Yaesu FT-736R Technical Supplement page 124

J. 50 MHz TX Mixer (on 50 MHz RF
Unit)
K. 50 MHz TX IF, Part I (on 50 MHz
RF Unit)
1. Connect the test equipment as
shown in the diagram above.
2. In FM mode, tune the transceiver
to 52.00000 MHz, FM mode. Set the
MIC Gain fully counterclockwise
and DRIVE fully clockwise.
3. Press the MOX button and adjust
VR2003 so that the spurii at 13.79
MHz on either side of the carrier
are at least 65dB down.
4. Press the MOX button again to
return to receive.
Connect the test equipment as
shown above, with the AF gener-
ator set for 3mV @ 1 kHz.
Set the transceiver to USB, at the
center of the 144 MHz band.
Set the DRIVE control fully clock-
wise, press the MOX button to
transmit, and adjust the MIC gain
for 5W output. Press the MOX
button again to return to receive.
Retune the transceiver to 52.00000
MHz.
Press the MOX button and adjust
VR2002 for 5W output.
Press the MOX button to return
to receive, and disconnect the test
equipment.
V. FEX-736-220
A. 220 MHz PLL Sub Loop (on 220 MHz
PLL Unit - requires oscilloscope and
DC voltmeter)
1. Connect the 'scope to TP1001 and
the DC voltmeter between TP1002
and chassis ground.
2. Tune the transceiver to 222.01999
MHz, CW mode, and adjust T1002-
T1005 for maximum amplitude on
the 'scope.
3. Adjust L1016 for 4.2V on the
voltmeter.
4, Retune the transceiver to 222.02000
MHz and confirm at least 0.6V on
the voltmeter.
5. Disconnect the 'scope and volt-
meter.
ie =
I,
4.
Connect the voltmeter between the
exposed lead of R1055 and chassis
ground.
Tune the transceiver to 222.01999
MHz, CW mode, and adjust L1009
for 6.0V on the voltmeter.
Retune the transceiver to 222.02000
MHz and confirm at least 1.0V on
the voltmeter.
Disconnect the voltmeter.
1. Connect the DC voltmeter between
the exposed lead of R1022 and
chassis ground. Connect the RF
voltmeter to pin I of J1001.