Troubleshooting
17
9.5 Software
Problem
Remedy
Software version is not
updated
Carefully remove the switcher cover and identify the EPROM chip that is
located in the middle of the main board, marked by a white sticker. Remove
the chip with the proper tools and insert the new EPROM carefully,
observing proper polarity.
9.6 Switching Malfunctions
Problem
Remedy
The switcher succeeds
in switching a number of
sources then fails to
switch one
Malfunction in the particular source or cable assembly.
NOTE:
The most common failure mode in transferring the signal of an audio
source is a break in the connecting wire.
Disconnect the source from a channel that is switching successfully and
connect the suspect source to it. If the channel continues to switch
successfully, then there is something wrong with the switcher or the suspect
source was not connected properly. If it does not continue to switch
successfully, then there is something wrong with the source or cable
assembly. Check them.
The switcher turns ON
but will not switch at all
One of the two flat cables leading from the main board to the control board
may be disconnected and the switch command is not being transferred to
the switcher.
9.7 Vertical Interval
Problem
Remedy
The switcher is
switching, but there are
transitional effects when
using genlocked
sources. The picture
jumps and rolls, and the
color is lost until the
acceptor (a VCR, for
example) has readjusted
itself to the new color
information
There is no vertical interval Sync source for switching. It should be available
either on video input #1 or on an external genlocked source as a live video
or a live black burst signal. Which one, will depend on certain jumper
settings.
Turn OFF the power switch, remove the power cable from the mains socket
and carefully remove the cover of the switcher. Carefully remove the audio
board by unscrewing the four upper board screws. The upper board can
now be raised with ease. Find jumper J20 (also J34 in an interconnected
configuration) and set up the Sync source in accordance section 6.3.
