Read Sony KDL-70W856B Service Manual online
KDL-70W856B 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
POWER SUPPLY BOARD
LD BOARD
LD
G2B
MAIN BOARD
BAXL
12
30
GND
11
29
GND
3
28
BL_ERR
5
27
BL_ON
10
25
GND
9
24
GND
8
23
GND
7
22
GND
17
21
+19.5V(12V)
16
20
+19.5V(12V)
15
19
+19.5V_SS(12V)
14
18
+19.5V_HOLD(12V)
13
17
REG+12V
23
14
STBY+3.3V
27
12
AC_OFF_DET
28
11
POWER_ON
10
16
GND
9
15
GND
4
8
IP_REF
7
7
FB_REF
6
5
LD_PWM_3/SPI0_3(CLKF)
5
4
LD_PWM_2/SPI0_2(DATAF)
3
3
LD_PWM_1/SPI0_1(LATF)
2
2
LD_PWM_0/SPI0_0(EMIT IN)
NC
26
DIGITAL_STBY
NC
13
TCON_ON
NC
10
SA_MODE
NC
9
LD_STBY
NC
6
LD_PWR_4/SPI0_RDATA/BLU_TEMP
NC
1
LD_MODE_SW
GND
10
16
GND
9
15
FB_REF
7
7
LD_PWM_3
6
5
LD_PWM_2
5
4
IP_REF
4
8
LD_PWM_1
3
3
LD_PWD_0
2
2
LD_STDBY
8
NC
SA_MODE
1
NC
1
14
VLED_VCC
2
13
VLED_VCC
3
12
VLED_VCC
4
11
VLED_VCC
6
9
VLED_GND
7
8
VLED_GND
8
7
VLED_GND
9
6
VLED_GND
10
5
VLED_GND
11
4
LD_ERR
12
3
GL_CTRL
14
1
SET_12V
NC
10
NC
NC
2
NC
CN2002
CN2001
CN9101
CN6401
POWER_ON
28
11
STBY3.3V
23
14
REG12V
17
21
REG12V
16
20
REG12V
15
19
REG12V
14
18
REG12V
13
17
GND
12
30
GND
11
29
GND
10
25
GND
9
24
GND
8
23
GND
7
22
BL ON
5
27
BL_ERR
3
28
T-CON_ON
26
NC
NC
25
NC
GND
24
NC
GND
22
NC
GND
21
NC
T-CON_VCC12V
20
NC
T-CON_Vcc12V
19
NC
REG12V
18
NC
DIGITAL_STBY
6
NC
BLINKING
4
NC
PWM_DIMMER
2
NC
DC_DIMMER
1
NC
CN6601
VLED_VCC
1
14
VLED_VCC
2
13
VLED_VCC
3
12
VLED_VCC
4
11
VLED_GND
6
9
VLED_GND
7
8
VLED_GND
8
7
VLED_GND
9
6
SIGNAL_GND
10
5
LD_ERR
11
4
GL_CTRL
12
3
REG12V
14
1
NC
5
NC
NC
13
NC
AC_IN
1
AC-N
2
AC-L
AC_OFF_DET
27
12
CN6101
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