Appendix D-64
Product Overview
Rev. A
Confidential
Thermal Head Drive Circuit
Printing is performed by applying voltage to the heating element resistor in the thermal head.
The GA (U30) controls all data transfers to the thermal head, and also controls the energizing
pulse. Firmware gives instructions to the GA, but data transfers and drive pulses are performed
automatically by the GA. Due to the circuit configuration, the six signal lines on the left side (all
controlled by GA) perform data transfers.
Figure D-63
VCC
VCC
VCC
VCC
24VA
TM2
/STB1
/STB2
GND
CLK
GND
VH
/LAT
GND
GND
GND
VH
VH_1
TM1
VH
VDD
VH_1
GND
DI2
VH_1
DI1
TH_STB2
TH_D2
TH_D1
TH_THERM
TH_STB1
TH_SCLK
TH_LAT
R121
U21
C83
1
2
L8
R128
R127
C80
L10
U20
1
2
3
4
5
6
7
8
R126
R130
L11
R140
C82
1
2
C59
R132
L7
CN22
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
D38
R135
R143
C72
R131
C67
R134
C84
1
2
C68
D36
R145
2
R129
L4
C76
C60
C58
R125
C73
R124
R122
R123
C69
C79
L9
C81
L5
C61
C66
R120
L6
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 ...