Sharp FV-1800 User Manual

GENERAL ALIGNMENT INSTRUCTIONS
Should it become necesary at any time to check the alignment of this receiver, proceed as follows;
1) Connect an output meter across the speaker voice coil lugs.
2) Set the volume control for maximum.
3) Attenuate the signals from the generator enough to swing the most sensitive range of the output meter.
4) Use a non-metallic alignment tool.
5) Repeat adjustments to insure good results.
ALIGNMENT CHART
Signal generator
Receiver
Step
Band Connection to receiver
Input signal frequency
Dial setting
Remarks
Adjustment
Connect signal generator
through a 10K ohm dummy
to the antenna tuning con-
denser.
Ground lead to the receiver
chassis.
Use radiation loop.
Loop of several turns of
wire, or place generator
lead close to receiver for
adequate signal pickup.
Generator output to one
end of this wire.
Exactly 455kHz (400Hz,
30%, AM modulated)
Tuning gang fully
open.
(minimum capacity)
Adjust for maximum
output on speaker
voice coil lugs.
T10
T8
T6
T2
Tl
Exactly 600kHz (400Hz,
30%, AM modulated)
Adjust the MW oscil-
lator core (L7), and
then adjust the MW
antenna coil (L14, L1).
(See NOTE A)
4 | MW | Repeat steps 2 and 3 until
Same as step 2
Exactly 1400kHz (400Hz,
30%, AM modulated)
1400kHz
Adjust the MW oscil-
lator trimmer (C16),
and then adjust the
MW antenna trimmer
(C201, C21).
(See NOTE A)
no further improvement can
be made.
5
LW
Same as step 2
Exactly 180kHz (400Hz,
“30%, AM modulated)
180kHz
Same as step 2
Exactly 350kHz (400Hz,
30%, AM modulated) ©
LW
Repeat steps 5 and 6 until
no further improvement can
350kHz
be made.
swl
Same as step 2
Exactly 1.7MHz (400Hz,
30%, AM modulated)
Same as step 2
Exactly 3.7MHz (400Hz,
30%, AM modulated)
1.7MHz
Adjust the LW oscil-
lator core (L6), and
then adjust the LW
antenna coil (L13, L1).
(See NOTE A)
Adjust the LW oscil-
lator trimmer (C17),
and then adjust the
LW antenna trimmer
(C22, C202).
(See NOTE A)
Adjust the SW1 oscil-
lator core (L8), and
then adjust the SW1
antenna core (L2, L15).
Repeat steps 8 and 9 until no further improvement can be made.
Adjust the SW1 oscil-
lator trimmer (C15),
and then adjust the
SW1 antenna trimmer
(C20, C12).

Sharp FV-1800 Specifications

General

Brand	Sharp
Model	FV-1800
Category	Radio
Language	English