MALFUNCTION
CO RRE CTIVE ACTION
PROBABLE CAUSE
16.2.1. Unit gives
1. Rear panel fuse,
no indication of
main power supply,
battery is depleted
for 14v on C1. Replace fuse or
operation. Charge
or not in circuit.
(line) LED off.
faulty component.
(Unit plugs in)
Charge line LED on.
2. Fuse F1.
necessary.
16.2.2. Unit operates
on line but not on 1. Battery.
Make sure battery is fully
charged. Replace defective
battery after
battery.
sufficient
charge time.
2. Battery charger, Q11,
Charging current should
CR56, Q10.
measure 200mA. Adjust R115
for proper current. Replace
faulty component.
16.2.3. Unit operates
Q1, Q2, Q3, CR1,
Check for 12.6v on collector of
on battery
Q1. Make sure relay is activating.
K1.
but, not on line.
Replace faulty components.
16.2.4. Power light
Isolated 12v, Q4,
Check for 12v 12F at output of
turning on but
Q5,T2, U5.
U5. Check for oscillation on
when charge
collectors of Q4, Q5. Replace
button depressed,
faulty component.
unit does not charge.
Charge light blinking
"clicking."
16.2.5. Unit charging
Check for mosfet drive on pins 6,
but never
invertor, high
4 of U3. Check for 18v on input
reaches full
charge.
of U4. Troubleshoot and
voltage supply.
replace.
Check RDY line. This line should
2. U6, U9, U7, U8, zener
be pulled low by U16. If it is
pulling low early, check zener
diodes. Replace capacitors.
Inspect for electrolyte on board.
3. Leaky or damaged
capacitors C12-C19.
Figure 2-4. Defibrillator troubleshooting guide (continued).
MD0362
2-45