DOWNLOAD Sony KDL-50R550A / KDL-60R520A / KDL-60R550A / KDL-70R550A Service Manual ↓ Size: 4.15 MB | Pages: 36 in PDF or view online for FREE

Model
KDL-50R550A KDL-60R520A KDL-60R550A KDL-70R550A
Pages
36
Size
4.15 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kdl-50r550a-kdl-60r520a-kdl-60r550a-kdl-70r550a.pdf
Date
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Sony KDL-50R550A / KDL-60R520A / KDL-60R550A / KDL-70R550A Service Manual ▷ View online

KDL-50R550A/60R520A/60R550A/70R550A 9
SECTION 2 - TROUBLESHOOTING
KDL-60R520A/60R550A/70R550A
STBY3.3V
AUDIO_12V GND
AC_OFF_DET
POWER_ON 
1
2
3
4, 5
BL_ERR
REG12V_GND
AUDIO_12V
6, 7
8
12
BL_ON
PWM_DIMMER
N/C
13
14
15
AC IN (N)
AC IN (H)
1
2
CN2
A
REG 12V
GND
AUDIO_12V
2, 7
6
BL_ERR
1
12
CN201
TCON_12V
AC_OFF_DET
13
14
BL_ON
3, 8
STBY 3.3V
POWER_ON
4
GE70 (70”)
CN1
LCD PANEL, TCON
&
LED BACKLIGHTS
7
9
11
LED1 +
1
3
5
CN3
POWER SUPPLY
MAIN BOARD
REG_12V
9~11
5
BL PWM
GND
9, 11
10
13
15
LED1 -
LED2 +
LED2 -
LED3 +
LED3 -
LED4 +
LED4 -
GE60 (60”)
KDL-50R550A/60R520A/60R550A/70R550A 10
SECTION 2 - TROUBLESHOOTING
 
*For Part Number information, refer to 
“Section 4 - Exploded View/Part Number Information” on page 23
.
NO POWER FLOWCHART
No Power
Is standby LED 
blinking?
No
Yes
No
See protection 
flowchart
Yes
Does red standby 
LED on front panel 
light steady?
High (3.3V)
on Pin 3?
Yes
No
Main Board*
High (3.3V)
on Pin 6?
Yes
No
Unplug TV from 
AC power. Wait at 
least 20 seconds 
and re-apply AC 
power.
Press power 
button while 
monitoring Pin 3 of 
CN2 on Power 
Supply Board.
High (3.3V) on
Pin 3?
High (3.3V) on
Pin 2?
Yes
No
Power Supply 
Board*
Power Supply 
Board*
Yes
Power Supply 
Board*
Power Supply 
Board*
Main Board*
Power Supply 
Board*
50"?
Yes
No
Press power 
button while 
monitoring Pin 3 of 
CN6401 on Power 
Supply Board.
No
KDL-50R550A/60R520A/60R550A/70R550A 11
SECTION 2 - TROUBLESHOOTING
 
*For Part Number information, refer to 
“Section 4 - Exploded View/Part Number Information” on page 23
.
STANDBY LED BLINKING FLOWCHART
Protect 
Shutdown. 
Standby LED 
Blinking
No
Yes
No
Yes
2X
Main Board*
3X
5X
No
Yes
LCD Panel*
6X
Yes
Power Supply 
Board*
“SONY” logo 
appears before 
shutdown?
Yes
No
LCD Panel*
Power Supply 
Board*
KDL-50R550A/60R520A/60R550A/70R550A 12
SECTION 2 - TROUBLESHOOTING
NO VIDEO FLOWCHART
No Video
Backlights 
turned on?
Unplug LVDS 
connector at 
TCON while unit 
is running. This 
may need to be 
done more than 
once.
Any flashes 
seen on 
screen?
Yes
No
Any OSD 
graphics 
present?
No
Main Board*
No
LCD Panel*
Yes
Yes
Main Board*
LCD Panel* 
 
*For Part Number information, refer to 
“Section 4 - Exploded View/Part Number Information” on page 12
.
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