Sanyo RP8700 - Alignment Procedures

ALIGNMENT PROCEDURES
GENERAL ALIGNMENT CONDITIONS
1. The position of volume control is at maximum position.
2. Signal input must be kept as low as possible to avoid overload.
3. Use an output meter of the highest possible sensitivity.
4. Standard modulation is 400 Hz at 30% amplitude (for AM) and 22.5 kHz deviation (for FM).
MW BAND — Band selector switch in MW position
3
1
2 Same
Same
4
505 kHz
1650 kHz
Connection
of
Input
Signal
|
Dial
Setting
Connection
of
Signal
Gen.
of
Radio
Output
Meter
Adjust
_
| Highest End
Lowest End Across Speaker
Lowest End
Remarks
IFT 1304, 305
Osc. Coil L115
Osc. Trim. CT-3
Adjust for Maximum
Same | GO00kHz | 600 kHz Same Ant. Coit L110-1
5 Same 1400 kHz | 1400 kHz Same Ant. Trim. CT-4
Repeat steps 1 thru 5 to obtain maximum sensitivity.
FM BAND - Band selector switch in FM position
Connect Sweep
Marker Genera-
! tor to VC ANT.,
| Earth
2 Same
| Connect Signal
3 | Generator to
| TP2, 3
10.7 MHz
10.7 MHz ||
87.0 MHz |
109.0 MHz
Connection
of
Input
Signal
|
Dial
Setting
|
Connection
of
Meter
|
Signal
Gen.
of
Radio
or
Oscilloscope
Adjust
Fremarks
| Lowest End
i
Lowest End
Lowest End
Highest End
90 MHz
108 MHz RF Trim. CT-1 Same
Connect scope input
cable thru network IFT, T3801, 302
to TP4, Earth
Adjust for Maximum
sensitivity with sym-
metrical curve
Connect scope input
cable thru network {FF 303
to R338, Earth
Adjust for symmetri-
cal ’’S’’ curve
Connect V.T.V.M.
across speaker
Osc. Coil 104 Adjust for Maximum
Same Osc. Trim. CT-2
Same RF Coil L101, 102 Same
Repeat steps 71 thru 6 to obtain maximum sensitivity.
SW1 BAND — Band selector switch in SW1 position
Connection of
Signai Gen.
1 , Dummy Anten na
2 Same
3 Same
4 Same
'
i
|
|
Input Signa!
Frequency
2.2 MHz
7.6 MHz
2.5 MHz | 2.5 MHz
6.8 MHz
Dial Setting
of Radio
| Lowest End
—-_,
| Highest End
Connection of
Outour- Meter | Adjust Remarks
ae ts * . -
Across Speaker | Osc. Coit L116 ~ | Adjust for Maximum
Same Ose. Trim. CT-9 Same
6.8 MHz
Same Ant. Coil L110-2 Same
Same Ant. Trim. CT-5 Same
Repeat steps 1 thru 4 to obtain maximum sensitivity.
SW2 BAND — Band selector switch in SW2 position
Connection of
Signal Gen.
Input Signal
Frequency
12.2 MHz
9.6 MHz
11.8 MHz
; 11.8 MHz
Dial Setting
of Radio
Lowest End
; Highest End
9.6 MHz
Connection of
Output Meter Adjust Remarks
Osc. Coil L117, Adjust for Maximum
Osc. Trim. CT-10 | Same
sen Cok Eid
Ant, Trim. CT-6
Repeat steps 5 thru 8 to obtain maximum sensitivity.
SW3 BAND — Band selector switch in SW3 position
Ste Connection of
P Signal Gen.
1 Dummy Antenna
Same
Input Signal
Frequency
15.0 MHz
18.2 MHz
Dial Setting
of Radio
Lowest End
Connection of
Across Speaker Osc. Coil L119 Adjust for Maximum
Highest End
Same | =6©15.3 MHz 15.3 MHZ
Same 17.8 MHz
Same Ant. Coil L113 Same
Same Ant. Trim. CT-7
Repeat steps 7 thru 5 to obtain maximum sensitivity.
SW4 BAND — Band selector switch in SW4 position
Connection of
Signal Gen.
5
Input Signal
Frequency
Dial Setting
of Radio
Bee Dummy Antenna 21.2 MHz Lowest End
Connection of
|
Output
Meter
Remarks
Same Osc. Coil L122 Adjust for Maximum
| 6 | Same 28.5 MHz Highest End |
Same 21.6MHz | 21.6 MHz
LB? Same 26.8MHz | 26.8 MHz Ant. Trim. CT-8 Same
Same Osc. Trim. CT-12 Same
| Same Ant. Coil L114 Same
Repeat steps 5 thru 8 to obtain maximum sensitivity.