Nikko Gamma I - Circuit Board

Tune the unit for outside of the FM bandwidth, then adjust T102 (Figure 2) until M1 (Center-of-Channel Tuning Meter)
indicates mid-scale. Connect DC voltmeter to test point “TP’’ (Figure 2) and adjust T103 (green core) (Figure 2) for
0+ 50 millivolts.
Attenuate generator output for O ~ 6 dB. Tune the unit for 98 MHz modulated signal, then adjust “JF’’ transformer
located in Front End (Figure 4) until M2 indicates maximum deflection.
Attenuate generator output for 60 dB and set IF BAND switch to “WIDE” position. Adjust T103 (red core, Figure 2)
for minimum distortion. If M1 does not indicate mid-scale, repeat steps 3, 4 and 5.
Adjust R135 (Figure 2) until M1 indicates a “4.5 + 0.3 meter reading.
Set IF BAND switch to “NARROW” position again and adjust R137 (Figure 3) until! M2 indicates a “4.5 + 0.3” meter
reading.
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T101 R112
PLF101
Figure 2. I-F CIRCUIT BOARD (TOP VIEW)
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6061322 R323
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R302 R305
Figure 3. MPX/REGULATOR CIRCUIT BOARD (TOP VIEW)