Power Stage - Sharp LC-22LE240E Service Manual

LC-22LE240

4. POWER STAGE

The DC voltages required at various parts of the chassis and panel are provided by a
main power supply unit. MB62 chassis can operate with IPS60, IPS16, IPS17, PW26,
PW27 as main power supply and also with 12V adaptor.
CN706 is used for IPS60, IPS16 and IPS17 and CN1 is used for PW26 and PW27.
JK9 is used for the adapter option and also CN705 inverter socket or DB32 chassis with
CN706 is used to supply backlight.
The power supplies generate 18V, 12V, 5V, 3,3V and 12V, 5V, stand by mode DC
voltages. Power stage which is on-chassis generates 5V, 3V3 stand by voltage and 12V,
8V, 5V, 3V3, 2.5V, 1,8V and 1,2V supplies for other different parts of the chassis. Chassis
block diagram is indicated below.
60R
C1081
10uF
6V3
F271
A
3V3_STBY
60R
C1030
10uF
6V3
F272
1V8_VCC
60R
C990
100nF
22uF
16V
6V3
C1004
F270
3V3_VCC
60R
C1029
10uF
6V3
B
POWER SOCKET
20
3V3_VCC
18
3V3_STBY
16
14
12V_VCC/STBY
C
12
5V_VCC
10
12V_VCC/STBY
8
6
4
2
CN706
D
12V_VCC/STBY
12V_VCC/STBY
E
F
1
C997 C1005 C1070
100nF
100nF 100nF
16V 16V 16V
AVDD_3V3
C1024 C1025 C1022
100nF 100nF 100nF
16V 16V
16V
2V5_VCC
AVDD_DDR
100nF
16V
C1001
VDD_3V3
C1014
100nF
16V
19
3V3_VCC
17
15
VDD_AUDIO_PWR
13
12V_VCC/STBY
11
5V_VCC
5V_STBY
9
DIMMING
7
5 BACKLIGHT_ON/OFF
STBY_ON/OFF
3
S7
1
S8
VDD_AUDIO_PWR
S10
12V_VCC
S19
12V_STBY
S21
12V_VCC
S22
12V_STBY
2
26
60R
C1007
100nF
16V
AVSS_PGA
60R 402 ferrite secilecek
F305
1k
C1028 C1009
10uF 100nF
6V3 16V
F306
1k
C1008
100nF
16V
F307
1k
C1221
100nF
16V
F308
1k
C1222 C1225
100nF 100nF
16V 16V
,17PW80,17PW07
MEGA_DCR_OUT
BACKLIGHT_DIM
S18
MEGA_DCR_IN
NC
3V3_VCC
PANEL_VCC_ON/OFF
3
AVDD2V
C1223
100nF
16V
AVDD2V
C1224
100nF
16V
AVDD2V
AVDD2V
NC
S16
5V_VCC
12V_VCC