CITIZEN Service Manual Model : CBM-270 Line Thermal Printer Rev. 1.00 Newly issued on 05. Jan. 1999 Japan CBM Cor poration Infor mation Systems Div.
CBM-270 Service Manual INTRODU ODUCTION This manual describes the disassembly, reassembly, and maintenance procedures of the Line Thermal Printer CBM-270. It is intended for field maintenance men. FEATURES This small line thermal printer is designed for various types of data communication terminals and measuring instrument terminals. Its abundant built-in features allow you to widely use this printer for different applications. Prior to using it, read and understand this manual thoroughly.
CBM-270 Service Manual CONTENTS 1. HANDLING AND MAINTENANCE OF PRINTER ..........................................................................4 2. SPECIFICATIONS .............................................................................................................................5 2.1 Basic Specifications ................................................................................................................................... 5 2.2 Paper Specifications (Recommended Paper)................
CBM-270 Service Manual 1. HANDLING AND MAINTENANCE OF PR PRINTER See "Unpacking" and "OPERATION" in the User's Manual accompanying the printer body.
CBM-270 Service Manual 2. SPECIFICATIONS 2.
CBM-270 Service Manual 2.2 Paper Specifications 2.2.
CBM-270 Service Manual 3. DISASSE SSEMBLY AND REASSE SSEMBLY In case of maintenance work, observe the following: CAUTION (1) If the printer functions properly, do not disassemble, reassemble, or adjust it. Particularly, do not loosen each setscrew unless required. (2) After inspecting the printer, be sure to confirm that it is free from error. (3) Never try to print without setting the printing paper in the printer. Confirm that it is properly set.
CBM-270 Service Manual 2. Removing the Screws from the Bottom of the Main Body (1) Turn over the printer body. (2) Remove two M3 ´ 10 (BT) screws. Then, turn back the printer body to its original position. Do this, holding its upper and bottom covers. 3. Detaching the Printer Cover and Paper Roll (1) Detach the printer cover. Put a finger, etc. on a convexed part from the rear of the printer body and lift. (2) Detach the paper roll.
CBM-270 Service Manual 4. Detaching the Platen Roller Unit (1) Raise the head-up lever. (2) Unlock the platen roller unit. Pull up the blue levers on both sides of the platen roller unit, while opening them outside. (3) Detach the platen roller unit. Hold the blue levers on both sides of pull up. Keep the platen unit carefully so as not to damage it. (4) Lower the head-up lever. 5. Detaching the Upper Cover (1) Lift the upper cover from the rear of the printer body. When this is done, lift it gently.
CBM-270 Service Manual 6. Detaching the NPE Sensor Unit (1) Remove one M3 ´ 10 (BT) screw used to secure the NPE sensor unit. (2) Pull out a cable. 7. Detaching the Operation Panel Board (1) Remove two M2.6 ´ 8 (BT) screws. Turn over the upper cover and unscrew the operation panel board. (2) Detach the operation panel board. 8. Detaching the Printer Mechanism (1) Remove four M2.6 ´ 8 (BT) screws used to secure the printer mechanism. Remove two screws each from the front and back.
CBM-270 Service Manual 9. Detaching the Control Board (1) Remove one M3 ´ 8(BT) screw. (2) Turn on the Power switch. (3) Detach the board. Slightly opening outside the plastic part near the Power switch, slide it upward to the near side of the printer body to detach. 10. Detaching the shielding plate. * For Steps 5 to 9, carry out only those required for maintenance.
CBM-270 Service Manual 3.2 Reassembly Procedure Reassemble the disassembled parts in the reverse order of the disassembly procedure described in 3.1. CAUTION: 1. Route the cables very carefully so that they will not be caught. ·The flat cable should be located on the board side. ·Take care that the NPE sensor will not be cabled above the DIP switch. 2. Tighten the screws firmly, but avoid tightening them too hard. 3. Use only the attached screws. There are several kinds of screws used.
CBM-270 Service Manual 4. TROUBLESHOOTING 4.1 Troubleshoot ooting Procedure If the printer has a trouble, confirm its phenomenon, determine a defective part according to 4.2 Troubleshooting Guide, and then, repair it in the specified manner. · Phenomenon Find a corresponding trouble phenomenon in this column. If there multiple corresponding phenomena, confirm taking all of them into account. This allows you to determine a hidden defective part.
CBM-270 Service Manual · Power Supply Failure Phenomenon Cause Check Method The power cannot be The AC adapter is not --turned on.(POWER connected. lamp not illuminated) The fuse is gone. Check whether or not the non-specified power supply was used in the past. Check whether or not the specified fuse is used. Check whether or not Others the specified power supply is used. Check whether or not the cable or connector of the operation panel board is connected.
CBM-270 Service Manual · Printing Failure Phenomenon No printing Cause Faulty power supply Faulty mounting and connection of printer mechanism The printer operates properly except not printing. Thin printing color Check Method Check whether or not the specified AC adapter is used. Check mounting and connection of the printer mechanism. Check whether or not the specified paper is used, and whether or not the specified paper is set inside out.
CBM-270 Service Manual Phenomenon Too much ink blot Blurred characters Cause Faulty power supply Check Method Repair Method Check whether or not Use the specified the specified AC adapter AC adapter. is used. Foreign substance Check the thermal adhered to the thermal head and platen roller head or platen roller for any adhered foreign substance. Faulty printing paper Check whether or not the specified printing paper is used. Worn platen roller The platen roller is worn out and slips easily.
CBM-270 Service Manual · PNE Sensor Failure Phenomenon Cause PNE is always Faulty sensor detected. Check Method Use a tester to check whether or not a supply voltage and signal are normal. PNE is detected even Irregularity between Check whether or not if there is enough the sensor and printing the printing paper is paper. paper aligned with the core, and whether or not it is set properly in the holder. Foreign substance Check for any foreign caught by the sensor substance. PNE is not detected.
CBM-270 Service Manual · Label Sensor Failure (Only When the Printer Acco ccommo mmodates the Labels) Phenomenon A label is not detected. Cause Check Method Not set for the label Check whether or not printer the DIP switch has been set for the label printer Non-specified label --paper used Faulty sensor --- Repair Method Set the DIP switch for the label printer. Use the recommended label paper. Replace sensor.
CBM-270 Service Manual 5. SERVICE PARTS LIST 5.1 Parts List for Me Mechanism Ref.No. Parts No.
CBM-270 Service Manual 5.
CBM-270 Service Manual 5.2.1 Drawing for Operation Panel PCB Symbol SW LED1 LED2 LED3 Part Name SKHHAN SEL2410E SEL2110S SEL2110S A: Brown B: Red C: Orange D: Yellow E: Green F: Blue Maker ALPS SANKEN SANKEN SANKEN Material Paper Phenol Single-sided Board 1.6 Thick UL Certified No Silk (Symbols, Board Name, Etc.
CBM-270 Service Manual 5.3 Parts List for Control Board Ref. No. R IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC1 IC2 IC3 IC4 IC5 IC6 (IC4) Parts No.
CBM-270 Service Manual 2/2 Ref. No. R P Parts No.
CBM-270 Service Manual 5.4 Parts Layout Drawing 5.4.
CBM-270 Service Manual 5.4.
CBM-270 Service Manual 5.4.
CBM-270 Service Manual 5.4.
ROM RAM Kanji ROM Operation Panel 6. DRAWING Domestic Use Only 6.1 Block Diagram OSC 16.0MHz Paper Near End I/F *1 G/A CPU Interface 28 DIP Switch Label Detection Sensor Paper end Head-up With Label Function Only DC 7.2 V Print Head Driver DC 5 V Stepping Motor DC 7.
CBM-270 Service Manual 6.2 Circuit Diagram 6.2.
CBM-270 Service Manual 6.2.
CBM-270 Service Manual 7.
CBM-270 Service Manual WALL MOUNT UNTING HOLES LAYOUT DRAWING 32 CITIZEN
