Thermo Scientific 49i Instruction Manual page 176

Troubleshooting
Connector Pin Descriptions
6-14 Model 49i Instruction Manual
Table 6-4. Front Panel Board Connector Pin Diagram, continued
Connector Reference
Label Designator
LCD DATA J2
KEYBOARD J3
LCD BACKLIGHT J4
Pin Signal
Description
32 Ground
33 +24V
34 +24V
1 LD0_5V – LCD Signal
2 LD1_5V – LCD Signal
3 LD2_5V – LCD Signal
4 LD3_5V – LCD Signal
5 LCD_ONOFF_5V – LCD Signal
6 LFLM_5V – LCD Signal
7 NC
8 LLP_5V – LCD Signal
9 LCLK_5V – LCD Signal
10 +5V
11 Ground
12 -25V
13 LCD Bias Voltage
14 Ground
1 Keypad Row 1 Input
2 Keypad Row 2 Input
3 Keypad Row 3 Input
4 Keypad Row 4 Input
5 Keypad Col 1 Select
6 Keypad Col 2 Select
7 Keypad Col 3 Select
8 Keypad Col 4 Select
1 +5V
2 NC
3 Ground
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