Epson AP-4500, AP-3000, AP-4000, LQ-1050, LQ-200 User Manual

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EPSON AMERICA, INC.

Product Support Bulletin

EPSON

Subject: Date: 4/3/91

Page(s): 1 of 4

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:

LQ-200/AP-3000

1 beep:

3 beeps:

24 Pin Printer Error and Beep Codes

PSB No: P-0076 Originator JV

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.

BEL code

A Control Panel setting is accepted.

Paper End detected 5 beeps: Abnormal carriage movement On-Line light is flashing:

LQ-500, LQ-510, LQ-1010, LQ-850, LQ-950, LQ-1050, L1000, AP-4000, AP-4500

1 beep:

1 beep: 3 beeps: Paper End detected 5 beeps: Abnormal carriage movement

Printhead is over heated. Carriage will stop until

the printhead cools down.

BEL code (.5 set beep)

A Control Panel setting is accepted

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:

5 beeps:

LQ-860 1 beep: 1 beep:

3 beeps: 5 beeps:

5 beeps:

Abnormal carriage movement

(.5 sec. pause between beeps) +35V supply is abnormal

BEL code (.5 sec. beep)

A Control Panel setting is accepted

Paper End detected Color select mechanism error

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

Abnormal carriage movement

(.5 sec. beep, .5 sec between beeps) CG ROM failure

(.5 sec. beep, .5 sec between beeps) LQ-1500 1 beep:

5 beeps: 5 beeps:

BEL code Paper End detected Abnormal carriage movement

(.5 sec. pause between beeps)

LQ-2500

PSB No: P-0076 Page: 3 of

NOTE:

1 beep: BEL code 5 beeps: 5 beeps:

LQ-2500 LCD Codes: 00 Invalid ID request to CGROM 03

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 PROMS or jumper J1 may be set incorrectly.

Abnormal voltageAbnormal carriage movement

(.5 sec. pause between beeps)

EEROM read/write error

Abnormal carriage movement LQ-2550 1 beep: BEL code 3 beeps: 5 beeps: Abnormal carriage movement (.5 sec. pause between

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

5 beeps:

LQ-2550 LCD Codes:

00 (1)

(2)

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

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

Missing or damaged 7A ROM

Paper End detected

beeps)

Case open

LQ-2550 cont.

PSB No: P-0076 Page: 4 of

A ‘Verify After Write” check to the SRAM has failed. The SRAM could be bad. This is a motor control error.

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)

(2)

CPU error. An undefined op-code was detected.

NOTES:

Four possible areas of failure are:

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.

PE sensor may have failed or is not connected.

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.

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