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BIXOLON 352plusA manual

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Table of contents for the manual

  • Page 1

    Service Manual SRP-350/352plusA&C Thermal Printer Rev . 2.01 http://www .samsungminiprinters.com[...]

  • Page 2

    Rev. 2.01 - 2 - SRP-350/352plusA&C ■ Table of Contents 1. Precaution Segment .......................................................................................................... .......................... 4 1-1 Safety Pr ecautions ......................................................................................................... .[...]

  • Page 3

    Rev. 2.01 - 3 - SRP-350/352plusA&C 4. Hard ware .................................................................................................................................................... 32 4-1 Wiring Diagram ...............................................................................................................................[...]

  • Page 4

    Rev. 2.01 - 4 - SRP-350/352plusA&C 1. Precaution Segment 1-1 Safety Precautions 1. Be sure that all of the built-in protective devices are replaced. Restore an y missing protective shields. 2. When reinstalling the chassis and its assemblies, be sure to restore all p rotective devices includi ng: nonmetallic control knobs and compartment covers[...]

  • Page 5

    Rev. 2.01 - 5 - SRP-350/352plusA&C 1-2 Servicing Precaution WARNING 1: First read the Safety Precauti on section of this manual. If some unforeseen circumstance creates a conflict between the serv icing and safety precautions, alw ays follo w the safety precaution. WARNING 2: An electroly tic capacitor insta lled with the wrong polarity might e[...]

  • Page 6

    Rev. 2.01 - 6 - SRP-350/352plusA&C 1-3 Precaution for Electrost atically Sensitive Devices (ESDs) 1. Some semiconductor (solid state) devices are easil y damaged by static electricit y. Such components are called Electrostatically Sensitive Devic es (ESDs); exampl e s include integrated circu its and some field-effect transistors. The following[...]

  • Page 7

    Rev. 2.01 - 7 - SRP-350/352plusA&C 2. Inst allation and Operation 2-1 Inst allation 2-1-1 AC Adapter Installation 2-1-2 Interface Cable Installation Figure 2-1 AC Adapter Installation 1. Mack sure the printer is turned off with the side of the switch. 2. Plug the DC cord connector into the po wer jack on the printer . (Plug the flat side down) [...]

  • Page 8

    Rev. 2.01 - 8 - SRP-350/352plusA&C 2-1-5 Wall Mount Installation 1. Remove the three screw from the bottom of The Case lower . Separate the Case lower From the Main body . 2. Attach the Plate-S pring to the right side of Frame-body and tighten a scre w as illustrated . 3. After assembling the Ca se lower to set Body , T urn the Set over and att[...]

  • Page 9

    Rev. 2.01 - 9 - SRP-350/352plusA&C 5. Be sure that the BRKT attached properly to match the direction of arro w as follow . and the BRKT Mount should be always fixe d vertically .[...]

  • Page 10

    Rev. 2.01 - 10 - SRP-350/352plusA&C 2-2 Operation 2-2-1 Setting the DIP s w itches The DIP switches are located on the bottom of the printer . The DIP switches are us ed to set the printer to perform various functions. Follow these when changing DIP switches setting : 1. T urn the printer power switch off. 2. Remove the screw on the botto m of [...]

  • Page 11

    Rev. 2.01 - 11 - SRP-350/352plusA&C 2-2-3 Setting the DIP s w itch (IEEE1284 Parallel, USB Interface ) • DIP Switch 1 SW Function ON OFF Default 1-1 Auto Line Feed Enable Disable OFF 1-2 ~ 1-8 Reserved - - OFF • DIP Switch 2 SW Functio n ON OFF Default 2-1 Reserved - - OFF 2-2 Internal bell control Internal bell disable Internal bell enable[...]

  • Page 12

    Rev. 2.01 - 12 - SRP-350/352plusA&C 2-2-4 Hexadecimal Dumping This feature allows experience d users to see exactly what data is coming to the printer . This can be useful in finding software problem s. when you turn on the hexadec imal dump function, the printer print s all commands and data in h exadecimal format along with a guide section to[...]

  • Page 13

    Rev. 2.01 - 13 - SRP-350/352plusA&C SRP-350plu s VER.6.02 S TD 2007.04.17 ================================ DIP SWITCH SW1/SW2 ST A TUS DIP SW1 12345678 O N : *** OFF : ***** DIP SW1 12345678 O N : O F F : ** ****** MEMORY SWITCH ST A TUS MSW1 123 45678 MSW2 123 45678 (C odepage Selection) MSW8 123 45678 (R eserved) MSW9 123 45678 (R eserved) MS[...]

  • Page 14

    Rev. 2.01 - 14 - SRP-350/352plusA&C 2-2-6 Setting the Memory S w itches This printer has Memory Switch set which is so ftwa re switches. Memory Switch set has MS W1, MSW2,MSW8, MSW9,MSW10,MS W1 1,Customize value. Memory Switch setting utility can change the Memory Swit ch set to ON or OFF as shown in the table belo w (default : all OFF) : Setti[...]

  • Page 15

    Rev. 2.01 - 15 - SRP-350/352plusA&C MSW8 Switch Function ON OFF 1~8 Reserved -- Fixed to OFF MSW9 Switch Function ON OFF 1~8 Reserved -- Fixed to OFF MSW10 (S pecial Function 1) Switch Function ON OFF 1 External buzzer control (This functions operate onl y after cutting) External buzzer enable External buzzer disable 2~4 Reserved -- Fixed to OF[...]

  • Page 16

    Rev. 2.01 - 16 - SRP-350/352plusA&C 3. Product S pecifi cations 3-1 Appearance 3-1-1 Printer Dimensions (mm) Figure 3-1 Printer Dimension 3-1-2 AC Adapter Dimensions (mm) Figure 3-2 Adapter Dimension 115mm 65mm 35mm SRP-350plus SRP-352plus[...]

  • Page 17

    Rev. 2.01 - 17 - SRP-350/352plusA&C 3-1-3 Feature Locations-SRP-350/352plusA/C TYP E 1. Cover-Open 2. Case -Upper 3. Case -Lower 4. Label-Control 5. Push Button 6. Cover-Cutter 7. Power Button 8. Bracket Di p Switch 9a. Parallel interface(IEEE-1284) 9b. Serial interface(RS-232C) 9c. Ethernet interface(10BASE T) 9d. - 10. DC Power Jack 11. Draw [...]

  • Page 18

    Rev. 2.01 - 18 - SRP-350/352plusA&C 3-2 General S pecifications Item Description Remark Product • SRP-350/352plusCOS : RS-232 Serial Communicatio n • SRP-350/352plusCOP : IEEE1284 Parallel Commun ication • SRP-350/352plusCO : USB Communication • SRP-350/352plusCOE : Ethernet Processor • NEC UPD70F3107AGJ(32 Bit) Internal ROM Size : 25[...]

  • Page 19

    Rev. 2.01 - 19 - SRP-350/352plusA&C 3-3 Thermal Printer S pecifications 3-3-1 Printer Specification 1) 180dpi Item Description Remark Model • SRP-350plusA/C(TPH : AG072-H7E817,AOI Electronoics) Print Method • Thermal Line Printing Dot Density • 0.141 mm (7.09 Dots/mm) Printing Direction • Unidirection with friction feed Printing Width ?[...]

  • Page 20

    Rev. 2.01 - 20 - SRP-350/352plusA&C 3-3-3 Paper Specification Item Description Remark Paper Type • Mono :TF50KS-E(Nippon pape r) • 2Color : PB-70(Mitsubishi) Paper Form • Paper Roll Paper Width • 80mm(+0,-0.5) Paper Roll Size • Max 83mm(3.26”) Spool Inside Dia. • 12mm (0.47) Spool Outside Dia. • 18mm (0.71) T able 3-5 Thermal Pr[...]

  • Page 21

    Rev. 2.01 - 21 - SRP-350/352plusA&C 3-3-5 Printable Area a d c e Figure 3-4 Printable Area 1) 180dpi Item Description Remark a 80±0.5mm(3.15 ±0.0197) b 0.141 (0.0056 ) c 72±0.2mm(2.83 ±0.0079) d 2.75mm~4.25mm e 2.75mm~4.25mm Dots 512 Font 9X24 56 Character Font 12X24 42 Character * ‘d’ & ‘e’ position can be shifted while printin[...]

  • Page 22

    Rev. 2.01 - 22 - SRP-350/352plusA&C Item Maximum Unit Conditions Print Cycle (S.L.T .) 0.71 ml/Line Supply Energy 0.44 mJ/Dot Ts u b = 2 5 ℃ Supply V oltage 26.4 V Vp < 28.0V (Vp : Peak of VH) Substrate T emperature 70 ℃ Thermister T emperature Number of heating dot s at same time 256 Dots Logic Supply V oltage (Vdd) 5.25 V Include Peak [...]

  • Page 23

    Rev. 2.01 - 23 - SRP-350/352plusA&C 3-4 SMPS Specifications 3-4-1 SMPS (Switching Mode Power Supply ) Specification Item Description Remark Input V oltage • Typical : 100V ~ 240V AC • Min : 90V AC • Max : 264V ac Input Current • Max : 1.5A (When 120V), 0.75A (When 230V) In rush Current • Max : 40A (Peak to Peak) Line Regulation • +2[...]

  • Page 24

    Rev. 2.01 - 24 - SRP-350/352plusA&C 3-5 Interface S pecifications 3-5-1 RS-232 C Serial Interface 3-5-1(a) Spe cification Item Description Remark Data T ransmission • Serial Synchronization • Asynchronous HandShak ing (Flow Control) • H/W : DTR/DSR • S/W : XON/XOFF XON : ASC Code 1 1h XOFF:ASC Code 13h Signal Level • Logic1 (MARK) : -[...]

  • Page 25

    Rev. 2.01 - 25 - SRP-350/352plusA&C 3-5-1(c) Cable Connection Figure 3-7 RS-232C Cable Con nection 3-5-1(d) Signal Description Pin No. Signal Name Signal Direction Function BODY Frame GND - Frame Ground 2 TXD Output T ransmit Data 3 RXD Input Receive Data 6 DSR Input This signal indicates whether t he host co mputer can receive data. (H/W flow [...]

  • Page 26

    Rev. 2.01 - 26 - SRP-350/352plusA&C 3-5-1(e) H/W Flow Control When DTR/DSR flow co ntrol is selec t, before transmitting a dat a, the Printer checks whether the host is BUSY or not. If the host is BUSY , t he Printer does not transmit a dat a to the host. If the host is not BUSY , the Printer transmits a dat a to the Host. The host is the same.[...]

  • Page 27

    Rev. 2.01 - 27 - SRP-350/352plusA&C 3-5-2(c) Signal Specificati on (Compa tibility/Nibble/Byte mode) Pin No. Source Compatibility Mode Nibble Mode Byte Mode 1 Host nS trobe HostClk HostClk 2 Host / Printer Data 0 (LSB) - Data 0 (LSB) 3 Host / Printer Dat a 1 - Data 1 4 Host / Printer Dat a 2 - Data 2 5 Host / Printer Dat a 3 - Data 3 6 Host / P[...]

  • Page 28

    Rev. 2.01 - 28 - SRP-350/352plusA&C 3-5-3 USB2.0 Interfa ce SRP-350plus support the USB (Unive rsal Serial Bus) Serial Communication. 3-5-3(a) Spe cification Item Description Remark T r ansfer T yp e • BULK Data Signal • Bi-direction, Half-Duplex • Differential Signal Pair (D+ / D-) Data Form at • NRZI Form at • Zero Bit Stuffing afte[...]

  • Page 29

    Rev. 2.01 - 29 - SRP-350/352plusA&C Figure 3-9 USB Cable 3-5-4(d) Construction Raw materials used in the fabrication of this cable must be of such quality that the fabricated cable is capable of meeting or exceedin g the mechanical and elec trical performance criteria of the most current USB Specification revision and all applicable domestic an[...]

  • Page 30

    Rev. 2.01 - 30 - SRP-350/352plusA&C ※ Note: Mini mum conductor construction must be stran ded tinned copper. To minimize end user termination problems, USB uses a keyed connector protocol. The p h ysical difference in the Series A and B connectors insure s proper end user connectiv ity. The A connector is the principle means of connecting USB[...]

  • Page 31

    Rev. 2.01 - 31 - SRP-350/352plusA&C 3-6 Cash Drawer S pecifications 3-6-1 Dra w er Cable Ferrite Core : 1 turn (OP-18E : 18.2 x 12.5 x 25.5) Figure 3-1 1 Drawer Cable 3-6-2 Cable Connection Pin No. Description Direction 1 Frame GND - 2 Drawer Kick-Out Driver Signal #1 Output 3 Drawer Open / Close Sign al Input 4 +24V - 5 Drawer Kick-Out Driver [...]

  • Page 32

    Rev. 2.01 - 32 - SRP-350/352plusA&C 4. Hardware 4-1 Wiring Diagram Pin Assignment : Refer to the Schematic Diagram MAIN PBA (TOP VIEW) 3 1 2 4 5 6 CN11 PANNEL PBA 3 1 2 CN13 PAPER END SENSOR 3 1 4 2 5 6 THERMAL PRINTER HEAD 16 17 15 13 11 9 7 21 19 14 12 10 8 20 18 CN 8 AUTO CUTTER 3 1 4 2 CN 7 3 1 2 4 FEED MOTOR CN 6 POWER SWITCH 1 2 CN 1 POWE[...]

  • Page 33

    Rev. 2.01 - 33 - SRP-350/352plusA&C 4-2 Block Diagram POWER ADAPTER +24VDC POWER SUPPLY CIRCUIT VPP(+24V) VTH(+24V) VCC(+5V) RESET CIRCUIT +3.3V +2.5V +3.3V FLACH M29W160EB SRAM K6R4008V1D BUZZER BUZZER CIRCUIT DIP SWITCH DIP SWITCH CIRCUIT DRAWER & COMPULSORY SWITCH DRIVER MCU uPD70F3170 CLOCK 5MHz RS-232 DRIVER RS-232 CON. IEEE-1284 DRIVE[...]

  • Page 34

    Rev. 2.01 - 34 - SRP-350/352plusA&C 4-3 S pecial Circuit Descriptions 4-3-1 Power Circuit This system is operated un der 100V ac or 240V ac. Th e pow er circuit supplies the three dif ferential DC voltage sources. [Figure 4-3 Power Block Di agram] 1) Drawer Driv ing and Feed, Auto Cutter Motor V ol t age, TPH Driving V olt age : +24VDC +24VDC i[...]

  • Page 35

    Rev. 2.01 - 35 - SRP-350/352plusA&C 4-3-2 RESET Circuit Reset signal is signal in order to st art-up CPU under Power-on. Reset circuit uses a reset ASM81 1REUSF-T(U8). When 3.3Vdc is fallen under 2.7Vdc by Power-off, reset signal prohibit s the system from miss-operating by lowering down to 0V . [Figure 4-4 Reset Block Diagram] [Figure 4-5 Rese[...]

  • Page 36

    Rev. 2.01 - 36 - SRP-350/352plusA&C 4-3-3 Buzzer and Cash Dra w er Circuits 1) Buzzer Driving Circuit The Buzzer is used to inform several kinds of stat e s which occur under system o perating and gives some information to users by controlling the P86 of CPU (UP D70F3107) [Figure 4-6 Buzzer Block Diag ram] 2) Cash Drawer Driv ing Circuit The ci[...]

  • Page 37

    Rev. 2.01 - 37 - SRP-350/352plusA&C 4-3-4 I/F PBA Detect Block Diagr am When the printer is ON, the printer ch ecks what kind of the I/F PBA is installed. After detection, the CPU specify the I/O port properly . The followi ng is the method of I/F PBA detection. The I/F PBA has the three return Signal (MD0~2). The CPU recognize the I/F PBA by t[...]

  • Page 38

    Rev. 2.01 - 38 - SRP-350/352plusA&C 4-3-6 Parallel Communication Block Diagram The printer support the bidirectional Parallel In terface with Centroni cs, Nibble, Byte Mode. The Centronics i s Forward and the Nibble, Byte are reverse Mode. [Figure 4-10 IEEE1284 Communi cation Block Diagram] 4-3-7 USB Communication Block Diagram The printer supp[...]

  • Page 39

    Rev. 2.01 - 39 - SRP-350/352plusA&C 4-3-8 DIP Switch Circuit The key board circuit consist of the scan signal of 3 lines and the ret urn signal of 2-line. The CPU sends repeatedly and continuousl y the scan data DIP_A~DIP . The DIP S/W information input in the return sig nal if the specific DIP S/W is ON status during the giv en time. The CPU r[...]

  • Page 40

    Rev. 2.01 - 40 - SRP-350/352plusA&C 4-3-9 Thermal Printer Head Circuit First, the CPU sends a Serial Clo ck and Serial Dat a 2 56Bits(32Bytes) to the Shif t Register of the Thermal Printer . The Serial Dat a are stored to each Shift Regi ster in the The rmal Printer . Because the Dat a#1 Pin and the Data#2 pi n are shorted on Main PCB, the Data[...]

  • Page 41

    Rev. 2.01 - 41 - SRP-350/352plusA&C 5. Disassembly and Assembly 5-1 Case lower block Scrw (3x8) 1 Foot Rubber 4 Brkt Dip Switch 2 Case Lower 3 1.Remove the three screw . 2.S parate the BRKT Dip switch, Case lower , Foot-Rubber from the Printer . 1.Remove the connector wires from main PBA and sub Assembly .[...]

  • Page 42

    Rev. 2.01 - 42 - SRP-350/352plusA&C Screw (3x6) 7 Main PCB 6 PCB Serial (Parallel, 485) 5 Brkt Serial (Parallel, 485) 3 Brkt PCB 2 Screw Screw Screw 4 Screw (3x6) 1 8 8 Case Lower Cover Cabel 2 1 1.Remove the Screws form the BRKT PBA. 2.Separate the BRKT Interfac e. 3.Remove the two screws. 4.Separate the BRKT Interfac e from the I/F PBA A ssem[...]

  • Page 43

    Rev. 2.01 - 43 - SRP-350/352plusA&C 5-2 Case Upper block 1.Push the button to open the Cove Open. 2.Remove the four screws. 3.Separate the Cover o pen. 4.Separate the Cover cutter . 5.Remove the screws. 1.Remove the two screws. 2.Lift the Case upper in the direction of an arrow during pushing the Push button. 3.Remove the three screws. 4.Separa[...]

  • Page 44

    Rev. 2.01 - 44 - SRP-350/352plusA&C 1.Remove the E-Ring. 2.Separate the S pring tension, the Shaft hinge and the E-Ring. 3.Remove the E-Ring. 4.Separate the Bushin g and the Roller Platen Assembly . Spring Hook 1 Brkt-Hook 4 2 Screw (3x4.4) 3 1.Remove the S p ring Hook, two screws. 2.Separate the BRKT Hook.[...]

  • Page 45

    Rev. 2.01 - 45 - SRP-350/352plusA&C 5-3 Frame block Screw (3x6) 6 Cov er Housing 3 Cov er Plate 7 Screw (3x4) 1 2 Fix ed Cutter Cutter Blade 5 Screw (3x4) 4 1.Remove the three screws. 2.Separate the Fixed-cutter from the Cover Housing. 3.Remove the two screws. 4.Separate the Cutter Blade from Fixed-cutter . 5.Remove the two screws. 6.Separate t[...]

  • Page 46

    Rev. 2.01 - 46 - SRP-350/352plusA&C Screw 1 Heatsink Assy 2 1.Remove the screw . 2.Push the Heat-sink Assembly in the direction of an arrow and Separate it. Screw (3x4) 4 Plate ground 2 Brkt TPH Rear Heat Sink 6 Screw (3x4) 1 Spring TPH 5 Connector 7 3 1.Remove the screw . 2.Separate the Plate-groun d and BRKT TPH Rear . 3.Remover the two screw[...]

  • Page 47

    Rev. 2.01 - 47 - SRP-350/352plusA&C Screw (3x8) 1 2 3 Brkt PCB 4 Power Switch Frame Main 1.Remove the two screws. 2.Separate the Fram e Main from the BRKT PCB. 3.Separate the Power Switch from the BRKT PCB. 2 Control Board 1 Screw (3x8) 13 Plate-Spring 3 14 Screw (3x8) 11 Screw (3x8) 6 Screw (3x8) 8 Push Button 7 Button Assy 10 Guide Button 12 [...]

  • Page 48

    Rev. 2.01 - 48 - SRP-350/352plusA&C 6. Adjustment s and Maintenance 6-1 Adjustment 6-1-1 Remaining Roll Paper Adjustment This sensor is set to the step3 po sition at the fact ory. If you find that there is not or too enough paper remaining on the roll when the near-end sensor is triggered, you can cha nge the setting to the upper or Lower posit[...]

  • Page 49

    Rev. 2.01 - 49 - SRP-350/352plusA&C 6-1-2 Paper Jam If the paper jam occur, the Buzzer will b eep. If the cover-open can be opened, open the Cover-open and remove the pape r. If the Cover-open can not be opened, Follow the bel ow. 1. T urn the printer on to make the cutter initialized, and then open the cover-open. 2. In case that the cutter is[...]

  • Page 50

    Rev. 2.01 - 50 - SRP-350/352plusA&C 6-2 Maintenance Paper dust in the heating element s may lower the print quality . In this case, clean the print head as follow; ※ Caution: T urn off the printer po w er before cleaning. ※ Caution: Note that the thermal hea d (Thermal element and Radiation plate) becomes very hot during normal operation, c[...]

  • Page 51

    Rev. 2.01 - 51 - SRP-350/352plusA&C 7. T roubleshooting This chapter describe s the methods for troubleshooting in this Receipt Printer . 7-1 Power Problem Po we r O u t O k? O n S MP S Po we r V D R ( +24V ) O k? Po we r V T PH ( +24V ) O k? Po we r V C C ( + 5 V ) O k? End 1. Check the Input/Output P ower Cable 2. Replace th e Adapter(SMPS) 1[...]

  • Page 52

    Rev. 2.01 - 52 - SRP-350/352plusA&C 7-2 System Problem Clock Signal Ok? Progr am Ok? CPU Ok? End 1. Check the Frequency (5MHz) 2. Check the related Circuit & P attern on PCB 1. Check the Address/Data Line P attern 2. Check the related Circuit & P attern on PCB 3. Progr am d ownload again 1. Check the Main Clock (5MHz) 2. Check the Addre[...]

  • Page 53

    Rev. 2.01 - 53 - SRP-350/352plusA&C 7-3 Panel PBA and Sensor Problem F eed S/W Ok? Cover Open S/ W O k? End 1. Check the F eed S/W Signal on Main PBA 2. Check the Harness 3. Check the related Circuit ,P attern & Component 1. Check the Cover S/W Signal on Main PBA 2. Check the Harness 3. Check the related Circuit ,P attern & Component Pa[...]

  • Page 54

    Rev. 2.01 - 54 - SRP-350/352plusA&C 7-4 Thermal Printer Head and Feed Motor Problem Po we r V C C VTPH Ok? End 1. Ref er to the P ower Problem 2. Check the Harness Thermal Printer Head Problem N Y Control Signal Ok? 1. Check the Control Signal on CPU (Data / CLK / Latch / St robe 1, Strobe 2) 2. Check the Harness 3. Check the related Cir cuit &[...]

  • Page 55

    Rev. 2.01 - 55 - SRP-350/352plusA&C 7-5 Auto Cutter and Drawer Problem Auto Cutter S / W Ok? End 1. Check the Signal on CPU 2. Check the Harness 3. Check the Micro S/W in the A uto Cu tter Assembl y Auto Cutter Problem N Y Auto Cutter OK? 1. Check the Signal on CPU 2. Check the Output Signal of U13 (T A8428K) 3. Check the Harness 4. Check the A[...]

  • Page 56

    Rev. 2.01 - 56 - SRP-350/352plusA&C 7-6 Dip S/W and I/F PBA Select Problem Dip S/W Input Ok? End 1. Check the Output Signal (DIP_A~C) 2. Check the Input Signal (DIP_IN1~IN2) 3. Check the related Circuit & P attern Dip Switch Problem N Y I/F PBA Select Ok? End 1. Check the Diode on I/F PBA 2. Check the Input Signal (MD0*~MD2*) 3. Check the r[...]

  • Page 57

    Rev. 2.01 - 57 - SRP-350/352plusA&C 7-7 RS-232C Serial Communication Problem Communication F ailure? End 1. Check the connection of the RS-232C Connector and Other side 2. Check the I/F Cable whether it is open or short 3. Check the Txd, Rxd Pin on CPU 4. Check the MAX232 Driving Chip and related Circuit on I/F PBA 5. Check whether Signal is af[...]

  • Page 58

    Rev. 2.01 - 58 - SRP-350/352plusA&C 7-8 IEEE-1284 Parallel Communication Problem F orw ard Mode F ailure? End 1. Check the Control Line (/CS_P) 2. Check the 1284 Control Line and Status Line 3. Check the Signal of ICs (U1,U3,U4 ,U5) 4. Check the 1284 Cable whether it is open or sh ot 5. Check the related Circuit & P attern on I/F PBA IEEE-1[...]

  • Page 59

    Rev. 2.01 - 59 - SRP-350/352plusA&C 7-9 USB2.0 Communication Problem Main PBA I/F F ailure? End 1. Check the Control Line & Signal (/CS_U,/RD ,/L WR,USB_/IRQ) 2. Check the Data Line and Signal 3. Check the Connector (34P) 4. Check the Clock (30MHz) 5. Check the related Circuit & P attern on Main PBA USB Problem Y N Rev er se Mod e F ail[...]