Page 1: ......
Page 2: ...ENTATION OR WARRANTIES OF ANY KIND WHATSOEVER WITH RESPECT TO THE CONTENTS HEREOF AND SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE Qume Corpor...
Page 3: ...service the QVT 101 PLUS Terminals by quickly isolating a fault to the assembly level and taking corrective action in a minimum amount Of time It is assumed that all service personnel who may use thi...
Page 4: ...video alignment after replacing a subassembly Section 4 Parts information for identification of replaceable parts and recommended spare parts Section 5 Circuits and Diagrams reference material Append...
Page 5: ...Removing and Replacing the Transformer LOWER MONITOR ASSEMBLy Removing and Replacing the Bottom Cover Removing and Replacing the Logic Board Removing and Replacing the RAM Back Up Battery Removing and...
Page 6: ...ng the Ground Wire and Spring Removing the Green LED ON Off Light Replacing the Transformer Removal of the Rear Connector Cables and Bottom Cover Removal of the Logic Board Removal of the Keyboard Con...
Page 7: ...face RS 232 C DTE Connector J8 1 3 1 3 Power Troubleshooting 1 4 1 4 Logic Board Troubleshooting 1 5 1 5 Keyboard Troubleshooting 1 6 4 1 Recommended Spare Parts 4 1 4 1 QVT 101 PLUS Replaceable Parts...
Page 8: ...aking good contact Is there a compatibility problem between the terminal and the host TROUBLESHOOTING FLOWCHARTS When using the following troubleshooting flowcharts always begin with Fault Isolation F...
Page 9: ...information for troubleshooting power logic PCB and keyboard malfunctions POWER CORD CONNECTION AUX CONNECTOR EIA CONNECTOR PRINTER HOST COMPUTER Figure 1 1 QVT I01 PLUS Rear Connector Panel Table 1...
Page 10: ...in Numher 1 2 3 4 5 6 7 8 12 13 20 24 25 Description Chassis Ground Transmit Data Receive Data Request to Send Clear to Send Data Set Ready Signal Ground Data Carrier Detect Signal Direction From Term...
Page 11: ...1 Defective Video Power Supply PCB Assembly 2 Defective CRT Brightness control assy problem Replace fuse with one of proper rating Perform continuity check on the Power Switch and the Filter Assy If...
Page 12: ...oose interconnect cables 4 Defective Video Power Supply PCB Assembly REMEDY Replace RAM back up battery on logic PCB Refer to Section 2 Removing and Replacing RAM Back Up Battery Replace logic PCR Ref...
Page 13: ...bly 3 Defective microprocessor 4 Defective keyboard Perform continuity check Replace cable if defective Refer to Section 2 Replacing the Keyboard Coiled Cable Perform continuity check Refer to Section...
Page 14: ...to Flowchart 12 YES Exit self test press Shift Break then Clear while in Local mode Press each key on keyboard Are characters displayed as keys are pressed NO Proceed to Flowchart 13 YES Exit Local mo...
Page 15: ...chart 1 YES Verify operation of ON OFF switch Is switch defective NO Proceed to Transformer Measurement YES Replace Power Switch Fuse Filter Assembly refer to Section 2 Continue Does fuse fail again a...
Page 16: ...er Supply Co trol PCB I Replace fuse and Power On the terminal I Does fuse fail again NO Power Supply Control PCB is OK Video Power Supply PCB Assembly is defective Remove and replace the Video Power...
Page 17: ...en pin 1 Sig GNO and pin 2 5 VOC on the Keyboard PCB P1 YES NO Perform continuity check on coiled keyboard cable If defective replace keyboard cable refer to Section 2 Is the correct character display...
Page 18: ...W then full CWo Observe a 3VDC voltage change between pins 13 and 14 of P1 Logic PCB 22 pin connector Does voltage change approx 3VDC NO Brightness control is defective Replace Brightness control refe...
Page 19: ...Supply PCB Assembly Replace YES With brightness control full CW check Video P6 Pin 7 for approximately 400 mVac RMS Is approx 400 mVac RMS present NO Defective Video Power Supply PCB Assembly Replace...
Page 20: ...VAC RMS G2 0154 G4 H 550 VOC Cathode 45 VOC 175 VOC 12 VOC YES CRT defective Replace CRT refer to Section 2 SELF DIAGNOSTICS Each time the terminal is powered on the terminal automatically performs a...
Page 21: ...e the following precautions Unless otherwise instructed by procedures in this manual always turn the terminal power off and disconnect it from the power source Unplug the power cord from its power sou...
Page 22: ...subassemblies refer to Figure 2 1 Back Cover Power Supply Control PCB Bezel Video Power Supply PCB CRT and Yoke subassembly Transformer CRT AND YOKE ASSEMBLY POWER SUPPLY CONTROL PCB VIDEO POWER SUPPL...
Page 23: ...location of all screws washers and other parts that are removed from the terminal and save them these parts wi 11 be needed to reassemble the termi na1 To remove the Back Cover proceed as follows 1 Re...
Page 24: ...r or at the flyback transformer To prevent electrical shock always discharge the CRT by connect i ng its anode contact to ground before doi ng any work in the monitor area refer to the CRT discharging...
Page 25: ...up from the CRT glass with time the plastic tends to stick to the glass While holding the flange folded upwards between thumb and index finger push against one side of the anode cap near its base as s...
Page 26: ...the yoke of the CRT 6 Remove the four screws that hold the Video Power Supply PCB onto the chassis refer to Figure 2 5 Slide the PCB back a few inches to facilitate the removal of the connectors 7 Rem...
Page 27: ...REPLACEMENT VIDEO POWER SUPPLY PCB SCREWS 4 PLACES CHASSIS GROUND P5 AND P6 NOT VISIBLE P1 AND P2 NOT VISIBLE 2 SCREWS CRT SOCKET ASSEMBLY Figure 2 5 Removal of the Video Power Supply PCB and the Powe...
Page 28: ...3 After removing the Video Power Supply PCB Assembly remove the four small nuts and the four washers that secure the Bezel and CRT Yoke Assembly to the panel supports and main chassis refer to Figure...
Page 29: ...ne on each corner of the CRT as shown in Figure 2 7 Remove the four larger nuts and washers from the CRT tabs use a 5 16 inch nut driver MAIN CHASSIS RETAINING WASHERS EACH CORNER CRT AND YOKE ASSEMBL...
Page 30: ...nd panel supports Place the CRT screen down on a soft surface such as a towel See Fi gure 2 8 6 Remove the ground wire and spring from the 2 corners of the CRT refer to Ftgure 2 8 CRTANO YOKE ASSEMBLY...
Page 31: ...new CRT and Yoke assembly as shown in Figure 2 9 REPLACEMENT To replace the CRT and Yoke Assembly repeat the removal instructions in reverse order Note correct orientation of the ground wire as shown...
Page 32: ...s described in the paragraph below REPLACEMENT To replace the front Bezel repeat removal instructions in reverse order If necessary refer to Figure 4 1 to verify the correct location of all parts Remo...
Page 33: ...e Transformer to the tilt neck assembly 4 Disconnect the ground strap and the plastic connector black and white wires to the Power Switch Fuse Filter Assembly 5 0 sconnect P3 Red and B1 ack wi res tha...
Page 34: ...e the rear connector panel 2 screws and slide out the Logic Board refer to Figure 2 13 4 Remove the ei ght screws ho1di ng the bottom cover to the lower cabi net top Note that the center 4 screws are...
Page 35: ...nd remove the rear connector panel refer to Figure 2 13 2 Insert needle nose pliers into the two small holes in the center of the plate as shown in Figure 2 13 3 Using the needle nose pliers slide out...
Page 36: ...SEMBLY REMOVAL AND REPLACEMENT SCREWS 2 PLACES oc _ 2 HOLES FOR PLIERS REAR CONNECTOR PANEL Figure 2 13 Removal of the logic Board ESD PLATE KEYBOARD CONNECTOR ASSEMBLY Figure 2 14 Removal of the keyb...
Page 37: ...area of the Power Switch Fuse Filter Assembly Before performing any service in this area power OFF the terminal and disconnect the power cord 1 Gain access to the lower monitor area by removing the Bo...
Page 38: ...SWITCHI FUSE FILTER ASSEMBLY BRIGHTNESS CONTROL ASSEMBLY LOGIC BOARD EDGE CONNECTOR LOGIC PCB GUIDE RAIL 2 PLACES EMI SHEILD 2 SCREWS Figure 2 16 Removing and Replacing the Brightness Control Assembl...
Page 39: ...ers and washers that secure the assembly to the Lower Monitor Assembly see Figure 2 16 4 Pull the Jnit away from the Lower Monitor Assembly The black and white wi res are common to the transformer ref...
Page 40: ...his manual 2 Remove the Keyboard Connector Assembly jack and jack ESD plate from the Bottom Cover refer to Figure 2 14 3 Disconnect the 4 wires Pins 1 2 3 4 from the Logic Board Edge Connector 22 posi...
Page 41: ...se any of the 16 function keys when the keyboard s turned upside down 3 Remove the four screws two on each side from the keyboard metal plate Lift the the Keyboard PCB Assembly away from the bottom co...
Page 42: ...the keyboard coi l d cable from connector PIon the Keyboard PCB and remove the cable from its retainer on the inside of the bottom cover Be careful not to damage the cable by crimping or over stressin...
Page 43: ...inserted into the gap between keycap sides 2 Lower the keycap tool unti 1 it rests against the keyboard metal plate below the keys and its prongs clear the underside of the keycap step A 3 While hold...
Page 44: ...REPLACEMENT REPLACEMENT To replace a keyboard keycap place the new keycap directly over the socket as shown in Figure 2 20 and push gently into place until the key is firmly held Figure 2 20 Replacem...
Page 45: ...er Position TOOLS AND EQUIPMENT REQUIRED The following tools are required to perform video alignment of the QVT 101 PLUS terminal Phillips screwdriver No 2 Multimeter for brightness alignment procedur...
Page 46: ...ase H s To display the full H test pattern enter Setup Mode and press Figure 3 1 shows a typical H Pattern 25 lines 80 columns with display dimensions Figure 3 2 shows the 1ocati on of ali gnment comp...
Page 47: ..._ _ _ _ _ __ _ ALIGNMENT t T 16 0mm 5mm 1 _ 233mm 6mm I 5mm I 13 0mm 6mm Figure 3 1 The H Test Pattern 3 3...
Page 48: ...gure 3 2 Each alignment procedure is described below CENTERING RINGS G1 NOT VISIBLE VR151 olIlI l VR502 L103 VR501 LEGEND VR501 Vertical Display Height VR502Vertical Linearity VRlSI Brightness VR152 F...
Page 49: ...reading is taken at a 90 degree angle to the screen straight on 2b Using a Metric Ruler The distance between the inner edge of the front bezel and the outer edge of the fi rst 1 ast character H can b...
Page 50: ...reading is taken at a 90 degree angle to the screen straight on 2b Using a Metric Ruler The distance between the inner edge of the front bezel and the top edge of the first line of H characters may b...
Page 51: ...2 and with a small non metallic flat blade screwdriver adjust VR152 for optimum focus at the center of the display Optimum focus occurs when the individual dots that form a character are well defined...
Page 52: ...adjust the display centering A flexible metric ruler with ac curate divisons may be used in place of the paper scale When measuring the display position of the test pattern be careful to minimize par...
Page 53: ...lts 5mm 10 50 302250 03 Video PCB Assembly 20 100 302053 01 Brightness Control Assembly w wiring 10 30 302037 01 CRT Yoke Assembly Green 14 CRT 5 20 302037 02 CRT Yoke Assembly Amber 14 CRT 5 20 30204...
Page 54: ...VI I ex cr M I...
Page 55: ...I I 0i l A t I C l1 a SM U A l I t n 10 X I i...
Page 56: ...Vl L f0 e Cl cr 0 J III l Cl L 0 L 0 0 g O lI N I Cl L e j I XS XOIYX6 dl I I...
Page 57: ...V1 X 0 M I CII L SJJS XS IT SJd9 XS SJdl WXS U Y XS XI 1...
Page 58: ...MS 10 302095 01 Qume LOGO PLUS 11 302096 01 Rating NP QVT 101 PLUS 120V 11 302096 02 Rating NP QVT 101 PLUS 230V 14 10007 Ground Spri ng 21 Replaced by 16x 22 302103 01 Chassis Assembly 23 302104 01 C...
Page 59: ...10053 Screw M3XO 5X6 46 391210 200 QVT 101 PLUS Logic BD W Firmware 47 302119 01 Lower Cabinet Top Cover PLUS C 48 302120 01 Power Knob LT GRN 49 302087 01 Brightness Knob Lt Rlue 50 302122 01 Switch...
Page 60: ...01163 01 A C Switch 115V 70 301501 01 A C Switch 230V VDE 71 301160 01 Line Filter 72 302138 01 PCB Guide L 73 302139 01 PCB Guide R 77 302143 01 Rubber Foot 78 302144 01 Rear Panel PCB Cover 80 30185...
Page 61: ...PLUS Lower Cabinet Bottom Cover Assy 6X 302056 01 Keyboard Connector Assy 7X 302055 01 Speaker Assy PLUS Products 8X 302053 01 Brightness Control Assy PLUS products 9X 302054 01 Power Switch Fuse Filt...
Page 62: ...185 01 10244 301814 01 302187 01 302188 01 302190 01 302192 01 302193 01 DESCRIPTION Key Housing Space Bar Guide Space Bar Wi re Axle Bar Axle Spring A Axle Spring B Adj Foot A Gray Adj Foot B Gray Ax...
Page 63: ...1 Washer EX M4XD8 5XTO 45 191 301959 01 Guide Bushing Keyboard 196 302241 01 Function Key Cap 197 302256 01 Oust Mask Function Keycap IX 302235 01 101 PLUS Strip Holder Cover Assy 2X 302236 01 STD Key...
Page 64: ...PLUS Functional Block Diagram 5 3 QVT 101 PLUS Overall Interconnect Diagram 5 5 QVT 101 PLUS Video Power Supply Control PCB Schematic 5 7 QVT 101 PLUS Video Power Supply PCB Schematic 5 9 QVT 101 PLU...
Page 65: ...nal Block Diagram I I I I I I I I I I I I I I I _J Figure 5 1 I I i i I PERIPHERAL LIN OfUVERSI RECEIVERS AUX PORT l I MICR PROCESSOR U20 oGiCPC8 DATA I I I J I I I I I I I I I I L _ ItEYBOARD MATRIX...
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Page 80: ...figured in the Passive mode To change the Current Loop PCB from the Passi ve mode to the Acti ve mode follow the instructions outlined in Table A I To configure the RS 232 cable for current loop opera...
Page 81: ...Remove the power cord and all cables from the rear of the terminal 3 Remove the Logic board in accordance with Removing and Replacing the Logic board procedures in Section 2 of this manual 4 See Figu...
Page 82: ...o d f CURRENT LOOP OR RS 422 PCB INSTAL LATION LOCATION o Figure A I Installation of Current Loop or RS 422 PCB APPENDIX A r 5 to A 3...
