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78 inches
CN9003 (To Main & FT)
2
SCL_LED
4
TEST_SD
6
GND
8
VSYCN_IN
10
SERIAL_UHR
12
GND
14
CONTACT
CN9003
BACKLIGHT CONTROL
<Direct Lit 200 Segments>
LD Board Operation
1.
CN9005 ~ CN9014 supply voltages to the panel LED arrays
2.
The positive (+) pins supply approximately 13Vdc (panel size dependant)
3.
The negative pins will vary between approximately 1Vdc and 3Vdc, depending on the brightness level of that section.
1
GND
2
3
BLU_ON
4
5
SDA_LED
6
7
TEST_LD
8
9
SERIAL_STT
10
11
SERIAL_DATA
12
13
GND
14
16
18
20
22
<LD BOARD>
(-) Control Pins
(+) Supply Pins
CN9001 (To SMPS)
GND
1
GND
GND
3
GND
Vdrv
5
Vdrv
Vdrv
7
Vdrv
Vdrv
9
Vdrv
Vdrv
11
Vdrv
Vdrv
13
Vdrv
GND
15
GND
GND
17
GND
GND
19
B13V
GND
GND
CN9001
CN9013 (SAMPLE)
4. Troubleshooting
Fuse (7EA)
4-9
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