Rev. A
Product Overview
Appendix D-63
TM-H6000/H6000P Service Manual
Confidential
Thermal Mechanism Drive Circuit
Paper Feed Motor Drive Circuit
The paper feed motor drive circuit drives the thermal receipt feed motor, a 2-phase stepping
motor. The motor is driven with 2-2 phase excitation at a constant current (partial 1-2 phase
excitation). Therefore, a dedicated driver IC is used for the drive.
Figure D-62
When the 24VSW2 GA output terminal goes HIGH, 24VA and VCC-PWR2 are supplied,
enabling the driver IC for the paper feed motor to operate. The current can be set at the logic
level described in the table below in this status. Firmware-based DA output of the CPU is used
to set the current (VREF1, 2 terminal voltage).
The VREF is set by firmware (range: 0 - VCC) to control the current. Constant current operation
is controlled at that current setting. The logic level of PH1, 2 phase data is changed to drive the
circuit.
TableD-12 Output current
I0
I1
Output Current
L
L
VREF / (10
×
Rs)
H
L
VREF / (15
×
Rs)
L
H
VREF / (25
×
Rs)
H
H
0
VCC-PWR2
24VA
M
PH_B+
THPF_DA
THPF_I01
THPF_I11
THPF_PH1
THPF_PH2
THPF_I12
THPF_I02
PH_A-
PH_B-
PH_A+
THPF_I01
THPF_PH2
THPF_I11
THPF_PH1
THPF_I12
THPF_I02
THPF_DA
C71
D37
D35
D34
D33
R139
J5
U19
OUT1A
17
E1
16
SENSE1
15
OUT1B
14
I01
13
I11
12
VREF1
10
PHASE1
11
RC1
9
OUT2A
20
E2
21
SENSE2
22
OUT2B
23
I02
1
I12
2
VREF2
4
PHASE2
3
RC2
5
G
6
G
7
G
19
G
18
VCC
8
VBB
24
J1
R142
C63
R138
C64
C65
R141
C78
C77
A2
R136
U18
G
I
O
C70
R137
A1
WIRE LAND
C74
C75
Summary of Contents for TM-H6000
Page 1: ...Confidential Service manual TM H6000 H6000P English 401040800 Issued Date 199 Issued by ...
Page 29: ...1 20 Troubleshooting Rev A Confidential ...
Page 69: ...Disassembly and Assembly 2 40 Rev A Confidential ...
Page 81: ...3 12 Adjusting Rev A Confidential ...
Page 83: ...Appendix A 2 Service Tools and Lubricants Rev A Confidential ...
Page 87: ...Appendix B 4 Maintenance Rev A Confidential ...
Page 225: ...I 10 Printer Handling Rev A Confidential ...
Page 227: ...Appendix J 2 Screw Types Rev A Confidential ...
Page 229: ...K 2 Parts Layout Rev A Confidential Main Circuit Board Unit solder side memory board ...