4 SERVICE RT2047 DSC - PART II
4.10 NECESSARY ADJUSTMENTS AFTER REPLACEMENT OF A MODULE
4.10.1 REPLACEMENT OF RECEIVER UNIT MODULE 100
1. Adjustment of RF and IF amplifier, point 1 - 12.
2. Alignment of detector, telephone-amplifier, LF-power-amplifier and the AF from Rx buffer, point 1
- 15.
3. Adjustment and control of receiver sensitivity, point 1 - 7.
4. Adjustment of Squelch, point 1 - 6.
4.10.2 REPLACEMENT OF RX-SYNTHESIZER MODULE 200
Normally the module is adjusted from the factory. Just control the frequency on the soldering point for
FL01 to Rx on a simplex channels e.g. oh. 6 to be in Rx-mode: 156.300 MHz - 21.4 MHz = 134.900 MHz
and in Tx-mode: 156.300 MHz - 16.8 MHz = 139.500 Mhz.
4.10.3 REPLACEMENT OF TX-EXCITER MODULE 300
Follow the procedure in section 4.5.3. Adjustment of Tx-exciter:
1. Control of frequencies and DC-control voltage to VCO, point 1 - 5.
2. Adjustment of Tx-drive level, point 1 - 5.
4.10.4 REPLACEMENT OF TX-POWER AMPLIFIER MODULE 400
Follow the procedure in section 4.5.4. Adjustment of Tx-Power Amplifier about adjustment of output
power, point 1 - 7.
4.10.5 REPLACEMENT OF INTERFACE UNIT MODULE 6/600
1. Follow the procedure in section 4.5.1. Adjustment of Interface Unit about adjustment and control
of voltage regulators, point 1 - 9 and adjustment of the SELCALL TEST TONE.
2. Section 4.5.5. Adjustment of Modulation on Interface Unit, point 1-13.
3. Section 4.5.6. Adjustment of Receiver Unit about adjustment of Telephone-amplifier, LF-power-
amplifier and the AF from Rx buffer amplifier, point 1 - 15, leaving out point 3, 5 and 8 and about
adjustment of squelch, point 1 - 6.
4. Section 4.5.4. Adjustment of TX-Power Amplifier, point 5 - 7.
PAGE 4-7
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