Specifications

5-14 888-2500-001 5/2/2013
WARNING: Disconnect primary power prior to servicing.
DAX-1/DAX-3
Section 5 Maintenance and Alignments
5.6 Parts Replacement
See Section 7, Replaceable Parts List, for part numbers available for replacement.
5.6.1 Power Supply Controller
The following procedure explains in detail the necessary steps to replace a Power
Supply Controller board. It is recommended that the technician read through these
instructions prior to proceeding with this replacement.
NOTE:
For servicing the Power Supply Controller board or associated PS components,
the Power Supply chassis can be slid rearward from the transmitter cabinet for
improved access. See "2.3.4.2 Transmitter AC Connection" on page 2-12 in Sec-
tion 2 of this manual.
STEP 1 Turn off transmitter
STEP 2 Turn off AC power at CB1
STEP 3 Remove the old Power Supply Controller board
STEP 4 Install the new Power Supply Controller board
STEP 5 Connect a PC to the DAX and set up the VT100 emulation as outlined in
section "5.5.1 VT100 Calibrations and Alignments" on page 5-8 above
STEP 6 Turn on transmitter AC power at CB1
STEP 7 Connect an AC voltmeter to the test points labeled “XFMR
SECONDARY SAMPLE” (TP11 and TP12) on the Power Supply
Controller board and note reading
STEP 8 Call, or hit "Enter" twice to initiate handshake between DAX and PC
STEP 9 Use Left/Right arrow to go to sheet 5 (see "5.5.1 VT100 Calibrations and
Alignments" on page 5-8) of the VT100 screens