Sony DNW-A100 Maintenance Manual page 101

ERROR-20 CASSETTE COMPARTMENT MOTOR LOCK
Description: Malfunction of cassette compartment-up or down operation was detected.
Detection conditions: When no operation is completed with in about six seconds after operation start
Sub error message: None
Possible cause: . Cassette compartment block trouble
. Cassette compartment motor drive circuit (DR-315 board) trouble
. Cassette-down sensor (CL-29 board) trouble
. Cassette-down input port (IC1 on MS-50 board) trouble
Protection operation: Stops the movement of the cassette compartment and reel table until a cassette
eject button is pushed.
ERROR-21 REEL SHIFT MOTOR LOCK
Description: Malfunction of movement of the reel table corresponding to the cassette size was
detected.
Detection conditions: When no operation is completed with in about six seconds after operation start
Sub error message: None
Possible cause: . Reel shift mechanism trouble
. Reel shift motor trouble
. Reel shift motor drive circuit (DR-315 board) trouble
. Reel position sensor (PTC-71 board) trouble (S position sensor or L position
sensor)
. Reel position input port (IC1 on MS-50 board) trouble
Protection operation: Stops the movement of the reel table and ejects the cassette during cassette
loading.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
3-1. Error Message
3-13