Sailor RE2100, Technical Manual

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3 SERVICE RE2100
3.8 NECESSARY ADJUSTMENT AND CHECK AFTER REPAIR
GENERAL
After repair of the RE2100 it may be necessary to do some adjustments and checks.
The extent of these adjustments and checks can only be decided by the person, who has done the repair,
and this manual section must only be looked upon as a guide.
Any repair must, as mentioned previously, be followed by a function check after reinstallation of the
RE2100.
RECEIVER UNIT (MODULE 1)
After a Change of the Module
Execute 3.7.1.5. Adjustment of Signal Meter, and 3.5.2. Performance Check of Receiver.
Repair in 2nd Mixer and the Corresponding Input Matching Circuit
Execute 3.7.1.2. Adjustment of 70 MHz Transformer, and 3.5.2.1. Performance Check of Receiver
Sensitivity.
Repair in LO2 Buffer
Execute 3.6.1.2. Check of LO2 and Reinjection Signals, and 3.5.2.1. Performance Check of Receiver
Sensitivity.
Repair in SSB/AM Crystal Filters and the Corresponding Input/Output Matching Network
Execute 3.7.1.3. Adjustment of SSB/AM Filter.
Execute 3.6.1.3. Check of Crystal Filters, and 3.5.2.1. Performance Check of Receiver Sensitivity.
Repair in 2nd IF Amplifier and AGC Circuit
Execute 3.7.1.4. Adjustment of 2nd IF Gain, and 3.7.1.5. Adjustment of Signal Meter.
Execute 3.5.2.5. Performance Check of Receiver AGC, and 3.5.2.1. Performance Check of Receiver
Sensitivity.
Repair in Detector
Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.2. Performance Check of
Receiver Distortion.
Repair in Audio Frequency Filter
Execute 3.5.2.3. Performance Check of Receiver Audio Passband, and 3.5.2.1. Performance Check of
Receiver Distortion.
Repair in Earpiece Amplifier
Execute 3.7.1.6. Performance Check of Earpiece Level, and 3.5.2.2. Performance Check of Receiver
Distortion.
Repair in Squelch Circuit
Execute 3.5.2.6. Performance Check of Receiver Squelch.
FRONT END UNIT (MODULE 2)
After a Change of the Module
Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.3. Performance Check of
Receiver Audio Passband.
Repair in Input Protection Circuit and Pre-Filters
Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.2. Performance Check of
Receiver Distortion.
Repair in 1st Mixer and 70 MHz IF Filter
Execute 3.7.1.1. Adjustment of 70 MHz IF Filter.
Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.3. Performance Check of
Receiver Audio Passband.
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