Sharp XL-DH20NH Service Manual page 26

XL-DH20NH
POWER / AMPLIFIER PWB-B
A
B
C
D
E
When Servicing, pay attention as the
area enclosed by this line(
F
is directly connected with AC main
voltage.
G
H
1
HV300V
BR201
KDL460 +
EC201
100uF/400V
AC1 AC2
CX202
!
0.22uF/275V
CY201 CY202
R29 R32
1M/SMD
1M/SMD
102P/250V 102P/250V
3 1
3
1
LF201
UF16/35mH
!
4 2
4 2
0.22uF/275V
CX201
R201 R202
1M/SMD 1M/SMD
3 1
3 1
LF202
EE25/45mH
!
4 2
4
2
TVR1
2
1
1 2
14471
RT1
F201 5D-9
!
T2.5A L250V
EC203
2.2uF/50V
L N
CN302
AC IN
)
2 3
Figure 5-11: POWER / AMPLIFIER SCHEMATIC DIAGRAM (1/2)
R205 C201
100K/1W 102P/1KV
R204
D205
10K
FR107
U201
FB201 FB
Drain
6
Drain
4 7
nc
D206
Drain
8
FR107
PWM
R1
NC
3
Vfb
GND 1
DM311
R207
4.7R
VCC
D208
FR107
C202 + EC202 +
ZD203
EC214
47uF/50V
0.1uF 47uF/50V
15V(NC)
!
R208
0R
C203 ZD2
R209 333P 5.1V/NC
27K
HV300V
R210
100K/1W
D207
U202 FR107
7M0880
1
Drain
FB202
3
VCC
FB
PWM
C331
100P/1KV
5
Start
2
GND
+
C205
0.1uF
ZD207
3V3
C232
473P
ZD205
15V/NC
C221
0.1uF
!
Q5
2SC8550
3 1
Vce=50v
Ice=500mA
2
E213
R28
100K
560
ZD208
22V/NC
4
5 – 14
!
T201
D209
2
2
EEL19 FR107
10
10
EC205
220uF/35V
D210
1
1
9
FR107
9
R221
R31
D211
3
3
8 FR107
8
11
11
D212
4
4
FR107
7
7
470uF/25V
12
12
5
5
13
1000uF/16V
13
D214
6
6
SR360
R248
CY203 C222
102P/
102P/1KV
5R1/SMD
250V
R326
330R
4 1
4 1
R327
3
1K
2
3 2
C213
U204
0.1uF
PC817
!
3
T202
EI33 U203
TL431
1
1
C204
D215A/B UF5404X2
103P/1KV
13
13
R241 C215
2
47/SMD
2
R27
102P/1KV
12
47/SMD
12
EC217
2200uF/35V
3 11
3 11
EC219
2200uF/35V
R30
C218
47/SMD
R242
47/SMD
!
102P/1KV
9
9
D216A/B
UF5404X2
ZD4
R243
18V
1K
U206
PC817
R244
4 1
4 1
10K
C221 R246
3 2
3 2
0.1uF 10K
3
CY1 U205
TL431
102P/250V
R212
4.7R
VCC
+
EC204 ZD206
47uF/50V 22V
U207
PC817
4 1
1
4
2
3
2
3
!
5
FA
Q201
8050 FA
1 3
R217
Q20
10K
3
R235 855
10K
R219
10K
C223
2
0.1uF
FB
FB
2K/SMD
-VEE
ZD201
2K/SMD
12V/1W
R330 5.1R/SMD
1
8
Q
C208
EC206
EC207
47K
220uF/35V
220uF/35V
L203
+ 100uH/1A + C210
EC209 C229 EC210
0.1uF
0.1uF 470uF/25V
EC212 C211 EC213 C21
0.1uF L204 1000uF/16V 0.1u
5VB
20uH/2A
R26
10K
R238
10K
R239
1K
R240
10K
-VCC
L206
20uH/2.5A
C216 EC218
C4
0.1uF 2200uF/35V
0.1uF
C219
EC220 C5
0.1uF
2200uF/35V 0.1uF
+VCC
L205
20uH/2.5A
+VCC
R245
68K
R247
4.7K
-VCC
R23
5VB
330
R216
10K
Q221
8050
2
Q220
8050 R215
2K
2
STY
R214
10K
6