Test Preparation; Power Supplies; Equipment; Procedure - HP 8112A Operating, Programming And Servicing Manual

lest Equipment
Test PreparatiFn

Power Supplies

Equipment

Procedure

9-4 Adjustment Procedures
Refer to Chapter 1 Introduction for the recommended test equipment
and accessories.
Refer to Chapter 10.1 Troubleshooting for instructions on how to
open up the HP 8112A instrument and prepare for servicing>
Control Board
Figure 9-1. Access to the HP 8112A for Adjustments
Digital Voltmeter (HP 34568)
1. Connect the DVM low terminal to the ground testpoint on board
Al.
2. Test the supply voltages and, if necessary, make adjustments to
achieve the levels given here:
Testpoint
Al-5.4 V
Al-23 V
A l - 1 5 V
3. Disconnect the DVM.
Microprocessor
Adjust
Result
-5.40 V f10 mV
-23.000 V f50 mV
-15.000 V f15 mV
Board