Rewinder Motor Driver (7010R Only) - Tally Dascom 7010 Series Maintenance Manual

(3) Rewinder motor driver (7010R only)

This is a driving circuit to drive the rewinder motor (DC motor). The following illustration shows
a simplified circuit.
Rewinder motor ON/OFF status is controlled by DCMTR1 and DCMTR0 signals sent from pins
35 and 40 of U1 (CPU).
Motor ON:
Motor OFF (free): DCMTR1=L and DCMTR0=L
Braking:
When DCMTR1 signal is "Low", Q502 turns OFF and Q501 turns OFF. When DCMTR0 signal
is "High", Q506 turns ON, Q505 turns OFF and, if Q503 is OFF (DCMTR1 signal is "Low"),
Q504 turns ON and the rewinder motor is turned.
+24.0V
J15
U1 CPU
R157
DCMTR1
PCS7
35
R156
DCMTR0
PCS4
40
MTREF
(+RW Control)
+5.0V
J16
+3.3V
R163
MTENC
J15
P72
176
R165 C99
+3.3V +3.3V
U14
R153
Custom IC
R154
R158
HPSENS0
SW6
84
R159
85
SW5
HPSENS1
C96
C97
[Main PCB]
Rewinder Full detection:
The form sensor (photo interrupters PS501 and PS502) on the SA, Rewinder PCB is used to
detect the diameter of wound liner (or the amount of liner) at the flange in the following four
stages. As the diameter increases, the Measure Flap Plate turns backward and engages with
PS501 and PS502.
1st stage:
2nd stage:
3rd stage:
4th stage (Full): PS501: OFF, PS502: OFF
The 1st to 3rd stages are used to control the rewinder motor speed as mentioned on the next
page. The 4th stage is the Full state.
DCMTR1=L and DCMTR0=H
DCMTR1=H (DCMTR0=L/H)
J501
1 1
+24.0V
2 2
7 7 DCMTR1
6
6 DCMTR0
R509
C507
J502
1
1
+5.0V
2
2
3 3
MTREF
4
4
J15
J501
8
8 HPSENS0
9
HPSENS1
9
PS501: ON, PS502: OFF
PS501: ON, PS502: ON
PS501: OFF, PS502: ON
R504
Q502 D502
D504
DTC114EM
R506
R505
Q501
C506
2SJ668
Q503
DTC114EM
+5.0V
+5.0V
R507
R508
Q505
DTC114EM
Q506
DTC114EM
+24.0V
Switching Regulator
U501
+RW
ADJ
+5.0V
R511
PS502
2-35
2-2. Operation of Control Parts
+RW
D503
J701
J504
2
1
3 3
+5.0V
5 5
R512
7
7
6
6
Q504
2SK4033
MTENC
+5.0V
R510
PS501
[Rewinder PCB]
[SA, Rewinder Motor]
Rewinder Motor
M
Blade
PS701