5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
GND
+12V
+5V
+5VSB
OPWRSB
OPCTRL2
VCCK
BL_ON/OFF
DIMMING
OPWRSB
SW_POWER
+3V3SB
OPWM2
VCCK
Dimming
BL_ON/OFF
SW_POWER
+12V
+5V
+5VSB
12V
12V
+5VSB
GND
3,4,5,6,7,8,9,10,11,12,13
OPWRSB
4
+5V
3,6,8,10,12
+12V
3,10,11,12,13
+5VSB
3,6,9
OPCTRL2
4,6
VCCK
3,4
BL_ON/OFF
12
DIMMING
12
+3V3SB
3,6,9
OPWM2
12
Title
Size
Document Number
Rev
Date:
Sheet
of
MediaTek Inc.
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
Drawn
MT5305A P1V1
V1
C
14
15
Wednesday, October 14, 2009
BACK LIGHT/MAIN POWER
MediaTek Confidential
Title
Size
Document Number
Rev
Date:
Sheet
of
MediaTek Inc.
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
Drawn
MT5305A P1V1
V1
C
14
15
Wednesday, October 14, 2009
BACK LIGHT/MAIN POWER
MediaTek Confidential
Title
Size
Document Number
Rev
Date:
Sheet
of
MediaTek Inc.
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
Drawn
MT5305A P1V1
V1
C
14
15
Wednesday, October 14, 2009
BACK LIGHT/MAIN POWER
MediaTek Confidential
LO = > POWER_ON
HI = > STANDBY
By Ray
5V MAIN POWER
shielding of 20-mil GND
0.925 x (1+Rup/Rdn) = 5.04V
MAIN POWER
5V&12V
䕧
ܹ
/invertor
ষ
+
CE649
100uF/16V
+
CE649
100uF/16V
D3
B340/NC
D3
B340/NC
Q3
2N3904
Q3
2N3904
1
3
2
C4
10nF
C4
10nF
CPU1
MP1484
CPU1
MP1484
EN
7
FB
5
VCC
2
OUT
3
BST
1
GND
4
SS
8
COMP
6
XR14
47K
XR14
47K
R20
10K
R20
10K
CNA1
CON6X2-H
CNA1
CON6X2-H
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
C18
0.1uF
C18
0.1uF
XR7
1K
XR7
1K
C3
0.1uF
C3
0.1uF
R89
100K
R89
100K
C13
0.1uF
C13
0.1uF
XR10
4.7K
XR10
4.7K
C19
10nF
C19
10nF
R21
100K
R21
100K
CPC29
0.1uF
CPC29
0.1uF
XQ2
2N3904
XQ2
2N3904
1
3
2
L3
15uH/3A
LCB1212
L3
15uH/3A
LCB1212
1
2
R7
2.7K_1%
R0603/SMD
R7
2.7K_1%
R0603/SMD
CPC28
1uF
CPC28
1uF
Q4
2N3904
Q4
2N3904
1
3
2
CPC30
10nF
CPC30
10nF
+
CPC31
470UF/16V
C470UF16V/D8H12.5W
+
CPC31
470UF/16V
C470UF16V/D8H12.5W
R4
12K_1%
R0603/SMD
R4
12K_1%
R0603/SMD
R8
2.2K
R8
2.2K
Summary of Contents for HL55XZK22
Page 10: ...Service Manual Model No HL55XZK22a 9 2 2 External pictures four faces Front Side Left Side ...
Page 11: ...Service Manual Model No HL55XZK22a 10 Right Side Back Side ...
Page 29: ...Chapter 7 Electrical Parts 7 1 Block Diagram Service Manual Model No HL55XZK22a 29 ...
Page 56: ...9 2 Power Supply Board Failure Check Service Manual Model No HL55XZK22a 55 ...