Epson LQ 1050 - B/W Dot-matrix Printer Dimensions

EPSON AMERICA, INC.

EPSON

Product Support Bulletin

Subject:

24 Pin Printer Error and Beep Codes

Date: 4/3/91

PSB No: P-0076

Page(s): 1 of 4 Originator JV

Epson printers issue beep tones when certain error conditions exist. Those beeps

can assist you in locating and repairing customer’s printers. The following error

codes are listed by product name.

NOTE:

Most of the beeps issued by the printers are of .1 second duration with a .1

second pause between beeps. Where the beeps or the pauses are longer,

it has been noted in the text. The description “3 Beeps x 2” means two sets

of three beeps.

LQ-200/AP-3000

1 beep: BEL code

1 beep: A Control Panel setting is accepted.

3 beeps: Paper End detected

5 beeps: Abnormal carriage movement

On-Line light is flashing:

Printhead is over heated. Carriage will stop until

the printhead cools down.

LQ-500, LQ-510, LQ-1010, LQ-850, LQ-950, LQ-1050,

L1000, AP-4000, AP-4500

1 beep: BEL code (.5 sec beep)

1 beep: A Control Panel setting is accepted

3 beeps: Paper End detected

5 beeps: Abnormal carriage movement

PSB No: P-0076

Page: 2 of 4

LQ-800, LQ-1000, L750

1 beep: BEL code

1 beep: A Control Panel setting is accepted

3 beeps: Paper End detected

5 beeps:

Abnormal carriage movement

(.5 sec. pause between beeps)

5 beeps:

LQ-860

+35V supply is abnormal

1 beep: BEL code (.5 sec. beep)

1 beep:

A Control Panel setting is accepted

3 beeps: Paper End detected

5 beeps:

Color select mechanism error

(.5 sec. beep, .5 sec between beeps)

5 beeps:

Abnormal carriage movement

(.5 sec. beep, .5 sec between beeps)

5 beeps:

CG ROM failure

(.5 sec. beep, .5 sec between beeps)

LQ-1500

1 beep:

BEL code

5 beeps: Paper End detected

5 beeps: Abnormal carriage movement

(.5 sec. pause between beeps)

PSB No: P-0076

Page: 3 of

LQ-2500

NOTE:

Printers with LCD displays use error messages along with beeps to

inform the user of problems. The following messages will help you to

troubleshoot problems.

A blank LCD screen with the Power-on LED lit can be caused by a bent

pin on one of the PROM

or jumper J1 may be set incorrectly.

1 beep: BEL code

5 beeps: Abnormal voltage-

5 beeps: Abnormal carriage movement

(.5 sec. pause between beeps)

LQ-2500 LCD Codes:

00 Invalid ID request to CGROM

EEROM read/write error

LQ-2550

Abnormal carriage movement

1 beep: BEL code

3 beeps:

Paper End detected

5 beeps: Abnormal carriage movement (.5 sec. pause between

beeps)

5 beeps: Platen Gap adjustment error (.5 sec. pause between

beeps)

5 beeps: Case open

LQ-2550 LCD Codes:

00 (1)

The font could not be found. The printer’s internal program could not

find the target font.

(2)

Missing or damaged 7A ROM

Internal ROM check does not match. The versions may have been mixed.

PSB No: P-0076

Page:

LQ-2550 cont.

A ‘Verify After Write” check to the SRAM has failed. The SRAM could be bad.

This is a motor control error. Four possible areas of failure are:

a. CR home condition not detected at power up

b. Platen gap motor HP not detected correctly

c. Friction/Tractor feed switching error

d. Physical obstruction such as a jammed ribbon

Skewed paper detect error. Since the initial reading upon loading a single

sheet paper, the paper has skewed. This is a printhead wire protection

feature.

Illegal paper positioning.

(1)

If the paper is loaded using the knob instead of the LOAD/EJECT switch,

this error condition will occur. This is a printhead wire protection feature.

(2)

PE sensor may have failed or is not connected.

CPU error. An undefined op-code was detected.

NOTES:

Error codes 11 and 12 are usually caused by new operators who are

un-familiar with the machine. Both of these errors are corrected by

turning the printer off, taking out the paper and turning the printer back

on. Both features were added to ensure proper paper handling and

prevent paper jams, which can result in printhead failures.

Incorrect jumper settings on the ROMA board may cause errors 10 or

20. The correct settings are documented in the Service Manual (page

A-54, figure A-52) and on TIB LQ2550-005.

Errors 0,2, 3, 10, and 20 may require a repair, adjustment or

replacement.

Product Support Bulletin

Subject:

Power Specifications

Date: 2/7/90 PSB No: P-0060

Page: 1 of 2 Originator: RFB

The following information is a list of the power requirements for

the Epson 9 and 24 pin printers and laser printers.

504

VA maximum

PSB No: P-0060

Page: 2 of 2

Product

Voltage

Max.

Current

Consumption

Power

Consumption

BTU/HR

LX810

12ov

Amp 84

maximum

286.69

T750 120v 1.0

Amp

120

maximum

409.56

TlOOO

120v

Amp 84 VA

maximum

286.69

If the power requirements of a particular Epson printer is not listed please

refer to the appropriate User's Manual for the electrical specifications.

In the event that the User's Manual is not available, locate the silver label

on the back of the Epson printer.

This is a reliable source for the electrical

requirements.

The following formula is used to calculate the electrical

power requirements:

VOLTAMPS is equivalent to WATTS

VOLTAMPS = Volts * Amps

AMPS

BTU/HR

= Voltamps/Volts

= Watts * 3.413

Example:

120V

1A =

120VA

120VA/120V

120VA

equivalent

120W

3.413

409.56

BTU/HR

Heat

output

rated

BTU/HR.

EPSON

EPSON AMERICA, INC.

INFORMA

Product Support Bulletin

Subject:

Tractor Pin Alignment

Date: 5/15/89

PSB No: P - 0044

Page: 1 of 1

Originator: RP

The purpose of this bulletin is to insure the proper installation and alignment of

the FX- 850/1050 and LQ- 850/1050 push tractor assemblies.

There are two possible ways to install the tractor frame on the push tractor

assembly. If the frame is installed incorrectly, the tractor belt pins on the two

tractors will not be aligned, and the resulting printout appears to be slanted on

the page, or the perforated edge will be tom. This is caused by the marks on

the tractor shaft holders being 180 degrees ‘out of phase.’

When assembling a tractor, there are two grooves in the shaft, and two tabs

on the tractor shaft holder. lf the pins on both tractor belts are not aligned, it

will be necessary to disassemble the tractor, and rotate one tractor shaft holder

180 degrees, to bring it back into alignment with the other shaft holder.

Alignment can be verified by examining the marks in the shaft holders, which

will both be in the forward position when properly aligned, as shown in

Figure

4- 51 below.

Figure 4-51. Tractor Assembly

Phases

PRODUCT SUPPORT BULLETIN

PSB NO.: P-0035

DATE: 11/29/88 PAGE: 1 of 3

SUBJECT: LQ-850/950/1050 PRINTER QUESTIONS

How do I get the short tear off feature to work?

The first step is to turn the dip switch 2-7 to the "ON"

position.

Then there are two ways to activate the short

tear off.

The first way is to send a form feed at the end

of each page.

The second way is to send 66 lines of data

to the printer.

In both instances data transmission must

stop for a minimum of 3 seconds before the feature is acti-

vated.

When printing on single sheets,

lines.

each page drops down several

Why?

The number of printable lines on single sheets are 61 or 62.

Change the number of lines/page in your software package.

Where are the P-ROM and Character Generator ROM located on

the main board of the LQ-850/950/1050?

The P-ROM is in location 9A. The Character Generator ROM

is in location 6A.

What size buffer does the LQ-850/950/1050 have?

6K bytes or OK bytes. This is selectable by dip switch 1-8.

What are the printing speeds?

The printing speeds are:

Pitch Quality Characters/Second

Draft

220

Draft

264

What ribbons does the LQ-850/950/1050 take?

Printer Standard Ribbon Film Ribbon

LQ-850 #7753 #7768

LQ-950 #7767

#7769

LQ-1050

#7754 #7770

Does the LQ-850/950/1050 support color?

A: No.

EPSON AMERICA SERVICE, 23610 TELO AVENUE, TORRANCE, CALIF. 90505

NUMBER: P-0035 PAGE: 2 of 3

What fonts are built into the LQ-850/950/1050?

Draft

Roman(10cpi, 12cpi, 15cpi)

Roman Proportional

Sans Serif(10cpi, 12cpi, 15cpi)

Sans Serif Proportional

Are there any optional fonts available?

Courier(10cpi, 12cpi, 15cpi) :

Font Module #7400A

Prestige(10cpi, 12cpi, 15cpi) : Font Module #7401A

Script(10cpi, 12cpi, 15cpi) :

Font Module #7402A

OCRB(10cpi)

Font Module #7403A

Orator(10cpi)

Only Available with #7407

Orator-S(10cpi)

Only Available with #7407

Multi-Font Module*

Font Module #7407

Multi-Font Module contains all the above listed fonts.

It is available for the LQ-950 and LQ-850/1050 with the

upgrade (LQ850/1050U).

What type of paper feeds do they support?

Friction

Built-in push feed tractor with paper tension unit.

Single bin or dual bin Cut Sheet Feeder (optional)

Pull Tractor (optional)

What size envelopes can they print on?

Number 6 and number 10 envelopes.

What are the paper thickness specifications for multi-

part forms?

It will print on continuous multi-part carbonless forms,

with one original and up to 3 copies. The maximum paper

thickness should not exceed 0.0126 inches.

If it comes with the built-in push feed tractor unit,

why does it need an optional pull tractor?

When printing on multi-part forms, the optional pull

tractor keeps the forms taut for more consistant

paper feeding.

How do I switch from parallel to serial in the printers?

The dip switches on the back of the printer determine

which interface is being used.

NUMBER: P-0035

PAGE:

3 of 3

What if I want to install an optional serial interface

board?

Install the optional interface as detailed in the User's

Manual.

Then set the dip switches on the printer to the

parallel position and then set the dip switches on the

optional interface board to enable it.

Which optional serial interface boards will work?

The two current serial interface boards that work are the

8143 and the 8148.

If I want to use the built-in serial interface on the

printer,

what cable do I use?

Epson markets two cables that allow direct connection to

personal computers. When connecting the 6 pin DIN to an

IBM PC/XT or compatible DB-25 serial port use cable #8297.

When connecting to an IBM AT or compatible 9 pin serial port

use cable #CA-070.

Does the LQ-850/950/1050 support the legal character set?

The LQ-950 does have the legal character set built in.

The

LQ-850/1050 needs the upgrade kit (kit #LQ850/1050U) to

support the legal characters.

What is the upgrade kit for the LQ-850/1050?

The upgrade kit, #LQ850/1050U, upgrades the printer to allow

the use of the new dual bin cut sheet feeder (product code

for the LQ-850 = #7346 and for the LQ-1050 = #7348).

What does the upgrade kit contain?

It has a new P-ROM, instruction sheet, an errata sheet and

a new user's manual.

Is the upgrade kit for the LQ-950 too?

No, the LQ-950 comes standard with the upgrade built in.

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