Brother International MD-817 Service Manual - Page 55

C

CONTROL

BOX

TROUBLESHOOTING

GUIDE

DETAILS

')

(1)

(2)

(

3

)

For

other

than

the

control

box,

it

is

particularly

important

to

use

products

of

confirmed

good

quality.

Do

not

use

an

extension

cord

for

the

motor's

6

-pin

cord.

Extension

cords

can

be

used,

however,

for

other

cords.

About

the

power

supply

of

the

PCB

BPD600.

•

The

PCB

BPD600

is

divided

into

three

power

-supply

groups

(part

A,

part

B

and

part

C).

•

Although

part

A

(OV

group)

is

insulated

at

the

transformer,

part

B

(OBV

group)

and

part

C

(OCV

group)

are

high

-voltage

circuits

(primary

side

voltage)

due

to

the

CN5

and

CN4

connections,

and

so

are

dangerous.

•

For

that

reason,

it

is

extremely

important,

before

checking

part

B

(OBV

group)

and

part

C

(OCV

group),

to

be

absolutely

sure

to

first

disconnect

CN5

and

CN4.

Also

disconnect

the

motor

connector

(which

is

among

the

external

connectors).

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BC

TR3

TR2

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TR6

TPA

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TR5

TR1

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-

51

-

Brother International MD-817 Service Manual - Page 55

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