Sharp Aquos LC 37HV6U, Service Manual

Page: 67 / 264

67
67-1
67-2
LC-37HV6U
Ë
VHI-1Y(ASSY:IC1706)
DC-DC converter power IC
»
Block Diagram
Pin No
.
Pin Name
I/O
Pin Function
1
S/S
I
capacitor connection terminal for a soft start.
2
OCL-
I
Over(
–
) current-detection terminal.
3
OCL+
I
Over-current (+) detection terminal.
4,26
GND
—
GND terminal.
5
R/C
I
Remote ON/OFF control terminal.
6
Vcc
—
Power supply terminal of a control circuit.
8
Vboot
I
Power supply terminal of a main switch and MOSFET control circuit.
9
VGL
I
Gate terminal of the Low side MOSFET for periodic rectification.
11~14
VOUT
O
Output terminal of the power stage.
16
P.GND
—
GND terminal of an output circuit.
18~21
VDD
—
Power supply terminal of the main switch MOSFET.
23
VGH
I
Gate terminal of the high side MOSFET for periodic rectification.
25
VB
I
Output bootstrap terminal. Capacitor is connected between VB terminal and VOUT and the circuit for control of MOSFET inside IC is bootstrapped.
27
VTS
—
Terminal for TEST. Please do not connect anywhere.
28
Vref
I
Internal standard voltage output terminal.
30
ampOUT
O
Built-in error amplifier output terminal.
32
amp-
I
Built-in error amplifier reversal input terminal. .
7,10,15,17,
N/C
—
It is a no-connection terminal.
22,24,29,31
»
Pin Function
Ë
RH-IXA802WJN3Q(ASSY:IC1901)
PLD(Programmable Logic Device)
»
Pin Function
Pin No
.
P
in Name
I/O
Pin Function
1N
C
—
Non connection
2
SP_CP2
I
C
lamp signal input terminal from the synchronous separation IC.
(with 15k system)
3
SP_VD
I
V
ertical synchronized signal input terminal from the synchronous separation IC
4
GND
—
Ground
5
SP_HD
I
Horizontal synchronized signal input terminal from the synchronous separation IC
6
VD3
O
Vertical synchronized signal output terminal to the synchronous separation IC
7
HD3
O
Horizontal synchronized signal output terminal to the synchronous separation IC
8
SP_CP1
I
C
lamp signal input terminal from the synchronous separation IC.
(with normally)
9
TDI
I
Data input terminal for ISP
10
TMS
I
M
ode input terminal for ISP
11
TCK
I
C
lock input terminal for ISP
12
TEXT_HD
O
TEXT_HD output terminal
13
US_HD
I
RCA/TEXT horizontal synchronized input terminal
14
TEXT_VD
O
T
EXT_VD output terminal
15
Vcc3.3V
—
Power supply terminal
16
US_VD
I
RCA/TEXT vertical synchronized input terminal
17
GND
—
Ground
18
MODEA
I
Mode selection signal A
19
MODEB
I
Mode selection signal B
20
MODEC
I
Mode selection signal C
21
SELA
I
MAIN, VIDEO, CHROME/ RCA HD change control signal
22
SELO
I
S
ynchronized signal output control signal input terminal for TEXT
23
SELC
I
HD change control signal input terminal for closed captions
24
TDO
O
Data output for ISP
25
GND
—
Ground
26
Vcc3.3V
—
Power supply terminal
27
VD1
I
M
AIN, VIDEO, CHROME vertical synchronized signal input terminal from IC
28
HD1
I
MAIN, VIDEO, CHROME horizontal synchronized signal input terminal from IC
29
PL_VD
O
Vertical synchronized output terminal
30
PL_HD
O
Horizontal synchronized output terminal
31
PL_CP
O
Clamp signal output terminal
32
PL_BLK
O
H
blank signal output terminal
33
MODED
I
M
ode selection signal D
34
NC
—
Non connection
35
Vcc3.3V
—
Power supply terminal
36
NC
—
Non connection
37
CC_HD
O
Horizontal synchronized signal for closed caption
38
ow_vblk
I
V blank signal input terminal for auto wide
39
HDS
O
Horizontal synchronized signal output terminal for PC board.
40
VDS
O
Vertical synchronized signal output terminal for PC board.
41
HD2
I
Horizontal synchronized signal input terminal from SUB, VIDEO, CHROME IC
42
VD2
I
Vertical synchronized signal input terminal from SUB, VIDEO, CHROME IC
43
CLK
I
C
lock input
44
NC
—
Non connection