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Samsung SCX-1100, Service Manual

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Samsung SCX-1100 Service Manual Download Page 28

4-6

Troubleshooting

Samsung Electronics

4-3-3  Defective Operation (LCD WINDOW            ) Display

4-3-4  No Power

• Description

• Location

1.OPE ASS'Y

2.Connection between the Main B'D and OPE ASS'Y

3.Main B'D.

Strange characters are displayed on the OPE Panel and buttons are not operated.

Check and Cause

Solution

1. Clear the memory.

2. Check if OPE HARNESS is connected to the Main

Board correctly.

1. Try again after clearing the memory.

2. After confirming that OPE HARNESS is connected to

the Main Board correctly, if it is so, then replace the
OPE ASS'Y and Main Board in sequence.

• Description

• Location

1.Power code        2.Connection between the Main B'D and Power HARNESS  
3.Power ASS'Y

4.Main B'D.                 5.OPE Ass’y

While the power S/W is turned on, it does not work at all.

Check and Cause

Solution

1. Check if the connection of power code is normal.

2. Check if DC +3.3V and +30V is supplied to POWER

ASS'Y from MAIN B'd.

3. Check if POWER DOWN KEY in OPE ASS'Y is

working regularly. 

1. Try to replace the power code.

2. If all the connections are correct, try to replace the

power ASS'Y and the Main B/D in sequence. 
( +3.3V and +30V is supplied to POWER ASS'Y from
MAIN B'd)

3. Replace OPE ASS'Y

Summary of Contents for SCX-1100

Page 1: ...UNG INKJET PRINTER MFP SCX 1100 Manual INKJET PRINTER MFP CONTENTS 1 Precautions 2 Specifications 3 Disassembly and Reassembly 4 Troubleshooting 5 Exploded Views and Parts List 6 Block Diagram 7 Connection Diagram ...

Page 2: ...CS Samsung Electronics Co Ltd March 2001 Printed in Korea VERSION NO 1 02 CODE JB 0023A This service manual is also provided on the web the ITSELF system Samsung Electronics Co Ltd http itself sec samsung co kr ...

Page 3: ... of the information in this manual are prohibited from free duplication use or translation without prior written approval except in cases allowed by the Copyright Act Specifications are subject to change without prior notice Copyright c 2002 3 Samsung Electronics Digital Printing CS Group ...

Page 4: ... flown Otherwise any hazard such as an electric shock or a fire could occur Very careful precautions should be taken when replacing parts Before replacing please check cables because you cannot put the cables that you removed for replacing parts into the proper place if you would not make sure of where they were connected and in which condition Please do the following before disassembling for a re...

Page 5: ...ic solder removal device Some sol der removal devices not classified as anti static can generate electrical charges sufficient to damage ESDs 5 Do not use Freon propelled chemicals When sprayed these can generate electrical charges sufficient to dam age ESDs 6 Do not remove a replacement ESD from its protective packaging until immediately before installing it Most replacement ESDs are packaged wit...

Page 6: ... con sumables supplied by Samsung Electronics The gram unit can be measured Driver Standard type type M3 long M3 short M2 long M2 short Pinset Standard For general home use small type Cotton Swab Standard For general home use for medical ser vice Cleaning Equipments a IPA Isopropyl Alcohol dry cloth or a soft stuff neutral detergent Software Driver installation CD ROM Mind your hands not to be tou...

Page 7: ...without HUB Mode Centronics 1284 Emulation HBP GDI Print Speed 2 Mono 14 ppm Draft 10 ppm Normal Color 7 ppm Draft 2 ppm Normal Print Resolution H x V Quick 300 x 600 dpi Normal 600 x 600 dpi High Quality 2400 H x 1200 V dpi Addressable Maximum Paper Size A4 Letter Legal Banner Effective Printing Width 8 0 203 1mm Feeding Method Automatic 100 Sheets Maximum stacking height 9mm Manual Tray No Outpu...

Page 8: ...es Memory Multi copy Zoom Rate 25 400 1 Step Contrast Control 3 Steps Ink Saver Mode Use Draft Mode 20 Savings Auto Sensing Check Paper Jam Low Ink Note 1 Speed claims based on the test chart Printed spdtstc sam mono Printed spdtstc2 sam color Letter size 2 4 Scanner Operation System Windows 98 Me 2000 XP Interface USB without HUB Mode and Centronics 1284 Compatibility TWAIN Standard Device Platen...

Page 9: ...30V 10 External Power On Off Key Power Down Key It does not cut the primary power input off 2 6 Dimension Machine Size W x D x H mm 477 W X 415 D X 252 H Machine Weight About 8 5 Kg Machine itself Note 4 No load condition 2 7 Environmental Condition Absolute Storage Temperature 5 20o C 55o C Absolute Storage Humidity 5 10 RH 90 RH Recommended Temperature 5o C 40o C Operating Condition Humidity 15 ...

Page 10: ...vicing the machine you must perform as fol lows 1 Check to verify that documents are not stored in memory 2 Unplug the power cord 3 Use a flat and clean surface 4 Replace only with authorized components 5 Do not force to remove or planten plastic material compo nents 6 Make sure all components are in their proper position 3 2 Scanner Ass y 1 Remove two screws securing the rear cover 2 Open the fro...

Page 11: ...e screws securing the OPE upper and unplug the one connector from the OPE panel 8 Remove two screws securing the scan upper and remove it 9 Unlatch the scan lawer securing the scan upper and remove it 10 Remove the two screws securing the scan upper 3 2 samsung Electronics Disassembly and Reassembly ...

Page 12: ...D cabl 13 Push the belt holder and take out the belt as shown below 14 Pull up the CCD shaft and take out the scanner module 15 Remove two screws and take out the motor bracket 16 Remove two screws securing the scan motor and remove it samsung Electronics 3 3 Disassembly and Reassembly ...

Page 13: ...ard and remove it Take out the LCD window from the OPE cover 3 Remove five screws securing the OPE upper to the OPE PBA 4 Remove two screws securing the OPE upper to the LCD board 5 Remove the contact rubber from the OPE upper 6 Remove the Key pad from the OPE upper 3 4 samsung Electronics Disassembly and Reassembly ...

Page 14: ... rear cover you should remove Scanner Ass y see page 3 1 2 Pull the extension guide upward and remove it 3 Remove four screws securing the rear cover 4 Remove the rear cover as shown below samsung Electronics 3 5 Disassembly and Reassembly ...

Page 15: ...g the one connector from the main PBA 3 Pushing down the hooks on both ends pullout the SMPS 3 6 3 6 Engine Ass y 1 Before you remove the engine ass y you should remove Scanner Ass y see page 3 1 Rear Cover see page 3 5 2 Unplug the SMPS connector and cover open sensor connector from the main PBA 3 Remove the three screws securing the engine ass y and remove it ...

Page 16: ... you remove the asf feeder you should remove Scanner Ass y see page 3 1 Rear Cover see page 3 5 SMPS see page 3 6 2 Make sure the harness is released from the hooks as shown below 3 Remove three screws securing the ASF feeder to the main cover Take out the ASF feeder 3 7 ...

Page 17: ...age 3 6 ASF Feeder see page 3 7 2 Rotate to remove both springs securing the carrier shaft Then take out the carrier shaft 3 Remove the C cab 4 Take out the emcoder strip as shown below 5 Push the holder pulley to the right and take out the belt 6 Take out the cartridge carrier from the main frame 3 8 samsung Electronics Disassembly and Reassembly ...

Page 18: ...ge 3 1 Rear Cover see page 3 5 Engine Ass y see page 3 6 ASF Feeder see page 3 7 Cartridge Ass y see page 3 8 2 Unplug the one connector from the main PBA 3 Remove two screws securing the carrier motor and take out the motor from the main frame samsung Electronics 3 9 Disassembly and Reassembly ...

Page 19: ...see page 3 5 Engine Ass y see page 3 6 ASF Feeder see page 3 7 Cartridge Ass y see page 3 8 2 Unplug all connectors from the main PBA 3 Remove the two screws securing the main PBA 4 Pull the sensor lever backward and take out the main PBA as shown below 3 10 samsung Electronics Disassembly and Reassembly ...

Page 20: ...ch the holder by pushing the parts hooked to the main frame using a sharp tool 3 Pull the holder downward and take it out from the main frame 3 12 Home Ass y 1 Before you remove the home ass y you should remove Scanner Ass y see page 3 1 Rear Cover see page 3 5 Engine Ass y see page 3 6 ASF Feeder see page 3 7 2 Remove one screw securing the home ass y 3 Unlatch the home ass y by pushing the parts...

Page 21: ...tridge Ass y see page 3 8 Main PBA see page 3 10 Hold Roller see page 3 11 Home Ass y see page 3 11 2 Remove the four springs and take out the four roller frictions as shown below 3 Take out the actuator feed from the main frame as shown below 4 Remove the exit roller from the main frame and take out the exit belt 5 Unlatch the base frame ass y by pushing the parts hooked to the main frame using a...

Page 22: ...e see page 3 12 2 Turn the bearing feed counterclockwise and take out the base frame and feed roller from the main frame 3 15 Line Feed Bracket Ass y 1 Before you remove the LF bracket ass y you should remove Scanner Ass y see page 3 1 Rear Cover see page 3 5 Engine Ass y see page 3 6 ASF Feeder see page 3 7 Cartridge Ass y see page 3 8 Main PBA see page 3 10 Hold Roller see page 3 11 Home Ass y s...

Page 23: ...SOUND ON OFF ON 4 2 Setting up System in Service Mode How to enter service mode In service tech mode the technician can check the machine and perform various tests to isolate the cause of a malfunc tion To enter the service mode press ENTER LEFT RIGHT LEFT SETUP in sequence and the LCD displays T the machine has entered service Tech mode To return to normal user mode press ENTER LEFT RIGHT LEFT SE...

Page 24: ... Dot Count 1368128 Color Yellow Dot Count 1368128 Photo Black Dot Count 0 Photo Cyan Dot Count 0 Photo Magenta DotCount 0 Total Black Dot Count 2436256 Total Color Cyan Dot Count 1368128 Total Color Magenta Dot Count 1368128 Total Color Yellow Dot Count 1368128 Total Photo Cyan Dot Count 0 Total Photo Magenta Dot Count 0 Total Photo Black Dot Count 0 Page Count Variables Total Page Count 2 Cartrid...

Page 25: ...rint control panel to clean print nozzles and check if nozzles have been blocked 2 Wipe with soft cloth the contact surfaces of ink cartridge and car riage and check if nozzles have been cleaned properly 3 Separate ink cartridge from carriage and combine them Repeat it about 5 to 6 times and check if connection is proper 4 Replace ink cartridge and check whether there s a problem with the head 5 C...

Page 26: ...opying page 4 12 4 3 17 Vertical Black Line When Copying page 4 13 4 3 18 Contaminated Stains on Paper page 4 13 4 3 19 Bad printed Image page 4 14 4 3 20 Vertical Lines are printed crookedly page 4 14 4 3 21 Bad Color Intensity page 4 15 4 3 22 The Printer is Not Working 1 page 4 15 4 3 23 The Printer is Not Working 2 page 4 16 4 3 24 Abnormal Printing page 4 17 4 3 25 Spool Error and Release of ...

Page 27: ...ly reconnect it 2 After confirming that it is proper by performing a PC printing test related to driver setup if it is not so reinstall it Refer to User s Manual Description Location 1 CCD ASS Y 2 Main B d The image PC scanned is not clear or bad Check and Cause Solution 1 Check the waveform form by performing a CCD test in TECH mode Refer to 4 1 3 2 Check if the resolution is set too low in PC Sc...

Page 28: ... Main Board correctly if it is so then replace the OPE ASS Y and Main Board in sequence Description Location 1 Power code 2 Connection between the Main B D and Power HARNESS 3 Power ASS Y 4 Main B D 5 OPE Ass y While the power S W is turned on it does not work at all Check and Cause Solution 1 Check if the connection of power code is normal 2 Check if DC 3 3V and 30V is supplied to POWER ASS Y fro...

Page 29: ...rong itself or wrongly assembled 2 Even after the key or harness has been replaced it is still wrong try to replace the OPE ASS Y and the Main B D in sequence Description Location 1 OPE ASS Y 2 Main Board The button of the OPE Panel is not operated Check and Cause Solution 1 Confirm to catch a click sound while the key is pressed on 2 Check if a specific key is pressed by another equip ment 1 If y...

Page 30: ...If the papers jammed or pieces of the paper are stuck inside the set remove them and then try it again 2 If the problem still exists try to replace ASF ASS Y Description Location ASF ASS Y A recording paper is tilted while feeding Check and Cause Solution 1 Check if the paper guide of ASF Automatic Sheet Feeder is set up properly with the width of recording paper 2 Check if too many sheets of reco...

Page 31: ...replace the Main B d and the LF Motor in sequence 4 3 10 Multi Feeding Description Location ASF ASS Y Multiple sheets of recording paper are fed at once Check and Cause Solution 1 Adjust the paper guide of ASF to the width of paper correctly 2 Check if the recording paper is preprinted or crum pled 3 Check if too many sheets of recording paper are put into ASF Automatic Sheet Feeder Standard up to...

Page 32: ... can not sense then try to replace the Main B D 2 In case the cartridge box is not moved from side to side check the Flat Cable connection between the Main PBA Frame Home Unit and even after being connected properly if it is still not improved then try to replace the cartridge ASS Y Description Location 1 Main B D 2 LF Motor The recording papers are put in already but it cannot be sensed Check and...

Page 33: ... and Cause Solution 1 Check if the connector of LF Motor is connected to the Main B D normally 1 Try to replace the Main B D and the LF Motor ASS Y in sequence Description Location 1 Main B D 2 CR Motor The drive of CR Motor is not working Check and Cause Solution 1 Check if the connector of CR Motor is connected to the Main B D normally 1 Try to replace the Main B D the CR Motor ASS Y in sequence...

Page 34: ...ain B D normally 1 Try to replace the Main B D and the Scan Motor ASS Y in sequence Description Location 1 CCD ASS Y 2 Main B D Blank page is printed out when copying Check and Cause Solution 1 Check if the recording papers are inserted reversely 2 Perform the CCD test in the service mode Refer to 4 1 3 1 Insert the paper with the copy side to be faced down 2 In case the output waveform is abnorma...

Page 35: ...D waveform is abnormal replace the CCD ASS Y 3 Clean the nozzle and confirm again 4 After confirming the CCD waveform and cleaning the nozzle if the vertical black lines still occur then try to replace the Main B D 4 3 18 Contaminated Stains on Paper Description Location 1 CCD ASS Y 2 Main B D Contaminated stains on the copied paper occur in the printing Check and Cause Solution 1 Check the status...

Page 36: ... case the CCD waveform is good clean the outlet of cartridge 2 In case the CCD waveform is abnormal try to replace the CCD ASS Y 3 Even after cleaning the outlet of nozzle the received data image is still bad then replace the cartridge 4 Try to replace the Main B D Description Location Cartridge The vertical lines are printed crookedly Check and Cause Solution 1 Test and check the cartridge arrang...

Page 37: ...ck if the PC and the printer cable are properly connected 3 Check if the printer driver is correctly installed 1 Check the power source of the printer first and perform the Printer Self Test If the test results in printing it is considered as there is no problem in the printer itself If the printer is not working the function may be defective not due to S W so take another proper measure 2 Check t...

Page 38: ...he hard disk space to store the print information is insuf ficient rather than the RAM insufficiency In this case secure more space for the hard disk Secure more space for C drive by using the Disk utilities pro gram at PROGRAM ACCESSORIES SYSTEM TOOL from the Start menu 2 The connection of the cable or printer port is not properly setup 3 If characters are printed abnormally the cable or the prin...

Page 39: ...ble with the printer currently installed or an error occurs in the driver file remove the existing driver and reinstall the printer driver by using the Printer Add menu 2 This is because of an insufficient virtual memory It does not mean the actual capacity of RAM but the space of hard disk Delete unnecessary files to secure enough space of the hard disk and try printing again Name of Printer Port...

Page 40: ...less than that recommended by the OS 1 Delete unnecessary files to provide more hard disk space and try printing job 2 Since there may be some journal files with the exten sion jnl delete them and reboot the WINDOWS to restart printing job 3 Exit all other programs except the program currently using if possible and print again 4 Delete the printer driver completely and reinstall it 5 After rebooti...

Page 41: ...monly used for all kinds of product SEC produce Mostly electronics Parts Type 2 Controlled by Division It is used or one produce Mostly Mostly mechanical Parts A S privately used part It is only used for A S Ass y part Assembled by more than 2 Parts If necessary part is not A S Part Ass y part including necessary par can be used It is shown in the diagram and drawing of SVC manual Ass y part and A...

Page 42: ...5 2 Samsung Electronics Exploded View and Parts List 5 1 Main Assembly Exploded view 0 1 3 1 1 1 2 8 7 7 1 7 2 10 11 9 S6 S3 12 6 5 4 S7 S7 S6 S6 S6 S6 13 ...

Page 43: ...SION JB72 01140A 1 O 9 SMPS MAGIC JB44 00017A 1 O 110 220 VAC 10 LABEL SHEET SMPS 1 X 11 PMO COVER SMPS JB72 01146A 1 O 12 CBF HARNESS POWER GND 1 X 13 CBF HARNESS MAIN POWER JB39 00129A 1 O S3 SCREW TAPPING 2 X M 3 X 8 mm S6 SCREW TAPTITE 9 X M 3 X 10 mm S7 SCREW TAPTITE 5 X M 3 X 6 mm O Service available X Service not available MODEL ELA UNIT OPE SCANNER ASS Y ELA UNIT OPE ASS Y SCX 1100 XEF JB9...

Page 44: ...5 4 Samsung Electronics Exploded View and Parts List 5 2 Main Cover Assembly Exploded view 3 2 1 3 2 3 1 3 3 6 5 0 4 S8 7 ...

Page 45: ...A COVER MAIN JB97 01539A 1 O 1 PMO DOOR FRONT JB72 01144A 1 O 2 PM COVER MAIN 1 X 3 MEA STACKER 1 X 3 1 PMO BASE STACKER JB72 01143A 1 O 3 2 PMO EXIT TRAY MIDDLE JB72 00978C 1 O 3 3 PMO EXIT TRAY EXTENSION JB72 00982C 1 O 4 FOOT RUBBER JB61 40901A 2 O 5 MPR FELT UPPER JB74 00014A 1 O 6 MPR FELT LOWER JB74 00015A 1 O 7 CBF HARNESS MAIN_COVER OPEN JB39 00116A 1 O S8 SCREW SPECIAL 1 X M3 X 8 mm ...

Page 46: ...nd Parts List 5 3 Scanner Assembly Exploded view 1 1 1 2 1 3 1 3 1 2 2 4 2 2 2 4 3 2 4 2 2 4 1 2 5 2 3 2 1 2 1 S3 S3 3 0 3 8 3 8 1 3 8 7 3 8 5 3 8 3 3 8 2 3 8 6 3 8 4 S7 S6 3 12 3 11 3 10 3 3 3 13 3 14 3 5 3 1 3 2 3 4 3 7 3 6 3 9 S6 S6 3 15 ...

Page 47: ...GEAR 6602 001067 1 O 3 2 SPRING BELT 1 X 3 3 ICT SHAFT CCD 1 X 3 4 PMO PULLEY 1 X 3 5 PMO HOLDER BELT 1 X 3 6 PMO SCAN LOWER 1 X 3 7 PMO HOLDER BELT 1 X 3 8 ELA ETC BRKT SCAN MOTOR JB96 01344A 1 O 3 8 1 RING E 2 X 3 8 2 MOTOR SCAN JB31 00011A 1 O 3 8 3 GEAR TIMING 1 X 3 8 4 GEAR IDLE 1 X 3 8 5 GEAR REDUCTION 1 X 3 8 6 IPR BRKT SCAN MOTOR 1 X 3 8 7 PMO HOLDER BELT 1 X 3 9 CABLE TIE 1 X 3 10 ELA MOD...

Page 48: ...5 8 Samsung Electronics Exploded View and Parts List 5 4 OPE Unit Exploded view 0 19 3 S6 S6 1 5 4 2 S3 S5 15 6 7 16 17 8 9 11 18 12 13 10 14 ...

Page 49: ...O KEY SPECIAL 1100 1 X 14 PMO KEY SCAN 1 X 15 PMO KEY POWER 1100 1 X 16 RMO RUBBER SAVE 1100 1 X 17 RMO RUBBER SETUP 1100 1 X 18 RMO RUBBER COPY 1100 1 X 19 SHEET LCD 1 X S3 SCREW TAPPING 8 X M 3 X 8 mm S5 SCREW TAPPING 2 X M 2 5 X 5 mm S6 SCREW TAPTITE 6 X M 3 X 10 mm O Service available X Service not available MODEL ELA UNIT OPE ASS Y PMO OPE APANEL SCX 1100 XEF JB96 01342A JB72 01196A SCX 1100 ...

Page 50: ...5 10 Samsung Electronics Exploded View and Parts List 5 5 Engine Ass y Exploded view 3 5 3 4 S7 S7 15 S7 11 1 11 2 ...

Page 51: ...OLDER PULLEY 1 X 3 5 PMO STOPPER PULLEY JB72 41212A 1 O 4 ICT SHAFT CR JB70 40906A 1 O 5 SPRING SHAFT CR JB61 70913A 2 O 6 MEA UNIT C R SEC JB96 01303A 1 O 7 BEARING FEED R JB66 10002A 1 O 8 MEC ROLLER FEED JB75 11112A 1 O 9 PRP ENCODER STRIP V JB72 00662A 1 O 10 MEC FRAME BASE JB75 00170A 1 O 10 1 BELT EXIT JB75 00171A 1 O 10 2 MEC EXIT ROLLER JB75 10917A 1 O 10 3 MEC HOLDER EXIT 1 X 10 3 1 IPR S...

Page 52: ...5 12 Samsung Electronics Exploded View and Parts List 5 6 Feeder Unit Exploded view 1 2 2 5 1 11 1 4 1 5 1 3 S4 1 12 1 2 2 2 2 1 2 6 2 4 2 3 1 14 1 7 1 15 1 8 1 1 1 10 1 13 1 9 1 16 0 ...

Page 53: ... X 1 7 PMO HOUSING BUCKLER 1 X 1 8 PMO BUCKLER JAG 1 X 1 9 PMO COVER ASF 1 X 1 10 PMO ASF FRAME 1 X 1 11 PMO PAPER GUIDE 1 X 1 12 PMO PAPER CAPACITY 1 X 1 13 PMO SHAFT PICKUP 2 X 1 14 PMO ROLLER IDLER 1 X 1 15 RMO BUCKLER FRICTION JB73 00019A 1 O 1 16 MPR PAD FRICTION 1 X 2 MEA UNIT PICKUP ROLL JB97 00965A 1 O 2 1 GEAR PICKUP IDLER 2 X 2 2 GEAR DRIVE PICKUP 1 X 2 3 PMO HOUSING R 1 X 2 4 PMO PICKUP...

Page 54: ...ATION NO TR SMALL SIGNAL 0501 000010 2 KSC1008 NPN 800mW TO 92 TP 120 240 Q3 Q4 AS FET JB81 00229A 1 SCX 1100 FQU2N60 600V 2A Q2 AS DIODE_SCHOTTKY JB81 00231A 1 SCX 1100 SR204 40V 2A D4 AS DIODE_FR JB81 00232A 1 SCX 1100 ER502 200V 5A D5 AS DIODE_ZENER JB81 00233A 1 SCX 1100 MTZ9 1B 500MW 8 57V 9 01V ZD1 AS DIODE_ZENER JB81 00234A 1 SCX 1100 1N4753A 1W 36V ZD4 AS DIODE_BRIDGE JB81 00235A 1 SCX 110...

Page 55: ...OLAR STEP SCAN STEPPER MOTOR DRIVER COLOR CARTRIDGE MONO CARTRIDGE PRINT HEAD 2PEN 60DPI DOUBLE HEIGHT ENCORDER SENSOR ENCODER USB CONN PC 48MHz AU1 BUZZER U27 SDRAM 4M 16bit 1284 CONN U1 HEAD Driver IC REQ ACK KEY PANNEL LCD Mcro Controller U1 U5 U 10 U 1 4 POWER MAIN OPE SCANNER 30V 5V 12V 3 3V PAPER EXIT SENSOR U4 Motor Driver Regul at or U13 U7 ARM7TDM MEM CNTR Head Control I F SCAN CNTR DERAS...

Page 56: ...GND 100nF C66 100 1 8W R24 DGND CN14 7 CN1 18 5 1K R8 R23 47K DGND CN14 22 47pF C38 5V DGND 100 R29 CN1 12 INV_POWER CN16 14 CN1 14 2SC2812L6 TA Q10 GND12 7 CN5 16 CN5 17 CN5 15 R378 TP366 5V CN14 9 0 CN1 24 11 75VA CN5 2 FPC_24 CN5 1 BD6 0 5 TP230 6 RPI 441C1 U5 CN1 4 BD12 CN14 25 100nF C208 CN14 1 CN14 32 100 R34 5V CN11 2 TP77 CN14 36 12 5VA BD13 DGND CN14 21 CN1 16 BD11 C82 100pF 10K 10K R377 ...

Page 57: ...Repair Manual Repair Manual 1 Block Diagram 2 Connection Diagram 3 Circuit Description 4 Schematic Diagrams CONTENTS INKJET RINTER MFP SCX 1100 ...

Page 58: ...SCAN MOTOR Bi POLAR STEP SCAN STEPPER MOTOR DRIVER COLOR CARTRIDGE MONO CARTRIDGE PRINT HEAD 2PEN 60DPI DOUBLE HEIGHT ENCORDER SENSOR ENCODER USB CONN PC 48MHz AU1 BUZZER U27 SDRAM 4M 16bit 1284 CONN U1 HEAD Driver IC REQ ACK KEY PANNEL LCD Mcro Controller U1 U5 U 10 U 14 POWER MAIN OPE SCANNER 30V 5V 12V 3 3V PAPER EXIT SENSOR U4 Motor Driver Regul at or U13 U7 ARM7TDM MEM CNTR Head Control I F S...

Page 59: ...2 2 1 Samsung Electronics CONNECTION DIAGRAM Repair Manual 2 Connection Diagram Reffer to the Schematic diagram see page 4 2 ...

Page 60: ...ection is the same as those listed in the circuit diagram 3 2 MEMORY MAP The entire Addressing area provided by MAIN CONTROLLER S3C46MOX Jupiter3 is 256MBytes from 0x00000000 to 0x10000000 and the Max Address Range for each External Chip Select is 32M Byte or Half word from 0x000000 to 0x01FFFFFF and embodied with Big Endian Bus interface MEMORY area is divided into EXTERNAL ROM and RAM areas See ...

Page 61: ...e and another method is to use MCLK When inputting 40MHz directly which supplies maximum 40MHz Clock to the EXTCLK terminal PIN65 The range of frequency being input in case of using X tal is limited to 4MHz 10MHz This system uses SSCG FS781 with a 10MHZ X tal outside to make MCLK and sup plies Clock to the XIN terminal PIN67 of ASIC by expanding Spectrum with bandwidth about 1 5 in comparison with...

Page 62: ...OLOR 600DPI SCAN MOTOR Bi POLAR STEP SCAN STEPPER MOTOR DRIVER COLOR CARTRIDGE MONO CARTRIDGE PRINT HEAD 2PEN 60DPI DOUBLE HEIGHT ENCORDER SENSOR ENCODER USB CONN PC 48MHz AU1 BUZZER U27 SDRAM 4M 16bit 1284 CONN U1 HEAD Driver IC REQ ACK KEY PANNEL LCD Mcro Controller U1 U5 U 10 U 1 4 POWER MAIN OPE SCANNER 30V 5V 12V 3 3V PAPER EXIT SENSOR U4 Motor Driver Regul at or U13 U7 ARM7TDM MEM CNTR Head ...

Page 63: ...y Read Timing Figure 4 Flash Memory Write Timing EXTCLK nGCSx nGCSx ADDR tRWD tRAD Tacs tRCD nWE DATA nBEx Tacc Toch Tcah Tocs tRCD tRWD tRDD tRAD tRDH 1 EXTCLK nGCSx nGCSx ADDR tRWD tRAD Tacs tRCD nWE DATA nBEx Tacc Toch Toch Tcah Tocs tRWBED Tcos tRDD tRWBED tRCD tRWD tRDD tRAD ...

Page 64: ... 5 Samsung Electronics CIRCUIT DESCRIPTION Repair Manual Figure 5 SDRAM Read Timing SCLK SCKE ADDR BA AP A10 nGCSx nSRAS nSCAS nBEx nWE DATA 1 tSAD tSAD tSCSD tSRD Trp Trcd tSCD tSBED Tcl tSWD tSDS tSDH ...

Page 65: ...3 6 CIRCUIT DESCRIPTION Samsung Electronics Repair Manual Figure 6 SDRAM Write Timing SCLK 1 SCKE ADDR BA AP A10 nGCSx nSRAS nSCAS nBEx nWE DATA tSAD tSAD tSCSD tSRD Trp Trcd tSWD tSDD tSDD tSBED tSCD ...

Page 66: ... 7 Samsung Electronics CIRCUIT DESCRIPTION Repair Manual Figure 7 SDRAM Write Timing SCLK SCKE ADDR BA AP A10 nGCSx nSRAS nSCAS nBEx nWE DATA tSAD 1 1 HZ tSAD tSCSD tSRD tSRD tSCD tSWD tSCSD tSAD Trp Trc ...

Page 67: ...IRCUIT DESCRIPTION Samsung Electronics Repair Manual Figure 8 SDRAM auto Refresh Timing SCLK SCKE ADDR BA AP A10 nGCSx nSRAS nSCAS nBEx nWE DATA tSAD 1 1 HZ tSAD tSCSD tSRD tSRD tSCD tSWD tSCSD tSAD Trp Trc ...

Page 68: ...ronics CIRCUIT DESCRIPTION Repair Manual Figure 9 SDRAM Self Refresh Timing SCLK SCKE ADDR BA AP A10 nGCSx nSRAS nSCAS nBEx nWE DATA HZ tSWD HZ 1 1 1 1 1 1 1 tCKED tSAD tSAD tSCSD tSRD tSRD tSCD tSCSD tSAD tCKED Trc Trp ...

Page 69: ...s DRAM Row active Delay tDRD 11 ns DRAM Read Column active Delay tDRCD 11 ns DRAM Output enable Delay tDOD 12 ns DRAM read Data Setup time tDDS 1 ns DRAM read Data Hold time tDDH 5 ns DRAM Write Cas active Delay tDWCD 14 ns DRAM Cbr Cas active Delay tDCCD 12 ns DRAM Write enable Delay tDWD 13 ns DRAM output Data Delay tDDD 14 ns SDRAM Address Delay tSAD 4 ns SDRAM Chip Select Delay tSCSD 4 ns SDRA...

Page 70: ... RTC related circuit part is not applied because the fax function is not applied in this system 3 3 2 6 PARALLEL PORT INTERFACE division S3C46MOX Jupiter3 has the Parallel Port Interface part enabling Parallel Interface with PC This part is connected to PC through Centronics Connector in this system which consists of ERROR PE BUSY ACK SLCT INIT SLCTIN AUTOFD STB and 245DIR as the part generating t...

Page 71: ...de assert the STROBE line Figure 10 1 ECP Hardware Handshaking Timing forward 1 The host places data on the data lines and indicates a data cycle by setting nAUTOFD 2 Host asserts nSTROBE low to indicate valid data 3 Peripheral acknowledges host by setting BUSY high 4 Host sets nSTROBE high This is the edge that should be used to clock the data into the Peripheral 5 Peripheral sets BUSY low to ind...

Page 72: ... The peripheral places data on the data lines and indicates a data cycle by setting BUSY high 4 Peripheral asserts nACK low to indicate valid data 5 Host acknowledges by setting nAUTOFD high 6 Peipheral sets nACK high This is the edge that should be used to clock the data into the host 7 Host sets nAUTOFD low to indicate that it is ready for the next BYTES 8 The cycle repeats but this time it is a...

Page 73: ...ducted when device is interfaced Interrupt transmission is used when small quantity of data is sent periodically Interval value may be known from device in the case of initial setting Bulk transmission is valid in case of trying to transmit data in large quantities or in case of transmitting them accurately Isochronous transmission should be assured of bandwidth and is used when transmitting large...

Page 74: ...at Rising Edge of PLOAD PLOAD Pulse Duration is 50n and P line value of Holding Register is done AND with PENABLE signal in order to generate appropriate Fire Pulse PLCK is available for handling as much as 4MHz Drive Current of P line is 400mA Data of P1 P4 is shifted to PDATAO that of P5 P8 shifted to PDATA1 that of P9 P12 shifted to PDATA2 and that of P13 P16 shifted to PDATA3 4 Control Signal ...

Page 75: ...3 Figure 12 SYNCHRONOUS SERIAL INTERFACE TIMING DIAGRAM TBCS TBCLK TBDO Tcs sclk Tcs sclk bit 1 bit 2 bit 3 bit 4 bit 5 bit 6 bit 7 bit 8 bit 9 bit 10 bit 11 bit 12 bit 13 SDI stays at last value MSB LSB Data Latcked on the rising edge of SCLK time Tdhd Tdsu STEPPER MOTOR DC MOTOR BIT 1 VPH_ENABLE VPH_ENABLE BIT 2 MOTOR1_CURR_I1_PHASEB Not used in this mode BIT 3 MOTOR1_CURR_I0_PHASEB Not used in ...

Page 76: ...RT NAME PIN NO I O SIGNAL NAME DESCRIPTION H L nGCS0 136 O nROM_CS FLASH MEMORY CHIP SELECT nGCS1 GOP16 137 O nIP_CS OA 980 CHIP SELECT nGCS2 GOP17 138 O reserved nGCS3 GOP18 139 O reserved nGCS4 GOP19 141 O reserved nGCS5 GOP15 PDE 142 O 245DIR P1284 DIRECTION CONTROL nGCS6 nRAS0 nSCS0 34 O reserved GOP13 nGCS7 nRAS1 nSCS1 35 O nSCS1 SDRAM1 16Mb CHIP SELECT GOP14 ...

Page 77: ...3 18 CIRCUIT DESCRIPTION Samsung Electronics Repair Manual 3 J3 Assigned GPO ...

Page 78: ...ower supplied to XC61FN3112MR is unsta ble when it becomes 3 1V 3 038V 3 162V it is checked as the POWER FAILURE And the output terminal of XC61FN3112MRF becomes LOW 0V it is applied to S3C46MOX Jupiter3 U15 and RESET LOW ACTIVE is operated When S3C46MOX Jupiter3 Reset is cancelled FLASH MEMORY connected to F_POR of S3C46MOX Jupiter3 is Reset together Output terminal of XC61FN3112MRF is pulled up ...

Page 79: ...e Section HI See Figure 14 3 5 1 1 Physical 3 5 1 2 Features Functions 10bit scanning interface Supports CIS and CCD interface Needs external ADC up to 16bit Image processing Section Full quality RGB to CMYK or 6 color conversion Photo Text detect allows mixed documents Arbitrary image scaling using true interpolation Automatic contrast and brightness correction Error diffusion or programmable dit...

Page 80: ...ook function namely the internal Boot ROM 256byte required for self initialization function too 1 Memory Map 2 Power On Off Reset Power On Reset Depending on the signal state of Reset_L pin35 OA 980 may be reset in the manner of hardware Reset is on at Low state and at High state Reset is Off Accordingly in order for OA 980 to operate normally after the System initialization the IP_RST of Jupiter3...

Page 81: ...to preparation mode to download execution file fro m Jupiter 3 Dow nlo ad e xecution file on SDR AM U27 fro m R eady RO M connected No R OM Download the execution file to SDRAM U27 from Flash Memory U9 of Jupiter 3 Initialize OA 980 by the execution file downloaded on SDRAM U27 have it to enter in the operation mode Figure 15 Boot Code Flow Diagram ...

Page 82: ...980 it configured a circuit addi tionally so that mutual Interface may be possible by making required signal using two NOR GATE UR16 and one OR Gate U40 As REG_ADDR_VAL pin27 signal is the signal for OA 980 to play a role of informing that value input into 8bit of OA 980 Bus is not Data but Address value when ADDR 10 is High and IP_CS WR Low High shall be generated as shown in the circuit diagram ...

Page 83: ... Channel is activat ed See Figure 17 Of course it performs required DMA register setting in Multiplexed 8bit Bus data address mode before DMA is accomplished 3 5 2 4 Scanner Interface Section PI It directly controls 16bit ADC and 600dpi color CCD con nected to CCD processes Shading and Gamma correc tion the basic course required for Image process of RGB 12bit 8 4bit data transferred from ADC then ...

Page 84: ...t it plays the role of saving them on the external SDRAM U27 The Data stored in the external SDRAM U27 is transferred to Head Control Part of Jupiter3 through MI and HI Block of OA 980 by DMA of Jupiter3 and then printed by Spitfire 3 5 2 9 Printer Interface Section PO When the Image process required for PC Scan See Fig 19 is completed OA 980 requests that IP_REQ signal in PO_Block should take the...

Page 85: ...3 26 CIRCUIT DESCRIPTION Samsung Electronics Repair Manual 3 5 3 COPY DATA FLOW FOR OA 980 ...

Page 86: ...3 27 Samsung Electronics CIRCUIT DESCRIPTION Repair Manual 3 5 4 OA 980 I O PORT ...

Page 87: ...3 28 CIRCUIT DESCRIPTION Samsung Electronics Repair Manual ...

Page 88: ...sists of CCD_TG CCD_CLK1 CCD_CLK2 and CCD_RS the output of OA 980 U21 CCD_TG controls the scan line which is set variously according to copy mode color and mono and scan resolution CCD_CLK1 and CCD_CLK2 are clocks by each pixel CD_RS is reset signal of each pixel Since the pixel of 1 2 cycle of CCD_CLK1 and CCD_CLK2 is sampled color signal sends RGB data to output for 1 2 cycle and controls the pi...

Page 89: ...C_CLK 133ns 7 5MHz 133ns 7 5MHz VSMP MCLK 1 6 1 3 RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA GB BA BB RA RB GA...

Page 90: ... bit 1 bit 2 bit 3 bit 4 bit 5 bit 6 bit 7 bit 8 bit 9 bit 10 bit 11 bit 12 bit 13 SDI stays at last value MSB LSB Data Latcked on the rising edge of SCLK time Tdhd Tdsu Figure 21 SERIAL INTERFACE INPUT Timing Diagram Parameter Description Min Typ Max Units Fclk Serial clock frequency 2 5 4 MHz Tclh SCLK high width 125 200 nsec Tcll SCLK low width 125 200 nsec Tcs sclk Delay nCS falling to first S...

Page 91: ...om side to side so that INK CARTRIDGE may print on the paper MOTOR TYPE PM DC MOTOR declination Drive voltage 30VDC Winding line resistance 12Ω 2Ω Driver IC Thunderbolt 2 CR MOTOR drive 2 1 DC Motor operation DC Motor drive uses positive phase terminal and anti phase terminal bound together respectively using 2nd Motor Driver MD2 of Thunderbolt ASIC inside and controls two way operation of DC moto...

Page 92: ... to bit7 bit No 13 signals among 13Bit Serial Port Inputs TBDO Signal coming into Thunderbolt ASIC transmitted from Jupiter III This Driver is driven by VBULK power source 30V and on terms of motor stall not being generated it is designed to supply current of 600mA maximum 700A current to each phase of motor Name Description Condition Min Max Units Vout DC Motor Driver Output Voltage 42 Volts Iout...

Page 93: ...Absolute Maximum Rating 2 DC Specification Name Description Condition Min Max Units V out DC Motor Driver Output Voltage 42 Volts I out DC Motor Driver Output Current 0 7 A Name Description Condition Min Max Units I peak Peak DC Motor Driver Output Current Not Stalled 0 6A Volts ...

Page 94: ...ith 8bit data without parity bit UART line has two lines for Tx and Rx and the default level is in the high state For com munication the start bit low level is transmitted before 8bit data When the data transmission 8bit is completed the high state is maintained as the stop bit high level is trans mitted Data is transmitted from LSB DO and MSB D7 is transmitted lastly 3 9 1 UART COMMUNICATION 1 UA...

Page 95: ...ion OK b0 H Note 2 ERR c0 H LCD interface of OPE OK df H When failed in the interface once when succeeded first Note 2 ERR d0 H Self initial generation of OPE e2 H LCD data keeps status quo Send data requested by the Main e0 H Data types LCD other Note 3 1_H 2_H 3_H 4_H 5_H 6_H 7_H 8_H _1H INK RESERVED RESERVED RESERVED CONTRAST RESERVED RESERVED RESERVED _2H PAPER RESERVED RESERVED RESERVED COPY ...

Page 96: ... character LCD DATA TYPE b1 H NO OF DATA 2 DATA 26 H CHECK SUM b1h XOR 2 XOR 16h a5 h 1 LINE Change to 16 character LCD DATA TYPE b1 H NO OF DATA 2 DATA 26 H CHECK SUM b1h XOR 2 XOR 26h 95 h DEFAULT 2 LINE 16 Character LCD In case the MAIN does not change the LCD types it is the Default LCD state of OPE MICOM SCX 1100 uses 1 LINE LCD DATA types Meaning Remarks a1 H LCD DISPLAY DATA FULL LINE a2 H ...

Page 97: ... in Main UART PB7 Input UART RXD from Main UART LCD ON OFF In case of VCC applied to LCD No 3 PIN BACKGROUND LEVEL all the LCD screen will be erased When the power is applied MICOM PA0 7 are Default High LEVEL so LCD will be OFF From Jupiter3 LCD will be ON simultaneously with OPE reset Q1 Q2 have the function of simply doing On off only When pressing the Power Key actual power is not turned Off b...

Page 98: ...LL RIGHTS RESERVED 4 SHEET 2 SHEET 3 SHEET 4 MODEM PART JUPITER SCH MODEM SCH DRIV SCH SCANIP SCH SAMSUNG ELECTRONICS CO LTD G A REF NO C D E PARALLEL PORT PART G PARA SCH 1 8 2 3 4 P 6 C A B C 3 E 5 E ED DATE SHEET 8 2 1 SIGN A R DRIVER PART SHEET 5 H E C K CONN SCH N MEM SCH D W 1 3 CONNETOR PART CONTROLLER PART MEMORY PART SEC IMAGE PROCESSING PART 01 08 06 SHEET 6 ...

Page 99: ... 20 100pF C181 100 R145 CN14 23 CN14 33 GND12 CN14 11 CN16 2 100nF C119 C58 220pF 9 R383 CN14 34 3 68K 4 4 7K R146 KSA1182 Y Q9 DGND 100nF C66 100 1 8W R24 DGND CN14 7 CN1 18 5 1K R8 R23 47K DGND CN14 22 47pF C38 5V DGND 100 R29 CN1 12 INV_POWER CN16 14 CN1 14 2SC2812L6 TA Q10 GND12 7 CN5 16 CN5 17 CN5 15 R378 TP366 5V CN14 9 0 CN1 24 11 75VA CN5 2 FPC_24 CN5 1 BD6 0 5 TP230 6 RPI 441C1 U5 CN1 4 B...

Page 100: ...pF DGND TP3 100 1 16W RA2 100 R95 100 R60 22pF C219 100nF C111 100 100 R86 R73 R56 100nF C91 100nF C92 100 C77 100nF DGND 4 7K R74 DGND R71 100 100 R72 3 3V DGND SD16150J7 10 000M X1 22pF C218 C70 100pF C217 0 68nF R63 4 7K 22pF C125 0 32768MHz X3 3 3V 0 R76 4 7K R75 DGND 4 7K R78 3 3V R90 100 DGND 3 3V FS781BZB U37 100nF C64 1 16W RA3 DGND R61 100 C90 10nF 4 7K R65 3 3V R87 100 R58 100 100 R57 3 ...

Page 101: ...D 68K R12 VB DGND U8 K4S641632D TC75 U1 1 MC74VHC32DR2 5 5V 5V R32 0 1 5K R17 3 3V C56 U2 4 74VHC08MX DGND 100nF 100nF C4 100nF 100nF C43 C18 C5 100nF DGND VB DGND DGND U9 K4S161622D TC70 MMSD914T1 D2 R9 10K R10 10K 0 R41 DGND 0 R22 R42 0 DGND VB2 DGND 100nF C51 C10 100pF DGND Q2 KSA1182 Y DGND 100nF C52 U7 1107 001302 DGND 3VB MC74VHC32DR2 U1 2 3 3V C44 100nF DGND C55 100nF 2SC2812L6 TA Q8 U3 1 7...

Page 102: ...0 R4 0 C34 R70 1nF 10K C16 22pF C72 22pF 820pF C83 GND30 30VB MC74VHC32DR2 U18 2 GND30 DGND 5V DGND 30VB 3 3V C24 47nF C23 47nF 30VA C63 5V 820pF 2401 000880 3 3V MC74VHC32DR2 U18 1 50V 220uF C28 22pF C73 GND30 2 7K R54 C41 2401 001363 GND30 11 75V DGND 16V 470uF 5V 0 R6 GND30 100 R48 C152 100nF 22pF C71 47nF C36 R53 1K GND12 D1 SS26 GND30 100 R68 GND30 30VB 100 R69 1nF C21 2203 000440 47nF C14 22...

Page 103: ...R2 1000nF C104 100nF C94 3 3V R118 1K 0 5 100nF BD8 C178 0 R119 1 TP33 1 TP26 MC74VHC32DR2 U18 3 1TP236 16V C127 10uF 100nF DGND C179 OA 980 U21 R116 4 7K DGND 100nF DGND C142 16V 10uF C129 3 3V 5V 3 3V TP25 1 TP457 C176 10uF 16V C153 DGND C163 100nF 100nF TP28 1 10uF 16V C107 DGND DGND 74VHC27 U3 3 TP458 10uF 47K R97 100nF C106 TP31 1 DGND 5VA TP269 1 DGND TP27 1 DGND DGND U27 K4S641632C R128 4 7...

Page 104: ...MSD914T1 D7 DGND C155 100nF 27pF C122 1nF C166 10K R114 AGND DGND DGND 100nF C199 1nF C175 C149 100nF C134 5V 100nF C135 1nF 11 75VA 100nF C183 100nF C169 8 2K R129 AGND C132 100nF 1nF C189 R109 10K 10K R113 5V C170 100nF C138 22uF 16V R165 10K C145 AGND 100nF 11 75VA 150K R162 C174 100nF 3 0V R121 10K 330K R131 R372 10K AGND C133 100nF R158 1M C173 100nF 1M R379 DGND 16V 22uF C150 AGND R112 10K 1...

Page 105: ... 1 3 B C PARALLEL PORT PART SIGN 4 DGND 5V 100nF C192 C191 100nF 3 3V DGND U26 TC74LVX4245MTCX 3 3V HIC1 SUPER1284 RA8 39 100nF C195 5V U33 TC74LVX4245MTCX C190 100nF 5V 100nF C207 DGND DGND RA7 39 CD 2 CD 3 _P_STB _P_ACK P_BUSY P_PE P_SLCT _P_ERROR VOL_00 VOL_10 VOL_20 VOL_2 VOL_1 VOL_0 DGND CD 1 CD 0 _STB _INIT _ERROR _SLCTIN _AUTOFD SLCT PE BUSY _ACK _P_SLCTIN _P_AUTOFD 245DIR PD 0 7 PD 0 PD 1 ...

Page 106: ...6 MMSD914T1 D3 5V scroll volume_down power R7 22K GND5 5V GND5 5V GND5 U1 HT48R50 22K R5 CN2 4 CN2 5 special scroll volume_up CN1 8 GND5 GND5 zoomrete CN1 7 scan to CN1 6 GND5 CN1 5 GND5 16V 10uF C1 CN2 1 CN1 4 GND5 GND5 ink CN1 3 3 1 CN1 2 2 GND5 CN1 1 1 3 2 R8 22K Q2 2SC2812L6 TA 1 3 2 KSA1182 Y Q1 MMSD914T1 D1 5V SLS NNGR202TS LED1 5V R24 150 22K R23 C13 10uF 16V R20 1 5K MMSD914T1 D2 180K R19 ...

Page 107: ...24 C3 222 2KBP06M DSC10D9 C5 400V120uF R3 1 4W 180K SSP5N80A C6 1KV331 R5 47K R4 1W0 42 MINI Q3 C1008 Y C8 103 D2 1N4148 PC1 PC123B ZD2 4 3VB C13 10V1000uF R14 6 8K R13 510 R15 6 8KF C10 1uF PC123B Magic V3 POWER SUPPLY 100 240Vac KA78R33 R10 330 Q4 C1008 C7 PC630V103 Q1 X 3 4 1 2 10 C4 222 C2 104 R2 1 4W180K Q2 FQU2N60 ZD1 9 1V C9 103 R6 510 R11 180 D1 1N4148 D3 1N4148 R8 330 R7 3 3KF R9 33 B1 BE...

Page 108: ...Electronics ...

Page 109: ... Electronics Digital Printing CS Group Copyright c 2001 10 This manual is made and described centering around circuit diagram and circuit description needed in the repair center in the form of appendix SAMSUNG ...

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