CHARTS AND DIAGRAMS
NO POWER
VLED_VCC
GL_CTL
VLED_GND
LD_ERR
1~4
6~9
11
13
DC_DIMMER
BLINKING
PWM_DIMMER
BL_ERR
1
2
3
4
BL_ON
GND
DIGITAL_STBY
AU_GND
5
6
7, 8
9~12
REG12V
TCON_ON
AU_12V
STBY3.3V
13,14
17, 18
19
CN6801
CN6401
TCON_VCC
AUDIO_GND
AU_12V
REG12V
1
2, 4
3, 5
12, 8
AUDIO_12V
STBY3.3V
7, 9
10
BLINKING
DIGITAL_STBY
POWER_ON
PWM_DIMMER
DC_DIMMER
CN6001
BAPS
G7 (55")
LED_ON
14
AC_OFF_DET
POWER_ON
26
27
28
23
TCON_VCC
12
13
14
15
16
17
18
19
20
BL_ON
BL_ERR
AC_OFF_DET
TCON_ON
G6 (46")
LD
TO LED
BACKLIGHTS
POWER AND CONTROL BLOCK DIAGRAM
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