Sony DSR-1800 Service Manual page 202

5-3. Contents of Maintenance Menu
5-3-3. Servo Check
5 CAPSTAN 5 5 5 5
Checks the capstan motor.
1. Execute the CAPSTAN.
2. Press the [*] key.
Confirm that [FORWARD ... OK] appears on the monitor
display.
3. Press the [*] key again.
Confirm that [REVERSE ... OK] appears on the monitor
display.
In the case of trouble :
If the monitor display does not change, check the capstan motor
and the capstan motor driver circuits (the DR-428 board).
5-18 DSR-1800/P/1600/P