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CONTROL PANEL / OUTLETS / BASIC OPERATION
1. AC Power Inlet
Connects to the AC power cable. The AC input is 115 volts, 60 Hz. The unit is voltage
stabilized to provide 1/20-stop full power repeatability with AC line voltage fluctuations of 20
volts (105-125 volts).
2. Power Switch
Switches the AC power on/off. A memory circuit retains the output settings when the unit is
switched back on or when the AC power is interrupted.
3. Modeling Lamp
Depress the pushbutton switch to toggle between the three modeling lamp modes:
FULL - The modeling lamp is at full brightness regardless of the flash power setting.
RATIO - The modeling lamp will automatically ratio (track) with the flash power
setting.
OFF - The modeling lamp is off (indicated by both the Full and Ratio LED’s off).
TRIM- The Modeling lamps can be trimmed without losing ratio if they are too bright
or too dim in their default setting.
4. TEST Button/Ready Light
The unit can be flashed by depressing the TEST button. When changing power levels, power
can be discharged through the flashtube instantly with this button instead of waiting for the
power to be bled through the discharge resistor of the internal circuitry. The switch
illuminates when the Power Supply has recharged to full power.
5. SYNC Outlets
The camera connects to this outlet via the R4158 Sync Extension Cord (included).
Note: Proper polarity is important with cameras that utilize grounded shutter switch circuits
(cameras that utilize PC cords). If the unit does not flash on initial set-up the polarity may be
reversed. To achieve the correct polarity – Reverse the camera sync cord at the point where it
joins the Sync Extension Cord. This establishes a common ground between the camera body
and the flash unit. If the polarity is incorrect the unit could self-flash or flash intermittently.
6. Photo Eye (Slave)
Permits remote triggering from other flash units. The Photo Eye can be enabled/ disabled by
pushing the photo eye button. (When the button is illuminated the photo-eye is enabled).
7. RESET 15 Amp Circuit Breaker
Automatically protects the flash circuit against excessive overloads. When activated, it will
pop out about ¼” and the unit will become inoperative. To reset, wait at least 30 seconds and
depress the RESET button. If the circuit breaker continues to activate, consult the factory or
your authorized Norman service center.
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8. Power Trim Knob
Adjusts the flash output from full to –5 f-stops in 1/10 increment settings. In combine mode
either power trim knob will change the output level of the entire pack.
9. Flash Verification
Visual- Flash verification will visually indicate when the unit has flashed. The
modeling lamp will cycle on and off, then return to its previous state.
Audible- The unit will beep twice when the unit has flashed and returned to full
power.
This function can be enabled / disabled by toggling the Flash Verification audible / visual
pushbutton switch.
10. Combine- When the pack is in combine mode; all of the power in the power pack is
distributed evenly to all lampheads that are enabled.
11. Lamphead Enable- Enables a Lamphead to be turned off without unplugging the
Lamphead. When “on” the Lamphead enable button illuminates and the lamphead display
shows the output level the lamp is set for. Upon a misfire, the Lamphead enable button will
blink on the head or heads that misfired. If enabled and there is no Lamphead plugged in, a
misfire will be recorded upon each flash.
12. Cooling fan- The D12 and D24 utilizes a cooling fan to remove excess heat from the
unit. Care should be taken to prevent blocking the vents on the sides of the unit. (Not shown
located on side panel of unit).
13. Slow Recharge- When enabled, the units recycle time is increased. This feature is useful
when operating at a location that has sub-par wiring.
14. Led Displays- Indicate the exact power setting, in watt-seconds, for each lamphead. The
displays also show error codes.
15. Computer Control Modular Jack- Used to hook up power pack to a computer via serial
port; contact factory sales about use and computer software.