Power Supply Board Failure Check - Haier HL32XSL2 Service Manual

Service Manual
Model No.: HL32XSL2

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
+12V CN10 Power
1
1
3
3
5VSTB 5
5
7
7
9
9
11
11
+3.3VDD
PWR_ON/OFF
R225 NC/10K
PWR-ON/OFF-GPIO46
First,check cables which connect with PSU,then check as follows
1) Check input voltage as NO picture
2) Check speaker output
First,check speaker anode(+) and cathode(-),confirm speaker short or not.If short ,replace
speaker.
Second,check CN27 with oscillograph,confirm wave output or not.
C133
NC
I2S_MCLK
R349 22
2 I2S_MCLK
I2S_SCLK
R346 22
2 I2S_SCLK
I2S_LRCLK
R334 22
2 I2S_LRCLK
I2S_SD0
R332 22
2 I2S_SD0
1,2,9,14 M_SCL
1,2,9,14 M_SDA
HP_MUTE_AMP
C116 100pF
C146 4.7nF
L76
+3.3AVDD
R306
RST_AMP
2 RST_AMP
50
+12V
2
2
4
4
6
6
8 R350
8
10 R341
10
12
12
R232
10K
R215 10K
C209
R213 0.1uF
NC/10K
L31
+12V
600(4.5X3.2)
CA84 470uF/35V
C140 1uF C118 1uF
C131 0.1uF C100 0.1uF
U54
C134 C135 C136
NC NC NC
27
XTI
28
BICKI
29
LRCKI
30 STA559BW
SDI
R335 22 34
SCL
R338 22 33
SDA
R363 NC/0R 23
PDN
R253 2.2K 25
PLL_FILTER
C117 680pF
26
PLL_GND
FB/2A
C255 100nF 5
VCC_REG
4
VSS
C161 100nF 15
VDD
14
GND_REG
10K 32
INT_LINE
R329 100 31
RST
C254
2.2uF
PB-ADJUST
100
PW_ON/OFF-INV
100
PB-ON/OFF
5VSTB
R212
2.2K
R214
PW_ON/OFF-INV
100
V203
3904
+3.3AVDD +3.3AVDD
R107 3.3R L74 FB/2A
C106 10uF C107 10uF
C78 0.1uF
C160 0.1uF C79 0.1uF
L33
13
OUT1A
C240 330pF/25V
R364 22
L34
10
OUT1B
L35
9
OUT2A
C281 330pF/25V
R360 22
L36
6
OUT2B
18 OUT3A
OUT3A/DDX3A
OUT3B
17
OUT3B/DDX3B
TW
20
TWARN/OUT4A
EAPD
19
EAPD/OUT4B
State:No sound
CN27
Speaker
AMP-Lout+
1
AMP-Lout- 2
AMP-Rout-
3
AMP-Rout+
4
22uH
AMP-Rout+
R494 12
C244 R362 12
100nF/25V C291 100nF/25V
C262 100nF/25V
C258 R558 12
22uH 100nF/25V R534 12
AMP-Rout-
22uH
AMP-Lout+
R493 12
C282 R359 12
100nF/25V C286 100nF/25V
C284 100nF/25V
C283 R492 12
22uH 100nF/25V R554 12
AMP-Lout-
C121
470nF
C123
470nF