Panasonic RF-B45 Service Manual

RF-B45 RF-B45
lm TERMINAL GUIDE OF IC’S, TRANSISTORS AND DIODES lm MEASUREMENTS AND ADJUSTMENTS
AN7205 READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
Set power source voitage to 6 V DC. ¢Set tone select switch to HIGH.
Set sensitivity select switch to DX. Set volume control to center.
Set AM mode select switch to NOR/FIX.
SB80734ANDYT1
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UPD1724GB561
BA10393FT
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EQUIPMENT REQUIRED
Frequency counter ®DC digital voltmenter iF monitor scope
2SB709RTW 2SK160K4TW Ampere meter *Oscilloscope
28C2404CTW 2SK160K5TW . Signal generator (FM/AM) eFM/AM IF sweep generator
c D601RTW 2SK436A21TW
O
AVIDTOT4YRW
RS
BATTERY
CURRENT
CHECK
B
:
6
€ FREQUENCY
:
KD
DISPLAY
SETTING
REMARKS
D
1. Power switch to OFF.
2. Check for less than 50 pA. (for back-up current check)
1. Power switch to ON.
87.50 MHz 2. Volume control to minimum.
3. Check for tess than 70 mA.
2SK238K16TW MA165TA OASOA-M
MA7OOTA
RVD1SS135TA
SS | "Fe
MA724TW
MA4120MTA
MA151KTW
Co
&
cs ae Tae ae Cathode A
Cathode
B A
Anode Anode I
Zathode
Anode
1. Power switch to ON.
1620 kHz 2. Volume control to minimum.
3. Check for less than 80 mA.
MA701TW RVDSVC203ATW 1MN11T110 LN376GC PX-23
Cotnade
eB arose | Anod
nove AY: anoe | ANCL? carnode
Anode
cathode a—@~ ceo
MA729TW
Anode Cathode a Cathode
SS
mab
Anode
ra
Cothode
A
eFM AND AM (SW) VCO ALIGNMENT
FREQUENCY DC DIGITAL :
Cathode
Cathode
Anode
Ano
Fin be Function Pip | Mark ve Functior
No. Division No. Division ”
1 ‘ Device select signal input >
Output terminals for LCD t 5
Hl 0 jerals si seamen 29 terminal. Set the terminal high to is
10 , select adevice and low to deselect : Connect to
1 = ———- coe Point of noninterference. me) Pt. e Adjust VR3 for 55386+0.1 kHz reading on frequency counter.
12 30 Terminal used for connecting a ' ——- (-)
} ‘ ro) Output terminals for LCD common quartz osillator. ; i...
) signals.
14
COMi
as
xi
'
Connects
a
75
kHz
quartz
Connect
to
15 Vv oscillator. . F through 10 pf. Assure that the frequency control's reading is variable by
= Reference voltage setting Point of noninterlerence: “(4) rotating the frequency contro! (VR2).
16617] CAP1+2 — capacitor connected terminals tor 32 vss4 — Terminal used for connecting a .
LCD. capacitor for regulator circuit.
+
18
|
vsse
.
a
ee
@SSB
RESTORATION
FREQUENCY
(B.F.0.)
CHECK
19 VDP fe) Variable duty port. 2 4 bit I/O port.
be ee
20 CGP te] Clock generator port.
21 +— NC 4 bit Output port.
Point of : 1. Set AM mode select switch to SSB position.
22
vob
'
A
voltage
of
1.8~3.6
V
supply
to
ne
2.
Assure
that
the
frequency
counter's
reading
is
459+
1
kHz.
this terminal. Output terminals for key signals.
fe FM IF CHECK
23
VHF
—
—S
IF
SWEEP
jeanne
input
terminal
for
the
FM
local
;
GENERATOR
FREQUENCY
iF
MONITOR
24 HF 1 sllator (VCO) si Input terminals for key retum, BAND DISPLAY SCOPE or REMARKS
Seetiator VCO) sional. signals SETTING | OSCILLOSCOPE
. CONNECTIONS FREQUENCY
25 AMIN —
a
26 vss1_ | | Ground terminal. st coe 10.7 MHz hho (a) Assure that the waveform shown in Fig. 3
ra
EQ.
i
o—
)
;
0
Output
terminals
for
LCD
segment
400
Hz
oniabout
re
(-)
appears
in
the
IF
monitor
scope
or
:
sé
|
tcp1
signals.
30%
Mod.
(
)
i...
oscilloscope.
28 coz | 0 PLL error output termina’. 90 MHz
—15—

Panasonic RF-B45 Specifications

General

Brand	Panasonic
Model	RF-B45
Category	Receiver
Language	English