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Sharp SF-2214 Service Manual Download Page 58

9-4. Transport roller clutch 

1

Remove the rear cabinet. 

2

Remove the transport clutch as shown in the figure below.

9-5. Paper exit sensor

1

Open the front panel. 

2

Move the open/close lever to the right and open the upper unit
slowly.

3

Remove the sensor as shown in the figure below. 

6 – 19

Summary of Contents for SF-2214

Page 1: ...H SECTION 5 1 6 DISASSEMBLY AND ASSEMBLY 6 1 7 ADJUSTMENTS 7 1 8 SIMULATIONS 8 1 9 SELF DIAGNOSTICS 9 1 10 SERVICE AT MEMORY TROUBLE AND 10 MAIN CONTROL PWB REPLACEMENT 10 1 11 MAINTENANCE 11 1 12 ELECTRICAL SECTION 12 1 SHARP CORPORATION CONTENTS This document has been published to be used for after sales service only The contents are subject to change without notice Parts marked with is importan...

Page 2: ...ive shaft 5 4 8 Lens drive wire 5 4 9 No 4 5 mirror base 5 4 10 Mirror motor 5 4 11 Mirror home position sensor MHPS 5 4 12 No 2 3 mirror base 5 4 13 Copy lamp unit 5 4 14 Thermal fuse 5 4 15 Reflector 5 4 16 Exposure adjustment plates 5 4 17 Mirror base drive wire 5 4 18 Lens drive motor 5 4 19 AE sensor 5 4 5 2 Basic operations 5 4 6 Copy process 5 6 1 Photoconductor 5 6 2 Process diagram 5 6 3 ...

Page 3: ...o copy mode Non toner save mode copy density adjustment 7 25 E Auto copy mode Non toner save mode copy density adjustment 7 25 F Auto copy mode Toner save mode copy density adjustment 7 26 6 Copy density adjustment table 7 27 4 Others 7 28 1 Transfer charger wire installation 7 28 2 DV bias adjustment 7 28 3 Separation charger output adjustment 7 28 8 SIMULATIONS 8 1 1 Outline 8 1 2 Purpose 8 1 3 ...

Page 4: ...e has passed since a copy run has finished the pwer save function operates to save energy There are two kinds of power save function as shown below The preferred power save mode can be selected by the key operator 1 Pre heat The temperature in the fuser section is lower than that in the ready state Within 10 sec after completion of pre heating the machine returns to the ready state 2 Auto power sh...

Page 5: ...1 2 ...

Page 6: ...mode Auto Manual Photo Manual steps 9 steps 10 Void width Normal Enlargement Reduction Void area Lead edge 3 0mm or less Lead edge 3 0mm or less Lead edge 3 0mm or less Image loss Lead edge 3 0mm or less Lead edge 2 5mm or less Lead edge 5 0mm or less 11 Paper exit Paper exit tray capacity 100 sheets 12 External demensions SF 2014 SF 2114 SF 2214 W D H mm 500 480 295 500 480 364 Occupying width mm...

Page 7: ...ner save 8 04 660V 10V Charge Transfer charger applied voltage 50 0µA 4µA 4 Developer section Developing system Novel two component developing system Developer replacement not required Toner density detection system Magnetic sensor system Toner box capacity Developer 48g toner 180g Developing bias DC 200V 3V Developer Material Iron powder carrier Charging system Negatively charged by friction Tone...

Page 8: ...er x 1 80K SF 214HR 5 Upper Separation Pawl x 3 Lower Heat Roller x 1 Lower Separation Pawl x 3 Except for Saudi Arabia Asia Central and South America No Item Contents Life Model name Packing unit 1 OPC Drum Cartridge OPC Drum Cartridge x 1 40K SF 214DR 10 2 OPC Drum Kit OPC Drum x 1 40K SF 214DK1 10 Cleaner Blade x 1 3 Black Toner Black Toner Cartridge x 1 4K SF 214ST1 10 4 Black Developer Black ...

Page 9: ...ROL RESISTOR R102 CURA SF DR14 7mm 7mm SCREW 1 CPWBF1051FC51 82K CRUB SN 142DR 7mm 7mm LOCK RIB CPWBF1051FC52 36K CRUC ZT 80DR 7mm 7mm LOCK RIB CPWBF1051FC53 24K SRUA SF 214DR SF 214DK1 9mm 9mm SCREW 2 CPWBF1051FC51 82K SRUB SF 214DM SF 214DK2 8mm 8mm SCREW 2 CPWBF1051FC51 82K SF 214DH SF 214DK3 1 2 Hardware Is common but setting condition is different of the T C 26 6 COMPATIBILITY TABLE OF TONER ...

Page 10: ...cover 5 Original guide 6 Document table 7 Manual bypass guide 8 Manual bypass 9 Operation panel F Paper tray G Front cover H Release button I Power switch J Toner cartridge release lever K Handel L Toner cartridge M Open close lever N Photoconductive drum O Fusing unit High temperature P Fusing unit lever 1 2 3 4 5 6 9 10 11 12 13 20 19 17 18 16 15 14 Upper unit Lower unit 7 8 3 1 ...

Page 11: ... L Clear key M Print button and ready indicator N Power save indicator O SPF misfeed indicator P SPF indicator 2 1 3 4 5 SF 2014 SF 2114 SF 2214 3 2 1 4 5 6 7 8 9 0 C 1 2 3 4 5 11 6 7 8 14 15 16 17 18 POWER SAVE AUTO MANUAL PHOTO EXPOSURE TRAY SELECT 1 2 1 2 3 4 5 19 4 20 3 5 10 11 12 6 7 8 9 13 1 2 3 4 5 C 6 7 8 9 0 14 15 16 17 18 1 2 1 2 3 4 5 4 3 5 129 117 100 78 64 10 11 12 6 7 8 9 13 1 2 3 4 ...

Page 12: ...ed roller U Manual feed take up roller V Manual paper feed follower roller W Tray paper feed takeup roller X Tray transport follower roller Y Transport roller Upper Z Tray paper feed roller Tray paper feed reverse roller Option tray transport follower roller Option tray transport roller Option tray paper feed reverse roller _ Option tray paper feed roller Option tray paper feed takeup roller a Res...

Page 13: ...HPD Lens home position sensor Transmission photo sensor H at the home position 8 PWD Paper size large small sensor Transmission photo sensor L with the large size 9 PPD Paper transport sensor Transmission photo sensor L when paper is sensed F CPED1 Tray paper empty sensor Transmission photo sensor H when paper is present G CPED2 Option tray paper empty sensor Transmission photo sensor H when paper...

Page 14: ...paration solenoid For paper separation solenoid drive 4 RRC Resist roller clutch For resist roller rotation 5 TRC Transport roller clutch For transport roller rotation 6 MPFS Manual paper feed solenoid For takeup roller pressing 7 CPFC1 Tray paper feed clutch For paper feed roller rotation 8 CPFC2 Option tray paper feed clutch For paper feed roller rotation 9 SPFM Multi paper feed clutch For multi...

Page 15: ...brushless 3 CFM Cooling fan motor For cooling the optical system DC brushless 4 MM Main motor For the main body drive and the option drive DC brushless 5 LM Lens motor For the optical lens drive DC stepping 6 MRM Mirror motor For the optical mirror base drive DC brushless 7 TM Toner motor For toner supply DC synchronous 8 SPFFM SPF cooling fan motor For cooling the optical system in the SPF mode D...

Page 16: ...ntrol 4 AE PWB Document density auto exposure detection 5 Blank lamp PWB Blank lamp control 6 Lower unit PWB Lower unit parts control 7 High voltage PWB Supply of the process high voltage and the developer bias voltage 8 Operation PWB Operation input display control 9 SPF control PWB SPF control F RE PWB Speed detection for SPF motor 5 6 7 8 3 1 2 4 9 10 3 7 ...

Page 17: ... Warranty card For Austraria 1 Warranty resistration For U K 1 Installation report For Europe except U K 1 15 Consumable parts kit Developer 1 Toner for installation 1 2 Installation Installation conditions The following installing conditions must be satisfied to assure the normal operations of the machine 1 Environment 1 Keep the machine away from direct sunlight and avoid instal lation near a wi...

Page 18: ...unstable surface To assure the proper operations install on a level surface 5 Install in a well ventilated place 6 Avoid installation where there is inflammable gases or ammo nium gases Installation near a diazonium copier may degrade copy quality and cause malfunctions 7 Install near a power outlet 2 Space around the machine Allow a space of about 15 cm 6 inches between the rear side of the machi...

Page 19: ...nit Remove the No 2 No 3 mirror unit fixing screw 1 pc on the left side of the copier 2 Unlock the No 4 No 5 mirror unit In the case of SF 2014 Remove the No 4 No 5 mirror unit fixing screws 2 pcs on the right side of the copier In the case of SF 2114 SF 2214 Open the paper feed tray on the right side of the copier Remove the No 4 No 5 mirror unit fixing screws 2 pcs Then close the paper feed tray...

Page 20: ...ide Check to insure that the developer cartridge is securely locked 4 Supply developer Press and hold the developer cartridge in place and remove the developer cartridge sheet by pulling forcefully Developer will be supplied 4 Toner supply 1 Remove the toner cartridge Slowly turn the toner cartridge clockwise and remove it 2 Shake the toner cartridge Shake the removed toner cartridge up and down a...

Page 21: ... displayed on the MULTI COPY display Range 1 99 Note If the simulation is cancelled during execution the au tomatic reading cannot be performed Do not cancel the simulation during execution c Press the CLEAR key three times to cancel simulation 25 6 Accessory attachment 1 Attach the copy tray 2 Attach the document tray SF 2214 only 4 Locking procedure for transit or repacking In general reverse th...

Page 22: ...cabinet 5 Optional paper feed unit SF CM14 Installation Manual For use with compatible SHARP copies See SHARP copier Installation Manual to determine suitability Included parts SF 2114 2214 only 1 Set the main copier unit on the paper feed unit 1 Lift the main copier unit by the grips place it upon the paper feed unit and slip the positioning holes 3 locations on the bottom of the main copier unit...

Page 23: ...Connect the main copier unit and the paper feed unit 1 Secure mounting screw A 1 pc in the main copier unit 1 loca tion Then gently close the upper unit and front cover 2 Connect the paper feed unit and the main copier unit by securing mounting screw B 2 pcs in the mounting holes 2 locations located in the slot from which the paper tray was removed After these procedures have been completed reload...

Page 24: ... unit The manual bypass unit will come out toward you slighly 2 Pull out upon the manual bypass unit to remove it from the main copier unit 3 Mount the multi bypass feeder unit onto the main copier unit 1 Slide the positioning pins which project from the multi bypass feeder unit in to the grooves in the main copier unit then push the multi bypass feeder unit into place to in stall it At this time ...

Page 25: ...an be added Cassette paper feed operation The cassette paper feed clutch CPFC turns on the paper feed roller shaft the paper feed roller and the takeup roller rotate At the same time the roller release arm is lowered by the limiter spring As a result the takeup roller falls by its own weight to reach the paper surface performing the paper feed operation When the CPCF turns off rotation is stopped ...

Page 26: ...ated carrier is transported to deteriorated carrier collection section in the collection container by mixingroller Therefore quantity of carrier in the developer box is regulated This operation effects on replacement for deteriorated carrier by fresh one 4 On the other hand residual toner in the OPC drum cartridge units is transported to waste toner collection section in the collection container b...

Page 27: ...o 1 mirror 4 No 2 mirror 5 No 3 mirror 6 Lens 7 No 4 mirror 8 No 5 mirror 9 No 6 mirror F No 2 No 3 mirror base unit G Copy lamp unit H No 4 No 5 mirror base unit I Mirror motor J Lens No 4 No 5 mirror base drive motor K Lens home position sensor L Mirror home position sensor M Auto exposure sensor 1 Original table The original table is fixed and originals are set to the left frame side as the ref...

Page 28: ...ror base drive wire This wire is used to transmit the drive power of the mirror motor to the copy lamp unit and the No 2 3 mirror base to scan the mirror base 18 Lens drive motor This is a stepping motor which is used to move the lens and the No 4 5 mirror base 19 AE sensor The original density is detected with the intensity of the copy lamp light reflected from the original The measurement area i...

Page 29: ...copy lamp voltage of 67 7V 135 4V at power ON This value is checked with sim 44 02 The mirror base scan speed mirror motor rpm is changed to zoom Copy paper feed direction The lens and the mirror are moved to zoom The mirror scan speed is changed to zoom Mirror scan speed Drum rotating speed Mirror scan speed Enlargement Original The lens and the mirror are move to zoom Reduction 80 70 60 50 V EX1...

Page 30: ...n Separation Separation corona unit High voltage unit Transfer charger High voltage unit Charging Discharging Cleaning Transfer Drum upper image paper synchronization Development Exposure Exposure Blank lamp Original Copy lamp Mirror lens High voltage unit Toner Developer Resist roller Paper feed roller Transportroller Manual paper feed Paper cassette Image forming process Paper transport path Mai...

Page 31: ...gative charges are neutralized each other in the aluminum layer and on the OPC drum surface As a result the OPC drum surface potential becomes 20V 30V By performing step 1 Charging and step 2 Discharging the pho toconductor itself is initialized to stabilize the drum surface potential Main corona unit Blank lamp Cleaning blade Discharge lamp Seperation pawl Seperation corona unit Transfer corona u...

Page 32: ...nsity to the OPC drum Positive or negative charges are generated in the CGL of the OPC drum where lights are radiated Negative charges generated in the CGL move towards the positive charges in the aluminum layer generated in step 3 While the positive charges in the CGL move towards the negative charges on the CPU drum surface generated in step 3 Therefore positive charges and negative charges are ...

Page 33: ...after exposure Main corona unit Blank lamp Cleaning blade Discharge lamp Seperation pawl Seperation corona unit Transfer corona unit Resist roller MG roller Developer unit CTL CGL OPC drum CTL CGL OPC drum Low intensity in the area corre sponding to the darker density portion of the document Medium intensity in the area corre sponding to the medium density portion of the document HIgh intensity in...

Page 34: ...copy paper potential to the same level as the drum surface potential The attraction be tween the copy paper and the drum is weakened by this allowing separation of the copy paper by its own extending force If the copy paper is not separated by the separation charger it is separated by the separation pawl mechanically Main corona unit Blank lamp Cleaning blade Discharge lamp Seperation pawl Seperat...

Page 35: ...uminum layer while the positive charges in the CGL move towards the residual negative charges on the OPC drum surface Therefore the positive and the negative charges are neutralized in the aluminum layer and on the OPC drum surface removing the residual charges on the OPC drum surface As a result the OPC drum surface potential becomes 20V 30V 4 Transit of photoconductor drum surface potential CGL ...

Page 36: ...py lamp voltage For this model however to reduce the number of service calls the copy lamp voltage is automatically dropped according to the reduction in the photo sensitivity of the photoconductor drum to correct it The drum rotating time from installation of a new photoconductor drum is counted by the timer and the copy lamp voltage is corrected in every mode Refer to Fig 3 The correction is per...

Page 37: ...d after the copy cycle after turning on the power or after the specified time of rotation of the photoconductor drum Correction operation The same operation as the initializing is performed to change the copy lamp voltage until the AE sensor output level reaches the same level as the reference value performing the correction The copy lamp voltage is revised to a new value at every correction and t...

Page 38: ...tion Paper feed Paper transport Synchronization SM rotation SPFS ON SPPD ON SRRC ON Exposure SPOD ON Original exit SPF side PSW MM CPFC1 TRC RRC PPD POD SM SPFS SRRC SPPD SPOD Timing chart The image lead position is adjusted with Sim 50 1 Original takeup roller 2 SPFD 3 SPF PS gate 4 Original paper feed roller 5 Document feed reverse roller 6 SPPD actuator 7 SPF PS roller upper 8 SPF PS roller low...

Page 39: ...5 15 ...

Page 40: ...ower section 1 1 Paper feed unit 1 Open the front cover and open the body Release the right and the left lock levers and pull out the manual paper feed unit 2 Disconnect the CN B connector of the lower PWB remove the paper feed unit fixing screws 4 pcs and lift the paper feed unit to remove 1 2 Paper feed roller ass y removal 1 Disconnect the connector of the magnetic clutch in the rear frame side...

Page 41: ...e Note for assembly 2 Attach the paper feed roller ass y so that the paper feed roller clutch faces the lower frame When attaching the paper feed unit insert it in the base unit hole of the copier 1 3 Separation roller 1 Remove the paper feed unit and remove the separation roller 1 4 Takeup roller paper feed roller 1 Remove the paper feed roller ass y and remove the takeup roller 2 Remove the roll...

Page 42: ...r frame side Remove the spring in the rear frame side Disconnect the CN E connector in the lower frame PWB unit Slide the resist roller ass y to the rear frame side and remove it upwards 3 Remove the clutch and the gear as shown below Note for assembly 1 When assembling attach the positioning pin of the resist roller clutch in the direc tion of paper exit Note for assembly 2 When assembling the re...

Page 43: ...awl from the positioning hole in the paper exit side and slide it in the direction of paper feed to remove 1 8 Lower unit PWB 1 Open the body up and remove the rear lower cabinet 2 Remove the connector the PWB fixing screw 1 pc and the CN F fixing screws 2 pcs Slide the lower unit PWB to the front frame side and remove it upwards 1 9 Cassette paper empty detector CPED1 1 Remove the rear lower cabi...

Page 44: ...es and the bearing Remove the manual roller ass y together with the solenoid holder 3 Remove the manual feed takeup roller from the manual arm 4 Remove the manual arm and the E ring and remove the manual paper feed roller Note Gear 20T has a positioning pin When removing the man ual arm be careful not to miss the positioning pin Note for assembly 1 The manual paper feed roller is provided with the...

Page 45: ...sert a long screwdriver into that port and remove the screw which is fixing the fuser cover 7 Remove the fuser cover in the direction of arrow A 8 Remove an E ring and two connectors 3 2 Heater lamp replacement 1 Remove the fuser cover fixing screw 1 pc and slide it to the front side and remove it 2 While pushing the projection of the Faston terminal connected to the thermostat remove the lead wir...

Page 46: ... unit so that the paper guide is in the lower side The separation pawl is in the upper side 3 Remove the tension spring hold the tip of the separation pawl and remove it from the supporting section and tilt it to remove For assembly reverse the disassembly procedures 3 5 Lower cleaning roller and lower heat roller replacement 1 Remove the fuser unit 2 Remove the CL roller springs 2 pcs which is fi...

Page 47: ...the scraper Note When attaching the scraper be careful not to deform it Also be careful to check that the scraper hook section is completely inserted into the paper exit paper guide 3 7 Thermistor thermostat removal Note for assembly Be sure to bring the thermistor center into contact with the heat roller Clean and remove foreign materials from the thermistor surface with alcohol Paper exit paper ...

Page 48: ...ror base drive wire replacement Removal 1 Remove the manual paper feed unit the right upper cabinet the glass holder the table glass and the operation panel 2 Remove the fixing screws 2 pcs of the left upper cabinet and slide to the rear frame side to remove the cabinet 3 Loosen the fixing screw of the copy lamp unit wire fixing plate and remove the wire from the unit 4 Remove the tension spring 7...

Page 49: ...move the shaft and the carriage unit Installation 1 Pass the lens drive shaft through the carriage unit and set the shaft to the shaft support section of the base plate 2 Fix the shaft mounting plate in the paper feed side 3 Store the lens unit projection in the lens guide rail 4 Set the lens drive wire on the carriage unit 5 Align the No 4 5 mirror zoom cam and the carriage unit to the normal cop...

Page 50: ... drive motor fixing screws 2 pcs and remove the No 4 5 mirror unit from the mounting section square hole in the base plate For assembly reverse the disassembly procedures 4 6 Optical unit removal 1 Remove the drum unit and the developer unit 2 Remove the right cabinet the left cabinet the operation panel the medium cabinet and the rear cabinet 3 Remove three connectors A from the sensors in the re...

Page 51: ...he upper frame and the screw and the connector in the rear frame then remove the main PWB 6 Remove the connector the manual paper feed unit the right upper cabinet the table glass and the dark box cover Remove the fixing screw from the above and remove the AE sensor to wards the front frame side For assembly reverse the disassembly procedures 4 8 Light adjustment plate temperature fuse removal 1 R...

Page 52: ...ove the SPF upper cover 3 Remove two fixing screws of paper exit reverse paper guide 4 Remove the SPF motor ass y fixing screws 4 pcs and the CN C connector 4 pin of the SPF control PWB Then remove the SPF motor ass y Reference The SPF motor can be removed by removing two screws from the SPF motor ass y A 6 13 ...

Page 53: ... the gear and the paper feed roller can be removed 4 Since the takeup roller is of the insertion type remove it from the grip side For assembly reverse the disassembly procedure Note The paper feed roller is provided with the one way clutch Be sure to attach so that the one way clutch is in the front frame side 5 3 Reverse roller ass y replacement 1 For replacement of the reverse roller the SPF un...

Page 54: ...control PWB replacement 1 Remove the SPF upper cover as shown in 5 1 1 2 2 Remove three connectors and two screws from the SPF control PWB and remove the PWB 5 5 Clutch solenoid removal 5 6 Sensor removal 6 15 ...

Page 55: ...screw and remove the drum unit 7 Developer section 7 1 Developer unit removal 1 Open the front cover 2 While pressing down the release lever open the toner cartridge slowly and remove it 3 Loosen the step screw A 4 Pull out the developer unit 7 2 Developer cartridge removal 1 Place the magnet roller of the developer unit on the box to protect it A B A 6 16 ...

Page 56: ...and separate the toner cartridge section 2 Remove two screws C and remove the motor 7 4 Toner density sensor 8 Operation panel section medium cabinet 1 Open the front cabinet 2 Remove three screws A and two harnesses from the operation panel 3 Remove the operation panel unit 4 When removing the medium cabinet first remove the process unit and the developer unit then remove four screws B and remove...

Page 57: ... sheet and remove the ozone filter 9 2 Optical unit SPF unit cooling fan removal 1 Remove the rear cabinet 2 Remove as shown below 9 3 Ventilation fan motor 1 Remove the optical unit For details refer to 4 Optical unit re moval 2 As shown in the figure below remove the ventilation fan motor 6 18 ...

Page 58: ...rear cabinet 2 Remove the transport clutch as shown in the figure below 9 5 Paper exit sensor 1 Open the front panel 2 Move the open close lever to the right and open the upper unit slowly 3 Remove the sensor as shown in the figure below 6 19 ...

Page 59: ...ment table 4 Others 1 Transfer charger wire installation 2 DV bias adjustment 3 Separation charger output adjustment 1 Developer section 1 MG roller main pole position adjustment If the MG roller main pole position is improper the following troubles may occur Insufficient copy density Toner splash 1 Remove the DV unit from the body and remove the DV cover 2 Tie a string to a needle as shown in the...

Page 60: ...ixing screw 3 Insert a 0 6mm thickness gauge into the clearance between the MG roller and the DV doctor in the range of 30mm width under the DV doctor fixing screw 4 Press the DV doctor in the arrow direction and tighten the DV doctor fixing screw 5 Check that the clearance of the DV doctor is 0 6 0 03mm in the range of 30mm width under the DV doctor fixing screw Note When adjusting be careful not...

Page 61: ... be started midway in the flowchart only if all the previous items have been properly adjusted 3 If the content of an adjustment item in the flowchart is changed all the following items must be adjusted accordingly Any adjustment item is based on the previous adjustment items and relates to the following adjustment items 4 Sim in the flowchart stands for Simulation START Adjust the lens unit incli...

Page 62: ...ch other NO NO YES 2 NO 3 Use the test chart UKOG 0089CSZZ or the resolution chart to make a 100 copy on B4 or 8 1 2 x 14 paper so that the resolution patterns are copied at the center and the four corners Check the resolution at the center and the four corners Is the center resolution more than 5 0 lines mm and are the corner resolutions more than 4 5 lines mm Set the scale along the document ref...

Page 63: ...ence is within the specified range Make a 100 copy with Sim50 1 5 Measure the distance between the copy image lead edge and the copy paper lead edge 0 1 0 mm Change the Sim50 1 set value B so that the difference is within the specified range Zoom model NO Is the SPF installed Use the SPF to make a 100 copy Measure the distance L3 between the copy image lead edge and the copy paper lead edge Calcul...

Page 64: ...ted by making a copy and adjusting parallelism of the mirror For that purpose this adjustment must have been properly per formed IV Cases when the adjustment is required 1 When the lens or the lens unit is disassembled or its part is replaced 2 When the copy image is distorted as follows because of different copy magnification ratios in different sections V Necessary tool Screwdriver VI Adjustment...

Page 65: ...on by setting the optical axis of the copier and that of the No 4 5 mirror unit in parallel with each other III Note The copy image distortion adjustment is completed by making a copy and adjusting the parallelism of No 1 and No 2 scanner units For that purpose this adjustment must have been properly per formed IV Cases when the adjustment is required 1 When No 4 5 mirror unit is disassembled or i...

Page 66: ...hat the cam positioning hole is fit with the reference hole in the optical unit frame 7 Pass the M4 x 20 screw through the No 4 5 mirror unit drive cam positioning hole and fix the screw to the frame without turning the cam 8 Tighten the cam fixing screw to fix the No 4 5 mirror unit drive cam to the lens unit drive gear without moving the lens unit drive gear 9 Remove the screw which was fixed to...

Page 67: ...e Test chart for distortion adjustment Make a chart shown below by yourself Draw a rectangle on a paper B4 or 8 1 2 x 14 as shown below Be sure to make four right angles VI Adjustment procedure 1 Remove the right upper side cabinet and the document refer ence plate 2 Remove the document glass 3 Loosen the fixing screw of the No 1 scanner unit wire 4 Manually turn the scanner unit drive gear to bri...

Page 68: ...ing plate and insert the 1 0 mm spacer be tween No 1 scanner unit and upper R frame bring No 1 scanner unit into contact with upper R frame and fix it to the scanner unit drive wire Procedures 1 to 8 are for adjustment of mechanical hori zontal parallelism No 1 scanner unit and No 2 scanner unit are fixed to the specified positions and the mechanical hori zontal parallelism of No 2 scanner unit is...

Page 69: ...he height of No 4 5 mirror unit in the front frame side The right left balance adjustment is performed by changing the right left balance of No 2 scanner unit rail The right left balance adjustment must be performed in advance to the overall adjustment II Purpose The purpose of this adjustment is to set parallelism of the verti cal optical axis of the copier and that of No 4 5 mirror unit and No 2...

Page 70: ...eft balance of image distortion is proper 4 Change the height of the roller in No 4 5 mirror unit front frame side to adjust the vertical image distortion If the copy image is tilting as shown in sample X below lower No 4 5 mirror unit If it is tilting as shown in sample Y below lift No 4 5 mirror unit 5 Make a copy to check the vertical image distortion If the four angles are right angles the adj...

Page 71: ...nter position adjustment at the docu ment reference position 2 Make a normal copy 100 on A4 or 8 1 2 x 11 paper 3 Check that the image of the line is at the center of the paper Standard 0 1 5mm 4 If the image of the line is not at the center of the paper perform the following procedure 5 Remove the right side cabinet and the document reference plate 6 Remove the document glass 7 Remove the optical...

Page 72: ...cedures 1 Set the test chart on the document table 2 Make a normal copy 100 on A4 or 8 1 2 x 11 paper 3 Check that resolutions at the copy paper center and the four angles are as shown in the table below Standard Unit lines mm Copy center Corner Normal 100 5 0 4 5 Enlargement 5 0 4 5 Reduction 4 5 3 6 If any resolution is out of the above specifications perform the following procedures 4 Remove th...

Page 73: ...erformed properly Image distortion adjustment Focus adjustment Firstly adjust the vertical magnification ratio in the normal 100 copy mode then adjust in the zoom copy mode Never reverse the sequence The vertical magnification ratio adjustment in the zoom copy mode must be performed when the vertical magnification ratio in the normal 100 copy mode is proper but the copy size is not proper in the z...

Page 74: ...tio is within the specified range 129 0 9 If it is out of the specified range perform the following proce dures 7 Execute simulations 26 8 C 0 0 C 26 CB 8 CB The set vertical copy magnification ratio in the zoom copy mode will be displayed in the COPIES SELECTED display 8 Enter a new vertical copy magnification ratio with the numeric key and press PRINT button The above procedure changes the lens ...

Page 75: ...recise adjustment 2 Set the copy magnification ratio to 100 3 Make a copy on A3 or 11 x 17 paper 4 Measure the length of the copied scale image 5 Calculate the horizontal copy magnification ratio Horizontal copy magnification ratio Copy image size Original size x 100 6 Check that the actual copy magnification ratio is within the specified range 100 0 8 If it is out of the specified range perform t...

Page 76: ...n the copy magnification ratio is set to a larger value the actual copy magnification ratio becomes larger When the copy magnification ratio is set to a smaller value the actual copy magnification ratio becomes smaller Repeat procedures 1 to 8 until the horizontal copy magnifi cation ratio in the SPF copy mode is within the specified range VII Troubles caused by improper adjustment 7 Uniformity ad...

Page 77: ...hanged In the models which have no zoom copy functions however the lead edge position of an image on the photoconductor for the lead edge position of a document on the document table is not changed The relative position of the paper is changed at OFF timing of the scanner home position sensor after starting scanning to ad just the copy image position on the paper On the SF 2214 to adjust the copy ...

Page 78: ...py paper is also changed When the set value is changed by 1 the position of the copy image on the copy paper is changed by about 0 123 mm When the set value is made greater the copy image position for the copy paper moves backward When the set value is made greater the copy image position for the copy paper moves for ward Adjustment value C Corresponds to the time interval from the SPF resist roll...

Page 79: ... in procedure 7 into the formula below to calculate adjustment value A and adjustment value B Not required for the models without zoom func tions Zoom model only A 8 2423 x L1 L2 B 16 0568 x L2 7 9661 x L1 9 Set the adjustment values obtained in procedure 8 Not required for the models without zoom functions 10 Execute simulations 50 1 to make several copies at each of 129 and 64 Not required for t...

Page 80: ...ent value B and repeat procedure 13 until it is within the above range 14 Set documents in the SPF and make several copies at 100 with simulations 50 1 15 Measure the distance from the paper led edge to the copy image lead edge of each copy paper and calculate the average value L3 Average distance mm from the copy paper lead edge to the copy image lead edge Only in the SPF models 16 Substitute the...

Page 81: ... dirt on the fuser section pawl by obtaining the max effective copy area and the proper void area III Note If the proper void area is not obtained the separation ability in the photoconductor section may be degraded and dirt on the fuser section pawl may be increased Before performing this adjustment the following adjustment must have been completed If not this adjustment cannot be performed prope...

Page 82: ...e void area be comes greater and vise versa 13 Make a copy in the SPF mode and check that the void area is within the specified range Standard 0 0 3 mm If the void area is outside the specified range check adjust ment value C of simulations 50 1 or check the SPF unit mechanism section End edge void area adjustment Cassette paper feed mode 1 Set a scale and A4 or 8 1 2 x 11 paper on the document ta...

Page 83: ...d area is within the specified range Standard 0 0 3 mm If the void area is outside the specified range change the set value of simulations 45 and repeat procedures 9 to 12 When the set value is changed by 1 the void area is changed by about 0 123 mm When the set value is made greater the void area be comes greater and vise versa End edge void area adjustment Paper feed tray mode 1 Press the paper ...

Page 84: ...ty adjustment must be performed in the following five mode Copy density adjustment mode Exposure level Sim No Original table copy mode Normal mode Non toner save mode 1 5 46 1 Toner save mode 1 5 Photo mode Non toner save mode 1 5 Auto mode Non toner save mode 1 5 Toner save mode 1 5 SPF copy mode Normal mode Non toner save mode Set to the copy mode in the original table copy mode 51 6 Toner save ...

Page 85: ...t procedures i the normal mode Non toner save mode D Photo copy mode Non toner save mode copy density adjustment There is no toner save mode in the photo copy mode 1 Set the adjustment mode to the photo copy mode Press the copy mode select key to light the photo copy mode lamp Check the gray scale copy to insure that 7 is slightly copied and 6 is not copied When the copy density is too dark increa...

Page 86: ...G Copy density adjustment in the SPF copy mode In copy density adjustment in the SPF copy mode the copy density in each individual copy mode is not adjusted separately All copy densi ties in the copy modes adjusted by the original table copy mode copy density adjustment are shifted together When therefore the original copy mode copy density is changed this adjustment should be also performed 1 Exe...

Page 87: ... Photo N TS P 1 5 Auto N TS A 1 5 TS A P 1 5 1 10 W 2 3 4 5 6 7 8 9 Not copied Slightly copied 1 10 W 2 3 4 5 6 7 8 9 Not copied Copied 1 10 W 2 3 4 5 6 7 8 9 Not copied Slightly copied 1 10 W 2 3 4 5 6 7 8 9 Not copied Copied 1 10 W 2 3 4 5 6 7 8 9 Not copied Slightly copied 1 10 W 2 3 4 5 6 7 8 9 Not copied Copied 1 10 W 2 3 4 5 6 7 8 9 Not copied Slightly copied 1 10 W 2 3 4 5 6 7 8 9 Not copie...

Page 88: ... and adjust the separation corona voltage to 3 5 0 35v by rotates VR1 on the lower unit control PWB SHVG turns on 30 sec 3 How to adjust the developing bias voltage 1 Install the developer unit and OPC drum unit into the main body 2 Set the digital multimeter range to DC 500V 3 Connect the digital multimeter to the developing bias output termi nal on the lower unit control PWB and chassis GND 4 Ex...

Page 89: ... number is displayed on the copy quantity display Is there a sub code YES NO Press the print key Press the print key 00 blinks on the copy quantity display Ready for entry of the sub code Enter the sub code with numeric keys Press the print key Is the test command for operation check Operations according to the simulations are performed The set adjustment value or the counter value is displayed on...

Page 90: ...er save Process 44 1 Correction mode setting 8 9 Counter Copy count 22 1 Maintenance counter display 2 Maintenance preset counter display 5 Total counter display 12 Drum counter display Maintenance 20 1 Maintenance counter value reset 21 1 Maintenance cycle setting Drum count 24 7 Drum count value reset Operation check General Aging mode 7 1 Warm up time display and aging 8 12 4 Omitting warm up 6...

Page 91: ...it 26 8 Used to adjust the copy magnification ratio in zoom copy The lens shift amount in zoom copy is changed to provide suitable magnifica tion ratio There is a slight variation in each lens focal distance If the lenses are shifted in a same amount in zoom copy suitable magnification ratio may not be obtained To correct this therefore each lens is shifted according to its focal distance The lens...

Page 92: ... to the copy mode in the original table copy mode 51 6 Toner save mode Photo mode Non toner save mode Auto mode Non toner save mode Toner save mode Copy density level exposure level copy lamp applying voltage to operation panel density display level In the manual copy mode and the photo copy mode Set point A exposure level copy lamp applying voltage at copy density level 1 and point B exposure lev...

Page 93: ... value is displayed on the COPIES SELECTED display Enter the adjustment value with the numeric key and press the print button and the value will be stored in the main PWB RAM It is required to make a copy and adjust However the rough input value can be obtained from the following formula Input value Current set value Magnification ratio correction rate 10 2 Used to adjust the horizontal magnificat...

Page 94: ... edge and copy image mm Only in the SPF model A 8 2423 x L1 L2 It corresponds to the time required for the scanner to reach the document lead edge image position from starting scanning It is in other word the value used to determine the optical position of the document lead edge reference position of the document table and must be fitted to the edge section of the document reference plate If this ...

Page 95: ...charger voltage 7 30 The separation charger unit is turned on for 30 sec 9 Used to check the voltage of the main charger the transfer charger and the separation charger The main charger unit the transfer charger unit and the separation charger unit are turned ON for 30 sec SPF unit 48 3 Used to adjust the horizontal magnification ratio When the SPF is used The adjustment is performed by changing t...

Page 96: ... the main motor in warming up There are two operation modes auto and manual Either of the two can be set Operation procedure When the simulation key operation is performed the code number of the currently set operation mode is displayed Enter the code number corresponding to the desired operation mode and press the print button and the operation mode will be set Code number Operation mode Operatio...

Page 97: ... maintenance cycle maintenance preset counter Operation procedure The currently set maintenance cycle value is displayed dividedly by 2 digits three times on the COPIES SELECTED display There is a pause between any two displays After the longest pause the top two digits are displayed 5 Used to check the total count value Operation procedure The total count value is displayed dividedly by 2 digits ...

Page 98: ... to check the operations of the sensors Sensor name Display lamp Option tray cover open close detector CSDSW Toner empty lamp Option tray paper feed sensor CSPPD Jam lamp Option tray open close detector CPED2 Upper tray lamp Option tray detector OCSD Lower tray lamp Mult manual paper feed unit defects SPF Jam lamp Single manual paper feed unit defects SPF lamp Optical unit 1 1 Used to check the op...

Page 99: ...Used to check the operation of the SPF paper feed clutch and its control circuit Operation procedure The SPF paper feed clutch turns on for 10 sec 5 Used to check the operation of the SPF resist clutch and its control circuit Operation procedure The SPF resist clutch turns on for 10 sec Operation unit 5 1 Used to check the operations of the lamps on the operations panel and their control circuits ...

Page 100: ...k the operation of the sections other than the optical unit and to check the operation of the toner density sensor Operation procedure The main motor rotates and the units connected to the main motor operate accordingly The output level of the toner density sensor is displayed on the COPIES SELECTED display Operation check Gereral Aging mode 7 1 Warm up time display and aging When this simulation ...

Page 101: ...10 key Simulation code selection Blink ON 3 Press the COPY button Simulation code determined Blink ON 4 Enter the selection code with 10 key Simulation code menu selection Blink ON 5 Press the COPY button Simulation code menu determined Blink OFF 6 Press the paper feed section select key Escape from user simulation OFF Returns to copy quantity display Press the clear key When this key is pressed d...

Page 102: ...play After repairing the trouble section clear the self diag display accord ing to the table below Clearing the self diag display Self diag display Display clearing procedure L1 L3 L4 L5 L8 Turn off on the power H3 H4 Execute simulation 14 U2 Execute simulation 16 CH PC When the trouble is cancelled the display is cleared YES NO A trouble occurs The abnormalality is detected by sensors and detecto...

Page 103: ... The scanner motor drive pulses required for the scanner unit to return are shifted more than 50 pulses for the drive pulses required for feeding The corresponding distance is 10mm or more 2 The scanner motor drive pulses required for the scanner unit to return are within 50 pulses for the drive pulses required to feed 3 The scanner unit does not return Or through it returns the scanner unit does ...

Page 104: ... movement the lens home position sensor is not ON when in enlargement copying or not OFF when in reduction copying Cause 1 Lens motor trouble 2 Main control circuit trouble 3 Lens motor rotation sensor and its input circuit main control PWB trouble 4 Lens motor drive mechanism trouble 5 An overload on lens motor drive mechanism Remedy Use simulations 1 3 or 1 4 to check the following items A Check...

Page 105: ...emperature does not reach the specified temperature within 60 sec after starting warming up Cause 1 Thermistor and its input circuit main control circuit trouble disconnection 2 Heater lamp trouble 3 Heater lamp control signal and its control circuit trouble The heater lamp remains ON Remedy Check the following items 1 Check the thermistor and its input circuit main control PWB for disconnection o...

Page 106: ...above the specified voltage 3 49V Cause 1 Toner sensor trouble 2 Toner sensor input circuit trouble main control circuit 3 Toner motor and its control circuit trouble Remedy Use simulations 25 2 to check the following items 1 Toner sensor 2 Toner sensor input circuit 3 Toner motor and its control circuit After repair use simulations 14 to cancel the self diag CH Light Content Paper feed section co...

Page 107: ...ox 2 Toner motor and its control circuit main PWB 3 Toner supply section 4 Toner sensor and its control circuit main PWB Toner empty Blin Content Toner density fall 8 12 Detail 1 No toner in the toner box 2 Toner density falls below the specified level Cause 1 No toner in the toner box 2 Toner motor and its control circuit main PWB trouble 3 Toner supply section clogging 4 Toner sensor and its inp...

Page 108: ...r gear etc 6 Insufficient or excessive contact pressure between the SPF resist roller and the document because of improper setting with simulation 51 7 Remedy Use simulation 2 to check the following items 1 SPF section document detector 2 SPF section document detector and its input circuit main PWB 3 SPF section paper feed and transport clutches and their control circuit main PWB 4 SPF section pap...

Page 109: ... machine properly Use the attached service memory data recording sheet to memorize the newest data when servicing in order to cope with the above situations This improves efficiency in servicing and realizes quick recovery 3 Remedies Perform the procedures according to the following flowcharts Sim in the flowchart means Simulation Memory trouble Procedures for memory trouble main control PWB repla...

Page 110: ...ecorded Use Sim 26 8 to set the vertical magnification ratio adjustment value in zoom copying Is the adjustment value of contact pressur between the main body resist roller and the copy paper recorded Use Sim 51 2 to set the adjustment value of contact pressure between the main body resist roller and the copy paper 2 Make a copy and adjust the copy density Sim 46 1 51 6 Make a copy and adjust the ...

Page 111: ...e Make a copy and adjust the SPF mode horizontal copy magnification ratio Is the adjustment value of contact pressure between the SPF resist roller and the document recorded Use Sim 51 2 to set the adjuatment value of contact pressure between the SPF resist roller and the document Is the SPF resist roller ON timing adjustment value recorded Use Sim 50 1 to set the SPF resist roller ON timing adjus...

Page 112: ...mode 47 The AE sensor and the optical section characteristics memory data for the change in the copy lamp application voltage 48 1 The vertical copy magnification ratio adjustment value 2 The horizontal copy magnification ratio adjustment value when the document table is used 50 1 The adjustment value of copy image position on the copy paper SEt value A Set value B Set value C SPF unit 48 3 The ho...

Page 113: ...he copy lamp application voltage 7 26 48 1 50 The vertical copy magnification ratio adjustment value 7 15 2 50 The horizontal copy magnification ratio adjustment value when the document table is used 7 16 50 1 The adjustment value of copy image position on the copy paper 7 19 50 Set value A 50 Set value B 50 Set value C Process 44 1 Process correction mode setting Developer unit 25 2 Toner density...

Page 114: ...periodic replacement Toner supply Replacement at every 4K by the user DV seal Drum Drum main charger Case saw teeth F F F Screen grid F F F Drum separation pawl F F F Cleaning blade Toner reception seal Transfer Transfer charger wire F F F Separation plate Half etching Transfer charger case F F F F F F Fusing Fuser lower CL roller Fuser upper heat roller F F F Fuser bearing F F F Fuser gears F F F...

Page 115: ...SPS POD MPFS MPFC LUM CPFC1 PWD PPD LUPD CPED1 CPED2 CSDSW CSPPD CPED2 Lower unit PWB BIAS SHV High voltage circuit PWB MHV THV GRID CRU PWB DC power supply circuit HL CL AC circuit PWB Interlock switch AC power Power trans Main switch Dry heater Personal counter Operation PWB Main circuit PWB CPU memory driver 3 RE PWB 6 Power ON JAM RPL ON PSW ON RPL ON Initial setting Memory transfer Trouble Do...

Page 116: ...ank lamp Discharge lamp Transport clutch Separation solenoid Multi bypass paper feed clutch solenoid SPF motor control SPF paper feed transport clutch External interface Thermistor Toner sensor Developer color detection Main PWB destination detection SPF paper sensor DC power section Toner motor Thermistor 1 P70 AN0 2 P67 TB2IN 3 P66 TB1IN 4 P65 TB0IN 5 P64 INT2 6 P63 INT1 7 P62 INT0 8 P61 TA4IN 9...

Page 117: ...ffer Q0 8 Command cue buffer Q1 8 Command cue buffer Q2 8 Incrementor 24 Program address register PA 24 Data address register DA 24 Incrementor decrementor 24 Program counter PC 16 Program bank register PG 8 Data bank register DT 8 Input buffer register IB 16 Processor status register PS 11 Direct page register DPR 16 Stack pointer S 16 Index register Y 16 Index register X 16 Accumulator B 16 Accu...

Page 118: ...m cooling fan motor control signal 25 P40 POD OUT H Paper exit detecting sinal 26 BYTE BYTE IN External data bus select signal L 16 bit H 8 bit 27 CNVss CNVSS IN H Processor mode selection 28 RESET RESET IN L Reset signal Reset at L 29 XIN XIN IN Clock IN 30 XOUT XOUT OUT Clock OUT 31 E E OUT Enable output 32 Vss Vss OUT Power GND 33 P33 PNC OUT Personal counter clock 34 P32 TRC OUT H Transport ro...

Page 119: ... Analog Digital convertor ground pin 73 Vss Vss Power GND 74 P77 ANS IN Analog input signal SPF sensor input 75 P76 MBT IN Analog input signal Main PWB destination setting 76 P75 CLV IN Analog input signal Copy lamp control 77 P74 RTH IN Analog input signal Fusing thermistor 78 P73 CRUT IN Analog input signal CPU destination setting 79 P72 DVC IN Analog input signal Developer color detection 80 P7...

Page 120: ... heater lamp lighting signal is not generated IC112 output 14 pin is normally HIGH Open state When the heat roller surface temperature is lower than the set temperature a Since the thermistor pin voltage is higher than the set level output signal HL from the CPU becomes HIGH b HL signal is passed through IC102 TR and Q110 to the solid state relay When therefore HL signal is LOW the internal triac ...

Page 121: ...nsor PWB which is com posed of the photo diode and the I V convertor circuit and the amplifier circuit on the control PWB Operation amplifier A performs I V conversion of the original density level minute current from the sensor Operation amplifier B amplifies the output of operation amplifier A to a suitable level for inputting to the CPU The amplifying level is automatically set by selecting the...

Page 122: ...circuit It is equipped with the delay circuit to provide delay time just by adding an external capacitor 2 Operation After td 30msec from when the voltage exceeds 4 25V after power rising the output becomes HIGH td is set by the external capacitor TMa TMb R208 47KJ R209 47KJ 2 9 1 5 5V IC104 TA7291S IN1 IN2 GND 6 8 7 3 M C102 10UF35V TMa TMb 24V I O 2 8 9 1 5 6 7 3 M REG GND Protection circuit Hea...

Page 123: ... IC1128 NJM2901M FW R160 47KJ R161 10KJ C131 0 01µF R166 30KF 1 5 BR102 10KJ x 4 1 4 BR102 10KJ x 4 5V2 FWS C138 1000P R165 15KF 10 9 8 IC1128 NJM2901M R166 30KF D103 1SS133 R167 15KF R166 30KF C107 0 47µF 50V R169 200KF R170 82KF CLV 10 11 13 IC1120 NJM2901M DTC114YK Q107 CLPWM R171 3 9KF 24V ZD103 HZ59A3 R173 1KJ CLPWM 5V2 R202 4 7KJ C133 0 047µF D102 1SS133 R174 1KJ 5V2 R175 10KJ Q108 2SC2411K ...

Page 124: ...rmally short the DC level applied to the IC112 10 pin becomes higher than the reference voltage of 11 pin driving the 13 pin output to the GND level Therefore the lighting signal is not transmitted to R174 and later section and the lamp is not lighted By setting the reference voltage to a level not exceeding the rated voltage an abnormal lighting is avoided 1 When the AC input voltage becomes low ...

Page 125: ... of W0 Q25 W7 Q32 and KEY0 KEY2 With W0 signal at LOW GND and W1 W7 at HIGH open the level of KEY0 KEY2 is checked and H or L state of 4K 2K and 3K in the key matrix is judged to judge ON OFF For W1 W7 switching is made every 2 msec for judgement W0 W1 W2 W3 W4 W5 W6 W7 KEY0 KEY0 HIGH GND 2m sec 16m sec 4K ON 4K OFF KEY0 KEY1 KEY2 3K 2K 4K W0 Q25 LC7935 5V2 5V1 CPU 12 11 ...

Page 126: ...ng timing of the latch signal The retained data is outputted when STROBE signal becomes HIGH 5V VD CLK LATCH S IN OUT VD 5V VD 10V LED DATA CLK LATCH ENABLE S OUT BEO Main control circuit STROBE VD 5V DC power circuit VD 5V VD 10V DATA Sout CLK LATCH ENABLE GND 32 bit Shift Register 32 bit Latch Driver ON OFF Control Driver 01 032 VD GND 1 5V 5V 5V 1 2 3 4 Clock Data signal Latch signal Strobe sig...

Page 127: ...pplied to loads 1 Signal name and output voltage GND 0V VH 30 44V Separated into 24V and 32V supply in the main PWB VD 24V 35V Forms 5V supply in the main PWB FW Full wave rectification AC PWB unit DTB113ZS 5V1 RDL1 PEL MDL0 MDL1 Q1 Q2 F1 Q4 LC7935 GND MDL0 GND MDL1 GND FO 2m sec RDL1 ON PEL ON Cycle 4 msec 1 2 duty 10 14V FW VH CNE 1 F504 CNB 5 POWER TRANS CNA 3 F503 _ _ F505 CNB 6 CNB 1 CNB 2 RB...

Page 128: ...01 DSS131 L 6 P GND ZD101 RD13EB1 ZD102 RD13EB1 C142 22000PF C143 22000PF C102 47uF 35V C145 22000PF POWER GND 5V1 5V1 5V1 CHK JP C146 22000PF C104 47uF 10V 1 2 3 IC101 MC7805CT C101 0 47uF 25V L 3 5V1 L 4 S GND C147 22000PF C105 4 7mF D126 RB411D 5V2 CHK JP 5V2 5V2 VH VD About 32V VH 5V VD 24V VB NPN transistor Zenor diode Three termonal regulator 12 14 ...

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