Epson DLQ-3000 Minerva+ User manual

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.
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REVISION SHEET
Revision Issue Date Revision Page
A March 15, 1996 - 1st issue
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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).
DLQ-3000 (MINERVA+) Product Description
Rev.A 1-1

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 STROBE pulse
Handshaking: By BUSY and 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 (n)
DATA
-STORBE
BUSY
-ACKNLG
500 ns (min.)
500 ns (min.) 500 ns (min.) 0 (min.)
0 (min.)
500 ns ~10 µs
0 (min.) 500 ns (max.)
DATA (n+1)
Figure 1-1. Data Transmission Timing
Product Description DLQ-3000 (MINERVA+)
1-2 Rev.A

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 Return
GND Pin I/O Description
1STROBE 19 In Strobe pulse. Input data is latched at the falling
edge of this signal.
2-9 DATA1-8 20-27 In
Parallel input data to the printer.
Active-HIGH input.
LSB: DATA1
MSB: DATA8
10 ACKNLG 28 Out Indicates that data has been received and the
printer is ready to accept more data.
11 BUSY 29 Out A HIGH level means the printer cannot accept
further data.
12 PE 30 Out A HIGH level means a paper-out error. Always
the logical opposite of the ERROR signal.
13 SLCT - Out Always at a HIGH level (pulled up to +5 V
through a 1K-ohm resistor).
14 AFXT - In
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 INIT 16 In Initialize printer. Minimum 50 µs pulse is
necessary. Active-LOW signal.
32 ERROR - Out A LOW level means that an error has occurred.
36 SLIN 30 In Not used.
18,35 Logic H - Out 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.
17 Chassis GND - - Chassis GND
16,19-30,
33 GND - - Signal GND
15,34 NC - - Not used. Not connected.
Note: In/Out refers to the direction of signal flow as viewed from the printer.
DLQ-3000 (MINERVA+) Product Description
Rev.A 1-3

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;
Product Description DLQ-3000 (MINERVA+)
1-4 Rev.A

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 Return
GND Pin I/O Description
1 Host Clk 19 In Host clock signal.
2-9 DATA 1-8 20-27 In
Parallel input data to the printer.
Active-HIGH input.
LSB: DATA1
MSB: DATA8
10 Ptr Clk 28 Out Printer clock signal
11 PtrBusy /
Data Bit -3,7 29 Out Printer BUSY signal and reverse channel transfer data bit 3 or 7.
12 Ack Data Req /
Data Bit -2,6 28 Out Acknowledge data request signal and reverse channel transfer data bit 2 or 6.
13 Xflag /
Data Bit -1,5 28 Out Xflag signal and reverse channel transfer data bit 1 or 5.
14 Host Busy 30 In Host busy signal
31 INIT 30 In Not used.
32 Data Avail /
Data Bit -0,4 29 Out Data available signal and reverse channel transfer data bit 0 or 4.
36 1284-Active 30 In 1284 active signal
18 Logic H - Out A high signal indicates that all other signals
source by the peripheral are in a valid state.
35 +5V - Out This line is pulled up to +5V through 3.3K Ω
resister.
17 Chassis - - Chassis GND
16,19-30
,33 GND - - Signal GND
15,34 NC - - Not used. Not connected.
Note: In/Out refers to the direction of signal flow as viewed from the printer.
DLQ-3000 (MINERVA+) Product Description
Rev.A 1-5

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.
Product Description DLQ-3000 (MINERVA+)
1-6 Rev.A

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.
TYPE-B I/F
PARALLEL I/F
CN10-12
SERIAL I/F
CN7
CN8
CN6
CN9
CN1
CN2
CN3
CN4
CN5
CN13
CN14
CN 15,16 temp.
AC
Fan motor
C124PSB/PSE
Printer MechanismC124 MAIN-B
Panel
Cover Open Sensor
Printhead
CS Motor
Film Ribbon Sensor
Color Ribbon Sensor
PEWSensor Assembly
CR Motor Assembly
PF Motor Assembly
LOAD Sensor Assembly
External Fan
PF Sensor
HP Sensor
Figure A-1. Cable Connection
DLQ-3000 (MINERVA+) Service Manual Appendix
Rev.A A-1