Canon MV750i E, Service Manual

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MV750i E, MV730i E, MV700i E, MV700 E, MV690 E
TECHNICAL DESCRIPTION
18
5-5 Error Detection
If an abnormality has been occurred in any rotation drive system (drum, capstan, reel, loading), a relevant mode enters. The LCD
indicates “PLEASE UNLOAD THE CASSETTE” and blinks “EJECT”.
5-5-1 Error Detecting Conditions
The following table gives error detecting conditions.
5-5-2 Processing after Error Detection
The following table gives processing after error detection.
• Pop up : Error display
→
error eject
→
pop up
→
error clear
• Error stop : Error display
→
STOP position (not cleared unless EJECTED)
Kind Condition Detection
Drum error Error detecting mode Starting / steady D-FG
FG frequency when steady 900Hz
Error detecting level Starting: Beyond 80-150%.
Steady : 30% max.
Error detecting time Starting : 5sec.
Steady : 0.5sec.
Capstan error Error detecting mode Starting / steady C-FG
FG frequency when steady 1347Hz
Error detecting level Starting : 80% max.
Steady : 60Hz max.
Error detecting time Starting : 2sec.
Steady : 2sec.
Reel error Error detecting mode Starting / Normal / UNLOAD T, S-REEL FG
Error detection Normally : The C-FG count per reel FG cycle is C-FG
Starting : M ore than 3296
Steady : M ore than 2256
UNLOAD : Reel FG cycle is 1 sec or more
(Take-up reel only for both)
Loading error Error detecting mode M ode transfer M ode SW
Error detection M ode transfer time
STANDBY-STOP : 6sec
STANDBY-POPUP : 3sec
STOP-PLAY : 3sec
Cassette in Loading
During
loading
Loading
completed
During tape
running
During mode
Drum error Pop up Pop up Error stop Error stop Error stop Error stop
Capstan error
Pop up ------- Error stop Error stop Error stop Error stop
Reel error ------- ------- Error stop Error stop Error stop Error stop
Loading error Pop up Pop up Error stop Error stop ------- Error stop