1-27
• No audio output.
Symptom Observed
on Monitor Screen
RF envelope Audio, etc. Possible Causes
Block noise on left SUP dropout • No audio output.
• Intermittent audio.
Block noise on right TU dropout • Timecode not counted.
One CH frozen No video output from one CH • Audio is output.
Frozen Low level
• Supply guide roller adjustment
failure.
• Dirt on supply side of drum.
• Take-up guide roller
adjustment failure.
• Dirt on take-up side of drum.
• Dirt attached on one CH of
head.
• Drum assembly defective.
• PR & MDA board IC901
defective.
• Dirt attached on head.
• Drum assembly defective.
1.17.2 RF Envelope Check
The RF envelope condition can be confirmed to a certain degree in the Error Rate adjustment display.
RF envelope condition