Sony KDL-46W705A / KDL-50W705A Service Manual ▷ View online
KDL-46W705A/50W705A 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 PANELS SERVICE MANUAL IN
REFERENCE LIBRARY DATABASE FOR CORRECT
REPLACEMENT PARTS BASED ON SERIAL NUMBER.
KDL-46W705A/50W705A 6
SECTION 2 - TROUBLESHOOTING
FLOWCHARTS AND DIAGRAMS
OVERALL BLOCK DIAGRAM
IR RX
OPTICAL
SENSE
POWER SUPPLY
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
RF
HDMI 1
LCD PANEL
HFR
TCON
L
R
OPTICAL
AUDIO OUT
HDMI 3
TUNER
ETHERNET
HDMI 2
LVDS
AC IN
MAIN BOARD
IC 9001
HDMI
SWITCH
EQ
BA2S
GL2
BLUETOOTH
HSC
HIR
WIFI
SMART CORE
SWITCH UNIT
AND
USB PORT
AMP
HUS
AMP
HP/LINE OUT
HDMI 4
USB
IC 9000
A/V
DECODER
VIDEO
PROCESS
MODULE
KDL-46W705A/50W705A 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
DC_DIMMER
POWER_ON
1
2
3
3
BL_ERR
5
10~12
REG 12V
23
27
27
28
AC IN (N)
AC IN (L)
1
2
2
CN2
BA2S
GND
1
2
4
5, 6
CN9101
11, 13, 14
12
8, 10
16
18
18
GL2
CN1
LCD PANEL, TCON
&
LED BACKLIGHTS
MAIN BOARD
POWER SUPPLY
LED +
1
LED +
2
CN3
LED +
3
LED +
4
LED -
LED -
CN4
LED -
LED -
1
2
2
3
4
4
3
4
4
NC
55
PWM_DIMMER
BL_ON
13~17
21, 22
GND
STBY 3.3V
AC OFF DET
DC_DIMMER
POWER_ON
BL_ERR
REG 12V
PWM_DIMMER
BL_ON
GND (AU)
STBY 3.3V
AC OFF DET
REG 12V (AU)
GND
REG 12V (PANEL)
7, 9
16
18
18
KDL-46W705A/50W705A 8
SECTION 2 - TROUBLESHOOTING
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 18
.
NO POWER FLOWCHART
No Power
Is Standby LED
blinking?
No
Yes
No
See Stanby
LED Blinking
Flowchart
Yes
Does red
Standby LED on
front panel light?
High (>2.5V)
on Pin 27 of CN2
on Power Supply?
Yes
No
Main Board*
Press power button while
monitoring Pin 28
of CN2 on
Power Supply
Board.
High (3.3V)
appears
momentarily?
Yes
No
Power Supply
Board*
Power Supply
Board*
Power Supply
Board*
Remove AC power and
wait at least 30
seconds before
reapplying.
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