DOWNLOAD Sony KDL-39R475A / KDL-42R474A / KDL-42R475A / KDL-46R475A Service Manual ↓ Size: 3 MB | Pages: 30 in PDF or view online for FREE

Model
KDL-39R475A KDL-42R474A KDL-42R475A KDL-46R475A
Pages
30
Size
3 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kdl-39r475a-kdl-42r474a-kdl-42r475a-kdl-46r475a.pdf
Date
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Sony KDL-39R475A / KDL-42R474A / KDL-42R475A / KDL-46R475A Service Manual ▷ View online

KDL-39R475A/42R474A/42R475A/46R475A 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.
Power
Audio
2X     3X    5X     6X   
Dead set
No 
Video             
Whole 
Screen 
Distortion
Isolated 
Area 
Distortion                            
No Audio          
MAIN BOARD
▲
▲
 
POWER SUPPLY
LCD PANEL
TCON
▲
▲
Video                  
Protection Modes
4.  Follow the associated flowcharts in the Training Manual to isolate the board.
Board 
*NOTE: REFER TO LCD PANEL SERVICE MANUAL IN REFERENCE LIBRARY DATABASE 
FOR CORRECT REPLACEMENT PARTS BASED ON SERIAL NUMBER.
KDL-39R475A/42R474A/42R475A/46R475A 6
SECTION 2 - TROUBLESHOOTING
FLOWCHARTS AND DIAGRAMS
OVERALL BLOCK DIAGRAM
COMPONENT/
COMPOSITE
RF
COMPOSITE
HDMI 1
POWER SUPPLY
LED
IR RX
LCD PANEL, TCON 
LED BACKLIGHTS
A
H
L
R
ANALOG AUDIO OUT
OPTICAL AUDIO OUT
MT5366
A/V DECODER
A/V PROCESS
TUNER
USB 
HDMI 2
      LVDS 
ALL MODELS
AC IN
CLASS D 
AUDIO
AMP
G46 (46")
HEADPHONE AUDIO OUT
G42 (39”/42")
MAIN BOARD
&
      LVDS
ONLY 42”/46”
CONTROL
   KEYS
KDL-39R475A/42R474A/42R475A/46R475A 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
AC IN (N)
AC IN (H)
1
2
A
CN901
LCD PANEL, TCON
&
LED BACKLIGHTS
CN8502
G42 (39’’ & 42’’)
MAIN BOARD
POWER SUPPLY
ACD
+18V
+5.2V
PS_ON 
1
2, 3 
4
5, 6
GND
DET
    DIM
DIM
7~9
10 
  
11
12
NC
ON/OFF
ON/OFF
13
14
15 
CN9301 for 42’’ models
CN9101 for 39’’ models 
VLED 
1,12 
3,10
LED1-
1
2, 3 
4
5, 6
7~9
10 
  
11
12
13
14
15 
KDL-39R475A/42R474A/42R475A/46R475A 8
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
AC IN (N)
AC IN (H)
1
2
A
G46 (46")
CN901
LCD PANEL, TCON
&
LED BACKLIGHTS
MAIN BOARD
POWER SUPPLY
ACD
+18V
+5.2V
PS_ON 
1
2, 3 
4
5, 6
GND
DET
    DIM
NC
7~9
10 
  
11
12
NC
ON/OFF
NC
13
14
15 
CN9301 
1
2, 3 
4
5, 6
7~9
10 
  
11
12
13
14
15 
CN701
VLED 
LB1
CN8501
LB2
LB3 
LB4
LB5
LB6
1,12 
3
4
5
8
9
10 
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