Goodmans GPS160MPT, Руководство по обслуживанию

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AIGNMENT PROCEDURE
AM SECTION
STEP ALIGNMENT FREQ TEST EQUIPMENT SIGNALIN SIGNALOUT ADJUST REMARK
1. IF 455KHz a. MW,IF,Sweep gen with
loop antenna.
b. Alignment
Oscilloscope.
c. Power supply
Let the AM and
coil close to
the gen
antenna
Take out the
signal from U
601
Pin 7
Adjust T603
get Max.
output at
455KHz.
a. Band SW.SW in
MW Position
b. Vol. Control
in Min.
Position.
c. Tune P.V.C to
high end.
2. 1650KHz a. AM,Sweep gen with ant.
b. Alignment
oscilloscope.
c. Power supply.
Same as step
1.
Same as step
1.
Adjust
Pvc(C4)to get
max.output
at 1650khz
Tune p.v.c. to
high end.
3. 525KHz Same as step 2. Same as step
1.
Same as step
1.
Adjust T 602
get Max.Output
at 525KHz
Tune P.V.C.to low
end.
4. Reapt step 2, 3 until no further improvement can be made.
5. 1400KHz Same as Step 2. Same as step
1.
Same as step
1.
Adjust
Pvc(C3) to
get Max.output
at 1400KHz
6. 600KHz Same as Step 2. Same as step
1.
Same as step
1.
Adjust AM to
get max.output
at 600khz
Tune P.V.C.to
600KHz.
7. Reapt step5, 6and then step2,3,5,6until no further improvement can be made.
FM SECTION
STEP ALIGNMENT FREQ TEST EQUIPMENT SIGNALIN SIGNALOUT ADJUST REMARK
1. IF 10.7MHz a. AM,IF,Sweep gen
b. Alignment
Oscilloscope
c. Power supply
Let the FM and
close to the
gen antenna
Take out the
signal from
U601 Pin 6
Adjust T601
into the fig.
a. Band SW.SW IN
FM Position
b. Vol. Control
in Min.
Position.
c. Tune P.V.C to
high end.
2. 108.5MHz a. FM,Sweep gen with ant.
b. Alignment
Oscilloscope.
c. Power Supply.
Same al step
1.
Same as step
1.
Adjust Pvc(C1)
to get
Max.Output at
108.5MHz
Tune p.v.c. to
high end.
3. 87.5MHz Same as Step 2. Same as Step
1.
Same as Step
1.
Adjust L603o
get Max.Output
at 87.5Mhz
Tune P.V.C.to low
end.
4. Reapt step 2, 3 until no further improvement can be made.
5. 90MHz Same as Step 2. Same as Step
1.
Same as Step
1.
Adjust L607 to
get Max.Output
at 90MHz
Tune P.V.C.to
90MHz.
6. 106MHz Same as Step 2. Same as Step
1.
Same as sStep
1.
Adjust Pvc(C2)
to get
Max.Output at
106MHz
Tune P.V.C.to
106MHz.
7. Reapt step 5 , 6 and then step 2,3,5,6 until no further improvement can be made.