McIntosh C20 MAINTENANCE GUIDE

MAINTENANCE

MANUAL

C20

STEREO PREAMPLIFIER

(Serial No. 6L700 & above)

from

DESCRIPTION

your amplifier.
for

NO. and

number

SCHEMATIC

model

the

and

give
to

serial
and

sure
be

below,
2

parts

order

Table

SC119-201)

COMPONENTS

Selector

DESCRIPTION

Input

Switch,

NO.

S1

COMPONENT

Filter

1.6A

Cutoff

50 PIV at

Frequency

Switch, Rumble Filter

S5

Tape Compare

Switch, Mode Selector

Switch,

S6S7S8

Switch, Tape Jack

High

Switch, Treble Compensator

Switch,

Switch, Bass Compensator

S3

S4

S2

Power

Switch, Phase

Silicon Rectifier,

Transformer,

S9

S1, S2

M199A

No.

you

pur-

SPECIAL

compo-

These

below.

listed

in the C20 are

2.
(Schematic

Table

may be

power
with

15/15V

300/350/350V

350/350V

MF at

C20. They

MF at

combined

MF at

for the

DESCRIPTION

20/20/40

1000/1000

40/40

Section
— 4

Loudness (Aural Compensator)

rear panel
on

Bass)
(Lo

Trim

switch

Capacitor,

built specifically

Filter Capacitor,

Filter

Filter Capacitor,

Control, Treble

Control, Bass

on-off

Control,

Control, Volume

Control, Balance

Control, Bass

and

NO.

R5

used)

R7 (2

designed

components used

directly from Customer Service, Mclntosh Laboratory Inc. When

are

Special

nents

chased

C102

C103

COMPONENT

R2

R 3

R1

C104

R4