Sony KDL-55W805A Service Manual ▷ View online
KDL-55W805A 5
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.
1. Confirm the symptom from the customer.
Red Dot: (Primary) Most likely defective part.
2. Select that symptom from the chart.
Blue Triangle: (Secondary) Possible defective part.
3. Bring the primary component listed for that symptom.
5. Chart Color Code.
LAN Power
Audio
2X 3X 4X 5X 6X 7X 8X No
WIFI
Dead set
No
Video
Whole
Screen
Distortion
Isolated
Area
Distortion
No Audio
MAIN BOARD
*
▲ ▲
▲
▲
POWER SUPPLY
LCD Panel
TCON
▲
▲
SERVICE BULLETIN
▲
SOFWARE UPDATE
WLAN
Video
Protection Modes
4. Follow the associated flowcharts in the Training Manual to isolate the board.
Board
* 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-55W805A 6
SECTION 2 - TROUBLESHOOTING
FLOWCHARTS AND DIAGRAMS
OVERALL BLOCK DIAGRAM
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
RF
HDMI 1
PC HD15
SWITCH
UNIT
LCD PANEL
HFR
TCON
BA2S
L
R
HEAD PHONES
OUT
OPTICAL
AUDIO OUT
HDMI 3
IC4601
AMP
IC5500
HDMI
SWITCH
EQ
TUNER
ETHERNET
USB 1
HDMI 2
HDMI 4
LVDS
AC IN
IC9000
A/V
DECODER
VIDEO
PROCESS
USB 2
LED BACKLIGHTS
POWER SUPPLY /
CONVERTER
GL2E
HSC
BLUETOOTH
BT
WIFI
IR RX
LED’S
HIR
SMART
CORE
USB 3
MAIN BOARD
KDL-55W805A 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
+OUT1
+OUT4
+OUT2
+OUT3
1
2
3
4
2
3
4
DC_DIMMER
PWM DMMER
BL_ERR
1
3
2
BL_ON
GND
5
14~17
REG12V
STBY3.3V
18, 20
21, 22
21, 22
CN6802
CN6401
CN6001
BA2S
GL2E
-OUT1
-OUT4
-OUT2
-OUT3
1
2
3
4
2
3
4
CN6803
AC_OFF_DET
POWER_ON
27
28
28
23
GND
1
3
5
5
10~12
18, 20
18, 20
21
27
28
28
23
DC_DIMMER
BL_ERR
BL_ON
GND
REG12V
STBY3.3V
AC_OFF_DET
POWER_ON
GND
PWM DIMMER
2
LCD PANEL, TCON
&
LED BACKLIGHTS
POWER SUPPLY
MAIN BOARD
KDL-55W805A 8
SECTION 2 - TROUBLESHOOTING
NO POWER FLOWCHART
No Power
Is standby LED
blinking?
No
Yes
No
See protection
flowchart
Yes
Does red standby
LED on front panel
light?
High (>2.5V)
on Pin 27 of CN6401
on Power Supply?
Yes
No
Main Board*
High (3.3V)
appears
momentarily?
Yes
No
Power Supply
Board*
Power Supply
Board*
Remove AC power and
wait at least 30
seconds before
reapplying.
Power Supply
Board*
Press power button while
monitoring Pin 28
of CN6205 on
Power Supply Board.
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 19
.
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