Test Point 4
Test point 4Data 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 I (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.