Read Sony XBR-55X900B Service Manual online
XBR-55X900B 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
CN6401
CN9700
NC
1
NC
28
1 POWER_ON
DIGITAL_STBY
2
18
27
2 AC_OFF_DET
BL_ERR
3
20
26
3 TCON_ON
NC
4
NC
25
4 STBY+3.3V
BL_ON
5
19
20
5 T_CON_VCC12V
GND
6
4
17
6 REG+12V
GND
7
5
16
7 REG+12V
GND
8
6
15
8 REG+12V
GND
9
14
NC
9 LDOSLAT
GND
10
13
NC
10 LDOGEMIT
GND
11
12
NC
11 LD_STBY
12
1
REG12V
12
1
11
12 GND
13
2
REG12V
13
2
10
13 GND
14
3
REG12V
14
3
9
14 GND
6
4
REG12V
15
8
NC
15 LDOSCLK
7
5
REG12V
16
7
NC
16 LDOSWDATA
8
6
REG12V
17
6
NC
17 GND_LD
T-CON_VCC12V
18
4
2
18 DIGITAL_STBY
T-CON_VCC12V
19
5
5
19 BL_ON
T-CON_VCC12V
20
5
3
20 BL_ERR
T-CON_VCC12V
21
NC
T-CON_GND
22
1
T-CON_GND
23
2
TCON
T-CON_GND
24
NC
22
1 GND
STBY_3.3V
25
4
23
2 GND
T-CON_ON
26
3
NC
3 NC
AC_OFF_DET
27
2
18
4 PWR Power V 12 IN
POWER_ON
28
1
19
5 PWR Power V 12 IN
CN2002
VLED_VCC
1
14
14
1 SET_12V
VLED_VCC
2
13
NC
2 SA_REF_L
VLED_VCC
3
12
12
3 GL_CTRL
VLED_VCC
4
11
11
4 LD_ERR
NC
5
NC
10
5 VLED_GND
VLED_GND
6
9
9
6 VLED_GND
VLED_GND
7
8
8
7 VLED_GND
VLED_GND
8
7
7
8 VLED_GND
VLED_GND
9
6
6
9 VLED_GND
SENSE_GND
10
5
NC
10 SA_REF_H
LD_ERR
11
4
4
11 VLED_VCC
GL_CTRL
12
3
3
12 VLED_VCC
NC
13
NC
2
13 VLED_VCC
REG12V
14
1
1
14 VLED_VCC
CN6101
G7A
1 AC-N
2 AC-L
CN4561
PVDD(AU)
PVDD(AU)
PVDD(AU)
GND
GND
GND(AU)
PVDD(AU)
PVDD(AU)
GND
GND
GND(AU)
AC_IN
POWER SUPPLY
MAIN BOARD
K BOARD
CN6601
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