EFJohnson 7780 service manual KEY Board Schematic, S S R R R R

SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS

MC1

Microphone

R1

C1

33K

33P

C2

33P

SP1

C3

Speaker

33P

C4

33P

R2

R3

R4

R5

100K

100K

100K

100K

HC5

S13

C

1

S1

2

S2

3

S3

F1

S14

4

S4

5

S5

6

S6

F2

S15

7

S7

8

S8

9

S9

F3

HC6

HC7

C

C

HC1

HC2

HC3

HC4

C

*

S10

C

0

S11

C

#

S12

C

G K K K K K K K K G

N E E E E E E E E N

D Y Y Y Y Y Y Y Y D

S S S S R R R R

HC8

0 1 2 3 0 1 2 3

C

R12

Q1

10K

2SA1576

C5

2 1 1 1 1 1 8 6 4 2

J1

33P

AXN720535

0 8 6 4 2 0

1 1 1 1 1

R10

R11

9 7 5 3 1 9 7 5 3 1

120

120

HC11

DS2

HC9

DS4

S S G G + B G G M M

C

C

C

C

LN1371G-(TR)

LN1371G-(TR)

P P N N 5 K N N I I

HC10

HC12

E

D D L L D D C C

E

E

DS1

DS3

D

LN1371G-(TR)

LN1371G-(TR)

10-KEY BOARD SCHEMATIC

	November 1999
8-11	Part No. 001-7780-500