Schiller AT-102, Service Handbook

Page: 103 / 140

5.7
Article Number 2. 540 028
SCHILLER AG 2002
AT-102 ECG Service Handbook
Section 5
Adjustments
Battery Charge Voltage
Precautions and Requirements
The unit must be placed on an antistatic mat and antistatic precautions observed when any
maintenance is carried out on the AT-102. The room temperature should be between 18 and
28 degrees.
Tools and Equipment
• Digital voltmeter
• Small flat bladed screwdriver
• Resistor 2.7kOhms, 250mW
Procedure
The battery charge voltage is nominally 13.5V. Adjust and check as follows:
1. Disassemble the unit as detailed in chapter 4.
2. Remove the Main board MK 18 - 1 from the assembly and remove the EMC shield
from the board.
3 Replace the board in position.
4. Remove the two battery connectors (if not already removed) and connect a 2.7 kOhm
250mW resistor across the two battery connectors on the main board to simulate a
discharged battery. Connect the digital multimeter across the resistor.
5. Connect the Mains supply.
WARNING
Exercise care - be aware that potentially lethal voltages are present
6. Adjust VR3 to obtain a charging voltage of 13.5V.
7. Disconnect the mains supply and reassemble the unit as detailed in Chapter 4.