Test Point 4

TEST POINT 4
Data Lead, DSP - PCm
Open Circuit/Short To Ground
Short To B+
Signal Disturbance

Fault Code 23

Open Circuit/Short To Ground

1. Pull off plug II on the display and operator control unit.

2. Pull off plug 1 (18-pole) on the amplifier.

3. Check lead from plug II, pin 14 to plug I, pin 17 for continuity and short to ground.

Short to B+

1. Pull off plug II on the display and operator control unit.

2. Pull off plug I (18-pole) on the amplifier.

3. Check lead from plug II, pin 14 to plug I, pin 17 for short to B+.

Signal Disturbance

- Check lead from plug II, pin 14 to plug I, pin 17 for short with other leads.