Motorola MICOM-3F Service Manual page 58

Figure 6-1.B. Receiver Troubleshooting Flowchart (Sheet 2 of 2)
Cat. No. 6886859J01
A
Check second injection
Check 450 KHz signal
(IF filter)
Check 20 KHz signal
Check A/D
Reception possible
Check DSP output
signal
Check audio amplifier
Check flat cable to
Control Head board
Problem
Check synthesizer
found
Problem
Check second mixer
found
Check 950 KHz
Problem
found ceramic filter
Check A/D
Problem
found DC voltage
Problem
Check VCC
found
Check A +
Problem
found (13.8 V)
6-3