54
6.
Block Diagrams, Test Point Overview, and Waveforms
Block Diagram Main Display Supply (42”)
HIGH VOLTAGE INVERTOT
A2
DC-DC
A
3
S
TANDBY, MAIN
S
FILTER, PFC+AUX
A1
1
2
4
1M09
3
7101
NCP1606BDG
8
CONTROLLER
VCC
DRV
FB
7
1
5002
7165
T
S
24
3
1
+160V
MAIN DI
S
PLAY
S
UPPLY
+24V
2120
I_17661_020.ep
s
17040
8
1M95
3
7
1
5
7214
TCET1102
4
2
7202
TCET1102
4
3
6
10
9
11
8
K
A
R
K
A
R
3
162
3
16
8
B01B
TO 1M95
SS
B
3
4
2
6
5
16
15
11
12
14
10
9
+V
S
ND
-V
S
ND
1
2
3
4
5
1T90
1M90
6
TO 1M90
AMBI-L
AL
3
1
2
3
4
5
1M59
1T60
1T59
6
7
TO 1M59
SS
B
B06A
7210
7211
7201
UBA2071AT
S
16
CONTROLLER
VDD
GH
24
GL
1
8
3
215
S
H
22
3
205
VFB
3
PWMD
1
3
EN
15
IFB
1
3
207
3
272
5202
6
5
4
3
2
1
2247
1
2
1P16
3
TO
BACK LIGHT
S
1
2
1P19
3
TO
BACK LIGHT
S
620
8
620
3
3
240
222
3
7220
6215
3
265
2244
1M99
3
5
8
4
6
7
2
1
B01B
TO 1M99
SS
B
+12V
3
206
720
3
721
3
BOO
S
T
DIM
L
a
mp on/off
N.C.
+12V
3
22
3
3
221
3
242
6210
3
2
3
6
7212
33
24
en
ab
le
3
2
3
5
+160V
6120
1140
T
3
.5AH/125V
1141
T
3
.5AH/125V
6117
6115
7105
TCET1102
6105
7102
3
121
5102
210
8
7402
3
40
8
5401
+12V
+12V
+
3
V
3
-
S
TANDBY
6124
5002
1
5
7
6
3
104
3
109
3
105
S
TANDBY
S
_
S
CL
S
_
S
DA
I2C-
S
EL1
I2C-
S
EL2
+12V
+V
S
ND
-V
S
ND
+
3
V
3
-
S
TANDBY
+
3
V
3
GND-
S
ND
3
10
8
3
10
8
C
S
4
3
111
3
11
8
GND
6
61
3
0
612
3
2165
3
11
8
61
3
2
6122
7104
TCET1102
3
1
8
5
S
TANDBY
S
TANDBY
OVER VOLTAGE
PROTECTION
6104
610
3
2127
2120
CONTROL
5
ZCD|
S
TDDWN
CONTROL
6141
211
3
3
1
3
9
LOW POWER O
S
CILLATOR
+
HIGH EFFICIENCY DRIVER
2166
N.C.
TO 1M59
AMBI-L
AL
3
HOT GROUND
COLD GROUND
HOT GROUND
COLD GROUND
3
224
3
225
2246
3
27
3
22
3
6 22
3
1
2217
+12V
6101
T
S
6B
-
+
1110
T2.5AH/250V
1
3
0
8
5101
510
3
MAIN
S
FILTER
2
1
GNDHOT2
GNDHOT1
GNDHOT1
6150
GNDHOT2
GNDHOT2
GNDHOT2
GNDHOT2
3
121
210
8
GNDHOT1
GNDHOT1
3
1
3
4
61
3
6
61
38
61
3
7
3
11
8
21
3
0
GNDHOT1
10
17
S
GND
PGND
+160V
+12V