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Samsung SC-140 Service Manual
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Samsung SC-140 Service Manual

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SC - 140
Model
:
CD-ROM
service
manual
CONTENTS
¥ Specifications
¥ Cautions at Service
¥ External Part Name
¥ Disassembly Method
¥ Exploded Views
¥ Device Part List
¥ Packing Options
¥ Operational Position Diagram
¥ Block Diagram
¥ Troubleshooting
¥ Circuit Diagram
40X
¥ Main Components Block Diagram & Pin
Descriptions
¥ Electrical Parts List
The design and part of this product is subject to change without prior notice for performance improvement.

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Summary of Contents for Samsung SC-140

  • Page 1 SC - 140 Model CD-ROM service manual CONTENTS ¥ Specifications ¥ Cautions at Service ¥ External Part Name ¥ Disassembly Method ¥ Exploded Views ¥ Device Part List ¥ Packing Options ¥ Operational Position Diagram ¥ Block Diagram ¥ Troubleshooting ¥...
  • Page 2 Electronics Samsung Electronics Co., Ltd. © MARCH, 1999 Printed in Korea Code No.: BG68-00045A...
  • Page 3 SCR-140(A4)-en 99.3.15 11:20 AM ˘ ` 2 External Part Name 1.Front Up/Down Volume Earphone jack Disc tray Stop/Open button Emergency HOLE 2.Rear Master/Slave select pin Power terminal Sound output terminal Interface terminal Digital output terminal (Optional)

  • Page 4: Specifications

    SCR-140(A4)-en 99.3.15 8:30 AM ˘ ` 1 Specifications 1. General Specifications - Frequency response : 20Hz~20KHz (Limeout) - Drive type : Computer built-in 100Hz~20KHz (H/pout) - Power consumption : DC + 5V, 1.7A - Signal to noise ratio : 75dB(1KHz, Limeout) DC + 12V, 1.0A 65dB(1KHz, H/pout) - Dimensions : 149mm(W)X41.5mm(H)X202.6mm(L)
  • Page 5 SCR-140(A4)-e n 99.3.1 5 8:3 6 AM Æ Á 3 Disassembly Method 1. COVER BOTTOM ASSY disassembly Remove 4 screw s on the bottom of COVER BOTTOM ASSY, lift the back up and disassemble 31COVER BOTTOM ASSY as shown in the figure of the next page. 2.
  • Page 6 SCR-140(A4)-en 99.3.15 8:45 AM ˘ ` 14 Main Components Block Diagram and Pin Descrition ‹ TA2140FN(I.C-RF) 20µA 100k SBAD 150k 16.7k VDDIN 150k VREF 50µA 3 STATE RFRP 100k SW1 LDC 2.9k 100k RFCT 1.4k 100k 238k 2.26k BOTTOM I(1/4) RERPIN I - I PEAK...

  • Page 7: Scr-140(A4)-En 99.3.15 8:46 Am

    SCR-140(A4)-en 99.3.15 8:46 AM ˘ ` 15 PIN DESCRIPTIONS PIN NO PIN NAME FUNCTION POWER SOURCE/VOLTAGE TERMINAL RFGC RF FREQUENCY CONTROL SIGNAL INPUT TERMINAL GMAD OPEN-LOOP GAIN CONTROL TERMINAL OF AGC AMP MAIN BEAM AMP INPUT TERMINAL MAIN BEAM AMP INPUT TERMINAL SUB BEAM AMP INPUT TERMINAL SUB BEAM AMP INPUT TERMINAL MONITOR PHOTO-DIODE AMP INPUT TERMINAL...

  • Page 8: Table Of Contents

    SCR-140(A4)-en 99.3.15 8:46 AM ˘ ` 16 ‹ TC9450AF(I.C-DSP) VSS3 XVDD3 AOUT MICOM DA COUNTER XVSS3 DOUT INTERFACE AUDIO MBOV TEST2 TEST1 CLOCK SBOK TEST0 ERROR GENERATOR CLOCK CORECTION TESIN VDD3 TESTIO1 VSS5 FGIN DIGITAL DATA DACT 16K RAM CKSE SFSY DMOUT SBSY...
  • Page 9 SCR-140(A4)-en 99.3.15 8:47 AM ˘ ` 17 PIN DESCRIPTIONS SYMBOL DESCRIPTIONS SYMBOL DESCRIPTIONS VSS3 DIGITAL GND TERMINAL VDD3 DIGITAL +3.3V POWER SOURCE TERMINAL BIT CLOCK OUTPUT TERMINAL (1.411MHz) AUTO POWER CONTROL ON/OFF SIGNAL OUTPUT TERMINAL AOUT AUDIO DATA OUTPUT TERMINAL FLGA INTERNAL SIGNAL CHECKING FLAG TERMINAL DOUT...
  • Page 10 SCR-140(A4)-en 99.3.15 8:47 AM ˘ ` 18 ‹ KS88C4504-12(I.C-MICOM) EXTERNAL ADDRESS/DATA A8-A15 A0-A7 D0-D7 External Interface Block RESET P0.0-P0.3 P0.4-P0.7/ Port 0 SAM8 BUS P5.1 ADC0-ADC3 Port 5 P530(WAIT) Port I/O Watchdog & Interrupt Port 4/ timer Chip Control P4.0-P4.7/ P1.0-P1.4 selection CS0-CS4...
  • Page 11 SCR-140(A4)-en 99.3.15 8:48 AM ˘ ` 19 PIN DESCRIPTIONS NO ORIGIN NAME FUNCTION ORIGIN NAME FUNCTION EXT PROM CHIP ENABLE P1.4 PRODUCT TEST PINO /UCS INTERFACE CHIP SELECT P1.3 PRODUCT TEST PIN1 /RD7 /URD INTERFACE CHIP READ P1.2 PRODUCT TEST PIN2 /UWR INTERFACE CHIP WRITE P1.2...
  • Page 12 SCR-140(A4)-en 99.3.15 8:49 AM ˘ ` 20 ‹ TC9474FA(I.C-DECODER) 75 74• 73• 72 71 70 69• 68• 67 66• 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 SBSY ABCK SFSY SBDI /DASP CLCK C2PI /HCS3 LRCK...

  • Page 13: Aout

    SCR-140(A4)-en 99.3.15 11:40 AM ˘ ` 21 PIN DESCRIPTIONS SYMBOL DESCRIPTIONS SYMBOL DESCRIPTIONS MICOM ADDRESS INPUT POWER SOURCE TERMINAL MICOM ADDRESS INPUT POWER SOURCE TERMINAL MICOM ADDRESS INPUT GROUND TERMINAL MICOM READ SIGNAL INPUT TEST0 TEST TERMINAL MICOM WRITE SIGNAL INPUT TEST1 TEST TERMINAL CHIP ENABLE SIGNAL INPUT...
  • Page 14 SCR-140(A4)-en 99.3.15 8:49 AM ˘ ` 22 ‹ TA8493AF(I.C-DRIVE) La(G) Lb(G) Lc(G) PWM Signal Vref Stand by Mode Select Short Brake GND1 GND2...
  • Page 15 SCR-140(A4)-en 99.3.15 8:50 AM ˘ ` 23 ‹ 7S32(I.C-OR GATE) OUTX ‹ 4S66F(I.C-SWITCH) IN/OUT OUT/IN IN/OUT 1 OUT/IN 2 V SS CONT CONTROL ‹ PQ20WZ51(I.C-REGULATOR) Pin No Pin Name DC input(VIN) ON/OFF control 20VZ51 terminal(VC) DC output(VO) Spesific IC Output voltage minute adjustment terminal(VADJ) G N D...
  • Page 16 SCR-140(A4)-en 99.3.15 8:51 AM ˘ ` 24 ‹ 29EE512-70(I.C-FLASH MEMORY) - PIN DESCRIPTION Symbol Pin Name Functions A15-A7 Row Address Inputs To provide memory addresses. Row addresses define a page for a write cycle. A6-A0 Column Address Inputs Column Addresses are toggled to load page data. DQ7-DQ0 Data Input/output To output data during read cycles and receive input data during write cycles.

  • Page 17: Dout

    SCR-140(A4)-en 99.3.15 11:34 AM ˘ ` 25 ‹ M56788FP(I.C-DRIVE) CH3IN REG+ OUT3 REGB IN3- IN1+ VBS2 VBS1 IN1- OUT1 VM1- IN3+ VM3+ VM1+ VM3- VM2+ VM4+ VM2- VM4- OUT2 VM5+ VM5- IN2- OUT5 IN2+ IN5- MUTE1 IN5+ MUTE2 IN4+ SS.GND IN4- VREF OUT4-...
  • Page 18 SCR-140(A4)-en 99.3.15 8:52 AM ˘ ` 26 PIN ASSIGNMENT TERMINAL TERMINAL FUNCTION REMARKS SYMBOL L b (G) b-phase upper side power transistor Keep open. (base)output terminal L a (G) a-phase upper side power transistor Keep open. (base)output terminal a-phase output terminal Connect to the coil.
  • Page 19 SCR-140(A4)-en 99.3.15 8:45 AM ˘ ` 14 Main Components Block Diagram and Pin Descrition ‹ TA2140FN(I.C-RF) 20µA 100k SBAD 150k 16.7k VDDIN 150k VREF 50µA 3 STATE RFRP 100k SW1 LDC 2.9k 100k RFCT 1.4k 100k 238k 2.26k BOTTOM I(1/4) RERPIN I - I PEAK...
  • Page 20 SCR-140(A4)-en 99.3.15 8:46 AM ˘ ` 15 PIN DESCRIPTIONS PIN NO PIN NAME FUNCTION POWER SOURCE/VOLTAGE TERMINAL RFGC RF FREQUENCY CONTROL SIGNAL INPUT TERMINAL GMAD OPEN-LOOP GAIN CONTROL TERMINAL OF AGC AMP MAIN BEAM AMP INPUT TERMINAL MAIN BEAM AMP INPUT TERMINAL SUB BEAM AMP INPUT TERMINAL SUB BEAM AMP INPUT TERMINAL MONITOR PHOTO-DIODE AMP INPUT TERMINAL...

  • Page 21: Mbov

    SCR-140(A4)-en 99.3.15 8:46 AM ˘ ` 16 ‹ TC9450AF(I.C-DSP) VSS3 XVDD3 AOUT MICOM DA COUNTER XVSS3 DOUT INTERFACE AUDIO MBOV TEST2 TEST1 CLOCK SBOK TEST0 ERROR GENERATOR CLOCK CORECTION TESIN VDD3 TESTIO1 VSS5 FGIN DIGITAL DATA DACT 16K RAM CKSE SFSY DMOUT SBSY...
  • Page 22 SCR-140(A4)-en 99.3.15 8:47 AM ˘ ` 17 PIN DESCRIPTIONS SYMBOL DESCRIPTIONS SYMBOL DESCRIPTIONS VSS3 DIGITAL GND TERMINAL VDD3 DIGITAL +3.3V POWER SOURCE TERMINAL BIT CLOCK OUTPUT TERMINAL (1.411MHz) AUTO POWER CONTROL ON/OFF SIGNAL OUTPUT TERMINAL AOUT AUDIO DATA OUTPUT TERMINAL FLGA INTERNAL SIGNAL CHECKING FLAG TERMINAL DOUT...
  • Page 23 SCR-140(A4)-en 99.3.15 8:47 AM ˘ ` 18 ‹ KS88C4504-12(I.C-MICOM) EXTERNAL ADDRESS/DATA A8-A15 A0-A7 D0-D7 External Interface Block RESET P0.0-P0.3 P0.4-P0.7/ Port 0 SAM8 BUS P5.1 ADC0-ADC3 Port 5 P530(WAIT) Port I/O Watchdog & Interrupt Port 4/ timer Chip Control P4.0-P4.7/ P1.0-P1.4 selection CS0-CS4...
  • Page 24 SCR-140(A4)-en 99.3.15 8:48 AM ˘ ` 19 PIN DESCRIPTIONS NO ORIGIN NAME FUNCTION ORIGIN NAME FUNCTION EXT PROM CHIP ENABLE P1.4 PRODUCT TEST PINO /UCS INTERFACE CHIP SELECT P1.3 PRODUCT TEST PIN1 /RD7 /URD INTERFACE CHIP READ P1.2 PRODUCT TEST PIN2 /UWR INTERFACE CHIP WRITE P1.2...
  • Page 25 SCR-140(A4)-en 99.3.15 8:49 AM ˘ ` 20 ‹ TC9474FA(I.C-DECODER) 75 74• 73• 72 71 70 69• 68• 67 66• 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 SBSY ABCK SFSY SBDI /DASP CLCK C2PI /HCS3 LRCK...

  • Page 26: Clock

    SCR-140(A4)-en 99.3.15 11:40 AM ˘ ` 21 PIN DESCRIPTIONS SYMBOL DESCRIPTIONS SYMBOL DESCRIPTIONS MICOM ADDRESS INPUT POWER SOURCE TERMINAL MICOM ADDRESS INPUT POWER SOURCE TERMINAL MICOM ADDRESS INPUT GROUND TERMINAL MICOM READ SIGNAL INPUT TEST0 TEST TERMINAL MICOM WRITE SIGNAL INPUT TEST1 TEST TERMINAL CHIP ENABLE SIGNAL INPUT...
  • Page 27 SCR-140(A4)-en 99.3.15 8:49 AM ˘ ` 22 ‹ TA8493AF(I.C-DRIVE) La(G) Lb(G) Lc(G) PWM Signal Vref Stand by Mode Select Short Brake GND1 GND2...

  • Page 28: Vdd3

    SCR-140(A4)-en 99.3.15 8:50 AM ˘ ` 23 ‹ 7S32(I.C-OR GATE) OUTX ‹ 4S66F(I.C-SWITCH) IN/OUT OUT/IN IN/OUT 1 OUT/IN 2 V SS CONT CONTROL ‹ PQ20WZ51(I.C-REGULATOR) Pin No Pin Name DC input(VIN) ON/OFF control 20VZ51 terminal(VC) DC output(VO) Spesific IC Output voltage minute adjustment terminal(VADJ) G N D...

  • Page 29: Vss5

    SCR-140(A4)-en 99.3.15 8:51 AM ˘ ` 24 ‹ 29EE512-70(I.C-FLASH MEMORY) - PIN DESCRIPTION Symbol Pin Name Functions A15-A7 Row Address Inputs To provide memory addresses. Row addresses define a page for a write cycle. A6-A0 Column Address Inputs Column Addresses are toggled to load page data. DQ7-DQ0 Data Input/output To output data during read cycles and receive input data during write cycles.

  • Page 30: Data

    SCR-140(A4)-en 99.3.15 11:34 AM ˘ ` 25 ‹ M56788FP(I.C-DRIVE) CH3IN REG+ OUT3 REGB IN3- IN1+ VBS2 VBS1 IN1- OUT1 VM1- IN3+ VM3+ VM1+ VM3- VM2+ VM4+ VM2- VM4- OUT2 VM5+ VM5- IN2- OUT5 IN2+ IN5- MUTE1 IN5+ MUTE2 IN4+ SS.GND IN4- VREF OUT4-...
  • Page 31 SCR-140(A4)-en 99.3.15 8:52 AM ˘ ` 26 PIN ASSIGNMENT TERMINAL TERMINAL FUNCTION REMARKS SYMBOL L b (G) b-phase upper side power transistor Keep open. (base)output terminal L a (G) a-phase upper side power transistor Keep open. (base)output terminal a-phase output terminal Connect to the coil.

  • Page 32: Troubleshooting

    SCR-140(A4)-en 99.3.15 8:38 AM ˘ ` 7 Equipments required at repair Troubleshooting 1. Oscilloscope(100MHz or more ) 2. PROBE for Oscilloscope(10:1) 3. PC(486 ormore) Verify the circuit of power unit and the first status(Plug-in the power cable without I/F cable and verify.) +5V, +12V of CN701 is normally inputted after Check power short and power supply cable connection of power cable?

  • Page 33: Cofs

    SCR-140(A4)-en 99.3.15 8:39 AM ˘ ` 9 FPC : Flexible Printed Circuit No tray open/close Start FPC is normally inserted in CN702? Retest after inserting FPC in CN702 properly IC301 48pin is 0V at pressing SW701? Check SW701 pattern and soldering Replace SW701 After FPC short check, no error, check SW soldering of deck CN502 16pin...
  • Page 34 SCR-140(A4)-en 99.3.15 8:40 AM ˘ ` 10 No laser on Open and close tray(Disc insettion) Refer to ÔNo tray open/closeÕ IC101 10pin changes from 0V to +3.3V? Refer to ÔCheck power source and initial stateÕ IC101 9pin changes from 4.2V to 3.6V? Check IC101 power input and replace.
  • Page 35 SCR-140(A4)-en 99.3.15 9:48 PM ˘ ` 1 No SLED operation Move pick-up out. Insert 2 FPC and power cord. Pick-up moves in? SLED runs normally. The below waveform is outputted in Refer to 'Check power source and initial state' IC301 22Pin, 23pin ? Voltage of IC501 4pin ,5pin Check R506, R507, The below signal is inputted...
  • Page 36 SCR-140(A4)-en 99.3.15 7:51 PM ˘ ` 11 No spindle motor rotation Insert disc. Focus lock? Refer to 'No focus lock' The below waveform is Refer to 'No focus lock' inputted in IC502 22Pin? Spindle motor kick signal IC502 4Pin, 29pin is 12V? Check IC301 38pin soldering IC502 5Pin is 5V? Check R323 soldering...
  • Page 37 SCR-140(A4)-en 99.3.15 11:37 AM ˘ ` 12 No audio output Insert audio disc. Focus lock? Refer to 'No focus lock' Spindle Motor rotates? Refer to 'No Spindle Motor rotation' Audio signal is outputted in Replace IC201 Check IC201 power and soldering. IC201 77, 80Pin? Audio signal is outputted in Check IC701 power input and...
  • Page 38 SCR-140(A4)-en 99.3.15 11:37 AM ˘ ` 13 When installing is impossible Connect power cable and I/F cable between PC and CD-ROM Does INSTALL message appear? Normal Is IC301 46PIN 5V when main power turns on? Check main power-end and initial state Is IC201 95PIN 5V? Does X401 oscillate? Check soldering of C401, C402...
  • Page 39 SCR-140(A4)-e n 99.3.1 5 8:3 6 AM Æ Á 4 Exploded Views...
  • Page 40 SCR-140(A4)-en 99.3.15 8:37 AM ˘ ` 5 Device Part List P P A A R R T T S S S S P P E E C C F F I I C C A A T T I I O O N N C C O O U U N N T T C C o o d d e e FULL DESK ASSY...
  • Page 41 SCR-140(A4)-en 99.3.15 8:53 AM Æ Á 27 Electrical parts List SC-140B MAIN PCB 1201-001399 IC101 TA2140FN 0904-001306 IC201 TC9450AF 1203-001500 IC202 PQ20WZ51 1001-001003 IC206 TC4S66F 0903-001149 IC301 KS88P4504 1103-001144 IC304 29EE512-70 0801-002143 IC310 7S32 1005-001006 IC401 TC9474FA 1003-001221 IC501 M56788FP 1003-001227 IC502 TA8496AF...
  • Page 42 SCR-140(A4)-en 99.3.15 8:54 AM ˘ ` 28 C-CHIP N N O O C C O O D D E E N N O O L L O O C C A A T T I I O O N N N N O O S S P P E E C C 2203-000189...
  • Page 43 SCR-140(A4)-en 99.3.15 8:54 AM ˘ ` 29 R-CHIP N N O O C C O O D D E E N N O O L L O O C C A A T T I I O O N N N N O O S S P P E E C C 2007-000070...
  • Page 44 SCR-140(A4)-en 99.3.15 8:54 AM ˘ ` 30 R-CHIP N N O O C C O O D D E E N N O O L L O O C C A A T T I I O O N N N N O O S S P P E E C C 2007-000090...
  • Page 45 SCR-140(A4)-en 99.3.15 8:55 AM ˘ ` 31 R-CHIP N N O O C C O O D D E E N N O O L L O O C C A A T T I I O O N N N N O O S S P P E E C C 2007-000097...
  • Page 46 SCR-140(A4)-en 99.3.15 8:55 AM ˘ ` 32 SC-140B FRONT PCB N N O O C C O O D D E E L L O O C C A A T T I I O O N N P P A A R R T T N N A A M M E E S S P P E E C C 1201-001373...
  • Page 47 B LO C K D IA G R A M PICK-UP RF-AMP HEADPHONE SPINDLE TA2140FN MOTOR SLED MOTOR LOADING MOTOR INTERFACE TC9474FA (TOSHIBA) HOST INNER 1M INTERFACE DRAM TC9450AF (IDE) SPINDLE ACTURATOR DRIVE DRIVE TA8493AF M56788FP ¹ÌÂêºñ½Ã ) (EHTLQKG) SYSTEM CONTROL KS88P4504Q (SAMSUNG) PROM FLASH ROM 512KB 512KB...
  • Page 48 SCR-140(A3) 99.3.15 11:19 AM ˘ ` 4 Operational Position Diagram...
  • Page 49 SCR-140(A3) 99.3.15 9:1 AM ˘ ` 5 Operational Position Diagram...
  • Page 50 SCR-140(A3) 99.3.15 9:1 AM ˘ ` 6 Operational Position Diagram...
  • Page 51 SCR-140(A3) 99.3.15 9:0 AM ˘ ` 3 Circuit Diagram...

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