ZOLL PD 2000 - Page 63

SERVICE MANUAL
Outputs (other than power)
. XPWR_RESET is a warning signal from the CPU +5V supply
to the CPU indicating that power loss is imminent.
XSAF_RESET is a warning signal from EPU +5V supply to the
EPU indicating that power loss is imminent.
TEMPSENS is a measure of internal temperature
XPWR KILL (above).
FUSEBATT and VSAVE PWR are always available so long as
a battery pack is inserted. When a pack is removed,
FUSEBATT is also removed, but VSAVE PWR remains for
several hours to support the real time clock.
Two of the voltages are stacked on top of the battery pack
voltage: PSTN. PWR and RCDR PWR. The CRT heater power
floats between SWBATT and RCDR PWR.
The 5000 volts for the CRT anode is provided by a separate voltage
multiplier whose input is provided by the Power Supply 900 V Peak to
Peak.
Voltages in the table are available at the same time. When the battery
pack is removed, these voltages remain for a short time so that the
microprocessors can complete their essential tasks.
The unconditioned battery voltage RAWBATT is used directly by the
stimulator board to provide high current for pacing pulses and high
voltage capacitor charging.