The Speaker Company TTP 248M service manual Sdram

Page 28

TTP-248M Bar Code Printer

Service Manual

0xA8100000

Ribbon Near End Data Register

 

 

(1 byte)

 

0xA8200000

Centronics Data Register

 

 

(1 byte)

 

0xA8300000

TPH Data Area 1 Register

 

 

(1 byte)

 

0xA8400000

TPH Data Area 2 Register

 

 

(1 byte)

 

0xA8500000

TPH Data Area 3 Register

 

 

(1 byte)

 

0xA8600000

TPH Data Area 4 Register

 

 

(1 byte)

 

0xA8700000

Cutter Control Register

Bit 0: Power

 

(1 byte)

Bit 1: Direction

 

 

0:Backward

 

 

1:Forward

0xA8800000

N/C

 

 

 

0xA88FFFFF

 

 

0xA8900000

LCD Control Register

Bit 0: LCD CS1

 

(1 byte)

Bit 1: LCD CS2

 

 

Bit 2: LCD OP

 

 

Bit 3: LCD

 

 

Power

 

 

Bit 4: LCD R/W

 

 

Bit 5: LCD

 

 

Enable

0xA8A00000

LCD Data

 

 

(1 byte)

 

0xAC000000

SDRAM

Area 3(/CS3)

 

 

0xAC3FFFFF

 

 

0xB0000000

N/C

Area 4(/CS4)

 

 

0xB3FFFFF

 

 

0xB4000000

N/C

Area 5(/CS5)

 

 

0xB7FFFFF

 

 

0xB8000000

N/C

Area 6(/CS6)

 

 

0xBBFFFFF

 

 

0xBC000000

N/C

Reserved Area

 

 

0xBFFFFFF

 

 

 

Table 2.

 

25

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Contents TTP 248M Table of Content TTP-248M Bar Code PrinterTTP-248M Bar Code Printer Foundamentals about the System Printer OverviewTTP-248M Bar Code Printer Pinter Specification SpecificationCommunication Interface Available Bar Codes Text Specification File Head of Font Fixed 32bytes BF3~4 VF3~4 Specification Types of PaperTTP-248M Bar Code Printer Ribbon Specification Circuit Description MCUMCU MCU PIN Description Page Page Page Page Page Page Page Page TTP-248M Bar Code Printer Reset Circuit Reset CircuitTTP-248M Bar Code Printer Memory System Etro N TechDecoder Circuits Memory Address MapUse by CPU Area Internal I/O Sdram TTP-248M Bar Code Printer Firmware Address Map TTP-248M Bar Code Printer Power Down Sensor VCCTTP-248M Bar Code Printer Print Head GNDMotor System Circuit Stepping Motor PatternTTP-248M Bar Code Printer Sensor Circuits Ribbon Near End Sensor10 Black mark/ Gap Sensor Circuit Peel-off Sensor 11 Peel-off Sensor Circuit Case Sensor Serial Port Circuit GND VDDParallel Port Circuit VDDTTP-248M Bar Code Printer Cutter Drive System 17 Cutter Drive CircuitTTP-248M Bar Code Printer PIN Switch Circuits Connector Circuits21 Memory Card Connector 23 Stepping Motor Connector TTP-248M Bar Code Printer Optional Items Circuits Optional Item---BuzzerMachanism Remove the Covers and LCD PanelLoosen the three screws on Top Left Side Cover Screw LCD Panel Lower Front Cover TTP-248M Bar Code Printer Replacing the Mainboard TTP-248M Bar Code Printer Replacing the Power Supply Unit Belt Ring of Label Rewind Spindle Remove the E-ring of pulley. And then, remove the pulley TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Ribbon Supply Spindle TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Label Supply Spindle TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Label Rewind Spindle TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Platen Remove the Platen and Left Shaft Bearing TTP-248M Bar Code Printer Replacing Motor TTP-248M Bar Code Printer TTP-248M Bar Code Printer Replacing Print Head Remove the 2 screws these are on the TPH switch plate Remove A.B.C.D in order Loosen M4 screw, knob E and F TTP-248M Bar Code Printer Replacing Gap/Black Mark Sensor TTP-248M Bar Code Printer Reassemble in the reverse procedures after replacing Curly plastic pipe Screws Troubleshooting TroubleshootingCalibrate Gap/Black Mark Sensor Flash / DramTTP-248M Bar Code Printer Self-test Diagnosis Operation ProcedureDram Clear TTP-248M Bar Code Printer Cleaning Print Head Update History No.35, Sec , Ligong 1st Rd., Wujie Township