10-14
HDW-750/750CE V1
10-5-2. Capstan FG Duty Ratio Adjustment
Adjustment Procedure
1.
Set the switch S1-1/AT-143 board to the ON position.
2.
Set the MENU ON/OFF switch on the inside panel to
the ON position to start up the maintenance mode.
3.
Select “A001 : CAPSTAN FG DUTY”. The message
“PUSH RE TO ADJUST” appears.
4.
Press the rotary encoder to start adjustment.
The message “NOW ADJUSTING ...” appears while
the adjustment is in progress.
5.
When adjustment ends successfully, the message
“COMPLETE” appears. The adjustment data is
automatically saved in the servo system EEPROM
(IC403/MDC-13 board).
When the adjustment fails
When the adjustment fails, the message “INCOMPLETE”
appears.
Check the following possible causes.
.
MDC-13 board capstan FG amplifier or capstan motor
driver circuit is defective.
.
SS-92 board capstan drive output signal or duty ratio
adjustment output signal is abnormal.
.
Capstan motor is defective.
10-5-3. Capstan Add-On Recording
Adjustment
A working tape is required for this adjustment. Use the
center position, which is at about 20 to 25 minutes of a
BCT-40HD cassette tape.
n
You can check that a working tape is at about the 20-
minute position as follows:
.
The 4 black square indicators “ ” turn on in the
remaining tape indication area on the display window/
inside panel.
.
The message “15-20” appears in the remaining tape
indication area on VF.
Adjustment Procedure
1.
Cue up a working tape to about the 20-minute position.
2.
Eject the working tape.
3.
Set the switch S1-1/AT-143 board to the ON position.
4.
Set the MENU ON/OFF switch on the inside panel to
the ON position to start up the maintenance mode.
5.
Select “A002: CAPSTAN DELAY”. The message
“INSERT WORK TAPE” appears.
6.
Insert a working tape (that has already been cued up to
about the 20-minute position.)
7.
When the working tape is inserted, the adjustment
starts automatically.
The message “NOW ADJUSTING ...” appears while
the adjustment is in progress.
8.
When adjustment ends successfully, the message
“COMPLETE” appears. The adjustment data is
automatically saved in the servo system EEPROM
(IC403/MDC-13 board).
9.
The working tape is ejected automatically.
When the adjustment fails
When the adjustment fails, the message “INCOMPLETE”
appears and the working tape is ejected automatically.
Check the following possible causes and repeat this
adjustment again.
.
Tape run is abnormal or the tape is damaged.
.
Tension of the timing belt needs adjustment.
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Refer to the following sections for adjusting the tension of
the timing belt.
8-1-3. FWD Holdback Tension Adjustment
8-1-4. REV Holdback Tension Adjustment
8-1-5. Timing Belt Tension Adjustment
10-5. Servo System Alignment
