Sony DNW-A100 Maintenance Manual page 489

Check
4. Turn the Power On
5. Mode Setting (REC Head PB)
(1) Press S1101 switch on the SS-63 board to
enter the maintenance mode.
(2) Set the cursor "*" to the "M0 : TAPE
MAINTENANCE" and press the SET button.
(3) Set the cursor to the "C4 : OTHERS" and
press the SET button.
(4) Set the cursor to the "C48 : PATH MODE
SEL" and press the SET button.
(5) Check that the "Switching PB" is indicated,
and press the SET button.
n
Refer to Section 4 of the maintenance manual
part 1 "Maintenance Mode" for more infor-
mation about the maintenance mode.
6. Play Back the Alignment Tape
Play back the SR2-1/P (00:00 to 15:00).
7. Check the CTL Head Position
(1) Check that the marker exists in the RF
waveform that comes 15 ms. later than the
rising edge of the SS GOP signal.
(2) Push S100 switch on the SS-63 board more
than 1 sec. so that the tracking VR becomes
to be effective.
(3) Turn RV100 (tracking VR) on the SS-63
board so that the output level at the center
portion of the RF envelope waveform is
maximum and read the maximum level as Lv.
(4) Push S100 switch on the SS-63 board more
than 1 sec. to fix the tracking VR.
(5) Read the output level at the center portion of
the RF envelope waveform as L
(6) Check that the levels Lv and L
specification 2.
If the specification is not satisfied, perform
steps 8 and later.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
. Alignment tape : SR2-1/SR2-1P (00:00 to 15:00)
(Tracking VR : Effective)
<SS-63 board, side A>
A B
AB EVEN ENV
(RF envelope)
(Tracking control : Effective state) (Tracking control : Non effective state)
.
F
satisfy the
F
7-1-5. CTL Head Position Check and Adjustment
CTL head
C D E F G H
S100 RV100(Tracking VR)
SS GOP
15 ms
Spec.1: The marker exists in the RF waveform that
comes 15 ms later than the rising edge of
the SS GOP signal.
L
V
L
F
> 0.8
L
V
Spec.2: When the tracking VR is not effective, the
output level at the center portion of the RF
envelope waveform (L
against the maximum output level (L
under the state of the tracking is effective.
CTL Head Position Check
J K L M N P R
Marker
L
F
) is 80% and more
F
)
V
7-29
1
2