Operating Requirements

All machines have two power on switches: one on the system unit (Media Console for Type 2142) and one on the display. Some high voltage machines (180–259 V ac) might have a power cord from the display to the

system unit and a non-switched appliance connector.

MM55

(Type

2116)

and MM75 (Type 2168) monitors have universal

auto

 

 

 

sensing

power

supplies.

 

 

 

 

 

 

 

 

 

 

 

When

the

system

unit is powered off for 10 seconds

or

more

and

then

powered

on,

 

the

power supply

generates

a “power

good”

signal

that

resets

the

system

logic.

 

 

 

 

 

 

 

 

 

 

 

 

Note:

 

Whether

or

not

Power

Management

is

enabled,

the

on/off switch

 

on

the system unitdoes not completely power-off the power supply. Also, the

 

 

appliance

outlet

connector is always powered on when the

system unit

is

plugged

into

 

an

electrical outlet. See “Power Management” on

page 1-21

 

for

more

information.

 

 

 

 

 

 

 

 

 

 

 

 

A Note

About Energy Saver Monitors

 

 

 

 

 

 

 

 

 

 

 

 

Monitors rated as “Energy Saver” models use less than

30

W

when

 

 

 

operating in the energy-saving mode or when the system

 

unit

is

 

 

 

powered

off.

 

 

 

 

 

 

 

 

 

 

 

 

 

To

 

extend

monitor

life,

the

monitor

should be

powered

off

at

the end of

 

each

day.

 

 

 

 

 

 

 

 

 

 

 

 

 

Special Tools

The following special tools are required to service this system:

A meter similar to

the Triplett Model 310 (P/N 9900167)

Wrap

plug, P/N

72X8546

Video

memory

removal

tool, P/N 9900764

1-30

Page 56
Image 56
IBM 2142, 2140 manual Operating Requirements, Special Tools