Sony BVW-55 Maintenance Manual page 192

2-2. TAPE Maintenance Mode (M0)
2-2-2. SERVO ADJUST Mode (A0)
For Automatic Adjustment Failure
The circuit in which failure occurred can be traced to some degree by the trouble message displayed
together when message "# ADJUST INCOMPLETE #" is displayed during execution of adjustment
menus A000 to A005.
n
The trouble message display indicates that no adjustment could be performed because the circuit de-
scribed in this manual does not operate normally. Moreover, other circuits (e.g., control signal system) in
which failure actually occurred may also exist.
A000 : A000-A003 ADJUST
Refer to the description of A001 to A003.
A001 : S REEL FG DUTY
When "S REEL FG AMP TROUBLE" is displayed
8
Check the S reel FG amplifier circuit on the SV-206 board.
When "S REEL DRIVER TROUBLE" is displayed
8 Check the S reel motor driver circuit on the SV-206 board.
A002 : CAPSTAN FG DUTY
When "CAPSTAN FG AMP TROUBLE" is displayed
8
Check the capstan FG amplifier circuit on the SV-206 board.
8
Check the capstan motor driver circuit on the SV-206 board.
A003 : CAPSTAN FRICTION
When "T REEL TROUBLE" is displayed
8
Check the function cam drive circuit on the SV-206 board.
8
Check the function cam sensor circuit on the SV-206 board.
When "SERVO TROUBLE" is displayed
8
Check the capstan motor drive circuit on the SV-206 board.
8
Check the capstan FG shaping circuit on the SV-206 board.
A004 : CAPSTAN FREE SPEED
Confirm whether the played back tape is following alignment tape.
CR2-1B (for a 525/60 system)
CR2-1B PS (for a 625/50 system)
When "CAPSTAN SERVO TROUBLE" is displayed
8
Execute the capstan FG duty adjustment (A002 : CAPSTAN FG DUTY) again.
8 Check the capstan FG amplifier circuit and CTL amplifier circuit on the SV-206 board.
When "CAPSTAN DRIVER TROUBLE" is displayed
8
Check the capstan motor driver circuit on the SV-206 board.
A005 : RF SWITCHING POS.
Confirm that the played back tape is alignment tape CR2-1B.
2-16
BVW-55 P2