Specifications

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SECTION 5 MACHINE TESTING / TROUBLESHOOTING / SERVICE
5.7 Control Transformer T2 (35940)
This transformer supplies reduced AC voltages to the PCB1 control board. It receives 230 volts on the H1
(red) and H3 (gray) leads on the primary, which is stepped down to multiple secondary voltages (See the
accompanying chart).
For the PC 650, the X1- X2 winding feeds 12VAC to the torch switch circuit. The X3-X4 18VAC winding is
not connected. The X5-X6 winding sends 12VAC to the –12VDC bias supply. Winding X7-X8 sends 24VAC
to the gas relay. The X9 – X10 winding sends 20VAC to the +12 & +15VDC bias supplies.
WINDING RESISTANCE VALUE ± 15% VAC ± 15%
H1 - H2 20 OHMS 208V, 50/60 Hz
H1 - H3 23 OHMS 230V, 50/60Hz
H1 - H4 43 OHMS 400V, 50/60 Hz
X1 - X2 1.2 OHMS 12.3V ± .2
X3 - X4 1.6 OHMS 18.3V ± .2
X5 - X6 1.2 OHMS 12.3V ± .2
X7 - X8 2.4 OHMS 24.9V ± .2
X9 - X10 2.0 OHMS 20.3V ± .2
X11 - X12 9.5 OHMS 125 V ± 1.0
208 / 230 Volt
460 Volt
CONTENTS