Problems And Solutions - natus OLYMPIC SMART SCALE 60 Mode D'emploi

Section 3: Service
Page 3-10

Problems and Solutions

Schematics, wiring diagrams and PCB drawings are located at the
back of this manual.
Use the troubleshooting measurements, below, to test printed
circuit boards (PCBs) and components that are suspect of
being defective. For additional information, see Troubleshooting
on page 3-20.
NOTE: The scale will not zero unless the tray is in place.
Ensure that the tray is in place when troubleshooting.
Before performing troubleshooting measurements:
1. Disassemble the scale (see Disassembly on page 3-6).
CAUTION: To avoid risk of electrical shock when the
device is disassembled, use battery power, as required,
for troubleshooting.
2. Use appropriate methods to determine if voltage is present at
the electrical outlet.
3. Ensure that all fuses and connectors are properly seated.
4. Check the supply voltages on main and power supply PCBs as
shown in Fig. 3L. If any voltages are out of tolerance, contact
Natus Medical about replacing the defective PCB.
ID Test Point
Vin
CHG/AC_ON
GND
Vbat
+5Vdigital
+5Vanalog
-5Vanalog
OLYMPIC SMART SCALE
Location PCB Value
J4-1 Power supply 12.00 ±0.25Vdc
J3-1 Power supply 5.00 ±0.25Vdc
TP1 Power supply reference
TP2 Power supply 7.2Vdc nominal
TP1 Main 5.00 ±0.1Vdc
TP2 Main 5.00 ±0.1Vdc
TP3 Main -5.00 ±0.5Vdc
Fig. 3L
® Model 60/65