In Resistive Load Operation, The Output Voltage Is Not Regular - Cebora POWER SPOT 5600 Service Manual

CEBORA S.p.A.

3.3.5 - In resistive load operation, the output voltage is not regular.

For the following test use a resistive load capable of circulating a current greater than 100
Adc, at a maximum voltage of 210 Vdc (for example 0.5 ohm).
OUTPUT VOLTAGE TEST ON RESISTIVE LOAD.
With power source powered, connect the resistive load to terminals (F) and (G) of the power

source and the gun signals connector to connector (H) of the power source.
Press the start button. Terminals (F) and (G) (gnd) = fig. 5.2.1 in the table conditions.

Programmed voltage
(display (E).
210 Vdc
In this test, at the end of each pulse it may be necessary to disconnect the load (as occurs
normally when the rivet is changed in the gun), to avoid an "E2" block of the power source.
If blocked, shut off and restart the power source without connecting any charge.
♦ Check the flat cable between CN4 power board (12) and CN2 control board (2).
♦ Check voltages on the windings of the transformer (31) see SERVICES POWER
SUPPLY TEST in par. 3.3.1.
♦ Check the wiring between terminal (+) on power board (12), positive terminal of
the DC-capacitors (24), and output terminal (F) of the power source; between
terminal 2 of CN2 on power board (12) and scr (3) cathode (equivalent to the
negative terminal of the DC-capacitors (24)), and between scr (3) anode and
output terminal (G) of the power source. If you find loose or burnt connections,
clean thoroughly and tighten, or replace any damaged terminals or components.
♦ Check operation of the start command, if necessary performing the START
COMMAND TEST in par. 3.3.3.
♦ Replace the control (2) and/or power (12) boards.
♦ Replace scr (3).
♦ Regular operation.
3.302.311
NOTE
Resistive load resistance.
0.5 ohm
NOTE
YES Correct?
NO
Output voltage
pulse.
fig 5.2.1.
23/01/2015
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