McIntosh MA-6100 Sevice Bulletin

S.B.

SERVICE BULLETIN

WIRING CHANGE

MODEL: MA 6100 Preamp-Amplifier

PURPOSE OF MODIFICATION: To correct wiring error in compensation

and tone controls.

WHAT UNITS ARE AFFECTED: Serial No. AE1001 to AE1184

WHEN MODIFICATION SHOULD BE MADE: Any time any other service

is performed.

MA 6100

No. 1

MclNTOSH MODIFICATION KIT NO.: None

PARTS REQUIRED: None

PROCEDURE: (Refer to the diagram on reverse side)

Step 1 Remove dust cover, knobs & front panel.

Step 2 Interchange the orange and orange/white

wires connected to the tone control PC Board.

Step 3 Interchange the brown and brown/white

wires connected to the tone control PC Board.

Step 4 Remove 4 screws from upper section of sub

panel and interchange the green and green/white

wires connected to the volume control (R21O).

Step 5 Replace upper section of sub panel making sure

to use the hex head screws in the top holes

and the pan head screws in the lower holes .

Rep lace front panel, knobs and dust cover.

BE042003

Mclntosh Laboratory Incorporated 2 Chambers Street Binghamton, New York 13903 Phone: Area Code 607-723-3512

BOARD
PC

R2IO

VOLUME

TONE CONTROL

CONTROL

VIEW

TOP

3

STEP

REMOVED

COVER

2

DUST

STEP

ORANGE

BROWN

BROWN-WHITE

ORANGE-WHITE

PANEL

SUB

UNIT

UPPER

OF

FRONT