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1. ALIGMENT
Note: Key the radio while making adjustments or measurments.
1.1 GENERAL
Perform all adjustments at a supply voltage 13.2 ~0.1 volts dc, unless the instruction call for a
different voltage.
Interpret instruction to turn controls clockwise (CW) or counterclockwise (CCW) to mean »as viewed
from the component side of the circuit board«.
Picture A and B show the locations of the components.
When you perform any of the tune-up procedures given in sections 1.2, 1.3, 1.4 and 1.5, the radio
must be completly assembled except for the chassis cover, top cover of the synthesizer compartment,
and the radio sleeve. When you have completed the tune-up, install the synthesizer cover, chassis
cover and sleeve before testing the radio against specifications following the procedures given in
sections 1.4, 1.5, 1.6 and 1.8 .
The following test equipement is recommended for aligning and servicing the MC micro radio:
R2001D
Communication System Analyzer
or
R2200B
GTF180A
GTF244A
Adapter cable for MC micro
PFT4053A
Psophometric filter
FTP3005B
Select 5 test unit (not rquired with R2001D)
R1001B
Power supply
or
S1347D
Power supply (for radios with 10 watts or less power)
R1037
Digital multimeter
or
R1024B
Digital multimeter
1.2 TO ADJUST THE TRANSMITER
(1) Preset the following pots:
* HI PWR
* LO PWR
* VOLT LIMIT
(2) Adjust the radios dc supply voltage to 13.2 ~0.1 VDC (12.6 VDC for MAU1, six-watt model).
(3) Select the channel with highest transmit frequency.
Motorola M110/MC micro aligment (VHF)
Service Monitor
Mobile test set with
R453
R455
R463
Fully CCW
Fully CCW
Fully CW
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Summary of Contents for Motorola M110
- Page 1 Motorola M110/MC micro aligment (VHF) 1. ALIGMENT Note: Key the radio while making adjustments or measurments. 1.1 GENERAL Perform all adjustments at a supply voltage 13.2 ~0.1 volts dc, unless the instruction call for a different voltage. Interpret instruction to turn controls clockwise (CW) or counterclockwise (CCW) to mean »as viewed from the component side of the circuit board«.
- Page 2 (4) Connect the radio anrenna output to an accurate RF power meter that provides a 50-ohm load. (5) Connect a dc voltmeter from the steering line test point (SL) to ground. Meter impedance should be 11 megaohms or more. (6) Key the radio and adjust coil L210 until the voltage reads 7.0 VDC (7) Select the channel with the lowest transmit frequency.
- Page 3 (15) Verify that all channels (all high power channels in MAB889) produce at least 1.0, 10.0 or 25.0 watts as appropriate for MAU0, MAU2 and MAU3 models. Verify that no channels produces more than 6.0 watts for MAU1 models. (16) If the radio has option MAB889 (slaved RF power level) select any low power channel. Key the radio and adjust R455 for an output power of 1.0 watt (or other specified power setting) for MAU1 and MAU2 models.
- Page 4 (7) Key the radio and observe tha waveform on an oscilloscope connected to demodulated output of a test receiver. Test receiver should be non-deemphasized and there must be dc coupling between the test receiver and the scope. (AC coupling is suitable if the corner frequency is 2 Hz or lower.) Adjust R305 (REF MOD) for the flattest sguare-wave response with minimum tilt.
- Page 5 (4) Preset the slugs of L1 thru L7 for f flush with the circuit board. tune (5) Connect a dc voltmeter from the local oscilator test point (LO) to ground. (6) Peak the injection filter coils L6, L5 and L7 in that order, for maximum dc voltage typiclly between 2.1 and 3.5 VDC.
- Page 6 Picture »A« Aligment points on RF board...
- Page 7 Picture »B« Aligment points on command board...
- Page 8 Picture »C« Connecting Audio Oscillator to microphone 47 uF 16 V TO J5 PIN 6 (OR TO J1001 PIN 4) 560 ohm AUDIO OSC. ¼ watt TO J5 PIN 2 (OR TO J1001 PIN 5) This is a transcript from service manual, there might be some tipo errors in the text, so I can not overtake any responsibility of any sort of the possible damages to your radio.