Digital Equipment Corporation LA310 Service Manual
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Digital Equipment Corporation LA310, LA 310 - Service Manual 6-3 ATTENZIONE La procedura descritta in questo capitolo comporta la rimozione delle coper- ture e deve essere eseguita solo da personale specializzato. ADVARSEL I dette kapitel beskrives bl. a. hvordan man fjerner dekslene rundt systemet. Dette arbeidet må bare utføres av fagfolk. AVISO Os procedimentos descritos neste capítulo respeitam à formo como se retiram as protecções do systema. Dada a sua especificidade, recomendamos que seja axecutado por pessoal especializado. ¡ATENCION! Los procedimientos descritos en este capitulo incluyen el desmontaje de las
Digital Equipment Corporation LA310, 4-8 4.4.4 Parallel Port Loopback Self Test The printer is capable of testing the parallel port using the loopback connector as defined in Figure 4.1. The Parking and FF buttons must be depressed simultaneously before turning power- on and released after power-on initiate this test. The printer shall provide each output signal and check input circuits accordingly. This test is run continuously. Detected failures cause the Fault light to blink and the test to stop. The printer must be powered off to terminate the test. Figure 4.1 Parallel Port Loopback From Printer To Printer BUSY (11) (1) STROBE ACK (10) (2) DATA 1 (5) DATA 4 (8) DATA 7 PE (12) (3) DATA 2 (6) DATA 5 (9) DATA 8 (14) Not U
Digital Equipment Corporation LA310, 4-2 4.2 Power up diagnostic Self test operations to check internal logic are performed automatically at power-up. Detected failures cause the Fault light to blink and the test to stop. The automatic diagnostics include the following tests: 1. a ROM checksum test to verify all bits of ROM 2. a RAM pattern test to exercise and verify all bits of RAM 3. a NVR ( Non Volatile RAM ) checksum test 4. all the control panel indicators remain on for 2 to 4 seconds. This test is applied only if no switch is pressed at power-up. During the NVR test, if the NVR memory is de
LA 310 - Service Manual 6-9 6.6 Printhead Cable Replacement 1. Remove the mechanical assembly. 2. Remove the printhead and unplug the head connector. 3. Remove the printhead cable Installation: Install the printhead cable in reverse order of removal. Note: After printhead replacement it is necessary to adjust the distance between printhead and platen (see pa
Digital Equipment Corporation LA310, 6-2 WARNING The procedures described in this chapter involve the removal of the system covers and should be performed by trained personnel only. ADVARSEL! Ifølge de procedurer, som er beskrevet i dette kapital, skal systemets beskyttelsesplader fjernes; dette bør kun udføres af personer der ved hvordan dette skal gøres. WAARSCHUWING Bij de procedures die in dit hoofdstuk worden beschreven dienen beepaalde delen van de systeemomhulling te worden verwijderd; dit mag uitsluitend worden gedaan door opgeleid personeel. NOTE VAROITUS!) Tässä luvussa kuvatut toimenpiteet liityvät järjestelmän suojakansien irrottaiseen. Ainoastaan koul
Digital Equipment Corporation LA310, 5-8 5.3.3 Print-Related Problems Print faint or poor quality. 1. Is the paper thickness control set correctly for the paper you are using? Adjust if necessary. 2. Have you used the correct paper? chapter 2.3 contains a full specification of the paper you can use. Replace paper if it does not match the specifications. 3. Make sure the ribbon is tensioned correctly. 4. Is the ribbon cartridge properly seated? Reseat as necessary. 5. Does the ribbon need changing? Replace with a new ribbon if necessary. 6. Replace the printhead. 7. Replace the Main Board. Character or characters do not print evenly or are not uniform in pitch. 1. Examine the paper pathway for dirt
6-12 6.9 Power Supply Fuse Replacement 1. Remove the cover 2. Unscrew the screws A, B and C. 3. Lift up the cover D and replace the fuse. Note:Fuse rating: 630 mA for 220/240 V; 1.25 A for 120 V. C D B A Figure 6.9 Power Supply Fuse replacement
Digital Equipment Corporation LA310, 5-2 5.2 Fault Isolation The following sections list possible fault syntoms and give tests you can make and actions you can take to help to clear those syntoms. Table 5-1 indicates what problems are covered in this chapter and where you can find the relevant information. Table 5-1 Problems Covered in this Chapter Problem Areas Section Specific Faults Power related Section 5.3.1 - No indicators on when power is switched on. problems - At power on, the carriage does not move. - Printing does not start. - No respon
Digital Equipment Corporation LA310, 2-4 Fig 2.3 Installing the Cartridge 9. Do not connect the data cable to the host system. 10. Run the print test. The print test is activated from a printer OFF condition, once you have loaded a sheet of paper, switch the printer off. Then,holding down the QUIET key on the operator console, switch the printer on again. Hold the QUIET key down until the mechanical reset has been completed and printing has started, then release it. To interrupt the print test temporarily, open the cover. Closing the cover then pressing the READY key will cause printing to resume
Digital Equipment Corporation LA310, 3-2 3.1 Set-up Mode Switches and Indicators There are five buttons on the operator control panel that perform functions in Set-up mode. Normal mode Set-up mode function function Set-up function Ready Set-up Enter/Exit Set-up mode Quiet/Quality → Next Item LF/Protocol ↓ Select item at cursor Parking ← Previous item FF ↑ Return to previous menu level The buttons are located on the front panel as follows: Fig. 3.1 Control Panel
Digital Equipment Corporation LA310, 5-6 Single sheet paper does not advance. 1. Make sure the tractor/friction feed lever is set to friction feed. 2. The paper feed mechanism may be jammed or broken. Replace the Mechanical Assembly. 3. Replace the Main Board. 5.3.2 Operation-Related Problems LA 310 stops printing. 1. This is an "out of paper" response.Load paper. If the READY indicator is blinking, press the READY button. The LA 310 should continue printing. 2. Make sure the paper is not torn or otherwise damaged. If it is, replace with undamaged paper. 3. Make sure that the connection of the paper edge detector to the Main Board is good.
Digital Equipment Corporation LA310, LA 310 - Service Manual 5-5 No response to computer commands. READY indicator is on. 1. Examine the data cable connections. Reseat the data cable if necessary. 2. Check the condition of the data cable. Replace if damaged. 3. Run the printing self test. If this is not satisfactory, replace the MainBoard. Run the loopback test. If the test gives satisfactory result, the problem may be in the host computer. 4. Examine the features setup for a communications mismatch. Carriage moves, but there is no printout during printin
Digital Equipment Corporation LA310, 6-10 6.7 Main Board Replacement 1. Remove the mechanical assembly. 2. Unplug the power supply connector (1) from the board. 3. Unscrew the three screws (2) to remove the Main Board. Installation: Install the Main Board in reverse order of removal. Note:After Main Board replacement, it is necessary to adjust the paper sensor (see page 4-4). Figure 6.7 Main Board replacement 1 2
Digital Equipment Corporation LA310, LA 310 - Service Manual 6-1 6 REMOVE REPLACE 6.1 General This chapter describes how to remove, replace and adjust major FRUs of the LA 310 MultiPrinter. Figure 6.1 shows the removal sequence of the Field Replacable Units. WARNING Set the power switch to 0 (off) and disconnect the AC power cord when you remove or replace an FRU. RIBBON PLATEN KNOB PAPER GUIDE PANEL GROUP CONSOLE OVERLAY PULL TRACTOR (OPTIONAL) PRINTHEAD PAPER SELECT LEVER MECHANICAL ASSEMBLY CONSOLE ASSEMBLY MAIN CASING MAINS FUSE POWER SUPPLY UNIT MAIN BOARD PRINTHEAD CABLE TOP COVER ASSEMBLY
Digital Equipment Corporation LA310, LA 310 - Service Manual C Appendix C-1 C.1 Set-up Configuration C-1 C.1.1 Set-up Directory C-1 C.1.2 General Main Menu C-2 C.1.3 Protocol Selection Main Menu C-3 C.1.4 Communications Main Menu C-4 C.1.5 DEC PPL2 Main Menu C-5 C.1.6 IBM PP III Main Menu C-6 C.1.7 Epson FX-1050 Main Menu C-7 D Appendix D-1 D.1 General Block Diagram D-1 D.2 DC/AC Power Supply D-2 D.3 BA 298 Board D-4 D.3.1 I/O Signal General Description D-4 D.3.2 CPU and EPROM-SRAM-E2PROM Memories D-4 D.3.3 "LOGO" Custom D-5 D.3.4 Needle Drive Circuit D-5 D.3.5 Paper and Carriage Motor Drive C
Digital Equipment Corporation LA310, 2-14 Ruler The ruler, embossed on the printer bodywork between the platen and the push sprocket, simplifies horizontal alignment of the paper and the guides on the paper support. Fig. 2.12 Ruler Note: The ▲ on the ruler marks the position of the paper present photocell.
Digital Equipment Corporation LA310, 6-6 6.3 Cover Replacement 1. Put the paper selection lever in the friction mode position. 2. Pull off the platen knob and the paper selection lever. 3. Open the top cover, then push up to remove it. 4. Rise the paper guide panel and pull up to remove it. 5. Remove the two mounting screws (A), to remove the upper cover. 6. Push the hook of the control panel case from inside and up to remove it. Installation: Install covers in reverse order of removal. Figure 6.3 Remove the cover A
Digital Equipment Corporation LA310, LA 310 - Service Manual 4-5 adjustment and to save it in NVM. This adjustment is based on the type of paper used. g. Turn the printer off. NOTE: This adjustment may also be performed in friction mode. The setting saved in NVM during this operation is not reset by the FACTORY DFLT function available in the set-up mode. 4.4 Service Tests 4.4.1 Printing Self Test The printer has the capability to execute a printing self test, if paper is loaded. This test consists of printing the 94 printable characters of
Digital Equipment Corporation LA310, 2-10 Internal Sprocket ( Push Tractor ) This device feeds single or multicopy continuous stationery. An optional external sprocket ( Pull Tractor ) can be installed to ease heavy paper feeding. Fig. 2.8 Push Tractor External Sprocket ( Pull Tractor ) The optional pull tractor is required if the heavier types of multicopy continuous statio- nery are used and is mandatory if a paper composition consisting of an original plus four copies is used. It is mounted on top of the rear cover and conveys the printed forms on exit from the platen. The use of this option excludes paper
Digital Equipment Corporation LA310, LA 310 - Service Manual 3-3 3.1.1 Entering Set-up Mode Digital recommends that you enter Set-up mode in tractor-feeding mode, and not cut sheet mode. NOTE: You must not run Set-up mode with the Pull Tractor option installed. To enter Set-up mode: 1. Press and hold the Set-up switch while setting the power switch to ON (1). If you have put paper in the parking position and use tractor feeding, paper is loaded automatically. The printer automatically prints the first part of the Set-up directory: PRINT is the initial default entry. NOTE: If an option cartridge is installed, the type of cartridge is displayed before you enter the Set-up directory, with
LA 310 - Service Manual 7-1 7 CLEANING 7.1 Introduction The LA 310 has been designed as a low maintenance printer. Most of the maintenance needed is determined by the environment in which it operates. High ambient temperatures cause the oil on the paper moving mechanism and carriage to dry out. Dust, dirt atmosphere, and residue from the ribbons and paper coat the internal surface
Digital Equipment Corporation LA310, LA 310 - Service Manual 1-1 1 OVERVIEW The LA 310 is a reliable, low cost, wide carriage, 9 wire dot matrix printer. It is designed to be a personal desk top printer suitable for general business applications in a small to medium computer environment. It has flexible paper handling and is capable of printing on single sheets, continuous forms, multiple part forms, labels, and envelopes. The LA 310 supports serial and parallel interfaces. Both are located on the main board. The serial interface connects with Digital comp
5-10 5.3.4 Ribbon or Carriage-Related Problems Ribbon Problems. 1. Make sure the ribbon is: a. Tensioned correctly. b. Not worn thin or dry. c. Not torn damaged in any other way. d. Not jammed. e. The correct type as recommended by Digital. 2. Replace the Mechanical Assembly. 3. Replace the Main Board. Carriage does not move smoothly. 1. Examine the paper pathw
LA 310 - Service Manual 6-5 6.2.1 Printhead-Platen Distance Adjustment 1. Open the top cover. 2. Remove the paper and the ribbon. 3. Set the paper thickness adjustment lever to position 1. 4. Slacken off the printhead retaining screws (A). 5. Using feeler gauges or the gauge supplied with the new printhead FRU, set the printhead-platen gap to 0.30 − 0.35 mm. 6. Tig
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