ESAB Cadd Tig 1500i TA34, Service Manual

Page: 15 / 50

S0740 800 186/E080826/P50
-- 15 --
ct34_02
2AP1:3 Secondary circuit
The secondary circuit delivers the following voltages:
+24 V
The voltage is controlled by IC1 on the primary side. It has a tolerance of
±
0.6 V.
+5 V
The voltage is controlled by VR3. It has a tolerance of
±
0.25 V.
--15 V
The voltage is controlled by VR2. It has a tolerance of
±
0.75 V.
+13 VB (+12V CAN)
This voltage is unregulated. It has a tolerance of
±
1.5 V.
Early warning power shut down
If the voltage goes low, output PS4 generates a warning signal to the
processor on circuit board 20AP1 (see page 24). Transistor Q6 switches off the
fan, 15EV1, at the same time.