Panasonic RX-F20L - Measurements and Adjustments

RX-F20L
MEASUREMENTS AND ADJUSTMENTS
@ ALIGNMENT INSTRUCTION
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
. Set volume control to maximum.
. Set tone control to treble.
. Set band switch to LW, MW, SW or FM.
. Set balance control to center.
. Set function selector to radio.
6. Set fine tuning to center.
7. Set power source voltage to 9V DC.
8. Output of signal generator should be no higher than
necessary to obtain an output reading.
oOhwWND—
m LW, MW, and SW ALIGNMENT
SiO GENERATOR” | napio oa. | ELECTRONS |
ENERATOR
BAND SETTING VOLTMETER | ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY or SCOPE) | |
AM-IF ALIGNMENT
| Fashion loop a : é ; - if : -—
several turns o 455 kHz oint of non- utput meter | : :
(1)| AM | wire and radiate 30% Mod. | interference. (on/| across voice TOME, “| alee Richinesiaym
signal into loop of at 400 Hz. about 600kHz). | coil. | put.
| receiver. | |
LW-RF ALIGNMENT
T T T Fi gee a act eee, = T
L7 (LW OSC Adjust for maximum
| Output meter | . H
” 145 kHz : Coil) output. Adjust L4 by
(2); LW 145 kHz [9.5mme/,")]_ | Bross voice | (#1) L4 (LW moving coil bobbin
. | ANT Coil) along ferrite core.
| apeun | CTS i A sean Adjust for maximum
i Zz ” rimmer output.
(3) iw 285kHZ | 1g0.69mm(33/;,’)] | CT3 uw ANT | Repeat steps (2)
Al L | Trimmer) and (3).
MW-RF-ALIGNMENT
7 ave | L8 (MW OSC Adjust for maximum
Output meter J :
i
550kHz
:
Coil)
output.
Adjust
L5
by
Oy) MS | mobikhlz [aSmmey- | actos voice | (1) LS (MW moving coil bobbin
L : ANT Coil) along ferrite core.
ect
|
CT
IMW
OSC
|
Adjust
for
maximum
7
;
z
"
rimmer
output.
(5)| MW 1,500kHZ | [g0.69mm(32/¢°)] CT4 (MW ANT | Repeat steps (4)
| rimmer) and (5).
1 Ear DUO
(* 1) Cement antenna bobbin with wax after completing alignment.
[ SW-RF ALIGNMENT
| L9 (SW OSC
Output meter H . F
5.9MHz : | Coil Adjust for maximum
y/o DOI theca agMel2 scemmenal || corse vole L6 (SW ANT output.
| eamic capacitor : | Coil) | :
10pF).
:
Adjust
for
maximum
—
|
|
sw_
|
Negative
side
Rein
18MHz
CT8
(SW
ANT
|
output.
to
test
pointy.
[85.34
mm(3#4/3,")]
Trimmer)
Repeat
steps
(6)
| | and (7).
= FM ALIGNMENT
SWEEP GENERATOR © | RADIO DIAL (ELECTRONICS |
WEEP GENERATOR
BAND SETTING VOLTMETER | ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY or SCOPE) j
FM-IF ALIGNMENT
Connect to test Connect vert.
poiney through 10.7MHz Point of non- amp. of scope to Adjust for maximum
(1) FM 0.001 uF. : interference. (on/| test point Y. T1 (FM 1st IFT) | amplitude.
: : (SWP.) :
Negative side to : about 90MHz). Negative side to (Refer to fig. 13.)
test point. test point WY
Adjust for maximum
(2) FM T3 (FM 2nd IFT) | amplitude.
(Refer to fig. 14.)
FM-RF ALIGNMENT |
L3 (FM OSC
Output meter ; ‘
Connect to test SOMHz Coil Adjust for maximum
By
OM
ee
oint
Sy
through
valde
[11.03mm(/,,")
|
267088
voice
L2
(FM
NT,
output.
FM dummy ; Oi
ener
ba:
Tegan?
CT2
(FM
OSC
(*
2)
Adjust
for
maxi-
(4)
EM
p
106MHz
106MHz
Trimmer)
mum
output.
Ww.
[75.81
mm(231/,.’)]
CT1
a
see
a
steps
(3)
|
rimmer and (4
[ (* 2) Three output responses will be present; proper tuning is the center frequency.
VG a4) &
a SEPARATION ALIGNMENT
| —_ cM SIGNAL | EQUIPMENT [To [| | |
ENERATOR CONNECTION PEN tart Ba diunanedon
ITEM BCURGE SECHRONIO ADJUSTMENT | SPECIFICATION REMARKS
CONNECTION | COUNTER
Adjustment of | 98MHz,60dB. | W...(+) Adjust VRi, for 19kHz
:
:
Su
VR
i9kKHz
(+0.1kHz)
reading
on
| pilot signal. | (Mod CW) Soa gee ) ee. ff electronics counter. _
m@ AUDIO ADJUSTMENT
ITEM — INPUT MEAOINT “SPECIFIC [hon sae | REMARKS
Azimuth (kHz, ~20dB) EXTSP Magiinium ouipui. | Azimuth sorew. | Playback mode.
Bias
;
W..
(+)
Record
mode
|
oscillation _—— wi) /0+0.5KHAZ L301 Beat proof switch > |
Frequency. | Tape selector > Metal
UES UG eae) Ore eee *cawBieeden Seales See the 2 stds) (OPE ee ene oC taD
4 Len (+) iVieial.. YEO 10GRA | AeeardiGiede
Bias current Use metai iape 2g aa i Ste ade SULA | vRigs Beat proof switch > |
ee eT x ise a Tape selector > Metal |
@ ALIGNMENT POINTS FM ANT MWANT MW ANT LW ANT
9OMHz S550kHz I500kHz 145kHz 9
rts] [cra] TL |
_——— i a
W CO)
4 a G
FM ANT LW ANT SW ANT MW OSC
BIAS FM ist IO6MHz 285kHz 5.9MHz 550kHz
CURRENT pelle
VRIOS
FM OSC
IO6MHz
[99.900] cT2
aR5
10144201 W
LW Osc MW OSC /SW ANT
285kHz ISOOkHz / 18MHz
(Fig. 12]
[Fig. 13]
[Fig. 14]
RX-F20L