Panasonic RF-B20L - Electrical Parts List; Alignment Points; FM Alignment; FM-IF Alignment

RF-B20L RF-B20L
@ ALIGNMENT POINTS
° SWEEP GENERATOR RADIO DIAL | (ELECTRONICS
SETTING VOLTMETER ADJUSTMENT REMARKS
CONNECTIONS or SCOPE)
Adjust for maximum
(13)
output.
(14) L9 (SW2 ANT Adjust for maximum
Coil) output.
(15) Adjust for maximum
Coil) output.
: Li1 (SW4 ANT Adjust for maximum
co] swe || tr 85 me sah
SW5-RF ALIGNMENT
L12 (SW5 ANT Adjust for maximum
Coil) output.
SW6-RF ALIGNMENT
L1i3 (SW6 ANT Adjust for maximum
Coil) output.
SW Dummy Antenna (For Steps (10)~+(18))
Pee ee ee nr ee 4
Vv : se CT Rn
To Receiver ! sail To SG
vv | 1
ee een ee os | AL 4
@ FM ALIGNMENT
INDICATOR
RADIO DIAL (ELECTRONICS
SETTING VOLTMETER
or SCOPE)
FM-IF ALIGNMENT
Connect vert.
amp. of scope to
test point WY .
Negative side to
test point YW .
Connect to test
point Y through
0.001uF. Negative
side to test point
Point of non-
interference. (on/
about 90MHz)
Adjust for maximum
amplitude.
(Refer to fig. 1.)
iswey” T1 (FM 1st IFT)
” ” ”
Adjust for maximum
T3 (FM 2nd IFT) | amplitude.
(Refer to fig. 2.)
FM-RF ALIGNMENT
Variable Output meter : A ct.
87.5 MHz capacitor across LS (FM oe °4) ic a
fully closed. voice coil. j
Connect to test point Variable es
Wthrough FM dummy | 108 MHz capacitor CT2 aie
antenna. Negative fully open.
side to test point ® . L4(FM ANT
(*4) Adjust for maxi-
‘ CT2—4 (FM ANT mum output.
106 MHz Tune to signal. a Trimmer)
Repeat steps
(+4) Three output responses will be present; proper tuning is the center frequency.
(21)
(22)
(23)
(21)~(24).
Fig. 1 Fig. 2
¢
Please
refer
to
Circuit
Board
and
Wiring
Connection
Diagram
which
is
located
test
point.
SW5 ANT SW2ANT LWOSC SWI-6 IFT SWI ANT FM 2nd FMOSC_ AMIFT
6.075MHZ !0.7MHZ 87.5MHZ 455KHZ
15.35MHZ 7.2OMHZ I36KHZ 1|!.85MHZ
SW6 ANT
17. 725MHZ
SW3 ANT
9.70 MHZ
SW4 ANT
11.85MHZ
LW ANT
285 KHZ
@ REPLACEMENT
PARTS LIST
Q19,20,21,
22,23,24
WIG OSC MW ANT SWI-6 OSC SWIG OSC MWANT FM ANT FM OSC
roe 550KHZ |0.975MHZ 10.425MHZ ISOOKHZ IOGMHZ IO8MHZ
Z]
Fig. 3
ELECTRICAL PARTSLIST a.
INTEGRATED CIRCUITS
RVITA7358P
AN7236S
MN4082BS
MN4043BS
MN4072BS
IC (AF AMP/FM OSC/MIX)
IC (FM/AM IF AMP etc.)
IC (MW/LW/SW/FM Switching)
IC (MW/LW/SW/FM Switching)
IC (MW/LW/SW/FM Switching)
TRANSISTORS
Transistor(MW RF, LW RF)
Transistor (Switching, Buffer,FM IF)
Transistor(RF AMP)
Transistor (1st Mix)
Transistor (ist OSC)
2SK160K5
2SC1009F4
2SK193K
2SK184GR
2SC2295B
2SB709S
2SA812M5
2SC1623L5A
2SC2001K2
2SA952K2
2SB709S
Transistor (Switching)
Transistor(DC AMP)
Transistor (AF AMP, Driver)
Transistor (Power AMP)
Transistor (Power AMP)
Transistor
(MW/LW/SW/FM Switching)
DIODES & RECTIFIERS
MA151WK
MA27A2
LN25RPLF
LN247RPLF
MA153
MA165
RLQY25S5
RLQY30S1
RLQY10G5
RLO4N120
RLO4N162
RLF6B3
RLA3A8
RLA3A9Q
RLA3A11
RLA3A12
RLA3A13
RLQZP100K
RLQZP2R2M
RLQZP150K
RLQZP8R2K
RLO2A10
Diode (MW/LW Switching)
Diode (AGC)
LED (Tuning)
LED (FM/MW/LW/SW Band)
Diode (Protector)
Diode (MW Switching, Stabi)
COILS
Choke Coil
Choke Coil
Choke Coil
Antenna Coil, (FM)
Oscillator Coil, (FM)
Antenna Coil, (MW)
Antenna Coil, (SW1)
Antenna Coil, (SW2)
Antenna Coil, (SW3, SW4)
Antenna Coil, (SW5)
Antenna Coil, (SW6)
Choke Coil
Choke Coil
Choke Coil
Choke Coil
Oscillator Coil, (MW)
RLO1A3 Oscillator Coil, (LW)
Oscillator Coil, (SW 2nd Local)
RLO3A10
RLQZG102K Choke Coil
TRANSFORMERS
RLI4A4 IFT (FM IF, SW IF)
RLI2A8 IFT (MW IF)
VARIABLE CAPACITORS
RCV3YC4VN Variable Capacitor
LW ANT
150 KHZ
...For All European areas
except United Kingdom
& Germany.
For United Kingdom.
with Trimmer (LW/SW)
RCV4LC4V1N Variable Capacitor
with Trimmer (FM/MW)
TRIMMER CONDENSER
RCVCTZ3110 =‘ Trimmer Capacitor (SW)
VARIABLE RESISTORS
EVUJ05T02A14 Tone/Volume Control VR 10 kQ (A)
RESONATORS
RVCC16775NRN Crystal(SW1)
RVCC17900NRN Crystal (SW2)
RVCC20400NRN Crystal (SW3)
RVCC22550NRN Crystal (SW4)
RVCC26050NRN Crystal (SW5)
RVCC28425NRN Crystal (SW6)
CERAMIC FILTERS
RVF107NAR
Ceramic Filter (FM)
RVFSFP455G5_ Ceramic Filter (MW)
RVFSFP462G5_ Ceramic Filter (MW)
RVF107SM1
FILTER
Ceramic Filter (SW)
RXABPMB6A Component Combinations
SWITCHES
RSS6B02Z
Selector)
RSS2D11Z
RSH1A48Y
RSS2A37Z
RSH1A28Z
JACKS
Jack (DC IN)
Jack (Earphone)
RJJ1B1Z
RJJ1D3Y
Slide Switch (SW1~6 Band
Slide Switch (DX/Local Sens)
Push Switch (Band Selector)
Slide Switch (Hold)
Push Switch (Power OFF)