Avery Berkel CX20 SERIES, Service Manual

Page: 178 / 353

16 — Power Supply Unit
16–4 CX20/CX30/CX34 Service Manual
The output of the SMPS is protected by fuse FS2 (6.3A). The various power
outputs are made available at PL1.
When installed in a unit, the power supply is covered by a ventilated shroud.
The shroud is fabricated from sheet aluminium.
Table 16.1 Power Supply Unit – Specifications
Type Switched mode power supply
Input voltage 110Vac
Input frequency 50 to 60Hz
Input current 2 Amperes (maximum) surge
Power output (total) 150 Watts
Output voltages +5 Vdc
+10/0/–10Vdc
+46Vdc
9.6Vac (frequency at input
frequency)
+12/0/–12Vdc
+22Vdc
16.2 Servicing
WARNING 1
THE POWER SUPPLY UNIT AND ITS CONNECTING
CABLES CARRY LETHAL VOLTAGES. WHEN TESTING
OR FAULT–FINDING THE UNIT, EXERCISE EXTREME
CARE. ENSURE THAT ANY TEST EQUIPMENT USED IS
IN GOOD CONDITION AND CAPABLE OF WITHSTANDING
THE VOLTAGES EXISTING. TOOLS USED MUST HAVE
INSULATED HAND GRIPS. TEST PROBES AND JUMPER
LEADS MUST BE IN GOOD CONDITION AND MUST HAVE
ADEQUATE INSULATION. TEST PROBES WITH CLAW
ENDS AND JUMPER LEADS MUST NOT HAVE INSECURE
PARTS WHICH MAY FAIL DURING USE.
WARNING 2
THE POWER SUPPLY UNIT AND ITS CONNECTING
CABLES CARRY LETHAL VOLTAGES. WHEN TESTING
THE POWER SUPPLY UNIT: USE A WORKBENCH THAT
HAS A RUBBER SURFACE; STAND ON A RUBBER
SURFACE; DO NOT WEAR AN EARTH STRAP; WEAR
EYE PROTECTION;
DO NOT WORK ALONE.