Sony Betacam SX DNW-A22, Руководство по обслуживанию

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4-22
DNW-A22/A22P
Locations of S and L Position Sensors and Reel Shift Motor
SERVO CHECK
MOTOR CHECK
C016:REEL SHIFT MOTOR
S-POSITION
SERVO CHECK
MOTOR CHECK
C016:REEL SHIFT MOTOR
...........
SERVO CHECK
MOTOR CHECK
C016:REEL SHIFT MOTOR
L-POSITION
[SET]
S reel table T reel table
(S cassette position state)
L position sensor S position sensor Reel shift motor
4-2. TAPE Maintenance Mode (M0)
4-2-2. SERVO CHECK Mode (C0)
C016 : REEL POSITION MOTOR
This submenu checks the functions of a reel shift motor and two reel position
sensors.
n
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 “S-POSITION” on the superimposed display, press the SET
button once.
. Check to see that an S and T reel tables move from the S position (S cassette
position) to the L position (L cassette position).
. Check to see that “S-POSITION” changes as follows:
S-POSITION 8 ........... 8 L-POSITION
(2) When displaying “L-POSITION”, press the SET button once.
.
Check to see that the S and T reel tables move from the L position (L cassette
position) to the S position (S cassette position).
. Check to see that “L-POSITION” changes as follows:
L-POSITION 8 ........... 8 S-POSITION
(3) To finish the check, press the MENU button once.
In case of NG
. Check the mechanical abnormality.
.
Check the reel shift motor driver circuit on the DR-315 board.
. Check the reel shift motor.
. Check the S or T position sensor on the PTC-71 board.
. Check the sensor input port of MPU (IC1 on the MS-50 board).