Haier LT19Z6 Service Manual page 74

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
NC 1N4148 NC NC NC 1N4148 NC NC
R942
2K4 +/-1% 1/8W
LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8
R948
10K OHM +-5% 1/8W R950
R986 10K OHM +-5% 1/8W
3K9 1/8W 5%
D915 D916 D917 D918 D919 D920 D921 D922
NC NC NC 1N4148 NC 1N4148 NC NC
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
NC 1N4148 NC NC NC 1N4148 NC NC NC NC NC 1N4148
ZD901
MTZJ T-72 15B
ON/OFF
R971
100KOHM +-5% 1/8W
R981
Q918 10KOHM +-5% 1/8W
2N3904
R984
10KOHM +-5% 1/8W R985
100KOHM +-5% 1/8W C941
100N 50V
C927
IC904 100N 50V
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
150K 1/8W 5%
C938 C937
4N7 50V 100N 50V ISP
R935
10KOHM +-5% 1/8W ISN
10KOHM +-5% 1/8W
ON/OFF
R943
330 OHM +-1% 1/8W R944
NC
R946
10K 1/4W
DIM R947
R945
10K OHM +-5% 1/8W
R951 12K 1/8W 1%
1.2K 1% C940
ACTL
NC
R952
12K 1/8W 1%
Q914
SST2222A
Compensation circuit
LED13 LED14 LED15 LED16
D935 D936 D937 D938
NC 1N4148 NC NC
Short LED protector
+16V
L904
+ + C929
100UH
C928 47UF 35V
330UF 35V D906
1 2 1 2
FB901
BEAD B3100B C932
Q902 C931 82UF 100V
AO4454L + +
R933 C935 82UF 100V
GATE
100V 0.1UF Z Y 5V
4R7 +-5% 1/8W
ISW
R936
1K 1/8W R939
C939 0.05R
1N 50V
+5.2V
R940
1K 1/8W 1%
R941
Q903
2N3904
Q904
2N3904
IC905
KIA431A-AT /P
+2.5V
Q913
2N3904 R949
75R 1/8W 1%
Q915
2N3904 R961
+5.2V
NC
R963
R962 Q917
DIM
10ohm +/-1% 1/8W NC
NC
R980
NC
74
60V
R987
13K 1/6W
ISP
R927 R928 R929 CN906
NC NC NC
R930
C936 1
150 OHM 1/8W
2
NC
ISN 3
4
5
R934 6
36K 1/8W 1%
OVP CONN
R937
1K 1/8W 1%
CN905
1
2
3
4
DC/DC Converter NC
8-Strings for one Light
LED1 LED2 LED3 LED4 LED5 LED6
R9101 R9102 R9103 R9104 R9105
0R01 1/10W 0R01 1/10W NC NC NC
Q905 Q906 Q907 Q908 Q909
2N3904 2N3904 NC 2N3904 NC
Q916 R953 R954 R955 R956 R957
NC
10ohm +/-1% 1/8W
LED9 LED10 LED11 LED12 LED13 LED14
R9108 R9109 R9110 R9111 R9112
0R01 1/10W 0R01 1/10W NC NC NC
Q920 Q921 Q922 Q923 Q924
2N3904 2N3904 NC 2N3904 NC
R972 R973 R974 R975 R976
10ohm +/-1% 1/8W
LED14
LED12
60V
60V
LED6
LED2
LED14
LED2
60V
LED7 LED8
R9106 R9107
0R01 1/10W 0R01 1/10W
Q910 Q911 Q912
2N3904 2N3904 2N3904
R958 R959 R960
LED15 LED16
R9113 R9114
0R01 1/10W 0R01 1/10W
Q925 Q926 Q927
2N3904 2N3904 2N3904
R977 R978 R979