EPSONIMPACTDOT PRINTER
DLQ-3000
(upgrade model)
SERVICE MANUAL
EPSON
4006094
PREFACE
This document provides supplementary information to describe the new DLQ-3000 (Minerva+), which is a
follow-on version of the DLQ-3000 (Minerva). Therefore, you must refer to this information in conjunction with
DLQ-3000 (Minerva) Service Manual for details on any subjects common to both printers.
-i-
REVISION SHEET
Revision Issue Date Revision Page
A March 15, 1996 - 1st issue
-ii-
DLQ-3000 (MINERVA+) Product Description
1.1 FEATURES
Minerva+ is a 24-pin serial dot-matrix and flat-bed type impact printer. As this printer follows on DLQ-3000
(MINERVA+), the main future is almost same as DLQ-3000 (MINERVA).
The main features are ;
❏ Two built-in and one optional I/F
Bi-Directional Parallel Interface (IEEE-1284 nibble mode)
Serial Interface
Type-B Interface (Option)
The exterior view of DLQ-3000 (MINERVA+) is the same as DLQ-3000 (MINERVA).
Rev.A 1-1
Product Description DLQ-3000 (MINERVA+)
1.2 INTERFACE OVERVIEW
The printer provides an 8-bit Bi-directional parallel interface and serial interface as standard. Moreover, it is
possible to interface to various computers using the optional type-B interface board. This section describes
the specifications of the standard interfaces.
1.2.1 Parallel Interface Specifications
1.2.1.1 Forward Channel
Transmission mode: 8-bit parallel, IEEE-1284 compatible mode
Synchronization: By
Handshaking: By BUSY and
STROBE pulse
ACKNLG signal
Signal level: TTL-compatible level, IEEE-1284 level 1 device
Adaptable connector: 57-30360 (Amphenol) or equivalent
Data transmission timing: See Figure 1-1.
Note: Transition time (rise time and fall time) of every input signal must be less than 200 ns and
every output signal must be less than 120 ns.
The BUSY signal is at a HIGH level before either -ERROR signal is at a LOW level or the PE signal is at a
HIGH level until all these signals return to their inactive state. The BUSY signal is at a HIGH level in the
following cases:
- During data reception (see the figure above)
- When the input buffer is full
- When the
INIT input signal is active
- During initialization
- When the ERROR signal is active
- In the self-test mode
- In the SelecType
- When the parallel interface is not selected.
The
ERROR signal is at a LOW level when the printer is in one of the following conditions:
- Printer hardware error (fatal error)
- A paper-out error
- Release lever operation error
PE signal is at a HIGH level during paper out error.
DATA
-STORBE
BUSY
-ACKNLG
500 ns (min.) 500 ns (min.)
0 (min.) 500 ns (max.)
DATA (n)
500 ns (min.)
Figure 1-1. Data Transmission Timing
DATA (n+1)
0 (min.)
0 (min.)
500 ns ~10 µs
1-2 Rev.A
DLQ-3000 (MINERVA+) Product Description
Table 1-1 shows the connector pin assignments and signal functions for the 8-bit parallel interface.
Table 1-1. Signal and Connector Pin Assignments for Parallel Interface
(Forward Channel)
Pin No. Signal Name
1
2-9 DATA1-8 20-27 In
10
11 BUSY 29 Out
12 PE 30 Out
13 SLCT - Out
14
STROBE 19 In
ACKNLG 28 Out
AFXT - In
Return
GND Pin
I/O Description
Strobe pulse. Input data is latched at the falling
edge of this signal.
Parallel input data to the printer.
Active-HIGH input.
LSB: DATA1
MSB: DATA8
Indicates that data has been received and the
printer is ready to accept more data.
A HIGH level means the printer cannot accept
further data.
A HIGH level means a paper-out error. Always
the logical opposite of the ERROR signal.
Always at a HIGH level (pulled up to +5 V
through a 1K-ohm resistor).
Auto feed execution means that a line feed is
automatically performed upon input of a CR
code. Checked when the printer is initialized.
Active-LOW signal.
31
32
36
18,35 Logic H - Out
17 Chassis GND - - Chassis GND
16,19-30,
33
15,34 NC - - Not used. Not connected.
INIT 16 In
ERROR - Out A LOW level means that an error has occurred.
SLIN 30 In Not used.
GND - - Signal GND
Initialize printer. Minimum 50 µs pulse is
necessary. Active-LOW signal.
Pulled up to +5V and shorted to +5V via Schottky
diode, making these signals appear low to the
host when the printer is turned off.
Note: In/Out refers to the direction of signal flow as viewed from the printer.
Rev.A 1-3
Product Description DLQ-3000 (MINERVA+)
1.2.1.2 Reverse Channel
Transmission mode: 8-bit parallel, IEEE-1284 nibble mode
Synchronization: Refer to the IEEE-1284 specification
Handshaking: Refer to the IEEE-1284 specification
Signal level: IEEE-1284 level 1 device
Data transmission timing: Refer to the IEEE-1284 specification
Extensibility request: the printer responds to the extensibility request in the affirmative, when the
request is 00H or 04H, which mean;
00H: Request nibble mode of reverse channel transfer
04H: Request device ID in nibble mode of reverse channel
Transfer Device ID:
Table 1-2. Transfer ID
ESC/P2 IBM 2391 Plus
[00H][33H]
MFG:EPSON;
CMD:ESCPL2-00;
MDL:DLQ-3000;
CLS:PRINTER;
[00H][34H]
MFG:EPSON;
CMD:PRPXL24-01;
MDL:DLQ-3000;
CLS:PRINTER;
1-4 Rev.A
DLQ-3000 (MINERVA+) Product Description
Table 1-3 shows the connector pin assignments and signal functions for the 8-bit parallel interface.
Table 1-3. Signal and Connector Pin Assignments for Parallel Interface
(Reverse Channel)
Pin No. Signal Name
1 Host Clk
2-9 DATA 1-8 20-27 In
10 Ptr Clk 28 Out Printer clock signal
11
12
13
14 Host Busy 30 In Host busy signal
31
32
PtrBusy /
Data Bit -3,7
Ack Data Req /
Data Bit -2,6
Xflag /
Data Bit -1,5
INIT 30 In Not used.
Data Avail /
Data Bit -0,4
Return
GND Pin
19 In Host clock signal.
29 Out
28 Out
28 Out
29 Out
I/O Description
Parallel input data to the printer.
Active-HIGH input.
LSB: DATA1
MSB: DATA8
Printer BUSY signal and reverse channel
transfer data bit 3 or 7.
Acknowledge data request signal and reverse
channel transfer data bit 2 or 6.
Xflag signal and reverse channel transfer data
bit 1 or 5.
Data available signal and reverse channel
transfer data bit 0 or 4.
36 1284-Active 30 In 1284 active signal
18 Logic H - Out
35 +5V - Out
17 Chassis - - Chassis GND
16,19-30
,33
15,34 NC - - Not used. Not connected.
GND - - Signal GND
A high signal indicates that all other signals
source by the peripheral are in a valid state.
This line is pulled up to +5V through 3.3K Ω
resister.
Note: In/Out refers to the direction of signal flow as viewed from the printer.
Rev.A 1-5
Product Description DLQ-3000 (MINERVA+)
1.5 MAIN COMPONENTS
The main components of the DLQ-3000 are designed for easy removal and repair. The main components are
:
■ BOARD ASSY., C124 MAIN-B : control board
■ BOARD ASSY., C124 PSB/PSE : power supply board(100 ~ 120V/220 ~ 240V)
■ C124 SUB board
■ M-5L60 Printer Mechanism
■ Control Panel
■ Housing
1.5.1 BOARD ASSY., C124 MAIN-B
The main board consists of a µPD70433, an E05A88, Program (256 KB Flash memory), CG (8M for Japan /
4 M for other countries), D-RAMs (256 MB), Bi-Directional Interface circuit, etc.
1.5.2 BOARD ASSY., C124 PSB/PSE
This Power supply board consists of two transformers, two switching FETs, a switching regulator IC, diode
bridge, etc. This board has ratings for input AC voltages.
1.5.3 Printer Mechanism
This printer mechanism consists of a 24-pin impact dot head, PF motor , CR motor, color ribbon shift motor,
HP/PG sensor, paper width/paper end sensor, etc.
1.4.5 Housing Assembly
This printer Housing consists of the COVER ASSY.,PRINTER, the HOUSING ASSY.,UPPER, the
HOUSING ASSY.,LOWER and FRAME ASSY.,BOTTOM.
1-6 Rev.A
DLQ-3000 (MINERVA+) Service Manual Appendix
A.1 CONNECTOR SUMMARY
This section describes the component connection and detailed pin assignments of each connector of the units.
Figure A-1 shows the component connections of the DLQ-3000, and Table A-1 lists the connector
assignments and reference tables.
C124PSB/PSE
AC
Fan motor
PAR ALL EL I/F
SERIAL I/F
TYPE-B I/F
Panel
Cover Open Sensor
temp .
CN10 -1 2
CN 15,16
CN9
CN7
CN8
CN6
CN13
CN14
CN1
CN2
CN3
CN4
CN5
Printer MechanismC124 MAIN-B
Printhead
CS Motor
Film Ribbon Se nsor
Color Ribbo n Sensor
PEWSensor Assembly
CR Motor Asse mbly
PF Motor Assemb ly
LOAD Sensor Assembly
External Fan
PF Sensor
HP Sensor
Figure A-1. Cable Connection
Rev.A A-1
Appendix DLQ-3000 (MINERVA+) Service Manual
Table A-2 through appendix lists connector pin assignments.
Table A-1. Connector Assignment
Board
BOARD
ASSY.,C124
MAIN-B
Connector
CN 1 20 Printhead drive signal output
CN 2 20 Printhead drive signal output
CN 3 14 CS motor, Color ribbon / film ribbon / CS home sensor
CN 4 11 CR motor, PF motor output
CN 5 13 PG/ REL/COVER OPEN/LOAD sensor, External fan motor
CN 6 36 Type -B I/F
CN 7 36 Bi-Directional parallel I/F
CN 8 25 Serial I/F
CN 9 2 Power supply board fan motor
CN 10 4 Power supply input (+5V)
CN 11 6 Power supply input (+35V)
CN 12 6 Power supply input (+35V)
CN 13 10 Control panel
CN 14 2 CR motor common (cover open sensor)
CN 15 2 Power supply board temp.
Pin Description
C124 SUB
BOARD
BOARD
ASSY., C124
PSB / PSE
CN 16 2 Power supply board temp.
CN 4 From CN1 to Printhead output signal
CN 5 From CN2 to Printhead output signal
CN 6
CN 1 2 AC input line
CN 2 10 DC output ( +5V, +35V )
CN 3 6 DC output ( +35V )
From CN3 to CS motor, Color ribbon / film ribbon / CS
home sensor
A-2 Rev.A
DLQ-3000 (MINERVA+) Service Manual Appendix
Table A-2. Connector Pin Assignment - CN7
Pin I/O Name Description (Forward / Reverse)
1I
2 - 9 I DATA 0-7 Parallel data bit 0 to 7
10 O
11 O
12 O
13 O
14 I
15 - NC Not used and not connected.
16 - GND Signal Ground
STOBE / Host
Clk
ACKNLG /
PtrClk
BUSY /
PtrBusy, Data
Bit-3,7
PE /
AckDataReq,
Data Bit-2,6
SLCT / Xflag,
Data Bit-1,5
AFXT / Host
Busy
Data strobe / Host clock signal
Acknowledge / Printer clock signal
Printer busy and reverse channel transfer data bit 3 or 7
Paper out / Acknowledge data request and reverse channel
transfer data bit 2 or 6
Always HIGH at printer power on / Xflag and reverse
channel transfer data bit 1 or 5
Not used / Host busy signal
17 - Chassis GND Chassis ground
18 O Logic-H
19-30 - GND Signal Ground
31 I
32 O
33 - GND Signal Ground
34 - NC Not used and not connected.
35 O +5V Pulled up 5V
36 I
INIT / INIT Initialize signal / Not used
ERROR / data
avail, data
bit-0,4
SLIN /
1284-Active
Pulled up 5V / A HIGH signal indicates that all other signals
soursed by the peripheral are in valid state.
Error signal / Data available and reverse channel data bit 0,4
Not used. / 1284-active signal
Note: The signal direction I/O are viewed from the connector on the board.
Rev.A A-3
DLQ-3000 (MINERVA+) Service Manual Appendix
CN1
Head Conn 1
from mainboard
CN2
Head Conn 2
from mainboard
COM14 20
COM10/18 13
COM6/22 2
COM2 14
COM23 10
COM3/19 4
COM7/15 6
COM11 3
HD2 17
HD3 9
HD6 15
HD7 19
HD10 16
HD11 11
HD14 12
HD15 1
HD18 18
HD19 8
HD22 7
HD23 5
COM12/16 10
COM8/20 15
COM4/24 11
COM1/21 1
COM5/17 7
COM9/13 2
HD1 13
HD4 17
HD5 3
HD8 18
HD9 5
HD12 12
HD13 4
HD16 16
HD17 5
HD20 9
HD21 8
HD24 14
TENP 19
TEMP 20
20 COM14
13 COM10/18
2 COM6/22
14 COM2
10 COM23
4 COM3/19
6 COM7/15
3 COM11
17 HD2
9 HD3
15 HD6
19 HD7
16 HD10
11 HD11
12 HD14
1 HD15
18 HD18
8 HD19
7 HD22
5 HD23
10 COM12/16
15 COM8/20
11 COM4/24
1 C O M1/2 1
7 C O M5/1 7
2 C O M9/1 3
13 HD1
17 HD4
3 HD5
18 HD8
5 HD9
12 HD12
4 HD1 3
6 HD1 6
5 HD1 7
9 HD2 0
8 HD2 1
14 HD24
19 TEMP
20 TEMP
CN 4
Head conn 1
to Hea d
CN 5
Head conn 2
to H ea d
CN1
Head Conn 1
from mainboard
+5V 1
PEWR/L 5
PWLCOM 6
PWRCOM 2
RFCOM 7
RFA 11
RF_A 9
RFB 10
RF_B 8
CSHOME 3
GND 4
COLOR 13
FILM 14
GND 12
1 +5v
5 PEWR/L
5 PWLCOM
2 PWRCOM
7 RFCOM
11 R FA
9 RF_ A
10 R FB
8 RF_ B
3 CSHOME
4 G N D
13 COLOR
14 FILM
12 GND
CN 4
Head conn 1
to He ad
Figure A-4. C124 MAIN SUB Board Circuit Diagram
Rev.A A-9
Appendix DLQ-3000 (MINERVA+) Service Manual
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Figure A-5. C124 PSB Board Circuit Diagram
A-10 Rev.A
DLQ-3000 (MINERVA+) Service Manual Appendix
A
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Figure A-6. C124 PSE Board Circuit Diagram
Rev.A A-11
EPSON
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