icf 7601 schematic l

2-5

SCHEMATIC DIAGRAM (ICF-7601)

1

ANT I FM/SW

TELESCOPIC ANTENNA

ICF-7601/7601L

8

[MAIN BOARD]

Q1

2SK238-K16

SW2-I0 RF AMP

Q2

2SK508-K5I

SW2-IO ist MIX

Q3

2SK209-Y

SW2-IO 2nd MIX

D12

1SS279

B

L2 SW2 L3 SW3 L4 SW4 L5 SW5 L6 SW6 L7 SW7 L8 SW8 L9 SW9 LIO SWIO

cr

-nr

si    1SS279

1 sw band|

R2

S1-1

1 k

0 Ql

LII

68aH

0.02 10.02)

.^Ma LI 2 'B 6. 8aH

£0.01

**(0.01)

Tl SW2-I0 IST IF RIO ------470

T2

SW2-10 2ND IF

r------■»

■±"

D6

ISSU8T

T3 MWIF

ii?! ⁰⁹⁸ ,p

L2flL3 LA L5 L6 L7 L8,

C4

0.022p

B

02 o

■=* o

R8

lOk

1SS279

CF1-1 10. 7MHz

C12 0.01* B

0.02

(0.021

<5.88>a_

0.02

(0.02)

0.33>

D7 1SS148

455kHz

455kHz

CF1-2

SW2-I0 IST IF

_n,    Ct A

Qo o.OlM 2SC2223-F13 B

SW2-I0 Ist OSC

CIS

o.ou

B

Cl6 R15 0.Ot a A7k B

C18

o.oi a:

B

47k

DA 1SS279

C19 330/i 6. 3V

W

0.76 Q4

D

R20 91 k

RI7

82k

5.82

0.39

D8

1SS148

SI “2

X8

R26 47k —Wr

■Wr

Q7

2SC2223-F13 m-\Q ŁnLflSŁ

\

XA    28. 525MHl

X2 20.AMHz X6 16.8MHz    2A. A5MHz

CZD CZU

R21

200k

R23

2.4k

R2A

220k

XI    X5

5.6MHz X3 22.55MHz X7

17.9MHz    26.025MHz

X9

32.35MHz

C2A -L R27 -r    1 00p

SL

C22 _roq 1 220pC25.

Toi oor

^bL SL

1 k

G4    ............

2SC1623-L6 Q5 2SC1623-L6 Q8 2SK238-KI6 Q9 2SK209-Y

AGC

SWt RF AMP

SWI MlX

FERRITE-ROD R33^ ANTENNA

SWI —

.L15_.__11

C3A 220p SL

C33 0.01* -J- B

CA 1 1QPa 6. 3V +

CAO

0.01*

^{3    0} n

SWLO ^D

Z' SW I • 4.92

R36 10Ok

C37    _

0. 0A7a -r

^B i

C36

0.01 lOO n

k). 047a ^a B

CA3

lOk -1-0.0 1* -LO.OU B TB

'09

O

SWI-0.42 R37

D9 ISS279

C38 . 0A7a B

Dl O 1SS279

CA5

0.01 a B

SW I OSC

G

021

2SCI623-L6

SWITCHING

LI 6

CA7

2 2 p

RH

J -2*

CV2-2

H

D22 RDIIESi -Tl 02 *

C51 A70p “ SL

+4-

Dl 6 1SS148

S2 HOŁD

Q2l

$ RA5 I 470k

5.44 0.08

(5.43

<5.5rt

O

A

—Wr

R73

47k

S3

SWI

<7^0-

SA

-<^0

[ S W 2-10

S5

MWI

S6

FM

S7

-cr^o

POWER OFF

0.02 0.02 ⁽0.02⁾c27^°₄²'100k <1.38)91 p<²-^4o> CV2-3 "TR-'x

H

R28 \220

^ 0.02 (0.02)

<5.33) C26

—0. 01 ii

T B

^ 0.02 (0.03) <0.3>

\

HO

LIA SW2-I0 2ND OSC

CTA

R29

R30 3. 9k

Cii

lOp I6V

C28 ±

C29 91 p Cl

~ZW

220p CH

IQ7

C32 0.0lji

0

101

i<0.86>

R31^;

}k

L2I 0.1 jH ■C99 39 Op

TA SWI IF 455kHz

■AW-

RAI 150

Dl 1

1SSU8

CAA

R4A 100

-W—¹

O C49 +

RA j \ 2. 2k \

I2_ jl o SW i • 1 Oa ^LU ^3.49 16V

T3T

IC)

4O>

" O

SWI: 4.81

C50 0.01*

LL J*, 3

O

SWI* 3.07

Q10 2SC2223-F13 sw i osc

Q18

DTA144TK

B+ SWITCHING

Q18

O

(0.02)

C5.87)

R78

330

D17

1SSI48

?

■SW2-

10:0

537

O

(5.42)

O

SWI'.5.34

VDD ALL AMO MCR QND LSO FMO SWO MWO LWO

IC2 ^PD65005C SEIECTER

LWI MTO TST SWI VDD MWI FM I OFF RST GND

5.44

5.44

O

O

RA6

ma*

C52

0.01*

B -L

C53

0. 01A

C5A 0. 01 A

C55 , O.OU 1 B 1

-łh

5.4

(5.4)

<0>

IC2

\ Q20

0.89

0.88 (0.89) f <0.89)

5.28 (5.28) < 5.28 > RA8 /

019

5.99

(6)

> <5.99)

R75

180k

022

C56,

<X0ljJ tLC57 (5-42)    _rqfi

B _T Ig<5.49>    +1 ₀C58^

^50V    £ 50V

-AW—

RA7 A7k

MW

SWI

SWMO

FM

Dl 9	^r D20
ISR506D	SR506D
(S3)	(S4)

D2I SR506D (S6)

RA9 3. 9k

Q20    Q22    Q19

DTA144TK 2SC1623-L6 2SB815-B7

MUTING RESET SWITCH 8+ SWITCHING