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RX-F20L
Notes:
1. $1-1~S1-10...Record/playback switch in "playback"
position. (1...Playback, 3...Record).
2. S$2-1~S2-4
...Function switch in '"TAPE" position.
(1... TAPE, 2...RADIO, 3...SLEEP).
3. S3-1%S3-4
...Mode/beat proof switch in ""AMBIENCE/III"'
position.
(1...MONO/1, 2...STEREO/I;
3... AMBIENCE/III).
4. S4-1~S4-4
... Tape selector switch in "NORMAL"
position. (1...NORMAL, 2...CrO,, 3... METAL).
5. S5-1~S5-8
...Band switch in "FM" position.
(1...FM, 2...LW, 3...MW, 4...SW).
6. S6-1,S6-2
...Rec mute ON/OFF switch in "OFF"
position.
TEAST
phew iene TPS switch.
8. S8-1~S8-4
...DIN "ON/OFF" switch in "OFF" position.
(1...ON, 3...OFF).
O25S9)
sam. Ytes Play ON/OFF switch in "OFF" position.
10. S10 oo... Motor ON/OFF switch in "OFF" position.
14. S11
auc
FF, Rewind ON/OFF switch in "OFF"
position.
12. VR1.....
ee VCO oscillator frequency adjustment VR.
13. VR101
......... Balance control VR.
14. VR102 ......... Tone control VR.
15. VR103 ......... Volume control VR.
16. VR105......... Bias current adjustment VR.
17. The mark (W) shows test point e.g. W=test point 1.
18. DC voltage measurement are taken with electronics
voltmeter from negative terminal of battery.
<
>...FM position, (
)...AM position,
<
>...TPS, position, [
]...Record position.
19. Battery current: No Signal
............:s
cece eee ee eee e ees 96mA
Maximum output (radio) .......... 700mA
Maximum output (tape)
.......... 840mA
Anode
Q1%6, 101~108,
201208, 301,
303, 304,
306308
Jee
D1, 2, 101~ 103,
201203, 301303,
305, 309, 318
Cathode
D304, 311
C1
AN7220B
IC4 AN7146M
RX-F20L
RX-F20L
SCHEMATIC DIAGRAM MODEL RX
Ql
a2
D3
D2
DI
Q3
ICI
Q5
Q6
a4
2SA1254
2SA1254
MVI2I|
MA345
MAI65
2SC2206
AN7220
2SD636
2SB64|
2SD636
R
ee
FM RF AMP
FM OSC/MIX
AOC
AFC
AGC
IF AMP
FM/AM IF AMP AM OSC
TUNING AMP
TUNING AMP
AF AMP
v
CoIBP
2)
(2 756
VR
IOK(B)-
>
da)
a4)
41> a>
C46,
0.022
FINE
TUNING:
#
2
S R103
(5K
CP2
R/p HEAD
Vaow
2
'a
"
As
C1209;
00!
R31016,
RO.
0.001
Capg0.oor
|
aa &
216
EXT MIC
Lch
J101
0.25mV
200~6000
Lch
504.7)
R257
3.31
'
oO ae
Nh
EXT MIC
Rio 10K
R ch
————
10K
J20t
O25mV
Se
u
8-3
O
O
o
2
3
(200~600.2)
E HEAD
Se-4
|
DIO!I, 201
DI02,202
DIO3,203,303,318
Ic4
O
MAI65
MAI50
MAI65
0309
0305
e ya.
as
ae
Ld ere
oe
MAIO56
MAI65
DIN
IN :027mV/27KQ. QUT:
420mv/470KQ
AOC
SWITCHING
D301
D302
Qlol, 201
Q102,202
Q103,203
Q30!
Q302
Q104,105
, 204,205
DIO6 , 206
Q107,108
,207, 208
Q303
MAI50
MAI65
2S0636
2SD636
2SD636
2SD636
2SCI583
2SD636
2SD636
2SD636
2SD636
SWITCHING
SWITCHING
EQ
AMP
SWITCHING
REC
AMP
AGC
AGC
PRE
AMP
AMBIENCE
AMP
MUT ING
TPS
AMP
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