Alignment Procedures - Goodmans GMS880 Service Manual

FM AND AM RF ALIGNMENT CHART IF
Step Item
Unless otherwise specified set switches as follows:
FM Function: FM
Adjust generator frequency to a center of the FM band where no FM brodcast exists
IF
Adjustment
FM
Band
Tracking (1)
Tracking (2)
Repeat steps 3 and 4.
AM
IF
Adjustment
AM
Band
Tracking (1)
Tracking (2)

ALIGNMENT PROCEDURES

Input Circuit Output Circuit
Setup
Connect FM IF Connect C519 and GND
sweep output IF-OUT terminal to
terminal to IC501 IF sweep input terminal
Headphone jack or
speaker terminal
FM SG ANT. Headphone jack or
Terminal 90 MHz, speaker terminal
1kHz, +-22.5kHz dev
106 MHz, 1 kHz Headphone jack or
+-22.5 MHz dev speaker terminal
Connect standard loop Connect input terminal
antenna to output ter- genescope to detector
minal of genescope output
Headphone jack or
speaker terminal
600 kHz 400 kHz, Headphone jack or
3% mod speaker terminal
1400kHz 400 kHz, Headphone jack or
3% mod speaker terminal
Tuner
Setup setting
FM in band
end
87.5 MHz
108.5MHz PVC201-FC1 Adjust for max output
90 MHZ
MONO
106MHz PVC201-FC2 Same as above.
AM in band
end
520 kHz
1630 kHz PVC201-C2 Adjust for max output
600 kHz
1400 kHz PVC201-C1 Same as above.
Adj - Adjustment
Point
T201 Adjust for straight and
T503 symmetrical S-curve
Adjust with max.amplitude.
L502 Adjust for max output
L501 Adjust for max.output and
best waveform
Adjust tor max. amplitude
with symmetrical 455kHz.
T505 Adjust for max output
L506 Adjust for max.output and
best waveform
5