Epson Lq 2550 Quick Reference Guide Product Support Bulletin
Epson-Lq-2550-Impact-Printer-Product-Support-Bulletin-663698 epson-lq-2550-impact-printer-product-support-bulletin-663698
2014-07-05
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EPSON EpsoNAuEmcA,Nc. Product Support Bulletin Subject: Epson LQ Color Driver for Microsoft Windows 3.0 and 3.1 Date: 4/3/92 Page(s): 1 of 3 PSB No: P-0087 Originator: RSS The purpose of this bulletin is to announce the availability of an additional color driver for the LQ-860, LQ-2500, and LQ-2550 for the Microsoft Windows 3.0 and 3.1 environments. This driver is primarily intended to provide Device Independent Bitmap (DIB) support for Windows based application software. The most popular of these is Paintbrush which is included with Windows 3.0 and 3.1. When upgrading to Microsoft Windows version 3.1, it is recommended to use the Epson driver that is included with that version of Windows. The Microsoft Windows version 3.1 drivers have DIB support built-in, in addition to new enhancements. This bulletin also contains information regarding how the driver is being distributed. In addition, specifications on the color driver and instructions on how to install the driver into your Windows Package are included. DISTRIBUTION The Microsoft Windows LQ Color Driver is available from the following sources: 1) The driver can be ordered from Accessory Marketing. The part number is WINCOLOR. To place an order with Accessory Marketing call (800) 9228911. For a limited time the driver is being distributed free of charge. 2) The driver is available from CompuServe. After logging into CompuServe, to access the Epson Forum, type ‘GO EPSON” at the prompt. 3) The Epson Bulletin Board is the final means for accessing the driver. The Epson BBS number for consumers is (310) 782-4531. SPEClFlCATlONS The driver consists of 3 files: GENDRV.DLL, EPSON24C.DRV, and OEMSETUP.INF. PSB No: P-0087 Page: 2 of 3 The fonts supported are: Courier, Roman, San Serif, Prestige, Script, OCR-A, OCR-B, Orator, Orator-S. Graphic densities supported: (Horizontal x Vertical) 360x 180, 180x 180, 120x 180. Paper Sources: Tractor, Bin 1, Bin 2, Manual. Cartridge or Optional Fonts: Mu&font Cartridge Paper Size: Letter, 8 l/2 x 11 in. Letter, 11 x 8 l/2 in. Legal, 8 l/2 x 14 in. Fanfold, 14 7/8 x 11 in. Tabloid, 11 x 17 in. A4,210 x 297 mm A3,297 x 420 mm Fanfold, 210 x 305 mm Fanfold, 358 x 305 mm #6 envelope, 6 l/2 x 3 5/8 in. #lO envelope, 9 l/2 x 4 l/8 in. INSTALLATlON INSTRUCTlONS 1) Choose Control Panel from the Main Group window in Program Manager. The Control Panel window appears. 2) Choose the Printers icon. The Printers dialogue box appears. 3) Choose the Add Printer button. The dialogue box expands to display a list of printer-driver files. 4 Select ‘Unlisted Printer” at the end of the display. 5) Choose Install. 6) Select the correct drive and path to find the Windows driver. 7) Select the ‘EPSON LQ COLOR” and choose OK. PSB No: P-0087 Page: 3 of 3 8) Define the new driver as ACTIVE to begin using it immediately. Refer to the MS Windows User’s Manual for further information about printer-driver installation. NOTES The LQ-2500 is only supported with tractor paper. This is because in single sheet mode or CSF mode the printer has a large top and bottom non-printable area. For best results you should print at 360 x 180 DPI for normal printing and 180 x 180 DPI for draft printing. EPSON EPSONANEFUCA, mc. Product Support Bulletin Subject: 24 Pin Printer Error and Beep Codes PSB No: P-0076 Originator JV 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: Most of the beeps issued by the printers are of .I second duration with a .l 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-2OO/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, Ll 000. AP-4000. AP-4500 1 beep: BEL code (.5 set 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-1 OOd. 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: +35V supply is abnormal LQ-860 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 set between beeps) 5 beeps: Abnormal carriage movement (.5 sec. beep, .5 set between beeps) 5 beeps: CG ROM failure (.5 sec. beep, .5 set 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 4 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 PROMS or jumper Jl 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 03 EEROM read/write error 10 Abnormal carriage movement LQ-2550 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 L&2550 LCD Codes: 00 (1) (2) 02 The font could not be found. The printer’s internal program could not find the target font. Missing or damaged 7A ROM Internal ROM check does not match. The versions may have been mixed. PSB No: P-0076 Page: 4 of 4 LQ-2550 cont. 03 A ‘Verify After Write” check to the SRAM has failed. The SRAM could be bad. 10 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 11 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. 12 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. 20 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. Enors 0,2, 3, 10, and 20 may require a repair, adjustment or replacement. EPSON EPSON AMERICA, INC. INFORMA Product Support Bulletin Subject : LQ - 2550 Error Codes 11 and 12 Date: 4/11/90 Page: 1 of 1 PSB No: P-0064 Originator: ASB There are two new error codes which can occur in printers with ROM version 022287 or higher. They are error 11 and error 12. Error 11 indicates that the paper is not straight. Error 12 indicates that the paper was loaded using the platen knob instead of the LOAD/EJECT button. When these errors occur, the printer stops, the audible alarm sounds, and one of these two error messages will appear on the front panel. The solution to both of these errors is the same. Follow the steps below: 1. Turn the printer off. 2. Remove the paper. (Use the platen knob if necessary.) 3. Turn the printer back on. 4. Load the paper using the LOAD/EJECT button as described in the manual. OR 4. If you are using a sheet feeder, begin printing again. The printer automatically loads the paper. NOTE: Use the platen knob only for removing jammed paper. Never use it when you are loading paper. Use the LOAD/EJECT button for loading the paper. EPSON AMERICA, INC. Product Support Bulletin Subject: Power Specifications Date: 2/7/90 Page: 1 of 2 PSB No: P-0060 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 Max. Current 1 Voltage 1 Consumption 1 Power Consumption 1 BTU/HR LX810 1 12ov .7 Amp 84 VA maximum T750 120v 1.0 Amp 120 VA maximum 409.56 TlOOO 120v .7 Amp 84 VA maximum 286.69 I 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 VOLTAMPS AMPS BTU/HR is equivalent to WATTS = Volts * Amps = Voltamps/Volts = Watts * 3.413 Example: 120V * 1A = 120VA 120VA/120V = 1A 120VA is equivalent to 120W 120W * 3.413 = 409.56 BTU/HR Heat output is rated in BTU/HR. EPSON EPSON AMERICA, INC. INFORMATION Product Support Bulletin Subject: LQ - 2550 Selectype Functions Date: 9/12/89 Page: 1 of 2 PSB No: P-0050 Originator: ML This describes the Selectype functions in detail. Macros and defaults are changed in the same manner. This subject is also covered in the User’s Manual on pages 3 - 12 through 3 - 29 and in the Technical Manual on pages 1 - 30 through 1 - 33. Selectype Functions 1 Press the “Selectype” button on the front panel. 2 The arrows will be flashing and the LCD panel will read “Selectype Mode”. 3. The LCD panel changes to read: “Load Macro”. 4. Press the Line Feed Button (the flashing down arrow) to reveal on the LCD panel, “Change Macro”. 5. To change the macro, press the Load/Eject button to enter the “Change Macro” mode. 6. Use the tine Feed button (the flashing down arrow) to select the function to be changed. 7. To change the desired function, such as font, pitch, country, etc..., within the “Change Macro” mode, press the Load/Eject button. 8. To change the selection of the function, use the Form Feed button (the flashing up arrow) or the tine Feed button (the flashing down arrow). 9. Once the desired functions within “Change Macro” are selected, press the On - tine button. 10. Press the On - tine button a second time to save the macro. 11. Wait for the LCD panel to read “Save Macro”. 12. Press the Load/Eject button to select save. 13. The LCD panel will then read “Macro #X Saved” momentarily and then will read “Change Macro”. 14. Press the “Selectype” button to exit Selectype. Tips for other Selectype uses 1. When changing the defaults, reset the printer by cycling the Power switch. PSB NO: P-0050 Page: 2 of 2 2. Use the above directions for both the “Change Macro” and “Change Defaults” modes. 3. Use Macro #1 for the settings that are used most often. 4. Set Macros #2- #4 for other needed settings. 5. When a different macro is needed, enter the Selectype and choose “Load Macro” with the Load/Eject button. 6. Press the tine Feed button (the flashing down arrow) to change the macro number to load. EPSON EPSON AMERICA, INC. INFORMATION Product Support Bulletin Subject: . CENTRONICS PARALLEL REQUIREMENTS TO ELIMINATE RANDOM Date: 7/24/89 Page: 1 of 1 PSB No: P-0048 Originator: ML The self test can be run in draft mode or Letter Quality mode, depending on which button is held down as the printer is turned on. With the color ribbon cartridge installed, the self test prints in seven colors (black, magenta, cyan, violet, yellow, red, and green). Some colors require two passes, such as yellow and blue combined to make green. When a black ribbon is installed in the LQ-2550 and the self test is run, some lines of the self test are printed in double-strike mode. The printer is making the double passes for the color test, leaving a light and dark appearance to the printout. The self test cannot detect whether a black or color ribbon is installed before printing is executed. The self test can be performed using paper that is at least 8 - 1/2 inches wide, but wide carriage paper is recommended. To perform the self test, follow the instructions below: 1. The power cable is connected to a properly grounded electrical outlet. 2. The printer is turned off and the ribbon is installed. 3. While holding down the LINE FEED button (draft mode) or the FORM FEED button (Letter Quality mode), turn on the printer. The printer will beep three times and the POWER and PAPER OUT lights will turn on, if paper is not installed in the printer, 4. Press the PAPER SELECT button until the type of paper desired is selected. 5. Adjust the tractors or the paper guides to accommodate the size of the paper being using. 6. Press the LOAD/EJECT button once, to automatically load the paper. 7. Press the ON LINE button, to start the self test. 8. A list of the printer’s current settings is printed first, followed by a series of characters. The self test continues until the paper runs out or until the printer is reset. 9. Press the LOAD/EJECT button, to eject the paper, and turn the printer Off. 10. After the printer is turned off, always wait at least 5 seconds before turning it back on. EPSON EPSON AMERICA, INC. SERVICE PSB N0.:P-0033 PRODUCT SUPPORT BULLETIN DATE: 10/12/88 PAGE: 1 of 2 SUBJECT: THE MOST ASKED LQ-2550 QUESTIONS Q: Is there an optional color kit? A: No, color is standard. Q: How many colors in the ribbon? A: The four colors combine to print out 7 different colors. Color can be set in the macros and other color selection is software controlled. Q: Does the color ribbon come with the printer? A: Yes. Q: What print driver in my software package, do I choose? A: If that is LQ-2500 is the most compatible driver to use. not available, any other LQ driver should be compatible. If there is not-an LQ driver available, then an Epson 9 pin will work in most text cases. Q: If my graphics software package does not support the LQ-2550 or LQ-2500 in color, then which driver should I choose? Al Use a JX driver with LQ Patch (made b MAPP Systems, available through Accessory Marketing J for color graphics. Q: Does it have foreign characters? A: It has all the foreign characters that are present in the extended IBM character set. Q: Does the scanner for the LQ-2500 printer work with the LQ-2550? A: No. Q: Can the LQ-2500 ribbons be used in the LQ-2550? A: NO, the LQ-2500 ribbons cannot be used in the LQ-2550, but the LQ-2550 ribbons can be used in the LQ-2500. Q: How many copies in multi-part forms will it print? A: 1 original and up to 5 copies, with a maximum paper thickness of 0.46 mm (.018"). EPSON AMERICA SERVICE, 23610 TEL0 AVENUE, TORRANCE, CALIF. 90505 PAGE: NUMBER: No.P-0033 Q: How do I set the macro defaults when installing an optional serial (or buffer) interface board? A: The Set the macro defaults to the parallel interface. optional interface board is enabled by setting the dip switches on the board to their proper configurations. Q: How are the macros and defaults set? A: For Use the SelecType functions on the front panel. more detailed instructions, refer to the User's Manual (pages 3-8 to 3-41). Q: Do I need a multi-font cartridge? A: No, there are 7 fonts + draft built in. Q: What options are available for the LQ-2550? A: The following is a list of options for the LQ-2550: 7343-A Dual Bin Cut Sheet Feeder 7314-A Pull Tractor I 7762 I Black Ribbon I 7763 II Color Ribbon I 8148 I 8k Buffer Serial Interface I I 8143 Serial Interface 8172 32k Buffer Centronics Interface Board II 1 2 of 2 EPSON EPSON AMERICA, INC. PRODUCT SUPPORT BULLETIN SERVICE PSB NO.: P - 0 0 10/04/88 3 DATE: 1 PAGE: 1 of 1 SUBJECT: CENTRONICS PARALLEL REQUIREMENTS TO ELIMINATE RANDOM CHARACTERS USING THE LQ-2500 AND LQ-2550 The purpose of the bulletin is to resolve the problem of random characters generated by the LQ-2500 and the LQ-2550. We have received numerous reports from the field regarding this problem. After intensive testing, the problem was isolated to improper Centronics parallel cables. The types of problems encountered were: (1) (2) Unsuitable shielding - some cable manufactures neglect The cables to include the twisted pair grounds. without proper shielding allow electronic fields to affect the data transfer, thus causing extraneous characters. Shielded cables encase the data lines to protect against external noise. Unacceptable use of parallel communications - The recommended length of a parallel cable is 6 to 10 feet long. When a parallel cable is longer than 10 feet, the flow may become inconsistent causing random For data transfer over characters to be printed. 10 feet in length serial communications is recommended. If the two issues noted above are corrected, the majority of the problems regarding random characters should be eliminated. Proper shielding should always be verified before any other work is initiated. Many of the older inexpensive cables were manufactured without shielding to help keep production costs down. The length of a Centronic parallel cable should be kept to a maximum of 10 feet for optimum performance. For data transmission over 10 feet in length serial communications is recommended. EPSON AMERICA SERVICE, 23610 TEL0 AVENUE, TORRANCE, CALIF, 90505 EPSON EPSON AMERIC& INC. Product Support Bulletin Subject: Quick Reference for Current Dot-Matrix Printer Print Speeds Date: 10/9/92 Page(s): 1 of 1 PSB No: P-0030C Originator: SLS 9-PIN PRINTERS / Model1% l%Y D”:,“n”-“,““c”p4 legal llLFPI AP-2250 200 CPS 240 CPS n/a 40 CPS 48 CPS LX-81 0 200 CPS 240 CPS n/a 40 CPS 48 CPS , FX-870/1170 11 285 CPS 1 342 CPS I 380 CPS I 57 CPS I 68 CPS II 11 DFX-5000 DFX-8000 400 CPS 480 CPS 533 CPS 80 CPS 1 96 CPS 1) 11 800 CPS 1 960 CPS I 1066 CPS 1 160 CPS 11921 240PIN P R I N T E R S Model Draft 10 CPI Draft 12 CPI High-Speed Draft 10 CPI 1 lc%Pl / IEPI 1 60 CPS 1 72 CPS AP-3250 167 CPS I 200 CPS n/a LQ-570/1070 210 CPS 252 CPS 225 CPS 70 CPS 84 CPS 246 CPS 295 CPS 300 CPS 82 CPS 98 CPS 275 CPS 1 330 CPS 3OOCPS 1 9 2 C P S I IIOCPS ~LQ-860 LQ-870/1170 ~LQ-2550 333 CPS I 400 CPS ~ n/a 1 111 CPS I 133CPS GLOSSARY OF TERMS CPI: Characters Per Inch CPS: Characters Per Second Draft: Draft uses a minimum number of dots per character for high-speed printing. Elite: 12 Characters Per Inch (12 CPI) Pica: 10 Characters Per Inch (10 CPI) Letter Quality reduces the print speed and increases the number of dots per LQ: NLQ: character to increase the print quality. (24-pin printers only) Near Letter Quality reduces the print speed and increase the number of dots per character to increase the print quality. NLQ printing requires two passes per character. (9-pin printers only) EPSON EPSON AMERICA, INC. Product Support Bulletin Subject: Quick Reference for 9/24 Pin Printer Paper Specifications Date: 10/9/92 Page(s): 1 of 1 PSB No: P-0022D Originator: SLS This PSB provides a quick reference for the paper specifications on Epson’s current line of 9-pin and 24-pin dot-matrix printers when using continuous paper. The ‘Maximum No. of Copies” is the maximum allowable number of copies when using continuous multi-part carbonless paper. The “Total” number is the maximum allowable number of copies including the original. The ‘Maximum Total Thickness” is the maximum allowable total thickness including the original plus any copies. 9-PIN PRINTERS Model AP-2250 Orig. + Maximum No. of Copies Total Maximum Total Thickness 1 2 3 I 0.0098” (0.25mm) LX-810 1 2 3 I 0.0098” (0.25mm) FX-870/1170 1 3 4 I 0.0126” (0.32mm) DFX-5000 (Front Tractor) (Rear Tractor) 1 1 5 3 6 4 0.018’ 0.012” (0.46mm) (0.30mm) DFX-8000 (Front Tractor) (Rear Tractor) 1 1 5 3 6 4 0.018’ 0.012” (0.46mm) (0.30mm) l 24-PIN PRINTERS Orig. + Maximum No. of Copies Model Total Maximum Total Thickness AP-3250 * I 1 1 I 2 0.0071” (0.18mm) LQ-570/1070 I 1 3 I 4 0.0126” (0.32mm) LQ-860 I 1 3 I 4 0.0126” (0.32mm) LQ-870/1170 I 1 3 I 4 0.0126” (0.32mm) LQ-2550 I 1 5 I 6 0.018’ * Note: (0.46mm) The AP-2250 and AP-3250 require an optional push tractor to use continuous paper. EPSON EPSON AMERICA, INC. INFORMATION Product Support Bulletin Subject: Epson Dot - Matrix Printer Options and Accessories Date: 8/1/89 Page: 1 of 2 PSB No: P-0017B Originator: RFA 9 - PIN DOT MATRIX OPTIONS U-810 FX-850 FX-1050 DFX-5000 c8ooo61 7311 -A 7312-A 8309-A c806121 WA 7339-A 7348-A 7340-A 7348-A WA N/A 8750 8750 8755 8786 8143 8148 8172 8165 8143 8148 8172 8165 8143 8148 8172 8165 8143 8148 8172 8165 Cl -QE-A Cl -9E-A Cl -QE-A Cl -QE-A =I; EiZx EEx g:; CPD-552 CPD-552 KP - STAND 8501-A TRACTOR UNITS PULL TRACTOR CUT SHEET FEEDERS SINGLE BIN DOUBLE BIN RIBBONS STANDARD (BLACK) INTERFACE BOARDS SERIAL SERIAL PARALLEL I E E E 488 - OK BUFFER 8K B U F F E R 32K BUFFER 8K B U F F E R CABLES STANDARD IBM PARMLEL SERlAL DB-25 TO DB-9 SERIAL 06-25 TO 08-25 MISC. PRINTER ACCESSORIES PRINTER STAND PSB No: P-0017B Page: 2 of 2 24 - PIN MATRIX OPTIONS LO-510 LO-850 LO-95Q LO-1050 LO-255Q C8OOWl 7311 -A 7313-A 7312-A 7314-A c806121 WA 7339-A 7346-A 7345-A 7347-A 7346-A 7348-A WA W-A n53 WA 7768 7767 WA 7769 7754 WA 7762 7763 77w 8143 8148 8172 8185 8143 8148 8172 8165 8143 8148 8172 8165 8143 8148 8172 8165 Cl -9E-A Cl -QE-A Cl -9E-A Cl -9E-A E-i WA WA WA WA E-X z:; =I; iz 8239 zi 8239 WA WA VA WA TRACTOR UNITS PULL TRACTOR CUT SHEET FEEDERS SINGLE BIN DOUBLE BIN INTERFACE BOARD8 SERIAL - OKBUFFER - 8K BUFFER PARALLEL - 32K BUFFER IEEE 488 8K BUFFER 8143 8148 8172 8165 CABLES STANDARD IBM PARALLEL SERJAL DB-25 TO DB-9 SERIAL 08-25 TO 08-25 SERAl DIN-8 TO DB-9 SERM DIN-6 TO DB-25 APPLE ][e. 08-25 TO DIN-6 APPLE ][c. DIN-6 TO DIN-S FONT MODULES COURIER PRESTIGE ELFi3 MULTI 7400A 74OlA 74a2A 74mA 7407-A 74mA 7401A 7402A 74mA 7407-A 74mA 7401A 7402A 7403A 7407-A 74m4 7401A 74aA 740s 7407-A 7400A 74OlA 7402A 74wA 7407-A DCB-LO2 DCB-LO2 C842001 LO1 CPD-552 DCB - LO2 DCB-LO2 C8UOO1 LO1 KP - STAND DCB-Lo2 MISC. PRINTER ACCESSORIES WNDWVS DRIVER SOFTWARE APPLE MAC LO -ARE LQ PATCH SOFWARE PRJNTER STAND El= CPD-552 ZYO’ KP - STAND i?iF1 KP - STAND EPSON EPSON AMERICA, INC. Product Support Bulletin Subject: Quick Reference for Printer Acoustic Noise Levels PSB No: P-0016D Originator: SLS Date: 6/5/91 Page(s): 1 of 2 Sound intensity is measured in units called Bels (named after Alexander Graham Bell,) or more commonly in tenths of this fundamental unit: decibels. In making noise measurements a weighting network is applied in an attempt to match the frequency response of the instrument to that of the human ear. The most common is the A weighting network, with resulting measurements expressed in dB(A). The following is a list of current product’s noise levels tested in accordance with standards set by the International Standards Organization (ISO). The acoustic noise levels for the 9 pin printers are averages while printing in Near Letter Quality (NLQ) mode using continuous paper and are not guaranteed figures. The acoustic noise levels for the 24 pin printers are averages while printing in Letter Quality (LQ) mode using continuous paper and are not guaranteed figures. The acoustic noise levels for the laser printers are averages while using single sheet paper and are not guaranteed figures. 9 PIN PRINTERS MODEL I I I 1 NOISE LEVEL IX-81 0 56 dB(A) FX-850 56 dB(A) FX-1050 56 dB(A) II DFX-5000 I 55 dB(A) II DFX-8000 I 55 dB(A) II 24 PIN PRINTERS 11 LQ-510 56 dB(A) LQ-1010 56 dB(A) LQ-850 1 56 dB(A) 11 PSB No: P-0016D Page: 2 of 2 MODEL NOISE LEVEL LQ-860 55 dB(A) LQ-1050 55 dB(A) LQ-2550 55 dB(A) LASER PRINTERS