Appendix D-70
Product Overview
Rev. A
Confidential
The circuit configuration is shown below. All lamps turn on when the signal outputs the HIGH
status.
Figure D-68
Types of Switches
The printer has two switches. As shown by the circuit for the display functions in the previous
section, input is enabled by two signals (SW_SLIP, SW_RPT). LOW status is input when the
panel switch is pressed. HIGH is input when the switch is not pressed.
Malfunction Protective Circuit
This printer has the following three malfunction protection functions:
❏
GA operation monitor
The CPU (U3) monitors GA clock oscillation. The CPU firmware reads a specific GA register at
an arbitrary time, and compares that value with the value previously read. If the results of the
comparison are different, the system is judged to be operating normally. The GA changes the
register value using clock oscillation. Therefore, if it is operating normally, the register value
continuously changes.
❏
CPU operation monitor
CPU runaway causes a WDT (watch dog timer) overflow, resulting in output of LOW status
from the CPU WDT output terminal. This is connected to the GA TIMI input terminal, and
when the GA detects the LOW status for a certain time, it goes to the reset status and is not
restored.
VCC
VCC
LED_PAPER
LED_SLIP
LED_ERROR
LED_POWER
SW_RPT
SW_SLIP
C13
C14
CN6
1
2
3
4
5
6
7
8
Q3
Q4
Q6
R178
R30
R31
R28
R179
R181
R29
R180
Q58
Содержание TM-H6000
Страница 1: ...Confidential Service manual TM H6000 H6000P English 401040800 Issued Date 199 Issued by ...
Страница 29: ...1 20 Troubleshooting Rev A Confidential ...
Страница 69: ...Disassembly and Assembly 2 40 Rev A Confidential ...
Страница 81: ...3 12 Adjusting Rev A Confidential ...
Страница 83: ...Appendix A 2 Service Tools and Lubricants Rev A Confidential ...
Страница 87: ...Appendix B 4 Maintenance Rev A Confidential ...
Страница 204: ...Confidential Rev A General Lubrication Points Diagrams Appendix G 5 TM H6000 H6000P Service Manual PF Assembly G 36 ...
Страница 225: ...I 10 Printer Handling Rev A Confidential ...
Страница 227: ...Appendix J 2 Screw Types Rev A Confidential ...
Страница 229: ...K 2 Parts Layout Rev A Confidential Main Circuit Board Unit solder side memory board ...
Страница 231: ...K 4 Parts Layout Rev A Confidential ...
Страница 232: ...SEIKO EPSON CORPORATION Printed in Japan ...