Power Indication - Nagra Seven Operating Instructions Manual

Fuses
The power supply board is mounted on the rear panel board and is accessible in the bottom of the recorder by
removing the lower panel. There are 2 fuses F1 and F2 in the external power line and battery power line
respectively. These fuses are of the OMF 63 type and manufactured by Schulter and do not require soldering.
Replacement fuses are available through your Nagra agent.
Replacement fuses part number:
F1 & F2 # 54 82001 500
Mains power unit
The N7-PSU (KSA# 20 19180 020) external mains power unit supplied with the Nagra Seven is a 100 - 240V
50/60Hz supply with a rated output of 15V 2A.
The Nagra Seven can be operated while the mains power is connected to the battery box on the rear of the
machine without danger, and it will supply enough energy to power the recorder and recharge the attached
pack at the same time.

Power indication

The top line of the main display shows a "fuel gauge" type charge indication of a battery at all times. Different
indications show the various status positions of the batteries:
When the background of the fuel display turns RED this indicates that there is approximately 10 minutes of
power remaining.
When the curved "flash" is present, this indicates that external DC power is present on the dc connector of the
battery box
- Battery full
- Half-full battery
- Battery pack almost exhausted (Icon will flash)
- External Mains power connected to the battery box (charging)
Note: All times and durations indicated in this section assume that the phantom powering is OFF and that
options such as WiFi are not in use. In addition it is assumed that the battery elements are in good
condition and are fully charged.
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