Display - IBM 7785 Hardware Maintenance

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Following is the list of outlets on the enclosure:
• Six power
outlets:
Generai lnformation
- Two CPU power supply outlets with a maximum load of 5
Amperes each.
- One sense outlet used as a switch for the other outlets (3
Amperes, maximum load). This outlet requires a minimum
load of 4.8 watts to power-on the remaining outlets.
- Three auxiliary outlets with a maximum load of 2 Amperes
each.
• Two telephone jacks:
- One RJ11 C for connecting into the telephone line (phone).
-
One RJ11 C for connecting into a modem (modem)
.
• One serial
port:
- A 25-pin
,
D-shell
connector.
A green light on the rear panel indicates when the unit has power
available and is ready for operation
.
This light blinks after an
automatic-on condition (phone activation or remote-on command)
has occurred
.
The system returns to a steady-on condition when the
display is powered on
.
This light is used as a visual indication that
an automatic-on condition occurred
.
Display
The display used for the Service Bay System is a hardened
, 19-inch,
monochrome unit. lt has a power switch
,
a power-on
indicator,
and
controls for brightness and
contrast,
which are located on the front of
the
display.
The display power switch and the power-sensing circuit
of the Power Distribution Control Box control power application to the
system
.
This display has the following features
:
• Self-test with a white screen test pattern
• 1600 x 1200 pels (pi"cture elements) of addressability
• Analog video input that allows infinite shades of gray
• 31.48-
, 34.61-,
or 34.65kHz horizontal synchronization rate
• 1.8 m (6 ft) attached signal cable with a 15-pin, D-shell connector
• 1.8 m (6 ft) detachable power cord
.
SECTION 1. Generai lnformation
9

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