5-37
Electrical Information
Real-Time Clock (RTC) Battery Information
The following section contains information on the real-time clock battery.
Battery Specifications
Table 5-30 summarizes the RTC battery specifications.
WARNING:
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacturer’s instructions.
Video Output Signal Specifications
The following input signal specifications are typical for all HP monitors:
•
Output connector - 15-pin MDSM
•
Impedance - 75 ohms Signal levels -
•
Signal levels follow EIA standard RS-343A; white is positive. The composite sync is sup-
plied on the green signal only. Horizontal sync pulses do not need to be supplied during
the vertical sync pulse. However, the 75 Hz VESA-standard timing should use separate
TTL horizontal and vertical syncs. Sync-on-green should not be supplied simultaneously
with the separate syncs.
Video Timing Specifications
This section contains information on video timing specifications. These specifications are not
the output timing specifications for any particular graphics option. They are the input specifi-
cations for Hewlett-Packard monitors.
Table 5-30
RTC Battery Specifications
Type
Voltage
Manufacturer
Manufacturer
Part No
HP Part No.
Battery
Life
Power Off
Battery
Life
Power
On
Lithium
3 Vdc
Panasonic (743)
RAYOVAC
(744)
BR-1616 (743)
BR-1225 (744)
1420-0525 (743)
1420-0541 (744)
.5 Yr (743)
1 Yr (744)
10
Years
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