2
UP-895/(E)
4-4.
System Control Section ............................................................................... 4-8
4-4-1.
Reading of Keys ......................................................................... 4-8
4-4-2.
Reading of Function Switches ................................................... 4-8
4-4-3.
Platen Motor Control .................................................................. 4-9
4-4-4.
Head Up and Down Control ..................................................... 4-10
4-4-5.
Monitor of Door Sensor ........................................................... 4-10
4-4-6.
Monitor of Paper Sensor .......................................................... 4-10
4-4-7.
Monitor of Head Temperature Sensor ...................................... 4-11
4-4-8.
Control of Head Fan Motor (for Head Cooling) ...................... 4-11
4-4-9.
Control of Video Circuit Section ............................................. 4-11
4-4-10. Control of Memory and Head Control Circuit ......................... 4-12
4-4-11. Gamma Correction and Thermal Storage Correction .............. 4-13
4-4-12. Discrimination of Video Signal to be Input ............................. 4-13
4-4-13. Remote Interface ...................................................................... 4-13
4-4-14. Storage of Print Count History ................................................. 4-13
4-5.
Thermal Head Section ............................................................................... 4-14
4-5-1.
Structure ................................................................................... 4-14
4-5-2.
Basic Operation ........................................................................ 4-15
4-5-3.
Stair Generation ....................................................................... 4-15
4-5-4.
Temperature Correction ........................................................... 4-16
4-5-5.
Line Count Correction .............................................................. 4-16
5. Troubleshooting
5-1.
Print is Faulty .............................................................................................. 5-1
5-2.
Print is Too Dark or Too Light ................................................................... 5-2
5-3.
“Paper Sensor” is Out of Order ................................................................... 5-3
5-4.
Head Operation (Up & Down) is Out of Order ........................................... 5-4
5-5.
Paper Feeding is Out of Order .................................................................... 5-5
5-6.
Door (Opening and Closing) is Out of Order .............................................. 5-6
6. Service Mode (Self-diagnostic Function)
6-1
Printing the Test Pattern .............................................................................. 6-1
6-2.
Up/Down Operation of Head ...................................................................... 6-2
6-3.
Feed Operation ............................................................................................ 6-2
6-4.
Display and Clearing of Print Sheet History ............................................... 6-3
7. Semiconductor Pin Assignments
Summary of Contents for UP-895
Page 1: ...VIDEO GRAPHIC PRINTER UP 895 UP 895CE UP 895MD SERVICE MANUAL 1st Edition ...
Page 6: ......
Page 26: ......
Page 52: ......
Page 71: ...10 1 UP 895 E 10 1 2 3 4 5 1 A B C D E F G H Section 10 Schematic Diagrams and Board Layouts ...
Page 82: ......