Sony UP-895 - Page 4

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