Panasonic RF-542

mRemove
the
PC.
Board
(Fig.
3)
1.Remove the Socket (C)x1
2.
Pull
out
the
PC
Board
with
a
driver
in
the
direction
of
arrow
(D)
as
shown
in
(Fig.
3)
3. Remove screws (E) (8x12)mm xX 3
Notes:
_
Set
the
variable
capacitor
to
minimum
position.
_
Turn
the
tuning
knob
clockwise
until
reaching
end
scale
position.
|
.
Before
inserting
the
radio
PWB
into
the
rear
cabinet
be
(C)
sure
to
insert
completely
the
variable
capacitor
shaft
into
the
tuning
knob
cabity.
(E
[Z]
-:-For
all
European
areas
except
[ZE]
[Z1]
[ZG]
[ZY]
[ZE]---For
United
Kingdom.
[Z|]
---For
Italy.
Fig.
3
[ZG]---For
F.
R.
Germany.
[ZY]:--For
Spain
and
Greece.
@ ALIGNMENT POINTS
°
Please
refer
to
Circuit
Boara
and
Wiring
Connection
Diagram
to
locate
the
test
points.
AM
ANT
(1628kHz---
Sar
ac
SEOks
|
(21)
(26)
Only)
LTA)
19
a
anH2
511kHz
(87.3MHz:---
(Z1}
(ZG)
Only)
(Z!) (ZG) Only)
| D | ~ (470kHz---
(ZE) Only)
FM 2nd
10.7MHz
AM ANT AM OSC
1500kHz 1650kHz
cra FM ANT.
106MHz
FM ANT
90MHz
AM
2nd
CT1 455kHz
FM OSC (470kHz:::
109.3MHz
(ZE}
Only)
(108.3MHz---
(ZI) (ZG) Only)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
MEASUREMENTS AND ADJUSTMENTS
@ ALIGNMENT INSTRUCTIONS
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
Notes:
1. Set volume control to maximum.
2. Set band switch to AM or FM.
3. Set power source voltage to 6 volts DC.
4. Output of signal generator should be no higher than
necessary to obtain an output reading.
INDICATOR
ADJUSTMENT REMARKS
T3 (AM 1st IFT) ‘Adjust or
T4
(AM
2nd
IFT)
maximum
output.
SIGNAL GENERATOR or
SWEEP
GENERATOR
RADIO
DIAL
|
(ELECTRONICS
SETTING
VOLTMETER
or
(DISTANCE)
|
SCOPE)
AM-IF & RF ALIGNMENT
Point of non-
interference.
(on/about
600 kHz)
CONNECTIONS FREQUENCY
Fashion loop or 455kHz
Several turns of wire (470kHz:-:-
and radiate signal --[ZE] only)
into loop of receiver. 30% Mod
at 400Hz
511kHz Tuning
” (S14kHz ---- capacitor "
(Z!] [ZG] only) | fully closed.
1650 kHz Tuning
" (1628kHz-:-- capacitor i,
[Z1] [ZG] only) | fully open.
es Adjust for maximum
; *1)L1 (AM output. Adjust Ll by
" 550 kHz Tune to signal. ” ANT Coil) | moving coil bobbin
along ferrite core.
Adjust for maximum
” 1500 kHz Tune to signal. " oe aes output.
Repeat steps (2)~(5)
(*1) Cement antenna bobbin with wax after completing alignment.
. Connect vert.
Pea amp. of scope to Adjust for maximum
10.7 MHz | (on/about point 7 T1 (FM 1st IFT) | amplitude.
90 MHz) Negative side to (Refer to fig. 1).
; point WY
Adjust for maximum
” ” ” ” T2 (FM 2nd IFT) amplitude.
: (Refer to fig. 2).
Connect point W
Output meter
across
voice coil.
CT3 (AM OSC .
Trimmer)
High. side thru.
0.001uF to point
Negative side to
point Vv
86.2MHz
through FM dummy Tuning . 2
antenna
Negative
side
(87.3MHz
capacitor
Output
meter
_
L4
(FM
OSC
Goil)
(*2)
Adjust
for
maxi-
(ZI)
(ZG)-:-
fully
closcd.
across
voice
coil
mum
output.
Only)
109.3 MHz
(108.3MHz
(ZI (ZG)---
Tuning
capacitor
fully open.
CT1 (FM OSC
| Trimmer)
Adjust for maximum
output.
Repeat steps (8)~(11).
to point Vv
WwW
“1
Ww
Only) poe
(*2) Three output responses will be present; proper tuning is the center frequency.
CT2 (FM ANT
Trimmer)
Fig. 1 Fig. 2