Read Panasonic KX-NT630RU-B Service Manual online
10
KX-NT630 Series
4.2.
Circuit Operations
4.2.1.
LCD Circuit
LCD data are output from pin C19 of IC1001 to LCD module.
LCD contrast is set by electronic control in LCD module.
+3.3V of the power supply voltage is pressurized about four/three times in the LCD module and used as LCD driving voltage
(approx. 16V).
The driving voltage is observed at between C1061 terminals.
The lighting of the backlight is controlled by Q4001.
The PWM (Pulse Width Modulation) signal is output from IC1001 (pin U13) pin and the brightness is changed according to its duty
ratio.
LCD contrast is set by electronic control in LCD module.
+3.3V of the power supply voltage is pressurized about four/three times in the LCD module and used as LCD driving voltage
(approx. 16V).
The driving voltage is observed at between C1061 terminals.
The lighting of the backlight is controlled by Q4001.
The PWM (Pulse Width Modulation) signal is output from IC1001 (pin U13) pin and the brightness is changed according to its duty
ratio.
4.2.2.
Reset Circuit
Reset Signal is output from IC4001 and input into IC1001-pin V12.
PDN is DC power down detect.
Detect the AC and PoE power down signal.
PDN is DC power down detect.
Detect the AC and PoE power down signal.
lcda0
lcdd0
lcdd0
lcdclk
R1101
R1102
R1102
LCD_CLK
LCD_D0
LCD_A0
LCD_CS
LCD_CS
LCD_RST
R1074
LCD_RST
ST_UCFG0
ST_CKMN1
ST_CKMN0
ST_BOOTNFL
ST_UCFG4
ST_UCFG2
ST_UCFG3
DG
DG
CN1002
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
11
12
13
14
15
16
17
18
LCD_PWM
5V
C1058
DG
C1060
DG
VDD3R3V
C1059
C1062
DG
C1061
D1026
C1063
R1111
W7
P11
U1CTS/DIGMIC_DATA
R12
U1RTS/DIGMIC_CLK
F14
SPI1CS0
G14
SPI1DI
E15
SPI1CK
E17
SPI1DO
D18
SPI2CK
D17
SPI2DI
C19
SPI2DO
F17
T1SCLK
E18
F1SYNC
D19
D1RX
F15
D1TX
V11
SD_D0
W11
SD_CMD
W10
SD_CLK
R1118
R1100
R1100
R1077
R1078
R1081
R1072
R1076
R1083
R1116
R1098
R1099
R1099
C1067
DG
DG
C1068
R1112
R1117
R1117
KEY_COL7/SPI2CS
R1026
LCD_RST
J3
MEMDQMBLS1/EXTINT5
IC1001
LCD
C4069
DCDC_GND
SINK_GND
AG
C4086
C4087
R4033
AVCC3R3V
VDD3R3V
AG
AG
CL_VDD18V
EXT_REG_CTL
C4078
C4070
R4037
C4091
Q4001
R4038
LCD_PWM
DG
R4040
V15
VDD18_DCDC
W16
VCC33_DCDC
N13
VDD_ANA
V17
VCC_ANA0
W12
VCC_ANA1
N16
VCCA
T13
EXT_REG_CTL
U13
PWM0
IC1001
AG
VDD1R3V
PWR_RST
C4056
C4066
PDN
003:6C
003:6C
R4025
3R3V
C4041
IC4001
4
OUT
3
CD
1
VSS
2
VDD
L4009
C4063
C4040
DG
DG
DG
DG
TPX1
P13
TPX2
R18
TPY1
T18
TPY2
P18
TPS
V12
RSTN
T12
TEST_ANA
L16
IF_CLK_IF
P14
VREF
D12
VDD0
E5
VDD1
E6
VDD2
E8
VDD3
H5
T17
DC_J
PDN
004:5D
R3018
D3005
C3070
C3069
PoE_DC
+12V
JK3001
2
3
1
F3001
32V
3A
R3019
D3002
D3003
LF3001
2
3
4
1
DG
DG
C3035
C3034
R3025
DG
C3032
R3024
C3036
DG
C3066
DG
C3033
C3028
from PoE
from AC Adaptor
Click on the first or last page to see other KX-NT630RU-B service manuals if exist.