Alignment Points - Sanyo MS30F Service Manual

TUNER ADJUSTMENT (Continued)
AM ALIGNMENT Standard Test Frequency 400Hz and Modulation 30% at AM
Connections _ Frequency
——— : _ _of Signal
| INPUT OUTPUT Generator
Connect loop 3
460kKHz Low End T4
1,670kHz |} HighEnd | PTC3 (PVC)
Alignment _ Tuning Dial) agiustments Remarks
ae | Setting :
Obtain symmetrical curve
antenna to output Connect input and maximum amplitude.
Calibration terminal of terminal of gene-
of IF gene-~-scope. scope to Pin
Obtain sine-wave of 400Hz
Calibration Connect loop
Connect VTVM with
of antenna to output | and maximum amplitude.
Tuning Range | terminalofAM | 160 dummy load | a
: | signal generator. |. and oscilloscope 7 |
Adjustment .| Placeloop antenna | toearphone Max. |
of 60cm away from jack.
Tracking bar antenna. 8
PTC4 (PVC)
Repeat the above steps until no further change is noted in any of the adjustments.
FMALIGNMENT
Alignment 3 — — _ — , of Signal peal i Adjustments - Remarks
INPUT OUTPUT _ — | Generator; °°ttlng ,
Connect output Connect input Obtain S curve and
Terminal of gene- terminal of gene- | maximum amplitude.
Calibration scope to Pin 1 scope to Ping
of of IC1 (TP2) | of IC2 (TP9). 10.7MHz.|. .LowEnd — TlandT2
uF _ | through ceramic
. | capacitor (1 O00pF).
_ Standard test frequency 400Hz and deviation 22.5kHz
Calibration | ConnectFM signal -| a 87.35MHz a ee Obtain sine-curve and
Of generator to — Connect VTVM with a : - maximum amplitude.
Tuning Range | antenna terminalis ~160 dummy load 108.25MHz |
———--——| (TP1) through | andoscilloscope —
of (750, unbalanced jack. - : : | 4s
Repeat the above steps until no further change is noted in any of the adjustments. |
ALIGNMENT POINTS
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