Motorola CM160

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8.3 Dual Tone Multiple Frequency (DTMF) Data ...............................................2-18
9.0 Receive Audio Circuits.......................................................................................2-19
9.1 Squelch Detect .............................................................................................2-19
9.2 Audio Processing and Digital Volume Control.............................................. 2-20
9.3 Audio Amplification Speaker (+) Speaker (-)................................................2-20
9.4 Handset Audio..............................................................................................2-21
9.5 Filtered Audio and Flat Audio .......................................................................2-21
10.0 Receive Signalling Circuits ................................................................................2-21
10.1 Sub-Audio Data (PL/DPL) and High Speed Data Decoder ..........................2-21
10.2 Alert Tone Circuits........................................................................................ 2-22
Chapter 3 TROUBLESHOOTING CHARTS
1.0 Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2)................................3-2
1.1 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) ................................3-3
2.0 Troubleshooting Flow Chart for 40W Transmitter (Sheet 1 of 3) .........................3-4
2.1 Troubleshooting Flow Chart for 40W Transmitter (Sheet 2 of 3)....................3-5
2.2 Troubleshooting Flow Chart for 40W Transmitter (Sheet 3 of 3)....................3-6
3.0 Troubleshooting Flow Chart for Synthesizer........................................................3-7
4.0 Troubleshooting Flow Chart for VCO...................................................................3-8
5.0 Troubleshooting Flow Chart for DC Supply (1 of 2).............................................3-9
5.1 Troubleshooting Flow Chart for DC Supply (2 of 2) .....................................3-10
Chapter 4 UHF1 PCB/ SCHEMATICS/ PARTS LISTS
1.0 Allocation of Schematics and Circuit Boards .......................................................4-1
1.1 UHF1 and Controller Circuits .........................................................................4-1
2.0 UHF1 25-40W PCB 8486577Z02 / Schematics...................................................4-3
2.1 UHF1 PCB 8486577Z02 Parts List 40W ......................................................4-19