alan 9001 cb-radio
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alignment procedure
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pll and carrier oscillator portion
test equipment required: 
                     
power supply: 13,8 v       oscilloscope       frequency counter       dc voltmeter       
preparation alignment: 
                     
pa sw       off              
rit       middle position              
mode       am              
frequency       28.000 mhz              
step       condition       adjustment       procedure
1       am
rx               connect the oscilloscope and frequency counter to tp. adjust for 6.200 mhz +/- 20 hz
2       am
rx               connect the oscilloscope and frequency counter to tp. adjust for 38.6950 mhz +/- 20 hz.
check:
usb : 38.6975mhz
lsb : 38.6925mhz
3       am
rx               connect the dc voltmeter to tp. adjust for 6.5 v +/- 0.1 v
4       cw
rx               connect the oscilloscope and frequency counter to tp. adjust for 10.695 mhz +/- 20 hz
5       lsb
rx               connect the oscilloscope and frequency counter to tp. adjust for 10.6925 mhz -40 hz to + 0 hz
6       usb
rx               connect the oscilloscope and frequency counter to tp. adjust for 10.6975 +/- 20 hz
7       usb
rx               connect the oscilloscope and frequency counter to tp. adjust for 38.6975 +/- 20 hz
                         
 
band       frequency range (without modification)
a       28.000 to 28.4999 mhz
b       28.500 to 28.999 mhz
c       29.000 to 29.4999 mhz
d       29.5000 to 29.699 mhz
output frequency from pll-pcb to analog-pcb
fvco = f + 10.6950mhz + a
f = transmitting and receiving frequency
fvco = vco output frequency
a = 0khz for cw/fm/am
a = +2.5khz for usb
a = -2.5khz for lsb
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alignment procedure
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transmitter portion
test equipment required: 
                     
power supply: 13,8 v       af ssg       rf vtvm       dc am-meter
af vtvm       fm linear detector       oscilloscope       rf power meter
dummy load, 50 ohm                     
preparation alignment: 
                     
       clockwise              
       counter clockwise              
       clockwise              
swr/cal       clockwise              
rf gain       middle position              
pa sw       off              
indic sw       rf              
mic gain sw       off              
rf power       max.              
frequency       28.000 mhz              
step       condition       adjustment       procedure
1       usb
no mod.               remove the pcb between tp101, tp102 and tp103 from main pcb. connect a dc am meter to tp (+) and tp (-). adjust driver for 50 ma reading on the dc am meter.
2       usb
no mod.               remove the pcb between tp101, tp102 and tp103 from main pcb. connect the dc am meter to tp (+) and tp (-). adjust finale for 50 ma reading on the dc am meter
3       usb
1 mv mod.               connect a rf power meter to ant.jack. connect a rf vtvm, an oscilloscope and an rf linear dectector across an dummy load to the rf power meter. adjust for maximum reading en the rf vtvm. during this step, set the af oscillator so that the output is less than 20 v. repeat this step two times.
4       usb
30 mv mod.               adjust xxx for 32.5 v reading on the rf vtvm.
5       usb
30 mv mod.               adjust mod bal so that the carrier leakage at usb and lsb become minimum and almost equal.
6       cw
no mod.               connect a sw between pin 8 and 9 of acc connector. when turn on the sw, adjust for 21 watt reading on the rf power meter.
7       am
no mod.               adjust cw pwr for 10 watt reading on the rf power meter
8       am
no mod.       s-meter       adjust s-meter so that "9" lcd just light on.
9       am
1 khz 30 mv mod.       am mod       adjust am mod to obtain the 85% negative reading on the oscilloscope.
10       am
1 khz 1 mv mod.       rf meter       indic: mod. adjust rf meter so that "9" lcd just light on.
11       fm
1 khz 30 mv mod.       fm dev       adjust for +/- 3 khz deviation on the fm linear detector.
12       cw
no mod.
vol.: max.       cw pwr       connect an af vtvm across a dummy load (8 ohm) between pin 1 and pin 2 of acc connector. when turn on the sw, adjust cw pwr for 0.4 v reading on the af vtvm.
                         
 
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alignment procedure
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receiver portion
test equipment required: 
                     
power supply: 13,8 v       dummy load 8 ohm       af vtvm       oscilloscope
hf ssg:       28.000 mhz       1 khz       30% mod.
preparation alignment: 
                     
nb sw       off              
pa sw       off              
beep sw       off              
volume       max.              
rit       middle position              
mode       am              
squelch       min.              
dx/loc       dx              
frequency       28.000 mhz              
step       condition       adjustment       procedure
1       am
ssg 40db
1 khz mod.               alignment of sensitivity. adjust coils for maximum reading on the af vtvm.
2       am
ssg 66db
1 khz mod.               alignment of squelch. set squelsch to maximum. adjust vr102 so that the squelch just breaks.
3       am
ssg 46db
no mod.               alignment of s-meter. adjust so that "9" lcd just lights on.
4       fm
ssg 1 mv
1.5 khz dev.               adjust for maximum reading on the af vtvm.
5       am
ssg 1 mv
noise gen.               adjust for maximum reading on the af vtvm. noise generator output: 50 hz sq wave 2 v p-p.
                         
microphone connection
pin       description
1       microphone
2       ground
3       tx key (connect to ground)
4       program up (connect to ground)
5       program down (connect to ground)