Epson Stylus Color 400 Service Manual Page 22
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EPSON Stylus Color 400 Service Manual
Rev. A
1-1
5
1.3 Interface
This printer provides parallel interface as standard.
1.3.1 Parallel Interface (Forward Channel)
[Transmission mode]
: 8 bit parallel, IEEE-1284 compatibility mode
[Synchronization]
: By /STOPBE pulse
[Handshaking]
: BY BUSY and /ACKLG signal
[Signal level]
: TTL compatible level
[Adaptable connector]
: 57-30360(amphenol) or equivalent
BUSY signal is set high before setting either/ERROR low or PE high and held high until all these
signals return to their inactive state.
BUSY signal is at high level in the following cases.
During data entry (see Data transmission timing)
When input data buffer is full
During -INIT signal is at low level or during hardware initialization
During printer error (See /ERROR signal)
/ERROR signal is at low level when the printer is in one of the following states.
Printer hardware error (fatal error)
Paper-out error
Paper-jam error
Ink-out error
PE signal is at high level during paper-out error.
Table 1-9 shows the signal and connector pin assignments for parallel interface(forward channel*1).
In case of these signals, twist pair line is used and returning side is connected to signal GND.
(*1): Forward channel is the mode when the ordinary data such as an order to print is sent
from the PC to the printer.
Pin No. Signal Name Return GND pin In/Out Functional Description
1 /STROBE 19 In The strobe pulse. Read-in of data is performed
at the falling edge of this pulse.
2-9 DATA0-7 20-27 In The DATA0 through DATA7 signals represent
data bits 0 to 7, respectively. Each signal is at
high level when data is logical 1 and low level
when data is logical 0.
10 /ACKNLG 28 Out This signal is a negative pulse indicating that
the printer can again accept data.
11 BUSY 29 Out A high signal indicates that the printer cannot
receive data.
12 PE 28 Out A high signal indicates paper-out error.
13 SLCT 28 Out Always at high level when the printer is
powered on.
14 /AFXT 30 In Not used.
31 /INIT 30 In The falling edge of a negative pulse or a low
signal on this line causes the printer to
initialize. Minimum 50 us pulse is necessary.
32 /ERROR 29 Out A low signal indicates printer error condition.
36 /SLIN 30 In Not used.
18 Logic H - Out Pulled up to +5V via 3.9K ohm resistor.
35 +5V - Out Pulled up to +5V via 3.3K ohm resistor.
17 Chassis GND - - Chassis GND.
16,33,19-30 GND - - Signal GND.
15,34 NC - - Not connected.
Note)
In/Out refers to the direction of signal flow from the printer’s point of view.
Table 1-9. Signal and Connector Pin Assignment for Parallel Interface
- SERVICE MANUAL 1
- Copyright 2
- Nagano, Japan 2
- PRECAUTIONS 3
- REVISION SHEET 5
- TABLE OF CONTENTS 6
- Chapter 1 7
- Product Descriptions 7
- 1.1 Features 8
- 1.2 Specifications 9
- 1.2.2 Paper Specification 11
- 1.2.4 Printing Area 13
- Printable area 14
- 1.2.5 Environmental Condition 15
- Chapter1 Product Description 17
- Note 3) 17
- 1.2.7 Physical Specification 18
- 1.2.8 Input Data Buffer 18
- 1.2.9 Electric Specification 19
- 1.2.10 Reliability 19
- 1.2.11 Safety Approvals 19
- 1.2.12 Acoustic Noise 20
- 1.2.13 CE Marking 20
- 1.3 Interface 22
- Tready Tbusy 24
- Tack Tnbusy 24
- Virtual Busy Status 25
- 1.4 Control Panel 26
- 1.4.2 Panel Functions 27
- 1.5 Error Status 30
- 1.5.4 No Ink-Cartridge 31
- 1.5.5 Maintenance Request 31
- 1.5.6 Fatal Errors 31
- 1.6 Printer Initialization 32
- 1.7 Initialization Settings 32
- 1.8 Main Components 33
- 1.8.4 C206PNL(Panel) Board 34
- Chapter 2 35
- Operating Principles 35
- 2.1 OVERVIEW 36
- 2.1.1.1 Printing Mechanism 37
- Nozzle Plate 38
- Ink Course 38
- 2.1.1.1.2 Printing Method 39
- Nozzle No.#9 40
- Nozzle No.#4 40
- Full-Overlap Micro-Weave: 41
- 2.1.1.2 Carriage Mechanism 42
- Parallelism 44
- Adjust Lever 44
- Eject Notched Roller 48
- Eject Roller 48
- PF Roller 48
- Support Roller 48
- 2.1.1.4 Ink System 49
- 2.1.1.4.1 Pump Mechanism 50
- CW Rotation 51
- CCW Rotation 51
- Tube pressured 51
- Tube released 51
- 2.1.1.4.2 Cap Mechanism 52
- +42 V DC 53
- Filter Circuit 55
- Prevention of 55
- Rectifier circuit 55
- Full Wave 55
- 2.2.2 C206 MAIN Board 56
- 2.2.2.1 Reset Circuits 58
- 2.2.2.2 Sensor Circuits 59
- 2.2.2.4 Timer Circuit 61
- 2.2.2.5 DRAM Control 61
- Gate Array 63
- E05B43(IC2) 63
- E05B44(IC2) 66
- LB1845(IC15) 66
- Chapter 3 67
- Disassembly and Assembly 67
- 3.1 OVERVIEW 68
- 3.1.2 Tools 69
- 3.2 Disassembly Procedures 71
- 3.2.1 Removing the Housing 72
- WORK POINT 73
- Fastener Head 77
- Print Head Unit 77
- Head Cleaner 80
- Order of assembling 80
- PF Roller Assembly 91
- HP Detector 93
- Chapter 4 94
- Adjustment 94
- 4.1 Overview 95
- 4.2 Adjustment 96
- Print Head Side 97
- Cleaner Head 97
- Overlap amount 97
- = More than 0.5mm 97
- Print Head 102
- 4.2.2.5 Bi-D Adjustment 103
- Chapter 5 105
- Troubleshooting 105
- 5.1 Troubleshooting 106
- Rev.A5-2 107
- Rev.A5-4 109
- 5.2.2 Error is detected 110
- Rev.A5-6 111
- Rev.A5-8 113
- Rev.A5-10 115
- Rev.A5-12 117
- Rev.A5-14 119
- Chapter 6 121
- Maintenance 121
- 6.1 OVERVIEW 122
- 6.1.3 Lubrication 123
- Chapter 6 Maintenance 124
- (Oil pad) 125
- Carriage Assembly 125
- (bottom view) 125
- "SHAFT, CR, GUIDE" 125
- "GEAR, 23.2" 127
- "GEAR, 16, 40.8" 127
- "GEAR, 67.2" 127
- "COMBINATION GEAR 127
- 8, 14.4" 127
- "HOPPER, ASSEMBLY" 128
- "FRAME, ASF" 128
- Appendix 129
- A.1 Connector Summary 130
- A.2 Connector Summary 131
- A.3 EEPROM Address Map 133
- A.5 Exploded Diagrams 141
- As of September, 1996 144
- SEIKO EPSON CORPORATION 145
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