DR JOHANNES HElDENHAlN GmbH
D-i225 Traunreut Tel. (08669) 31-O
Kundendienst
SERVICE MANUAL TNC 151/155
Page 44
Section 3.2
Exchanging the Power Supply Unit:
.Rmove the 4 cross-head mounting screws from the rear of the
Control (2 screws are found in the connector box).
.Re!nove the back wall with the Power Supply Unit and Terminal
Board.
.Disconnect the ribbon cable connector, Pl, from the Connector
Board (see diagram).
.Remove the voltage supply plug, PZ, from the Connector Board
(see diagram).
Exchanging the Connector Board:
.Remove the 2 cross-head fixing screws of the V-24 connector
on the rear of the Control.
.Push the V-24 socket through its recess in the Control
housing.
.Unsolder the connectors to the WU socket from the Connec-
tor Board (solder terminals 1,4,5,6,7,8,10). Note the colour
of the wire connected to each terminal.
.Pull the Connector Board from the front of the Control hous-
ing.
PI
J
L
P2
111
113 114
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