Welch Allyn AudioScope - 3.2 Troubleshooting AudioScope 3 (Microcontroller)

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3.2 Troubleshooting AudioScope 3 s/n >=970000
(MICROCONTROLLER / NON-ASIC)
Complaint Cause Corrective Action
Unit does not turn on.
Green LED does not light.
Low battery voltage. Substitute with charged test
battery and retest.
Replace battery. Retry. If green
LED remains unlit, replace
board.
Cold solder joint at battery
terminal.
Restore connection by
reflowing joint (using T19102-
2).
Defective contact in power jack
will not close when charge plug
is removed.
Replace power jack.
Low battery voltage Defective power jack Replace housing.
Defective charging stand Check circuit and restore.
Speaker does not produce
tones.
Cold solder joint at speaker or
wire to PCB.
Restore connection by reflowing
joint (using T19102-2).
Broken speaker wire Repair wire.
Defective speaker Replace speaker.
No voltage at TP2 Replace Board
Does not calibrate at a
particular frequency.
Defective speaker Replace Speaker. If still does
not cal, replace PCB and retest.
Does not calibrate at any
frequency.
Call box plugged in backwards. Plug cal box connector into PCB
with orange wire towards
crystal.
PRETONE L.E.D. is blinking Unit needs calibration. Calibrate
Housing fails air seal test. Gasket not seated correctly Remove lens assembly and
rotate 180 degrees. Reinstall.
Leaking Lens Gasket Replace housing.
Leaking Stabilizing Grommet Replace.
Defective housing Replace housing.
Halogen lamp does not light. Low battery voltage. Recharge or replace battery.
Defective halogen lamp. Replace lamp.
Handle does not charge. Bent or broken charging
contacts in charging well.
Re-shape contact(s)
Replace Housing Assembly
Excessive battery drain. Shorted lamp. Replace Lamp.