Sony DNW-A75 Maintenance Manual page 113

C015 : DRUM MOTOR
This submenu checks the function of a drum motor.
Checking
(1) Press the SET button.
. Check to see that the drum rotates.
. Check to see that the superimposed display changes as shown on the right.
(2) To finish the check, press the MENU button once.
. Check to see that the drum stops.
In case of NG
. Check the mechanical abnormality.
. Check the drum motor driver circuit on the DR-315 board.
. Check the FG and PG outputs from the drum motor.
. Check the drum FG/PG shaping circuit on the DR-315 board.
. Check each circuit that processes the drum FG/PG on the SS-83 board.
DNW-A75/A75P
4-2. TAPE Maintenance Mode (M0)
4-2-2. SERVO CHECK Mode (C00-03)
SERVO CHECK
MOTOR CHECK
C015:DRUM MOTOR
SPEED :
PHASE :
PG :
[SET]
SERVO CHECK
MOTOR CHECK
C015:DRUM MOTOR
SPEED : NG
PHASE : UNLOCK
PG : NO EXIST
After about 3 sec.
SERVO CHECK
MOTOR CHECK
C015:DRUM MOTOR
SPEED : OK
PHASE : LOCK
PG : EXIST
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