Sony BETACAM SX DNW-A30 Maintenance Manual page 77

ERROR-90 KEYBOARD INTERFACE ERROR
(NO COMMUNICATION)
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This error message is displayed in the time data display area, but error code is not displayed. The error
message is not superimposed to the video monitor, and ALARM indicator does not light.
Description: The communication between the lower control panel (KY-364 board) and SIO
(IC1102 on SS-63 board) is not normal.
Detecting condition: The microcomputer (IC104 on KY-364 board) on the lower control panel cannot
receive transmit signal from SIO
Sub error message: None
. Cable connection defect or disconnection
Possible causes:
. Line receiver/transceiver (IC102 on KY-364 board) trouble
. SIO (IC1102 on SS-63 board) trouble
Protecting operation: None
ERROR-91 SYSTEM REFERENCE NOT EXIST
(SYSTEM REFERENCE)
Description: Abnormality was detected in the system reference signal (VD).
Detecting condition: When the VD signal is not input to IC1903 on SS-63 board for more than a fixed
time period
Sub error message: None
. Servo IC (IC313 on SS-63 board) trouble
Possible causes:
. Servo CPU (IC103 on SS-63 board) trouble
Protecting operation: Enters the protection mode when abnormality is detected by the servo system
(Servo CPU).
Only displays this error when abnormality is detected by only the system control
system.
DNW-A30/A30P
DNW-30/30P
3-1. Error Message
3-15