Troubleshooting
Connector Pin Descriptions
Thermo Electron Corporation Model 42i Low Source Instruction Manual 6-17
32 Ground
33 +24V
34 +24V
LCD DATA J2 1 LFLM_5V – LCD Signal
2 LLP_5V – LCD Signal
3 LCLK_5V – LCD Signal
4 LCD_ONOFF_5V – LCD Signal
5 +5V
6 Ground
7 LCD Bias Voltage
8 LD0_5V – LCD Signal
9 LD1_5V – LCD Signal
10 LD2_5V – LCD Signal
11 LD3_5V – LCD Signal
12 LD4_5V – LCD Signal
13 LD5_5V – LCD Signal
14 LD6_5V – LCD Signal
15 LD7_5V – LCD Signal
16 Ground
KEYBOARD J3 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
LCD BACKLIGHT J4 1 LCD Backlight Voltage 1
2NC
3NC
4 LCD Backlight Voltage 2
Table 6-5. Front Panel Board Connector Pin Diagram, continued
Connector
Label
Reference
Designator
Pin Signal
Description
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