Galaxy DX 929, Service Manual

Page: 13 / 37

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4.1.2 TRANSMITTER ALIGNMENT
ITEM U.U.T. SETTING
ADJUST
POINT
MEASUREMENT
TX Power Set radio to CH 19 AM TX mode.
Connect RF Power Meter to antenna jack.
Set SWR/MOD/PWR Switch to PWR. L40, L42,
L43, L44 MAX > 12W
Balance Power
Between CH. 1 - 40
AM TX
High Power Set radio to CH 19 AM TX mode.
Set RF POWER fully clockwise.
VR14
3.8 W
AM TX
Low Power Set RF POWER fully counterclockwise.
VR18
0.3W
±
0.2W
RF Power
Meter Set radio to CH 19 AM TX mode.
Set RF POWER fully clockwise.
Set SWR/MOD/PWR Switch to PWR
position.
VR9 For a needle reading
of “4” on TX PWR
scale.
AM TX
Modulation
Set radio to CH 19 AM TX mode.
AF signal 30mV, 1 KHz to microphone.
Set MIC Gain fully clockwise.
Set SWR/MOD/PWR Switch to MOD position
VR16
For a needle reading
of 90% on the
external modulation
meter.
AM Modulation
Meter Set radio to CH 19 AM TX mode.
AF signal 30mV, 1 KHz to microphone.
Set MIC Gain fully clockwise. VR15 For a needle reading
of 90% on the
modulation scale.
4.1.3 RECEIVER ALIGNMENT
ITEM U.U.T. SETTING
ADJUST
POINT
MEASUREMENT
AM Sensitivity Set radio to CH 19 AM RX mode.
Set RF GAIN fully clockwise.
Set SQ fully counter-clockwise.
Set VOL Control at 2 o’clock.
Connect RF SG to antenna jack
Frequency 27.185 MHz, 1uV. Mod 30%.
L5, L6,L7,
L8, L9, L10,
L2, L3
Audio Output > 2V
S/N > 10 dB.
Set radio to CH 40 AM RX mode.
RF SG setting 27.405 MHz.
Set radio to CH 1 AM RX mode.
RF SG setting 26.965 MHz.
L5,L6
For Balance Between
CH 1 and CH 40.
NB Adjust Set radio to CH 19 AM RX mode
RF SG setting 27.205 MHz,
100uV. Mod 30%.
Set switch to NB/ANL position.
Connect Multi-meter to TP1 (D2 cathode).
L1
DC Voltage to max.
(> 2.0V)
AM Squelch Set radio to CH 19 AM RX mode.
Set SQ Control fully clockwise.
RF SG setting 27.185 MHz, 20mV. Mod 30%.
VR4 Adjust very slowly
until squelch just
closes.
AM S-Meter Set radio to CH 19 AM RX mode.
RF SG setting 27.185 MHz, 100uV. Mod 30%.
VR1 For a reading of “9”
on the “S” scale.