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Centronics 730-1 Owner's Manual

Centronics 730-1 Manual Online:

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Centronics 730-1 User Manual
Centronics 730-1 User Guide
Centronics 730-1 Online Manual

Text of Centronics 730-1 User Guide:

  • Centronics 730-1, PREVENTIVE MAINTENANCE (cont'd) ITEM FREQUENCY PROCEDURE Carriage Guide Bars 6 Months Move print head to left side of printer. Apply several drops of lubricating oil to clean, lint- free cloth and lightly rub carriage guide bars to remove any build-up of residue. Move print head to right side of printer and repeat procedure. Paper Drive Roller 6 Months Using a lint-free cloth, clean the paper drive roller and plate bushings. After cleaning, apply one drop of light lubricating oil to both paper roller end plate bushings. Cycle the paper roller using the thumbwh

  • Centronics 730-1, ROLL PAPER HOLDER INSTALLATION 1 . Set the printer on a flat surface with enough room in back of the printer for the roll paper holder. 2. Refer to Figure 2 and squeeze the support arms together slightly. 3. Insert support arms into two holes provided at rear of printer and release support arms. 4. Remove core hub from plain end and insert roller through standard 1-inch paper roll core and place roll on holder as shown with paper feeding from bottom of roll. m \ SLIDE CORE ON AXLE FOR PROPER ROLL ALIGNMENT £ 7

  • Centronics 730-1, Line feed (LF) control codes received by the printer control paper movement. Each line feed code received causes the paper to be advanced one line. The printer has a special line feed buffer, separate from the holding buffer, which can store up to 255 line feed commands. LF control codes are received at the same data transfer rate as character data (up to 9300 characters per second). The initial LF code causes an immediate advance of one line. Additional line feed codes received are stored as a count in the line feed buffer. Line feed codes and character data sent to the priinter may be intermixed, however, all line feeds received are performed before printing the next lin

  • Centronics 730-1, POWER ON SWITCH 5V LINE BUSY LINE ON OFF +5V OV +5V OV ACKNLG 20MS H -30MS- 200MS -30MS- WVWWA indeterm.nate W/M////M COND.T.ON 1ST ACKNLG PULSE (PRINTER ON LINE) Figure 10. ACKNOWLEDGE TIMING ON POWER-UP The Power ON/OFF switch controls the application of primary power to the printer. When power is turned on, an LED visible through the paper exit slot indicates that the +5 volts is active. The RESET ON/OFF switch controls the printer modes of operation. When placed in the ON position, the printer is placed in a local mode of operation, a BUSY signal is sent to the host device, the printer electronics are reset, and the print buffer is cleared. When placed in the OFF posit

  • Centronics 730-1, ! t * X & 1 ( ) X + t - / 1 2 3 4 5 6 7 8 9 • * t s > ? A B C D E F G H I J K L M N P Q R S T U U W X Y Z C \ 3 t f * 3 b c d e f G h i J k 1 m n u NORMAL CHARACTERS 1 II * iu % ^ i < > >K .+. * — / o :l 22 3 *+ l^* A ^ Q <? A r ..•* -:: .!•• *? (>? A Kit C i:> e: F - \j» I--I x U K i... M N CD R a R 3 *r U V W X V if: i:: \ ::i t> <-• ^ Hi fc> en- cl frek •r C3 hl :i. *.j K X ITl r*i CD ys> c:* T* <» •b i..I v Ul *•* *rf 'J3Z •<: 1 > •* tt ELONGATED CHARACTERS Figure 8. 730-1 PRINTER CHARACTER STYLES -14-

  • Centronics 730-1, RIBBON INSTALLATION Zip-Pack ribbons are used with the printer. The procedure for installing the ribbon is as follows: 1. Remove printer top cover to gain access to ribbon tray. NOTE Use the throwaway plastic gloves provided with the new ribbon when performing the following steps. 2. Retract the head by rotating the head-release lever fully counterclockwise. 3. Refer to Figure 4 and push the driven roller away from the drive roller and unthread the old ribbon and discard it. 4. Remove the Zip-Pack from the plastic bag. 5. Place Zip-Pack in printer tray as shown in Figure 5. 6. Pull ribbon out from both ends of Zip-Pack and thread according to ribbon threading diagram, being careful to pos

  • Centronics 730-1, PRINTER INTERFACE PRINTER INTERFACE CONNECTIONS Printer Interface Connector A 40-pin printed circuit edge card connector located at the left rear of the printer provides the means for connecting the printer to an input device. A mating connector for preparing a customer supplied interface cable may be procured from Centronics (Part No. 31230032). Two alternate sources of mating connectors are 3M (Part No. 3464-0001) and T&B Ansley (Part No. 609-4015M.) The physical and electrical characteristics, pin orientation,

  • Centronics 730-1, HOST-GENERATED CONTROL CODES Control code data is sent to the printer along with character code data via the input data lines. Control codes are sent as data, but are interpreted as instructions by the printer. The following is a summary of the control codes and control code sequences recognized by the printer. Each of the control codes is described in detail in the following paragraphs. Mnemonic Decimal Octal Code Hex Code LF 10 012 0A CR 13 015 0D ESC SO 27,14 033,016 1B,0E ESC, SI 27,15 033,017 1B,0F Line Feed (LF) Code Function Full Line Feed Forward Print Command Start Elongated Characters Stop Elongated Characters Each line feed (LF) code received by the printe

  • Centronics 730-1, 00822 RIBBON DRIVE ROLLER KNOB RESISTOR R34 REMOVE TO DISABLE ^UTO LINE FEED ON CARRIAGE RETURN RIBBON DRIVE MOTOR CABLE CONNECTOR TRANSFORMER Tl BODY COVER BASE COVER HIGH VOLTAGE SHIELD FUSE Fl, 1A SLOW BLOW .25D x 1.25L Figure 14. DISASSEMBLY OF PRINTER COVER ASSEMBLIES -25-

  • TROUBLESHOOTING CHART (cont'd) TROUBLE PROBABLE CAUSE REMEDY Ribbon does not feed properly. Printer completely inoperative. Ribbon twisted or im- properly loaded. Ribbon drive rollers not engaged properly. AC input plug not connected. Paper jam. Fuse F1 blown. Check ribbon threading and correct as required. Open and release driven roller. Rotate driven ro

  • Centronics 730-1, Figure 9 shows the printer interface timing. Each set of data bits (1-8) sent to the printer is strobed by the DATA STROBE signal sent to the p rinte r by the host device. Within 50 nsec following the trailing edge of the DATA STROBE signal a BUSY signal is generated by the printer which is sent to the host device. The BUSY signal informs the host device that the printer is processing the input data and that no additional data from the host device will be accepted by the p rinter. After completion of processing the input data an acknowledge (ACK) signal is sent to the host device indicating that the data sent by the host devi

  • Centronics 730-1, US ASCII CODE CHART Figure 13 is a US ASCII code chart which shows the standard 96 US ASCII characters which may be printed by the 730-1 printer, the codes for the various characters, and the control codes recognized by the printer. ^7 h ~T^ °o °°i % \ 'o \ 'io \ k\ >>4 "3 t b 2 t *»1 t >v \Column Row^s. 1 2 3 4 5 6 7 NUL DLE SP @ P 4> P 1 1 SOH DC1 ! 1 A Q a q 1 2 STX DC2 " 2 B R b r 1 1 3 ETX DC3 # 3 C S c s 1 4 EOT DC4 $ 4 D T d t 1 1 5 ENQ NAK % 5 E U c u 1 1 6 ACK SYN & 6 F V f V 1 1 1 7 BEL ETB ' 7 G w g w 1 8 BS CAN ( 8 H X h X Indicates 1 1 9 HT

  • Centronics 730-1, PRINCIPLES OF OPERATION All logic, control, drive, and power supply circuits are contained on one printed circuit board within the printer (Figure 10). The print head is mounted on a carriage assembly driven by a DC motor. Printing is performed in the forward direction only (left to right), printing up to seven dots per column. The paper drive roller is driven by a line feed solenoid which advances paper one line (1/6 inch) each time the line feed solenoid is actuated. The ribbon drive motor (AC) moves ribbon past the print head at all times except when the carriage assembly actuates the sensor at the leftmost carriage posit

  • Centronics 730-1, 00821 RED LED (Visible through paper exit slot. Indicates power is ON ~+5 volts.] RESET ON/OFF SWITCH POWER SWITCH FRONT REMOVABLE TOP COVER (Provides access to change ribbon and load paper.) POWER CORD PARALLEL INPUT CONNECTOR (40 pin edge connector) PINCH ROLLER RELEASE LEVER (Used to load paper.) REAR Figure 6» OPERATOR CONTROLS

  • SETTING UP INSPECTION Visually inspect the printer for signs of damage received during shipment. Notify the common carrier immediately of any discrepancies. NOTE Any attempt to operate a damaged printer voids the warranty and may cause further damage. QUICK SET-UP PROCEDURES 1. Install roll paper holder and roll paper, fanfold paper, or single-sheet paper. 2. R

  • FUSE REPLACEMENT Fuse F1 is located on the forward right-hand corner of the logic P.C. board adjacent to the power transformer and POWER ON/OFF switch. Refer to Figure 14 and proceed as follows: 1. Disassemble cover assemblies to gain access to logic P.C. board mounted on the base cover. (See procedure for disassembly of cover assemblies.) 2. Loosen screw, located on right side of transformer

  • Centronics 730-1, Fanfold Paper 1. Remove the top cover, retract head and make sure release lever is in down position (open). 2. Engage paper onto pins of paper-drive roller at bottom rear of printer. 3. Hold paper in place while turning either thumbwheel until the paper exits through the top of the printer. 4. Be sure the paper supply is feeding properly. 5. Check ribbon position, remove slack if necessary; move head-release lever to appropriate print position and install top cover. Print position numbers on print head assembly indicate head release lever positions for number of plies of paper as a general rule. Note that the print-he

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