GE MAC 1200

Revision D MAC 1200 resting ECG analysis system 2-19
2012250-095
Functional Description: Internal Interfaces
BATT/
Interface to the LCD Graphics Display
The interface to the LCD graphics display provides the LCD data signals, the
display supply voltages +5 V and VEE, the display contrast voltage V0 and the
display on/off control signal.
Connector denotation: HOS/
Type: Foil connector, 14-pin, zero power insertion, 180°
The LCD supply voltage VEE can be measured at R 731 on the PCB Control
CS_CI, the LCD contrast voltage can be measured at R 730. Both levels of these
voltages depend on the contrast selected.
The voltage supply for the CCFL tube of the display is provided separately via the
connector BL/.
CAUTION
Do not touch. High AC voltage.
Pin Number Signal Input/Output Function Definition
1 +24V Output Supply battery charging
2 +24V Output Supply battery charging
3 +24V Output Supply battery charging
4 Code Coding Pin
5 NC
6 GND24V Common Ground
7 GND24V From power supply
8 GND24V After ferrite decoupling
9 GND24V
10 +UBATT Input Battery voltage
11 +UBATT Input Battery voltage
12 +UBATT Input Battery voltage
13 +UBATT Input Battery voltage
14 +UBATT_ME Input Battery measuring output
15 Code Coding Pin
16 +5V_L Output +5 V supply
17 NC
18 BATT_OPT_ Input Status option battery 0: Option active
19 LOAD_OFF Output Charging reduction 1: Reduced charging
20 NC