Power Supply Board Failure Check - Haier L32F6 Service Manual

Service Manual
Model No.:
L32/42F6

9-2. Power Supply Board Failure Check.

State:No picture
First,check cables which connect with PSU,then check as follows
Check input voltage
voltage: +5VSB----POWER ON(2.6V) -----+12V
TJC3-7A
PW_ON/OFF-INV
1
2
3
4
5
6
7
CNA1
PWR-ON/OFF-GPIO46
State:No sound
First,check cables which connect with PSU,then check as follows
1) Check input voltage as NO picture
2) Check speaker output
speaker.
AMP_LIN R92
R102
MUTE_TDA8932
AMP_RIN R140
R129
5VMst
+12V
+3.3VDD
R225 R215
10K NC
R213
33K
VCC-AU
R107
10R C81
0.1u
1
VSSD/HW VSSD/HW
22K C91 470n
R127 C106 2
IN1P
22K
22K C92 470n 330p 3
IN1N
4
DIAG
A1
R120 5
ENGAGE
47K
TDA8932BTW/33BTW
6
POWERUP
R123 7
CGND
12K
8
VDDA
9
VSSA
0.1u C112 10
OSCREF
R180 39K
11
HVPREF
C109 C108 12
INREF
CA18
47uF/16V 0.1u 0.1u 13
NC
22K C93 470n
R128 C107 14
IN2N
22K
22K C96 470n 330p 15
IN2P
16
VSSD/HW VSSD/HW
5VMst
R212
2.2K
R214
PW-ON/OFF-INV
100R
PWR_ON/OFF
V203
3904
C209
0.1uF
L31
L1
CA84 CA81
470u/35V 470u/35V
C100 C95
0.1u 0.1u
32
31 C146
OSCIO
30 0.1u
HVP1
29
VDDP1
28 C118
BOOT1
L34 47uh
4 5
AMP-Lout+ AMP-Lout+ AMP-Lout+ AMP-Lout+ AMP-Lout+
27 15n 2 1
OUT1
R220 C129
26
VSSP1
10R 47n
C123
25 R251 82R
STAB1
470P
24
STAB2
C121
23 0.1u
VSSP2
L36 47uh
4 5
22 C117 2 1 AMP-Rout-
OUT2
R293 C159
21 15n
BOOT2
10R 47n
C151
20 R253 82R
VDDP2
470P
AMP-Rout+
19
HVP2
CA85
18
1000u/25V
DREF
17 C116 C161
0.1u 0.1u
PW_ON/OFF-INV
AMP-Lout-
CA83
1000u/25V
C140
330n
CNC2
AMP-Lout+
C160 1
AMP-Lout-
2
330n
AMP-Rout- 3
AMP-Rout+
4
CON4-2.5MM
57