GRASS VALLEY Profile XP PVS1000, Service Manual

Page: 46 / 172

Chapter 4 Troubleshooting audio problems
46 Profile XP Service Manual 23 July 2004
Audio problems related to Audio board
Problem Possible Causes Corrective Action
Internal memory problems in the
Digital Signal Processor during
play. The DSP's internal memory
buffers have overflowed during
play mode. Do one or more of the following:
• Restart the Profile XP
system.
• Replace the board.
• If the problem persists
contact Support.
The audio system was unable to
extract embedded during an EE
or record mode. This indicates a
loss in audio and a possible loss
in video. Do one or more of the following:
• Check for loss of input
signal.
• Replace the board
• Restart the Profile XP
system.
• If the problem persists,
contact Support.
Audio is lost due to a loss in
connectivity between
Receive-Port N on the Audio
board and the crosspoint fabric. Check for configuration
problems. See the table under
“Correcting common audio
problems” on page 48..
The recording and playing of
audio will be disrupted due to a
bad audio-clock average sample
count. Disrupted audio clock.
Audio sample clock reference
incorrectly selected. Use system reference as audio
clock reference for synchronous
video signals.
The Digital Signal Processor is
producing poor audio. The DSP hardware has failed to
wait for a new mode because its
command queue is full and is not
producing good audio. Do one or more of the following:
• Restart the Profile XP
system.
• Replace the board.
• If the problem persists
contact Support.
Bad recording, or bad E-E audio
(fifo overflow). SDI input error.
Disrupted play/record of audio
with AES I/O. Loss of input signal due to no
signal or poor signal from source. Check presence and quality of
input signal from source.
Loss of input signal due to cable
disconnect. Check all cabling into breakout
box and between breakout box
and Audio board.