Sony BVW-55 Maintenance Manual page 66

2-2. Details of Error Messages
ERROR-07 CAPSTAN TROUBLE
(CAPSTAN TROUBLE)
Description: Abnormal capstan motor rotation speed was detected in the REC, PLAY,
SEARCH, or REW mode.
Malfunction of capstan FG was detected in the REC or PLAY mode.
Detecting conditions: 1) When the capstan motor ratation speed is under a half of the specified speed
2) When the frequency calculated from the capstan FG is out of the specifica-
Sub error message: None
Possible causes: . Capstan motor trouble
. FG sensor trouble in capstan motor
. Capstan motor drive circuit (SV-206 board) trouble
. Capstan motor FG waveform shaper circuit (SV-206 board) trouble
. Capstan FG duty adjustment defect
Protecting operations: Stops the tape transport and enters the rest state.
ERROR-08 DRUM TROUBLE
(DRUM TROUBLE)
Description: Malfunction of drum motor was detected.
Detecting condition: 1) When the drum FG is not detected for more than 0.2 second.
2) When the drum rotation speed is over 90 rotations per second, and this
3) When the drum rotation speed is under the specified.
Sub error message: None
. Drum motor trouble
Possible causes:
. Drum microcomputer (IC210 on SV-206 board) trouble
. Drum motor drive circuit (SV-206 board) trouble
. Drum FG/PG waveform shaper circuit (SV-206 board) trouble
. Assembly defect during upper drum replacement
Protecting operation: Stops the tape transport and enters the rest state.
2-8
continuously for more than four seconds in the SEARCH or REW mode.
tion in the REC or PLAY mode.
condition continues and accumulates about three seconds within ten seconds.
BVW-55