42
C H A P T E R 4 L O C AT I N G T H E P R O B L E M
Refer to the following to prevent incorrect cash drawer status detection by the system:
Port
I/O Port Address
Bit
Condition
Note
Control port
40B9
3
High(1) → Close
Low(0) → Open
If bit7 is set to Low to open the cash
drawer, after it must be set back to
High to prevent the system as always
detecting the drawer as open.
Status port
40B9
2
High(1) → Close
Low(0) → Open
LCD symptoms
Symptom
Corrective Procedure
LCD backlight is not working but text is still visible on
•
screen
Reseat the LCD cable.
1.
Reseat the inverter cables.
2.
Replace the inverter cables.
3.
Replace the inverter.
4.
LCD backlight is working but text is not visible on screen
•
Reseat the LCD cable.
1.
Reseat the inverter cables.
2.
Replace the LCD.
3.
LCD screen is garbled
•
Characters are missing pixels
•
Screen is distorted
•
Screen displays wrong color
•
Screen displays extra vertical/horizontal lines
•
Reseat the LCD cable.
1.
Replace the inverter cables.
2.
Replace the LCD panel.
3.
Replace the mainboard.
4.
Connecting a
Figure 4.1
cash drawer
Turn on the machine .
2.
Cashdrawer
Summary of Contents for PT-6200
Page 1: ...PT 6200 Service Manual...
Page 2: ......
Page 8: ...vi...
Page 34: ...26 C H A P T E R 2 B I O S S E T U P...
Page 41: ...33 Click 4 Yes I want to restart my computer now and then click Finish...
Page 43: ...35 When installation is completed click 4 Finish...
Page 66: ...58 C H A P T E R 5 R E P L A C I N G F I E L D R E P L A C E A B L E U N I T S F R U s...