TWR Lighting E-1DBSL Manual page 19

DUAL MEDIUM INTENSITY LED/STROBE
3.8.2 High Voltage (PCB #2, LED 1, #D14)
3.8.3 Trigger Voltage (PCB #1, LED6)
3.8.4 Nightmode
3.8.5 Primary Timing (PCB #1, LED8)
M.2006 MANUALS.E-1DBSL
REV. 08/10/04, 12/09/05, 2/08/06, 04/11/06 (load resistor)
REV. 06/21/06 (part numbers), 7/13/06 (Appendix & 6.0 Major Comp. List)
REV 10/20/06 (Appendix & parts lists)
REV. 04/10/07 (text)
MODEL E-1DBSL
The Cathode side of the high voltage HV is routed through a current limiting
resistor. When the unit is in daymode, LED 1, D14 will be at full brightness
when the capacitors are at full charge, but dims with the discharging of the
storage capacitors. A constant intensity indicates that high voltage is present
but capacitors are not discharging (check other indicators for fault). When
the red LED fails to glow, then the high voltage is no longer present.
The voltage from secondary of T1 is sent to PCB #1, then rectified for trigger
circuit. The LED6 is connected to the trigger voltage via R30. Under normal
circumstances, the red LED must be flashing synchronously with the strobe.
An absence of this indication means that the voltage is no longer present.
Output voltage from the photocell (SSR) energizes K4 on PCB #3. The
circuit switches the input power to the red circuit that in turn will operate the
LED Red Beacon. If a failure in the LED Red Beacon occurs, the control
circuit will switch power back to the white strobe for failsafe as described in
the next section.
3.8.4.1 Failsafe Mode (PCB #1, LED7)
Since the power switches back to the strobe circuit, the photocell
(SSR) energizes RYL1 on the main PCB #1 that will send 12V to
Light LED7, and set timing circuit operating in nightmode as well.
The primary timing pulses are received at LED8 (D3). LED8 will flash
according to the pulses received from the timing circuit. If LED8 fails to
flash, then the primary timing circuit has failed. Check LED9 (D28) for
secondary timing operation. The strobe unit should produce 40 (+/-2) pulses
per minute.
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