Haier L26F6, Руководство по обслуживанию

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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
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
)LUVWFKHFNVSHDNHUDQRGHDQGFDWKRGHFRQ¿UPVSHDNHUVKRUWRUQRW,IVKRUWUHSODFH
speaker.
6HFRQGFKHFN&1ZLWKRVFLOORJUDSKFRQILUPZDYHRXWSXWRUQRW
P_ON/OFF
S TB5 V
DGND
DGND
S TB5 V
PWR_1 2V
DGND
PW_ SAV E_L V 1
C 6
1uF
C 6
1uF
R 2 2 K R 2 2 K
D53
6 . 2V
D53
6 . 2V
R1 100 R1 100
TP55 TP55
Q1
2 N3904
Q1
2 N3904
1
2
3
TP5 6 TP5 6
+
CE11 2
22 0uF/ 2 5 VS
+
CE11 2
22 0uF/ 2 5 VS
R503 4.7 k R503 4.7 k
R4
4.7K
R4
4.7K
CN18
H7- 2 5 A
CN18
H7- 2 5 A
1
1
2
2
3
3
4
4
5
5
6
6
7
7
TP57 TP57
#POWER_ON
Initial Condition:L
H: Power OFF
L: Power ON
R+
A MP-LINN
A MP-LINP
H V P1
H V P 2
V P
V P
V P
A MP-RINP
A MP-RINN
H V P 2
L+
H V P1
MUTE_893 2
DGND
DGND
DGND
DGND
DGND DGND
DGND
DGND
DGND
DGND
DGND
V P A
DGND
DGND
DGND
DGND
DGND
C347&C350
4 ohm:1000nF
8 ohm:470nF
R545
10 R545
10
C431
0.1uF/50 V
C431
0.1uF/50 V
R541
22 R
R541
22 R
CE99 47uF/1 6V CE99 47uF/1 6V
R54 2 39 k R54 2 39 k
C419
0.1uF/50
V
C419
0.1uF/50
V
TP75 TP75
L149 47uH L149 47uH
R59 6
10 k
R59 6
10 k
R54 6
22 K
R54 6
22 K
C4 2 9 0.1uF/50 V C4 2 9 0.1uF/50 V
C434 100pF/50 V C434 100pF/50 V
TP78 TP78
C4 2 8
15nF/50 V
C4 2 8
15nF/50 V
TP7 6 TP7 6
CE98
1000uF/35
V
CE98
1000uF/35
V
R539
10 R539
10
C430
0.1uF/50 V
C430
0.1uF/50 V
C4 2 5 0.1uF/50 V C4 2 5 0.1uF/50 V
C4 2 7 0.1uF/50 V C4 2 7 0.1uF/50 V
C4 2 1
0.1uF/50 V
C4 2 1
0.1uF/50 V
C4 2 4
15nF/50 V
C4 2 4
15nF/50 V
CE97
1000uF/35
V
CE97
1000uF/35
V
C43 2
0.1uF/50 V
C43 2
0.1uF/50 V
C4 2 0
0.1uF/50 V
C4 2 0
0.1uF/50 V
C4 2 3
0.1uF/50 V
C4 2 3
0.1uF/50 V
C433
0.1uF/50 V
C433
0.1uF/50 V
R538
22 K
R538
22 K
R547
22 R
R547
22 R
R544 NC/0R R544 NC/0R
U37
TD A 893 2
U37
TD A 893 2
VSS D/HW1
1
IN1P
2
IN1N
3
DI A G
4
ENG A GE
5
POWER UP
6
CGND
7
V DD A
8
VSSA
9
O S CREF
10
H V PREF
11
INREF
1 2
NC
13
IN 2 N
14
IN 2 P
15
VSS D/HW 2
1 6
VSS D/HW3
17
VSS D/HW4
3 2
DREF
18
H V P 2
19
V DDP 2
2 0
BOOT 2
2 1
OUT 2
22
VSS P 2
2 3
S T A B 2
2 4
S T A B1
2 5
VSS P1
26
OUT1
2 7
BOOT1
2 8
V DDP1
2 9
H V P1
30
O S CIO
31
GND
33
C418 100pF/50 V C418 100pF/50 V
TP77 TP77
CN 26
H_ 2 .5_4
CN 26
H_ 2 .5_4
1
2
3
4
C4 22
330nF/ 6 3 V
C4 22
330nF/ 6 3 V
L150 47uH L150 47uH
C435
330nF/
6 3 V
C435
330nF/
6 3 V
R543 39 k R543 39 k
C4 26 0.1uF/50 V C4 26 0.1uF/50 V
Service Manual
Model No.: /)
59