Sony GY-2120WD Maintenance Manual page 395

2x 22
(ERROR 22) Reel position sensor defective
Description:The L and S cassette positions of the reel table were detected simultaneously.
Detection conditions:
Subcode:
Possible cause:
Protection operation:
2x 91
(ERROR 91) Servo reference does not exist
Description:Abnormality was detected in the servo reference signal (VD).
Detection conditions:
Subcode:
Possible cause:
Protection operation:
GY-2120WD/WS
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When the L and S position sensors detect the L and S cassette positions, respectively at the
same time
None (Displays 00.)
. S position sensor (PTC-71 board) trouble
. L position sensor (PTC-71 board) trouble
. Reel position input port (MS-54 board) trouble
Ejects the cassette if possible when an error occurs during cassette insertion.
Prohibits the cassette loading.
When the VD signal is not input to microcomputer SYS CPU (MA-83 board) in a system
control system for more than a fixed time period
None (Displays 00.)
. Servo IC (IC814/MA-83 board) trouble
. Microcomputer SYS CPU (MA-83 board) operation defect in servo system
Enters the protection mode when abnormality is detected by SV CPU.
Displays only this error when abnormality is detected by only SYS CPU.
6-3. Error Processing
6-171