Sony DNW-A75 Maintenance Manual page 111

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C013 : CASSETTE COMP. MOTOR
This menu checks the functions of a cassette compartment motor and cassette-down
sensor.
c
Be careful not to execute this menu with the foreign matter put into the cassette
compartment.
When a cassette tape is located in the cassette insertion slot, remove the cassette
tape. If this menu executes without removing, the cassette tape will be caught
halfway.
m
. If the cassette compartment has stopped halfway due to abnormality, "HORIZ." or
"VERT." will be displayed on the superimposed display on selecting this menu.
. The power supply to the motor stops to protect the motor and movable parts when
the driving time of the motor continuously exceeds about six seconds.
Checking
(1) When displaying "UP" on the superimposed display, press the SET button once.
. Check to see that the compartment goes down.
. Check to see that "UP" changes as follows:
UP 8 HORIZ. 8 VERT. 8 DOWN
(2) When displaying "DOWN" , press the SET button once.
. Check to see that the compartment goes up.
. Check to see that "DOWN" changes as follows:
DOWN 8 VERT. 8 HORIZ. 8 UP
(3) To finish the check, press the MENU button once.
In case of NG
. Check the mechanical abnormality.
. Check the cassette compartment motor driver circuit on the DR-315 board.
. Check the cassette compartment motor.
. Check the cassette-down sensor (s) on the CL-29 board.
. Check the sensor input port of MPU (IC1 on the MS-58 board).
Rear
Front
DNW-A75/A75P
Top View of Cassette Compartment
4-2. TAPE Maintenance Mode (M0)
4-2-2. SERVO CHECK Mode (C00-03)
SERVO CHECK
MOTOR CHECK
C013:CASSETTE COMP.MOTOR
UP
[SET]
SERVO CHECK
MOTOR CHECK
C013:CASSETTE COMP.MOTOR
HORIZ.
SERVO CHECK
MOTOR CHECK
C013:CASSETTE COMP.MOTOR
VERT.
SERVO CHECK
MOTOR CHECK
C013:CASSETTE COMP.MOTOR
DOWN
Upper
Cassette-down sensor (1)
Lower
Cassette-down sensor (2)
Cassette compartment motor
4-21

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