BIXOLON SRP-270 service manual Repair Guidelines, Fpc

Page 68

 

 

 

 

 

SRP-270

8-6-3 Repair Guidelines

 

 

 

 

 

 

 

 

 

 

Phenomenon

Condition

Cause

Level

Check point & Method

Repair Method

1. Motor

Motor does not

Defective

B

·Check the input

·Inspect and repair

does not

rotate despite

power input to

 

power

the power

rotate

printing

motor

 

·Check the input

supply circuit

 

command

 

 

voltage (24V±2V)

 

 

has been given

 

 

between the

 

 

 

 

 

motor terminals

 

 

 

 

 

of the connector

 

 

 

 

 

using a tester or

 

 

 

 

 

oscilloscope

 

 

 

Defective

B

·Check input signal

·Replace the

 

 

motor drive

 

·Check if the signal

drive signal

 

 

signal

 

is being input

generating

 

 

 

 

to the motor drive

circuit

 

 

 

 

terminal of the

 

 

 

 

 

connector using

 

 

 

 

 

an oscilloscope

 

 

 

Damaged

B

·Check the conductivity

·Replace the main

 

 

or Improper

 

between the

circuit board Assy

 

 

connection

 

pertinent terminals

if there is no

 

 

between

 

 

conductivity

 

 

motor terminals

 

 

·If improperly

 

 

of the

 

 

connected,

 

 

connector

 

 

reconnect

 

 

 

 

 

the pertinent

 

 

 

 

 

leads in the proper

 

 

 

 

 

manner

 

 

Defective

B

·Apply 24V to the

·Replace the

 

 

motor

 

leads of the

motor, if it

 

 

 

 

motor then check

does not rotate

 

 

 

 

the rotation

 

 

 

 

 

(red: + black: -)

 

 

 

Occurrence

A

·Check the deformation

·Replace Head

 

 

of paper jam

 

of Head pin guide or

pin guide or platen

 

 

 

 

platen paper guide

paper guide if they

 

 

 

 

 

are deformed or

 

 

 

 

 

destroyed

2. No dot

Motor rotates

Head FPC

B

·Check if the head FPC

·If not, securely

printing

normally but no

is disconnected

 

is properly inserted

reinsert the head

is performed

dot printing is

from it

 

into its connector

FPC

 

performed

connection

 

 

 

 

 

Broken

B

·Check the conductivity

·Replace the

 

 

common

 

between the common

head unit, if

 

 

lead in head

 

lead of head FPC and

there is no

 

 

FPC

 

other terminals

conductivity

 

 

 

 

(20Ω±10%)

 

 

 

Common

A

·Check the conductivity

·Replace the main

 

 

lead between

 

of the common

circuit board Assy

 

 

the head FPC

 

lead section

if there is no

 

 

and connector

 

·Check the voltage

conductivity or 28V

 

 

is broken

 

(28V±2V)

 

 

 

Defective

B

·Observe by

·Replace the timing

 

 

timing detector

 

oscilloscope

detector sub Assy,

 

 

sub Assy

 

to check if a timing

if no timing signal is

 

 

 

 

signal is being

being generated

 

 

 

 

generated

 

Rev. 3.02

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Image 68
Contents SRP-270 SRP-270 Alignment and Adjustments SRP-270 About this Manual Precaution symbols AboutOverview of this Receipt Printer CopyrightWaring Do not use an isolation transformer during this test Precaution SegmentSafety Precautions Servicing Precaution Precaution for Electrostatically Sensitive Devices ESDs Installation and Operation InstallationAC Adapter Installation Interface Cable InstallationPaper Roll Installation Operation Setting the DIP switchesSetting the DIP switch RS-232C Serial Interface Mode Setting the DIP switch IEEE1284 Parallel, USB InterfaceYES OFF Self Test Mode Hexadecimal DumpingSerial Self-Test Sheet Parallel Self-Test Sheet SRP-270 Product Specifications Printer Dimensions mmAC Adapter Dimensions mm AppearanceFeature Locations Feature LocationGeneral Specifications Printer Mecha SpecificationsPrinter Mecha Specification USBCharacter Specification AsciiPrinter SMP-710/SMP-710N Pin Description GNDPrinter Head Specification Printer Head Thermistor SpecificationFeed & Carriage Motor Specification Auto cutter specificationSmps Specifications Ribbon Cassette SpecificationOther Component Specification Smps Switching Mode Power Supply SpecificationInterface Specifications 1 RS-232C Serial Interface 1a Specification1e H/W Flow Control 1d Signal Description1c Cable Connection 2 RS-485 Serial Interface 2a Specification 1f S/W Flow Control2c Cable Connection Printer Host Side2d Signal Description 3a Forward Mode Specification Compatibility mode2f S/W Flow Control IEEE1284 Parallel Interface3c Signal Specification Compatibility/Nibble/Byte mode 3c IEEE1284 I/F Cable4a Specification 4b Signal Description4 USB2.0 Interface 4c USB I/F CableCash Drawer Specifications ※ Note +24V is always output through pin 4 during power onCash Drawer Cable Cable ConnectionWiring Diagram HardwareBlock Diagram Block DiagramPower Circuit Special Circuit DescriptionsDrawer Driving and Feed, Auto Cutter Motor Voltage +24Vdc Logic IC Driving Voltage +5VReset Circuit Reset Block DiagramCash Drawer Block Diagram Cash Drawer Circuits4 I/F PBA Detect Block Diagram PBA DIPC1 DIPC2 DIPC35 RS-232C Communication Block Diagram RS-232C Communication Block Diagram6 RS-485 Communication Block Diagram 10 RS-485 Communication Block DiagramParallel Communication Block Diagram USB Communication Block DiagramDIP Switch Circuit 12 DIP Switch Block DiagramPlate Bottom Disassembly and AssemblyGeneral Precautions on Disassembly Cover Assy SRP-270D Type Cover Assy SRP-270A & SRP-270C TypeCase Upper Assy SRP-270A & SRP-270C Type Case Upper Assy SRP-270D Type Printer Assy SRP-270A & SRP-270C TypePrinter Assy SRP-270D Type Auto Cutter AssyMain PCB Interface Board AssyAdjustment of Head gap Alignment and AdjustmentsPrinter Adjustment Troubleshooting Ieee 1284 Problem USB ProblemAppendix Spec of SMP-710/710N SpecificationsPrinting specifications Character specifications ANKPaper specifications Ribbon Cassette specifications Mcbf Main Unit specificationsReliability Electrical specifications Mechanisms specificationsPrinciple of Movement SRP-270 SRP-270 SRP-270 Operation of Color change Description of Timing chart.1 Circuit board block diagram Precautions on Printer Handling Handling the PrinterPaper Setting Procedures Insertion/Removal Remove method by manual Ribbon Cassette Installation Inspection MaintenanceCleaning Lubricants and Adhesive Application Tools, Lubricants and Adhesives RepairRepair Guidelines FPCRev SRP-270 SRP-270 Phenomenon Assignment Connector Pin Taiwan Tack coDisassembly AssemblyWBH WPHSub-assemblies Check Point②SWITCH Lever ③WIRE Assy①SHAFT Pulley ②LEVER Tension①BRACKET P/F R ②GEAR PF Idle③GEAR Knob ④GEAR Knob IdleMain-assemblies ①GEAR Tape UP ②GEAR TU Pulley③WASHER Belt Guide ⑤BRACKET PF L①SUB PCB Assy ②SCREW Tapping M2*3, 2EA③MANUAL Cutter ⑤PLATEN Paper Guide①FRAME Main C/K ASSY-4 ②SERIAL NO. TAG③TAPE Insulation ④LEVER Color Change⑧FPC Connector ①GEAR Reduction a②GEAR Reduction B ③RIBBON Feeder Assy①AD Lever ②SHAFT Head Guide ③SHAFT Head Carriage ⑤HEAD Print⑤RIBBON Frame ⑥SPRING Ribbon Frame ⑧HEAD Cover Assy①RIBBON Frame ②SPRING Ribbon Frame Adjustment