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Samsung SCR-3232 Service Manual
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Samsung SCR-3232 Service Manual

Samsung SCR-3232 Service Manual

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SCR - 3232
Model
:
CD-ROM
service
manual
CONTENTS
n Specifications
n Cautions at Service
n External Part Name
n Disassembly Method
n Exploded Views
n Device Part List
n Packing Options
n Operational Position Diagram
n CD-ROM Block Diagram
n Troubleshooting
n Circuit Diagram
32X
n Main Components Block Diagram & Pin
Descriptions
n Electrical Parts List
v 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 SCR-3232

  • Page 1 SCR - 3232 Model CD-ROM service manual CONTENTS n Specifications n Cautions at Service n External Part Name n Disassembly Method n Exploded Views n Device Part List n Packing Options n Operational Position Diagram n CD-ROM Block Diagram n Troubleshooting n Circuit Diagram n Main Components Block Diagram &...
  • Page 2 Electronics © Samsung Electronics Co., Ltd. JULY, 1998 Printed in Korea Code No: BG68-20312A...

  • Page 3: Specifications

    n Specifications 1. General Specifications - Frequency response : 20Hz~20KHz - Drive type : Computer built-in - Signal to noise ratio : 75dB(1KHz, Lineout) - Power consumption : DC + 5V, 1A - Distortion factor : 0.15% Less than(1KHz) DC + 12V, 1.5A - Channel separation : 65dB(1KHz, Lineout) - Dimensions : 149mm(W)X41.5mm(L)X202.6mm(H) - Signal output level : LINEOUT : 0.7 Vrms(±20%)
  • Page 4 n Specifications 1. General Specifications - Frequency response : 20Hz~20KHz - Drive type : Computer built-in - Signal to noise ratio : 75dB(1KHz, Lineout) - Power consumption : DC + 5V, 1A - Distortion factor : 0.15% Less than(1KHz) DC + 12V, 1.5A - Channel separation : 65dB(1KHz, Lineout) - Dimensions : 149mm(W)X41.5mm(L)X202.6mm(H) - Signal output level : LINEOUT : 0.7 Vrms(±20%)

  • Page 5: External Part Name

    n External Part Name 1.Front Emergency HOLE Up/Down Volume Earphone jack Disc tray Stop/Open button Play/Search button 2.Rear Master/Slave select pin Power terminal Sound output terminal Interface terminal Digital output terminal (Optional)

  • Page 6: Disassembly Method

    n Disassembly Method 1. COVER BOTTOM ASSY disassembly Remove 4 screws(23) on the bottom of COVER BOTTOM ASSY, lift the back up and disassemble COVER BOTTOM ASSY as Figure Page 4. 2. COVER-TOP disassembly After disassembling 4 hooks of FRONT ASSY(2) from COVER TOP(1), pull COVER TOP(1) forward and disassemble it.
  • Page 7 n Operational Position Diagram...
  • Page 9 n Operational Position Diagram...

  • Page 11: Troubleshooting

    n Troubleshooting Equipments required at repair 1. Oscilloscope(100MHz and more) 2. PROBE for Oscilloscope(10:1) 3. PC(486 and more) Verify the circuit of power unit and the first status(Plug-in the power cable without I/F cable and verify.) +5V, +12V of CN700 is normally inputted after Check power short and power supply cable Replace IC308 connection of power cable?
  • Page 12 v FPC : Flexible Printed Circuit No tray open/close Start FPC is normally inserted in CN502? Retest after inserting FPC in CN502 properly IC301 49pin is 0V at pressing SW301? Check SW301 pattern and soldering Replace SW301 After FPC short check, no error, check SW soldering of deck CN502 16pin FPC of CN502 is normally inserted? IC301 35pin is 0V with tray in?
  • Page 13 No laser on Open and close tray(Disc insettion) Refer to ‘No tray open/close’ IC101 10pin changes from 0V to +3.3V? Refer to ‘Check power source and initial state’ IC101 9pin changes from 4.2V to 3.8V? Check IC101 power input and replace. CN501 3pin changes from 2V to 2.5V? Check D101, L101, Q102, R102, C103 soldering CN501 2pin changes from 0V to 0.7V?
  • Page 14 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' IC201 47Pin? Check R511, R512 The below signal is inputted Voltage of IC501 21pin in 12V? soldering.
  • Page 15 No focus lock Insert disc Laser diode is on? VNOTE : NEVER CHECK 'LASER DIODE Refer to 'Check power source The below waveform is outputted in IC201 Refer to 'No laser diode on' Focus up/down? and initial state' ON' STATE DIRECTLY WITH YOUR EYES 42Pin? AND RECOGNIZE IT BY SIGNAL INDICATED IN 'NO LASER DIODE ON' OF...
  • Page 16 No spindle motor rotation Insert disc. Focus lock? Refer to 'No focus lock' The side waveform is inputted in IC502 2Pin? The below waveform is inputted in IC502 21Pin? Spindle motor kick signal Check IC201 power input and 49Pin soldering. Check R207, C221 soldering and pattern Replace IC201 CN502 8Pin is 3V?
  • Page 17 No audio output Insert audio disc. Focus lock? Refer to 'No focus lock' Spindle Motor rotates? Refer to 'No Spindle Motor rotation' Solder SW302 IC301 50Pin is 0V at pressing SW302? 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 18 When installing is impossible Connect power and I/F cable between PC and CD-ROM Does INSTALL message appear? Normal Is IC301 64PIN 5V when main power turns on? Check main power-end and initial state Is IC201 95PIN 5V? Does X301 oscillate? Check soldering of C303, C304 Do the digital signal of IC301 and IC306 Check the soldering of IC402, IC301...

  • Page 19: Packing Options

    BOX SYSTEM BG69-50015A SW-E MANILA 400g CUSHION-SET BG69-20003A EPE WHITE PE-BAG BE69-30304A T0.1X270X260 ANTI INSTALL-DISK BG46-30001J SHARED W/ SCR-3230 CBF-HARNESS BG39-40010A 4P, 500mm PE-BAG BE69-30304A T0.1X270X260 ANTI MANUAL-USERS BG68-10010A CD-ROM(Korean) MANUAL-USERS BG68-10011A CD-ROM(Eng/Ger) CABLE-IF BG39-30002A 40 Pin I/F Cable SCR-3232...
  • Page 20 CODE NO PARTS SPEC LOCATION NO Q’TY 0903-000006 IC-MICRO CONTROLLER KS88C4400 IC301 1102-001024 PROM AT27C512R IC306 1201-001231 RF-AMP TA2119FN IC101 BG14-10001H IC SIGNAL PROCESSOR TC9450F IC201 0904-001237 IC-CONTROLLER TC9466FA IC401 1003-001068 IC MOTOR DRIVER BA6849FP IC502 1003-001130 IC 4-CH DRIVER KA3012D IC501 1203-001005...
  • Page 21 R-CHIP-2 CODE NO PARTS SPEC LOCATION NO Q’TY R-CHIP 2.4 Kohm R118 2007-000082 R-CHIP 3.3 Kohm R203,204,207 2007-000084 R-CHIP 4.7 Kohm R305,312,313,317,319,320,321,323,324,325 2007-000962 R-CHIP 5.1 Kohm R528 2007-000090 R-CHIP 10 Kohm R121,272,280,304,315,316,331,332,432,433, 438,439,440,442,443,717,718 2007-000091 R-CHIP 12 Kohm R121,272 2007-000458 R-CHIP 18 Kohm R276 2007-000094...
  • Page 22 C-CHIP (continued) CODE NO PARTS SPEC LOCATION NO Q’TY 2203-001402 C-CERAMIC 220 nf C112 2203-000919 C-CERAMIC 470 nf C510,511,512 2203-001083 C-CERAMIC 5 pf C303,304 2203-001618 C-CERAMIC 27 pf C401,402 2203-001636 C-CERAMIC 33 pf C110 2203-001697 C-CERAMIC 82 pf C701,706 2203-001656 C-CERAMIC 470 pf C262...
  • Page 23 n CD-ROM Block diagram MAIN PCB DRIVE SECTION CONTROLLER SECTION SPINDLE KICK/BRAKE SPINDLE DRIVER BA6849FP SLED DRIVER LOAD/EJECT DRIVER ACTURATOR DRIVER KA3012D PROM AT27C512R 5/12V POWER KS88C4400 20MHz CERAMIC B.L SPINDLE MOTOR BRUSH SLED MOTOR OPTICAL PICKUP DRIVING MECHANISM HOST CONTROLLER CD-ROM DECODER SUB CODE...
  • Page 24 n Main Components Block Diagram and Pin Descriptions • KS88C4400 MICROCONTROLLER P0.1/A9 RESET P0.0/A8 P5.7 P5.6 (int.) P5.5 P5.4 P5.3 P6.0 P5.2 P6.1 P5.1 P6.2 P5.0 P6.3 (ext.) P6.4 KS88C4400 P6.5 P2.7/TB P2.6/TA P6.6 80-QFP P6.7 (TOP VIEW) P7.7/ADC7 P2.3/DM P7.6/ADC6 P2.2/DW P7.5/ADC5...
  • Page 25 MICOM PIN DESCRIPTIONS NAME FUNCTION NAME FUNCTION ADDRESS LINE TEST_P1 PRODUCTION TEST PIN 0 ADDRESS LINE AVref CVCC /XCE MICOM INTERFACE CHIP ENABLE TEST_P2 PRODUCTION TEST PIN 1 /XCM MICOM INTERFACE FIRST WORD ENABLE TEST_P3 PRODUCTION TEST PIN2 /XRD MICOM INTERFACE READ SIGNAL Avss GROUND /XWR...

  • Page 26: Top View

    • TC9466F QFP PIN DIAGRAM 75 74 72 71 68 67 66 64 63 62 61 59 58 54 53 SBSY ASCK SFSY SBDI DASP CLCK SBOK HCS3 C2PI HCS1 LRCK PDIAG BCKI IOCS16 TOP VIEW INTRQ HDAK CSEL IORDY HDRQ HD15 HD14...

  • Page 27: Pin Descriptions

    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 TEST TERMINAL KINT INTERRUPT REQUEST OUTPUT...
  • Page 28 • TC9450F (DSP CHIP) 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 SPCK SPDA DECODER COFS SUBCODE...
  • Page 29 PIN DESCRIPTIONS DESCRIPTIONS DESCRIPTIONS NAME NAME 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 DIGITAL DATA OUTPUT TERMINAL FLGB INTERNAL SIGNAL CHECKING FLAG TERMINAL...
  • Page 30 • TA2119FN 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 238k I(3/4) I(3/4) RFGO I - I I(1/4) GVSW AGCIN AGC-AMP GMAD...
  • Page 31 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 LASER DIODE AMP OUTPUT TERMINAL...
  • Page 32 • KA3012D PIN DESCRIPTIONS Pin No. Symbol Description CH1-O Drive CH1 Output(-) CH1-O Drive CH1 Output(+) AMP1-O OP-AMP CH1 Output AMP1-I(-) OP-AMP CH1 Input(-) AMP1-I(+) OP-AMP CH1 Input(+) BIAS Bias Input SVCC Supply Voltage(Signal) Ground MUTE Mute AMP2-1(+) OP-AMP CH2 Input(+) AMP2-1(-) OP-AMP CH2 Input(-) CC1/...
  • Page 33 • AT27PC512 PLCC Top View Pin Name Function A15 VCC A13 A12 NC A0-A15 Addresses O0-O7 Outputs Chip Enable OE/VPP OE/Vpp Output Enable/Vpp No Connect O1 GND Mode/Pin OE/V Outputs DATA OUTPUTS Read O0-O7 Output Disable High Z Standby High Z OE, CE AND OE/VPP OUTPUT...
  • Page 34 • KSC 1623 (2SC 2412K) • NJM3414M V1(5V) A OUTPUT 1 A-INPUT 2 B OUTPUT A+INPUT 3 B-INPUT 5 B+INPUT • GD74VHCT00 INPUTS OUTPUT 1Y 3 2Y 5 3Y 8 H=HIGH voltage level L=Low voltage level 4Y 11 • XC61AC3502MR •...
  • Page 35 • PQ20VZ51 • Pin configuration Pin No Pin Name • DC input(VIN) ‚ ON/OFF control 20VZ51 terminal(VC) ƒ DC output(VO) Spesific IC „ Output voltage minute adjustment terminal(VADJ) …...
  • Page 36 Circuit Diagram...