GP-965 SLIP PRINTER
USER’S MANUAL
JCM GOLD (H.K.) LTD.
Oct, 2000
GP-965 USER’S MANUAL 2
PREFACE
Thank you for purchasing this Slip Printer. Please read this manual carefully before operating your slip printer and keep
it at hand for future reference. We hope it will be helpful to you if you encounter any operational problem.
The information in this manual is subject to change without notification. Further pages may be added to future editions.
The user is asked to excuse any omissions or error in the present edition. No liability will be assumed for any changes,
omissions, or error, in this manual, or for any accidents that occur while the use is following the instructions in it.
No liability will be assumed for defects in the slip printer’s firmware.
BEFORE OPERATION THE SLIP PRINTER
General Precautions
l The shock of impact can damage the slip printer. Install the slip printer on a stable and level place.
l Do not move the slip printer with the power ON.
l Be careful not to spill liquids on the slip printer, or drop metallic objects such as paper clips into it.
l To clean the slip printer, wipe it with a soft, dry cloth, Do not use solvents such as thinner, lcohol or benzene.
l If you leave the slip printer unused for a long time, unplug the power cord.
l Please pay attention to the following notes for the operation of the slip printer.
Power on: Turn on the power of ECR first, then power on the slip printer.
Power off: Turn off the power of the slip printer first, then power off ECR.
Operation message: While operation the slip printer, if the slip printer has paper, but ECR display the message
that slip printer has no paper, please turn off the power of the slip printer, then turn on it again.
Choosing a Location for the Slip Printer
Avoid location where the slip printer would be exposed:
l Excessive dust
l Vibration
l High humidity
l Extremely high or low temperature rapid changes in temperature
l Direct sunlight
l Direct heat from a heating appliance.
NOTICE
FOR PLUGGED EQUIPMENT, THAT THE SOCKET – OUTLET SHALL BE INSTALLED NEAR THE EQUIPMENT AND SHOULD BE EASILY ACCESSIBLE.
CAUTION
Do not use this slip printer outdoors in the rain or near any source of liquid.
GP-965 USER’S MANUAL 3
Things to Check when Unpacking
The GP965 Slip Printer consists of following part and manual. When unpacking, check to see if your GP965 Slip Printer
contains all of these items.
Item Product name and type Quantity 1 GP965 Slip Printer 1 2 Power Code Black (H05VVF 0.75/3C, 1.8M) 1 3 ERC-27 Ribbon Cassette (Purple) 1 4 Dust Cover 1 5 Serial port Communication Cable 1 6 GP965 Slip Printer User’s Manual (this manual) 1 7 Parallel port Communication Cable (option) 1
If any of these items are missing or found faulty, please contact your distributor. Also, if there is any question or doubt
about the packaged product, contact your distributor.
GP-965 USER’S MANUAL 4
CHAPTER 1
GENERAL DESCRIPTION
1.1 General Features Compact, space efficient design
Functions and software control features include:
l It can be used as a general serial terminal printer
l Multiple character sizes (standard, double width)
l Forward and backward paper feeding
l Paper eject function
l TOF and BOF detection
1.2 General Specifications 1.2.1 Printer Mechanism
l Printing method: 7-pin, shuttle impact dot-matrix
l Printing width: 65.84mm, 210 dots
l Printing words: 35 characters/line
l Character set: 96 ASCII characters and multiple international characters
l Character size: 1.6mm(W)¡ Á2.9mm(H) at 5¡ Á7 font (3.2mm(W)¡ Á2.9mm(H) at 5¡ Á7 font, enlarged)
l Column spacing: 0.63mm(5¡ Á7 font) (1.26mm for 5¡ Á7 font, enlarged) is the default value
l Printing speed: Approx. 2.3 LPs (5¡ Á7 font, 3 dot line spacing)
l Line spacing: 4.23mm (1/6 inch)
l Paper feed speed: Approx. 25 lines/sec (105mm/s)
l Paper release: Release by operator panel switch
l Paper backward: Backward by operator panel switch
l LED display when power turn on
1.2.2 Paper
l Paper types: Normal paper (high quality), pressure sensitive paper, carbon copy paper
l Total thickness: 0.09mm to 0.35mm
l Dimensions: 80mm(W)¡ Á80mm(L) to 182mm(W)¡ Á257mm(L), Up to European B5 size
l Copy capability and paper thickness:
1) Single sheet (No copies) 0.09mm to 0.25mm
2) Combination of normal paper and pressure sensitive paper
3 sheets maximum (1 Original + 2 copies)
Back paper: 0.07mm to 0.20mm
Copy paper, original paper: 0.04mm to 0.07mm
Carbon copy paper: Approx. 0.035mm
1.2.3 Inking
l Inking method: Exclusive ribbon cassette
l Color: Purple
l Cassette dimensions: Approx. 115mm(W)¡ Á42.0mm(D)¡ Á22mm(H)
l Life expectancy: Approx. 1.5million characters
GP-965 USER’S MANUAL 5
l Type: EPSON ERC-27
1.2.4 Power Supply: AC 100V to 240V, 50Hz or 60Hz
1.2.5 Power Consumption:
l Operating: Approx. 150mA at AC 240V, or 500mA at AC 100V
l Non-operating: Approx. 15mA at AC 240V, or 40mA at AC 100V
1.2.6 Temperature:
l Operating: 0 to 40'C
l Storage: -10 to 50'C
1.2.7 Reliability:
l MCBF: 1.5 million lines
l Print head life: Approx. 100 million strokes/pin
1.3 Interface 1.3.1 Parallel interface (Option)
1.3.1.1 General Specification
l Specification
Data format: 8-bit parallel
Synchronization: STROBE pulse from the host computer
Handshaking Timing: ACKNLG and BUSY signals
Signal level: TTL compatible.
l Interface Connector: 36pin plug or equivalent
l Pin Assignment
Signal Pin Return Signal Direction 1 19 STROBE Host machine 2 20 DATA1 Host machine 3 21 DATA2 Host machine 4 22 DATA3 Host machine 5 23 DATA4 Host machine 6 24 DATA5 Host machine 7 25 DATA6 Host machine 8 26 DATA7 Host machine 9 27 DATA8 Host machine 10 28 ACKNLG Printer 11 29 BUSY Printer 12 30 PE Printer 13 SLCT Printer 14 NC 15 NC 16 GND 17 CHASSIS GND 18 NC 19-30 GND 31 NC 32 NC 33 GND 34 NC
GP-965 USER’S MANUAL 6
35 +5V Printer 36 NC
NOTES:
l "Return Side" denotes the Twisted-pair return, to be connected to signal ground. For interface wiring, be sure to use
a twisted-pair cable for each signal and complete the connection on the return side. To prevent noise, these cables
should be shielded and connected to the chassis of the host computer.
l All of the interface conditions are TTL. The rising time and falling time of any signal should be 0.2us or less.
l Never transmit data without checking ACKNLG and BUSY. (Data should only be transmitted to this printer after
confirming that ACKNLG is active, or when BUSY is "LOW".)
l The interface cable should be as short as possible.
1.3.1.2 Timing chart£ º BUSY
/ACK
5us 5us
DATA
/STB
0.5us(min)
0.5us(min)
GP-965 USER’S MANUAL 7
1.3.2 Serial interface
1.3.2.1 Specification
l Communication Speed: 9600bps, 4800bps, 2400bps, 1200bps, DIP Switch select (on the bottom of the printer case)
l Synchronizing method: Synchronous
l Handshaking: XON/XOFF
l Data format: 1 start-bit, 8-bit data, non check bit, 1 stop-bit
l Signal level: ON (SPACE) = 3V to 12V, OFF (MARK) = -3V to -12V
1.3.2.2 Connector: D-Sub connector 25pin (DB-25S)
PIN No. SIGNAL DESCRIPTION DIRECTION 1 FG Chassis GND 2 TD Transmitted Data Output 3 RD Receiving Data Input 4 CTS Clear Transmit Input 5 RTS Requisition Transmit and Paper Empty Output 7 S.G Signal GND
Notes:
l Output: from GP-965 slip printer to host
l Input: from host to GP-965 slip printer
1.3.2.3 Timing signal 35 characters More than 35 characters
LF
RXD FROM HOST DATA DATA DATA
DC3 DC1 NAK DC3 DC1 DC3
TXD TO HOST
Have paper
Printing Printing
No paper
RTS
GP-965 USER’S MANUAL 8
Notes:
l LF: 0AH
l DC1: 11H
l DC3: 13H
l NAK: 15H
1.4 DIP Switch function and set 1.4.1 DIP Switch (on the bottom of the printer case)
The DIP settings are read and become effective only when the power is turned on or when the printer is reset. Therefore,
changing the settings while the power is on will not have any effects.
1.4.2 DIP Switch function and setting
DIP Switch function and set£ ̈ on the bottom of the printer case£ © BAUD SET
BUTTON WORKING OR NOT WORKING SELECT
CHARACTER TABLE SELECT
PARALLEL OR SERIAL PORT SELECT
DIP1 DIP2 BAUD (BPS)
DIP3 BUTTON DIP4 CHARACTER TABLE
DIP7 DIP8 PORT
OFF OFF 9600 OFF WORKING OFF 1 OFF OFF PARALLEL OFF ON 4800 ON NOT
WORKING ON 2 ON ON SERIAL
ON OFF 2400 ON ON 1200
Notes£ º
l DIP5 and DIP6 not use.
l Character table 1 is JAPAN character, character table 2 is ITALY character.
1.5 The machine system is installed and operated 1.5.1 Back panel
POWER£ º100V to 240V power socket
SERIAL£ ºSerial port socket
PARALLEL: Parallel port socket (option)
POWER SERIAL PARALLEL
GP-965 USER’S MANUAL 9
1.5.2 Front panel SW and operate
l POWER LED£ R̈ED£ ©
Light: Power is turned on
Dark: Power is turned off
l Button function
Press RELEASE, release paper
Press REVERSE, eject paper to backward
Press RELEASE and REVERSE, then turn on power, itself check
After turn on power, press RELEASE and REVERSE, reset
POWER
RELEASE
REVERSE
GP-965 USER’S MANUAL 10
1.6 Control Codes and Functions 1.6.1 CR
Name: Carriage Return
Code: 0DH
Function: This code is same as LF.
1.6.2 LF
Name: Line Feed
Code: 0AH
Function: When this code is received, the data in the buffer is printed and the paper is advanced one line.
If there is no printable data preceding this code, or if all codes before this code are space codes, this code advances the
paper one line without printing anything.
Line spacing is 1/6 inch.
1.6.3 FP
Name: Form Feed
Code: 0BH+n (1<=n<=20)
Function: Rapid Paper Feeding is generated after printing for one line by inputting Parameter Data after this code (Rapid
Paper Feed Code). It will be read 20 in the memory when the data comes 20 or over 20. In case of zero “0” on data, it
will be read as “1”.
1.6.4 HP
Name: Head Position
Code: 13H+n (1<=n<=32)
Function: The Head Position including the Space code by inputting Parameter Code after this code can be generated. In
case of 32 and over 32 on Parameter or Print Buffer Data, it will be set on 32.
1.6.5 PR
Name: Paper Release Code
Code: 12H
Function: Paper Release Code. After printing for one line, the paper can be released by inputting this code. Over 29
digits one printing can not be allowed for one line.
1.6.6 CAN
Name: Cancel Code
Code: 18H
Function: Cancel Code. Clearing out all memory for one line from Print Buffer by inputting this code.
1.6.7 LC
Name: Set enlarged printing
Code: 11H+n (32<=n<=255)
Function: Large Character Code. The character of data code following this code can be enlarged. Data code from 00H to
1FH will be regarded as the space. This code is released at every character.
GP-965 USER’S MANUAL 11
1.6.8 SP
Name: Space Code
Code: 20H
Function: Space Code. By inputting this code, the space for one character can be made.
1.6.9 NUL
Name: Null code
Code: 00H or FFH
Function: These codes are useless codes.
GP-965 USER’S MANUAL 12
CHAPTER 2
OPERATING PRINCIPLES
2.1 General Description
This section provides an overview of the hardware and firmware.
2.1.1 Hardware Overview
2.1.1.1 Connection of Components
Fig. 2-1 shows the cable connection between the main hardware components, and Table 2-1 provides more details on the
connectors.
DC MOTOR
STEP MOTOR
HEAD
RELEASE MAGNET
BOF, TOF SENSORS
TIMING SENSOR
RESET SENSOR
Fig. 2-1 Cable Connection of Main Hardware Components
Panel SW board
30 PIN
MAIN BOARD
PRINTER
MECHANISM
M-290
CN3 C
N
1
GP-965 USER’S MANUAL 13
Table 2-1 Cable Summary of GP-965
Connector No. Board Name Description Pin Qty. CN1 Main Circuit Board To printer mechanism 30 CN2 Main Circuit Board To Parallel interface (option) 36 CN3 Main Circuit Board To Panel SW circuit Board 5 CN4 Main Circuit Board To DC voltage input 4 CN5 Main Circuit Board To Serial (RS-232) interface 25
2.1.1.2 Feature of the Printer Mechanism
Regarding the printer mechanism of GP-965, refer to the separate “M-290 Technical Manual.”
2.1.1.3 Block Diagram of the Printer
+5V
+24V
+5V
To RS-232
Communication
To Parallel
Communication
+24V
AC Input Fig. 2-2 Block Diagram of the GP-965 Printer
The Main Circuit Board consists of:
Panel SW
CPU
ROM
RAM
Driver
Receiver
Printer
mechanism
M-290
Power
Supply
Driver
Receiver
Data bus
Address
bus
Control
line
Control
line
Control
Cable
Communication
Line
GP-965 USER’S MANUAL 14
l CPU KS88P0716N
l RAM TC551001CF
l EPROM or EEPROM 27C020 (Program and Character generator)
l Motor Driver circuit
l Head Driver circuit
l Operator Control circuit
l Printer Interface circuit
l Power Supply circuit
CPU KS88P0716N performs all control operations of this printer and operates according to the programs stored in
EPROM. The RAM is mainly used as a BUFFER.
2.2 Firmware Overview 2.2.1 CPU Port Allocation
The following tables show the allocation for Ports 0 through 6 of CPU (I: input, O: output).
Table 2-2 Port 0 Allocation
Port No. Pin No. I/O Function 0 7 Address Bus Address line A8 of the external peripheral interface 1 6 Address Bus Address line A9 of the external peripheral interface 2 5 Address Bus Address line A10 of the external peripheral interface 3 4 Address Bus Address line A11of the external peripheral interface 4 3 Address Bus Address line A12 of the external peripheral interface 5 2 Address Bus Address line A13 of the external peripheral interface 6 1 Address Bus Address line A14 of the external peripheral interface 7 64 Address Bus Address line A15 of the external peripheral interface
Table 2-3 Port 1 Allocation Port No. Pin No. I/O Function 0 63 Data and Address Bus Address/Data line A0/D0 1 62 Data and Address Bus Address/Data line A1/D1 2 61 Data and Address Bus Address/Data line A2/D2 3 60 Data and Address Bus Address/Data line A3/D3 4 59 Data and Address Bus Address/Data line A4/D4 5 58 Data and Address Bus Address/Data line A5/D5 6 57 Data and Address Bus Address/Data line A6/D6 7 56 Data and Address Bus Address/Data line A7/D7
GP-965 USER’S MANUAL 15
Table 2-4 Port 2 Allocation Port No. Pin No. I/O Function 0 47 /ALE External interface bus control signal /ALE 1 46 /DS External interface bus control signal /DS 2 45 R/W External interface bus control signal R/W 3 44 /DM External interface bus control signal /DM 4 43 I Timing signal 5 42 Not used 6 41 I Printer’s Reset signal 7 40 I /STB signal (Parallel port)
Table 2-5 Port 3 Allocation Port No. Pin No. I/O Function 0 31 O DC Motor Drive signal, H: ON, L: OFF 1 30 O Stepping Motor Common Drive signal, H: ON, L: OFF 2 29 O RELEASE Magnet Drive signal, H: ON, L: OFF 3 28 O /ACK signal (Parallel port) 4 27 O BUSY signal 5 26 O No Paper signal 6 25 O TXD signal (RS-232) 7 24 I RXD signal (RS-232)
Table 2-6 Port 4 Allocation Port No. Pin No. I/O Function 0 15 I Receive Data line D0 in Parallel port 1 14 I Receive Data line D1 in Parallel port 2 13 I Receive Data line D2 in Parallel port 3 12 I Receive Data line D3 in Parallel port 4 11 I Receive Data line D4 in Parallel port 5 10 I Receive Data line D5 in Parallel port 6 9 I Receive Data line D6 in Parallel port 7 8 I Receive Data line D7 in Parallel port
Table 2-7 Port 5 Allocation Port No. Pin No. I/O Function 0 50 O Stepping Motor signal 1 51 O Stepping Motor signal 2 52 O Stepping Motor signal 3 53 O Stepping Motor signal 4 54 Not used 5 55 Not used 6 21 I TOF Detect signal, H: Paper Loaded, L: No Paper 7 22 I BOF Detect signal, H: Paper Loaded, L: No Paper
GP-965 USER’S MANUAL 16
Table 2-8 Port 6 Allocation Port No. Pin No. I/O Function 0 32 O Head Drive Trigger signal 1 33 O Head Drive Trigger signal 2 34 O Head Drive Trigger signal 3 35 O Head Drive Trigger signal 4 36 O Head Drive Trigger signal 5 37 O Head Drive Trigger signal 6 38 O Head Drive Trigger signal 7 39 O Head Drive Trigger Control signal
GP-965 USER’S MANUAL 17
CHAPTER 3
Troubleshooting
3.1 OVERVIEW
Because of the variety of symptoms that may occur according to the site of the problem, troubleshooting can be quite
difficult. To simplify entry into the actual repair procedures, however, this chapter groups them into the two categories
below:
(1) Repair by unit replacement
(2) Repair of the units
First, follow the procedures for repair by unit replacement to isolate the defective element within that unit. For all
information on the troubleshooting procedures for the printer mechanism, refer to the separate “GP-965 Technical
Manual.”
3.2 GENERAL PRECAUTIONS
Please pay attention to the following notes for the operation of GP-965 slip printer.
Power on:
Turn on the power of ECR first, then power on the slip printer.
Power off:
Turn off the power of the slip printer first, then power off ECR.
Operation message:
While operating the GP-965 slip printer, if GP-965 slip printer has paper, but ECR display the message that GP-965 slip
printer has no paper, please turn off the power of GP-965 slip printer, then turn on it again.
3.3 REPAIR BY UNIT REPLACEMENT
This section is organized on the basis of the surface phenomena that accompany the occurrence of a problem, allowing
you to distinguish between troubles on a unit basis. Table 3-1 lists the main units of this printer, and Table 3-2 lists the
instruments you will require. Table 3-3 lists each surface phenomena and the page of this chapter the corresponding
flowchart can be found.
GP-965 USER’S MANUAL 18
Table 3-1 Main Units of GP-965
Name Unit No. Main Circuit Board Refer to the GP-965 Panel SW Circuit Board M-290 Printer Mechanism
Part Pricing List
Table 3-2 Required Measuring Instruments
Designation Standard Tester DC voltage and resistance Oscilloscope Equipped with 50-MHz storage
Table 3-3 Surface Phenomena for Troubleshooting
Surface Phenomena Description The POWER switch is turned ON, but the printer doesn’t operate.
l The POWER LED on the control panel doesn’t light.
l The POWER LED lights, but the printer isn’t initialized.
The printer prints, but printed results are poor.
l No printing is performed. l Printing is faint. l Dots are missing.
Paper feeding is abnormal. l The paper is not fed at all. l Paper feeding is irregular and
printing is uneven. The control panel doesn’t work properly.
l The REVERSE or RELEASE switch doesn’t work.
GP-965 USER’S MANUAL 19
3.3.1 The POWER switch is turned ON, but the printer doesn’t operate
l CHECK POWER SUPPLY
Y
N
N
Y
N
Y
N
Y
N
Y
START
Is the +24VDC output
voltage normal?
END
Is the AC input
voltage normal?
Check the contact of connector
and AC switch
Is the FUSE normal?
END
Replace the power supply board
Trouble remedied?
END
Replace the FUSE
Trouble remedied?
GP-965 USER’S MANUAL 20
l CHECK MAIN CIRCUIT BOARD
Y
N
Y
N
Y
N
Y
N
N Y
START
Input +24VDC to CN4. Then
POWER LED lights?
Is the +5V voltage normal?
Check the contact of all connectors
Trouble remedied?
Replace the main circuit board
Trouble remedied?
Replace the printer mechanism
Trouble remedied?
END
GP-965 USER’S MANUAL 21
3.3.2 The printer operates but printing is abnormal
Y
N
N
Y Y
N
Y
N
Y
N
START
Start the itself-test
Is the printing faint or
missing dots?
Any printing is
performed?
Check the contact of connector CN1
Trouble remedied?
Replace the main circuit board
Trouble remedied?
Replace the printer mechanism
END
Wipe the print head with alcohol
Trouble remedied?
END
GP-965 USER’S MANUAL 22
3.3.3 Paper feeding is abnormal
N
Y
N
Y
Y
N
N
Y
START
Are CN1 and the M-290
connector in proper contact?
Replace the main circuit board
Trouble remedied?
Replace the printer mechanism
Trouble remedied?
END
END
Correct the contact
Trouble remedied?
GP-965 USER’S MANUAL 23
3.3.4 The control panel doesn’t work properly
N
Y
N
Y
Y
N
START
Connector CN3
contact is normal?
Replace the panel SW circuit board
Trouble remedied?
Replace the main board
END
Correct the contact
Trouble remedied?
END
GP-965 USER’S MANUAL 24
3.4 REPAIR ON THE UNIT LEVEL
3.4.1 Main Circuit Board Unit
PHENO-MENON
DETAIL CAUSE CHECK REPAIR- METHOD
Abnormal +5V power supply
Faulty zener diode ZD5,diodes D24,D25, and regulator U13 (LM2575T-5.0)
Check the +5V supply voltage in pin4 of U13
Replace ZD5, D24, D25 and/or U13
Abnormal oscillator circuit in CPU
Faulty oscillator X1 Check if the oscillator is oscillating properly
Replace X1
Abnormal section of program EPROM
Faulty U1(CPU) and U8
Check the pin37 output of the CPU and pin2 output of the U8
Replace the U1 and/or U8
Abnormal RAM selection
Faulty U9, U10 and/or the U1 (CPU)
Check the pin57 output of the CPU, pin3 and pin6 of U9, and pin3 of U10
Replace U9, U10 and/or the CPU
Abnormal drive of DC motor
Faulty TR9, U6 and CPU
Check the pin24 output of the CPU and pin9 output of U6. Check if TR9 is normal.
Replace the CPU, U6 and/or TR9
Abnormal BOF sensor operation
Faulty U1(CPU) Check the pin15 output of the CPU
Replace the CPU
Abnormal TOF sensor operation
Faulty U1(CPU) Check the pin14 output of the CPU
Replace the CPU
Abnormal EPROM Abnormal U5 Replace U5 Abnormal RAM Abnormal U4 Replace U4
The printer doesn’t operate at all
Abnormal CPU Faulty U1 (CPU) Check pin40 (/AS signal) of the CPU
Replace the CPU
Faulty carriage operation
The carriage doesn’t work at all
Abnormal +24V supply voltage
Check +24V voltage in pin1, 2, 3, 4 of CN1
Check power supply
No printing is performed
Faulty charge pulse circuit
Check the collector TR9 output, pin24 output of U1 and pin9 output of U6
Replace U6, U1 and/or TR9
Abnormal printing (by the self test)
Certain dots are never printed
Faulty transistor TR10, U9 and/or U11
Check the output of TR10, pin8 output of U9, pin14 output of U11
Replace the TR10, U9 and/or U11
Abnormal release operation
No paper release is performed
Faulty CPU, TR13 and/or D12
Check pin22 output of CPU and TR13. Check if D12 is normal
Replace the CPU, TR13 and/or D12
Paper feeding is abnormal
No paper feeding is performed
Faulty CPU, TR11, TR12, U7, D10 and D11
Check pin23, 43, 44, 45, 46 output of the CPU, and TR11 and TR12. Check if the D10 and D11 is normal
Replace the CPU, TR6, TR7, D25 and/or U13
The panel switches don’t operate properly
Faulty U12 Check pin7 and pin9 of U12
Replace U16
GP-965 USER’S MANUAL 25
Abnormal driver/receiver in serial port
Faulty U14 Check the signals at pin7~14 of U14
Replace U14 The wrong characters are printed
Abnormal driver/receiver in parallel port
Faulty U8 Check the signals at pin5~13 of U8
Replace U8
3.4.2 Panel SW Circuit Board Unit
PHENOMENON DETAIL CAUSE CHECK REPAIR METHOD
Faulty switches Check the switch Replace the switches The panel switches don’t operate properly
Broken cable Check the cable Replace the cable Faulty switches Check the switch Replace the switches Abnormal release
operation No paper release is performed Broken cable Check the cable Replace the cable
Faulty switches Check the switch Replace the switches Paper reverse is abnormal
No paper reverse isn’t performed Broken cable Check the cable Replace the cable
Power LED doesn’t light
Printing is normal
Faulty LED Check the LED Replace the LED
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