Haier HL22XLT2 Service Manual page 53

C933
470NF 25V
C934
100N 50V
+2.5V
Sense the lowest output voltage
of RT8326 and then control RT8452
boost Vout.
D907 D908 D909 D910 D911 D912 D913 D914
1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148
R942
24K +-5% 1/8W
LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8
R948
20K +-5% 1/8W R950
R986 NC
NC
D915 D916 D917 D918 D919 D920 D921 D922
1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148
LED9 LED10 LED11 LED12 LED13 LED14 LED15 LED16
LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8 LED9 LED10 LED11 LED12
D923 D924 D925 D926 D927 D928 D929 D930 D931 D932 D933 D934
1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148
ZD901
MTZJ T-72 15B
ON/OFF
R971
100KOHM +-5% 1/8W
R981
Q931 10KOHM +-5% 1/8W
2N3904
R984
10KOHM +-5% 1/8W R985
100KOHM +-5% 1/8W C941
100N 50V
IC904
RT8482GS
1 16
GBIAS GND
GATE VCC
2 15
GATE VCC
3 14 OVP
NC OVP
SS ISW 4 13
ISW EN
5 12
NC NC
ISP SS
6 11
ISP SS
ISN 7 10
ISN DCTL
VC 8 9 ACTL
VC ACTL
R932
6.2K 1/8W
R931
ON/OFF
1K 1/8W
C938 C937
3N3 25V 100N 50V ISP
R935
10KOHM +-5% 1/8W ISN
10KOHM +-5% 1/8W
ON/OFF
R943
330 OHM +-1% 1/8W R944
0R051/8W
R946
NC R947
DIM
1K 1/8W
R945
R951 14.3K 1/8W 1%
1.2K 1% C940
ACTL
3N9 50V
R952
10K 1/8W 1%
Q914
SST2222A
Compensation circuit
LED13 LED14 LED15 LED16
D935 D936 D937 D938
1N4148 1N4148 1N4148 1N4148
Short LED protector
+12V
C927 L904
100N 50V + + C929
100UH
C928 47UF 35V
330UF 35V D906
B360B
1 2 1 2
FB901
BEAD
C931 C932
120UF 63V + + 120UF 63V
Q902
AO4438 C935
100V 0.1UF Z Y 5V
R933
GATE
ISW
4R7 +-5% 1/8W
R936
1K 1/8W R939
C939 0.05R
1N 50V
+5.2V
R940
1K 1/8W 1%
R941
Q903
2N3904
Q904
2N3904
IC905
KIA431A-A T /P
+2.5V
Q913
2N3904 R949
75R 1/8W 1%
Q915
2N3904 R961
+5.2V
10KOHM +-5% 1/8W
R962 Q917
DIM
10ohm +/-1% 1/8W 2N3904
R963
1KOHM +-5% 1/8W
R980
10KOHM +-5% 1/8W
54
42.9V
R987
JUMPER
ISP
R927 R928 R929
20K 1/4W 20K 1/4W 20K 1/4W
R930
C936
100OHM +-5% 1/8W
470NF 25V
ISN
R934
36K 1/8W 1%
OVP
R937
1K 1/8W 1%
DC/DC Converter
8-Strings for one Light
LED1 LED2 LED3 LED4 LED5 LED6
Q905 Q906 Q907 Q908 Q909
2N3904 2N3904 2N3904 2N3904 2N3904
Q916 R953 R954 R955 R956 R957
2N3904
10ohm +/-1% 1/8W
LED9 LED10 LED11 LED12 LED13 LED14
Q920 Q921 Q922 Q923 Q924
2N3904 2N3904 2N3904 2N3904 2N3904
R972 R973 R974 R975 R976
10ohm +/-1% 1/8W
LED7 LED8
Q910 Q911 Q912
2N3904 2N3904 2N3904
R958 R959 R960
LED15 LED16
Q925 Q926 Q927
2N3904 2N3904 2N3904
R977 R978 R979