Service manual

ManualsBrandsMoog ManualsMusical equipment300A

adjusting

screws

pass

or

at

the

end

of

the

rod

if

the

No.

6

screw

touches

the

nylon.

Repair

these

shorts

by

sticking

a

small

piece

of

Scotch

No.

156

2

mil

mylar

tape over

the

area

of

the

short.

Burn

a

hole

in

the

tape

with

a

soldering

iron

for

the

adjusting

screw.

If

the

nylon

is

frayed,

look

for

a strand

touching

either

end

of

the

buss

bar

caus

ing

a

short

circuit.

Repair

this

by

burning

off

the

strand

with

a

soldering

iron.

6.3.4

OTHER

DIFFICULTIES

If

one,

several

or

all

of

the

keys

are

inoperative,

make

certain

the

wiring

harness

is

not

pushed

into

the

key

contacts.

In

addition,

check

for

a

strand

of

frayed

conductive

nylon

contacting

the

key

switches

causing

nonf

unctioning

or

crazy

operation.

If

when

bending

pitch,

the

pitch

drifts

down

at

an

objec

tionable

rate

while

the

key

is

pressed

down

fully,

replace

IC402.

(IC402

is

a

factory

selected

part

requiring

a

CA3080

with

low

output

leakage.

Try

several

CA3080s

until

one

with

the

proper

charac

teristics

is

located.)

Sometimes

the

audio

output

may

die

out

completely

when

a

key

is

pressed

down

hard.

This

trouble

may

be

caused

by

one

of

the

5

mounting

studs

contacting

the

top

of a

socketed

CA3080

metal

can

on

the

main

board.

If

this

occurs,

shorten

the

CA3080

leads,

studs

or

both

as

required.

36