IBM 3278 Series Maintenance Information page 8

Safety Notices
I
DANGER,
I DANGER:
I
DANGER:
I
DANGER:
I
DANGER,
All power unit removal and
replacement procedures must be
performed with power turned off and
with the power cord disconnected.
All persons handling a CRT or who
are near an exposed CRT under
vacuum must wear safety glasses and
long-sleeved garments.
High voltage can be present when
Indicator 2 is off.
Safety glasses must be worn when you
are working on the machine with
power on or off.
Voltages are present in the heat sinks
on the analog card when the power is
on. Also, be careful when removing
this card because the heat sinks will
be hot (at high temperatures).
I
DANGER: Ferrocapacitor 01D/Cl is grounded
only when the capacitor is retained by
its mounting spring.
The machine frame is grounded only
when the prime power assembly
010/ A 1 is mounted and fastened in
place.
The ferrotransformer assembly 01D/T1
is grounded only when it is mounted
and fastened in place.
Caution: The CRT weighs about 7.25 kg (16 pounds).
Protect and support the CRT when removing and
replacing it to prevent damage to the CRT and other
units.
Caution: The 3278 must be off before cards and
cables are reseated or swapped. Be careful not to
loosen cards or cables when working on the 3278.
This could cause intermittent failures then or at a
later time.
Caution: The indicator above the ON/OFF switch is
not a primary Power On indicator. Machine voltage
may be present when this indicator is off.
Caution: Do not connect or disconnect the device
cables during an electrical storm.
viii
SY27·2510-6