Samsung MM-28 Service Manual Download

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MICRO COMPONENT
SYSTEM

MM-28

SERVICE

Manual

MICRO COMPONENT SYSTEM

CONTENTS

1. Precautions

2. Specifications

3. Disassembly and Reassembly

4. Alignment and Adjustments

5. Special Circuit Descriptions

6. Troubleshooting

7. Exploded Views and Parts List

8. Electrical Parts List

9. Block Diagrams

10. PCB Diagrams

11. Wiring Diagram

12. Schematic Diagrams

Summary of Contents for MM-28

Page 1: ...TENTS 1 Precautions 2 Specifications 3 Disassembly and Reassembly 4 Alignment and Adjustments 5 Special Circuit Descriptions 6 Troubleshooting 7 Exploded Views and Parts List 8 Electrical Parts List 9 Block Diagrams 10 PCB Diagrams 11 Wiring Diagram 12 Schematic Diagrams ...

Page 2: ...ELECTRONICS Samsung Electronics Co Ltd March 1998 Printed in Korea Code no AH68 20188A ...

Page 3: ...rrent for Appliances and Underwriters Laboratories UL Publication UL1410 59 7 With the unit completely reassembled plug the AC line cord directly into a 120V AC outlet With the unit s AC switch first in the ON position and then OFF measure the current between a known earth ground metal water pipe etc and all exposed metal parts Examples Handle brackets metal cabinets screwheads and control shafts ...

Page 4: ...nplug the unit s AC power cord from the AC power source before attempting to a Remove or reinstall any component or assembly b Disconnect an electrical plug or connector c Connect a test component in parallel with an electrolytic capacitor 3 Some components are raised above the printed circuit board for safety An insulation tube or tape is sometimes used The internal wiring may be clamped to preve...

Page 5: ...ou are ready to install it Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam aluminum foil or other conductive materials 8 Immediately before removing the protective material from the leads of a replacement ESD touch the protective material to the chassis or circuit assembly into which the device will be installed 9 Minimize body motions when h...

Page 6: ...tical Pickup Follow this procedure 2 Place a conductive sheet on the work bench i e the black sheet used for wrapping repair parts Note The surface of the work bench should be covered by a copper ground plane which is grounded 3 The repair technician must wear a wrist strap which is grounded to the copper sheet 4 To remove the Optical Pickup block Place the set on the conductive sheet and momentar...

Page 7: ...se ratio IF rejection ratio Total harmonic distortion Frequency range WOW FLUTTER Erasing effect Signal to noise ratio Total harmonic distortion Frequency response Signal to noise ratio Channel separation Total harmonic distortion Audio Output 125Hz 12 5KHz 0 2 50 dB 40 dB 2 5 20Hz 20KHz 1dB 90 dB 1kHz 75 dB 1kHz 0 1 1kHz 1V 1kHz 0dB Frequency range Usable sensitivity Signal to noise ratio 146 290...

Page 8: ...TIMER ON OFF TIMER CLOCK Remote Control ...

Page 9: ...assembly and Reassembly 3 1 Cabinet Top Cabinet Rear 1 Remove 6 screws of and 7 screws of of its rear part 2 Pull its top part upward vertically as shown in the figure 3 1 Figure 3 1 Samsung Electronics 3 1 ...

Page 10: ...Figure 3 2 3 2 Samsung Electronics 3 2 Main PCB Disassembly and Reassembly 1 Pull out the Main PCB backward horizontally ...

Page 11: ...3 3 Cabinet Bottom 1 Remove 3 screws and pull it out backward 1 Undo 4 screws of and then remove the CD Pack downward Figure 3 3 Figure 3 4 3 4 CD Pack Samsung Electronics 3 3 Disassembly and Reassembly ...

Page 12: ...ter Knob 4 Remove the Center Ring 5 Remove the Spring T Table 6 Remove the Turn Table M 7 Remove 2 screws and then remove the Spindle Motor 8 Remove the Cover Gear by pushing the hook 9 Remove the Gear c by pushing the hook 10 Lift the Gear b 1 11 Remove the Gear a 2 11 Remove 2 screws 3 and the then remove the Feed Motor 4 12 Remove the Chassis Deck M 5 Disassembly and Reassembly 4 6 7 13 2 1 9 1...

Page 13: ...ure 4 2 Maximum output Figure 4 3 Figure 4 2 FM Auto Search Level Adjustment Figure 4 3 AM I F Adjustment Figure 4 1 IF Center and T H D Adjustment SSG FREQ Adjustment point ISVR1 Output 98 MHz BEACON SENSITIVITY SEMI VR 5KΩ 98 MHz FM SSG Output 60 cm VTVM Input Oscilloscope AM SSG 450 KHz AM Antenna Speaker Terminal IN Output GND 26 dB FM SSG Output GND Speaker Terminal FM Antenna Terminal Distor...

Page 14: ...andard Pre Setup Item Step Pre Setup Connection AZIMUTH After putting MTT 113CN into Deck 1 Press FWD PLAY button 2 Press REV PLAY button 1 Figure 4 6 1 Figur4 5 2 Adjust the right control screw to playback Rev Mode Max output and same phase both channels After adjustment secure it with REGION LOCK Remark To Adjust Standard Pre Setup Item Step Pre Setup Connection Adjust Record Bias Level Bias Ins...

Page 15: ...mp and they are added to RF summing Amp The photo diode A B C D signal which is I V changed is outputted by RFO pin74 At this pin the eye pattern can be checked The output of the focus error amp is the difference between RF I V AMP 1 output Va and RF I V AMP 2 output Vb just is the Photo Diode A C B D signal which is I V changed The focus error bias voltage applied to the of focus error amp can be...

Page 16: ...ying the gain of E I V AMP and the tracking gain Pin TE1 can be adjusted automatically by micom program Extracting the DC part of RFI and RFO and comparing with the basic DC level if RF Level is more than basic level the FOK is output The focus OK circuit generates a timing window of focus on to monitor the focus search status of focus serve 79 68 67 F E EI TGFI BAL 4 0 GAIN 3 0 from Digital TGL T...

Page 17: ...al between track on disc ÒHÓ when the defect beyond 1 4ms is detected The time constant for the mirror hold must be sufficiently large than of the traverse signal The EFM comparator converts a RF signal into a binary signal As the asymmertry due to variations in disc manufacturing can not be eilminated by thr AC coupling alone the reference voltage of EFM comparator is controlled utilizing the fac...

Page 18: ... capacitor coupling and shifting the level both signals are compared to generate the mirror defect detection signal As the laser diode has large negative temperature characteristic in its optical output when driven with a constant current on laser diode Therefore the output on processing monitor photo diode must be a controlled current for getting regularly output power thus the APC Auto Power Con...

Page 19: ...eference voltage RFO level is kept stable in 1Vp p and input to EFM Slice The adjustment of audio output gain and the integration of possible de emphasis output are executed by the low pass filter If the control by MUTE signal from micom exist and when input signal absent two channel of right and left is builted in The Center Voltage is generated by using resistor dividing voltage 75 78 76 IRF CAG...

Page 20: ...op During detection of defect the tracking error signal is output through the tracking servo loop after through the low pass filter formed by connecting a capacitor 0 1µF and a built in 470K resistor to the TDFCT pin pin57 in case of tracking phase compensation The value of tracking gain up down can be controlled by TGU and TG2 pin The peak frequency of tracking loop phase compensation the dynamic...

Page 21: ...nthening the filter further The characteristics of high frequency phase compensation in focus tracking servo and the characteristics of cut off frequecny in CLV low pass filter are test by FSET pin The moving of pick up is controlled by tracking servo output through low pass filter The sled kick voltage is output for track jump operation 43 42 44 TM6 TM2 SL SL SLO PS 4 3 0 X1 0 0 X2 1 1 X3 0 1 X4 ...

Page 22: ... Does UX1 12MHz oscillate FRONT PCB POSNS voltage normal pin no 27 5 0V Check the Main PCB RD5 RZD2 RR2 3 4 RC4 Replace µ com Yes Yes Front PCB When the power is ON H displays at pin no 47 5V Yes Connect Front PCB and Main PCB Check the connector Main PCB Wafer JCW2 UCW1 No No No No No Samsung Electronics 6 1 6 Troubleshooting 6 1 Amplifier 6 1 1 Power Malfunction ...

Page 23: ...one Jack short Remove it with Remocon Replace Headphone jack soldering condition Main PCB AIC1 TDA7265 pin no 9 B circuits Check the B power source part in RD1 2 3 4 RC3 Yes Confirm for TR short replace it Yes No No No 6 2 Samsung Electronics Troubleshooting ...

Page 24: ...1 FM AM BAND Switching ok No No 1 Power settion defective 2 LC72131 Oscillator HZ1 7 2MHz ok 3 System line ok Check for µ com IC Replace LC72131 Yes No Yes FM VT LC72131 pin no 20 1 7V 7 5V Check the LC72131 Control ok No Yes Yes Check HIC1 pin 20 No AM VT LC72131 pin no 20 0 9V 7V Check the LC72131 Control ok No No No Yes LPF IL1 IL2 output ok Check TDA7430 function ok Yes Yes Samsung Electronics...

Page 25: ...S IC JIC2 LA2010 BIAS OSC AMPS Oscillate RECORD BIAS 85KHz Convert of P B P B SIGNAL DECK OUTPUT OF IC Check for voltage at pin6 When between songs High Normal When playing song Low Normal Check for voltage at pin5 1 P B Deck H 2 R P Deck L Osc Frequency 85KHz When inoperative JQ5 JQ6 check Check Point ...

Page 26: ...es Is Roulette Control ok No Check Roulette Control Sensor Is Focus Search ok No Check oscillation of NXF100 16 9344MHZ Does Laser function during Focus Search Replace PICK UP Replace NIC9223 or NIC9258 Yes POWER ON Check UP DOWN MOTOR Replace NIC9286 Check NIC9286 pin73 voltage during Focus Search 5V No Yes Yes No No Yes Yes No No Yes Samsung Electronics 6 5 Troubleshooting ...

Page 27: ...nics Troubleshooting Check voltage of NIC05 5V No Check waveform of NIC9223 pin no 12 13 Check NIC9223 soldering Check waveform of NC55R L Replace NIC9223 Check NIC9223 soldering Yes Replace NIC05 Check Amp Malfunction of Audio Output Yes Yes Yes No No ...

Page 28: ...52D AH81 10798V AH81 11052H AH81 10798H AH81 10798J AH81 10798K AH81 10798M AH81 10798N AH81 11052K AH81 10798U DECK CASSETTE MOTOR ASS Y HEAD ASS Y R P SOLENOID ASS Y CNTR ASS Y R P FLYWHEEL ASS Y F FLYWHEEL ASS Y R PINCH ARM F PINCH ARM R CLUTCH ASS Y MAIN BELT R P SUB BELT ADR2110TR2 MM27 28 DC12V EG530AD2B YK56RAA4N3 ADR2100 10 24Ω ADR2110TR2 01 ADR2100 04 ADR2100 05 ADR2100 06 ADR2100 07 ADR2...

Page 29: ...34 Option 7 2 Main Exploded View and Parts List 7 2 1 Exploded View Exploded Views and Parts List 7 2 Samsung Electronics ...

Page 30: ...TTE DAMPER ASSY KNOB VOLUME HOLDER VFD SWITCH LEAF LEVER EJECT CABINET TOP SPRING KNOB CD KNOB CD EJECT SHEET CHUCK CHUCK PLATE DOOR CD WINDOW CD SPRING CD DOOR CAP P U DECK CDP RUBBER CD SHAFT CD CABINET REAR HEAT SINK CABINET BOTTOM RUBBER FOOT REMOCON COVER HIDDEN HIPS 94HB T2 5 BLK PMMA CLEAR MM27 ABS 94HB BLK MM27 AL L28 R200 MM 16 PMMA T2 5 SMOGE MM27 PMMA T2 5 SMOGE MM27 ABS 94HB T3 0 HIPS ...

Page 31: ...H60 10014A DECK CD CHASSIS DECK M COVER GEAR GEAR A GEAR B GEAR C SHAFT PU CENTER RING CENTER KNOB TURN TABLE M PICK UP CDP SPRING T TABLE MOTOR SPINDLE MOTOR FEED SCREW PH M2 3 CMS P30NM6 CMSA30 POM M90 44 CMS V30 BLK ABS CMS V30 M0 3 Z13 SP POM CMS V30 M0 3 Z13 SP POM CMS V30 M0 3 Z16 Z90 SP POM CMS V30 D3 L79 SUS420J2 ABS GS 20 CMS V10N ABS 94HB CMS V30 P U SOH A1 ROW V P J CS STS W PI0 4 D5 7 ...

Page 32: ... 7 8 AH59 90230A AH81 11047A AH81 11047B AH81 11047C AH81 11047D AH81 11047Z AH81 11047H AH81 11047J AH81 11047L SPEAKER SYSTEM NET L NET R CABINET WOOFER SCREW CORD ASS Y CORD CLIP FOOT PS17E MM17 157 X 247 2 X 38 4t 157 X 247 2 X 38 4t W138 5 X H233 5 X D180 5 SG12G33AFA M4 X 10 BLACK Ø0 18 X 20 X 2P X 2 5m Ø11 7X Ø17 X 13t Ø10 X 1 5t 7 4 2 Parts List 3 4 5 1 2 ...

Page 33: ...2203 000199 C CERAMIC CHIP 100nF 80 20 50V Z5U TP NC108 2203 000199 C CERAMIC CHIP 100nF 80 20 50V Z5U TP NC110 2203 000495 C CERAMIC CHIP 2 2nF 10 50V X7R TP 2012 NC111 2203 000802 C CERAMIC CHIP 33nF 10 50V X7R TP 2012 NC112 2203 000260 C CERAMIC CHIP 10nF 10 50V X7R TP 2012 NC113 2203 000260 C CERAMIC CHIP 10nF 10 50V X7R TP 2012 NC115 2203 001137 C CERAMIC CHIP 68NF 80 20 50V Y5V TP 2 NC116 22...

Page 34: ...P 2012 NR101 2007 000593 R CHIP 22ohm 5 1 10W DA TP 2012 NR102 2007 000468 R CHIP 1Kohm 5 1 10W DA TP 2012 NR103 2007 000395 R CHIP 150Kohm 5 1 10W DA TP 2012 NR104 2007 000338 R CHIP 120Kohm 5 1 10W DA TP 2012 NR105 2007 000830 R CHIP 39Kohm 5 1 10W DA TP 2012 NR106 2007 000338 R CHIP 120Kohm 5 1 10W DA TP 2012 NR107 2007 000338 R CHIP 120Kohm 5 1 10W DA TP 2012 NR108 2007 000941 R CHIP 47Kohm 5 ...

Page 35: ...401 000101 DIODE SWITCHING 1N4148 100V 200mA 500mW UD20 0401 000101 DIODE SWITCHING 1N4148 100V 200mA 500mW UQ1 0501 000400 TR SMALL SIGNAL KSC945 L NPN 250MW TO 92 UQ5 0501 000400 TR SMALL SIGNAL KSC945 L NPN 250MW TO 92 UQ6 0501 000610 TR SMALL SIGNAL KSA928A Y PNP 1W TO 92L UQ7 0504 000118 TR DIGITAL KSR1003 NPN 300mW 22K 22K TO UQ8 0501 000610 TR SMALL SIGNAL KSA928A Y PNP 1W TO 92L UQ9 0504 0...

Page 36: ...C CHIP 1nF 10 50V X7R TP 2012 CC1R 2203 001537 C CERAMIC CHIP 1nF 10 50V X7R TP 2012 CR5 2007 000468 R CHIP 1Kohm 5 1 10W DA TP 2012 FC3 2203 000979 C CERAMIC CHIP 47nF 10 50V X7R TP 2012 FC4 2203 000609 C CERAMIC CHIP 22nF 10 50V X7R TP 2012 FR7 2007 000300 R CHIP 10Kohm 5 1 10W DA TP 2012 FR8 2007 000300 R CHIP 10Kohm 5 1 10W DA TP 2012 HC13 2203 000239 C CERAMIC CHIP 100pF 5 50V NPO TP 2012 HC1...

Page 37: ...C CERAMIC CHIP 100nF 80 20 50V Z5U TP QC23 2203 001036 C CERAMIC CHIP 5 6nF 10 50V X7R TP 2012 QC24 2203 000199 C CERAMIC CHIP 100nF 80 20 50V Z5U TP QC25 2203 001137 C CERAMIC CHIP 68NF 80 20 50V Y5V TP 2 QC5L 2203 001036 C CERAMIC CHIP 5 6nF 10 50V X7R TP 2012 QC5R 2203 001036 C CERAMIC CHIP 5 6nF 10 50V X7R TP 2012 QC7L 2203 000609 C CERAMIC CHIP 22nF 10 50V X7R TP 2012 QC7R 2203 000609 C CERAM...

Page 38: ...2 C AL 4 7UF 20 50V TP 6 3X7 5 IC28 2401 001952 C AL 4 7UF 20 50V TP 6 3X7 5 IC29 2301 000453 C FILM PEF 5 6NF 10 50V TP 5 5X7X3MM 5M IC4 2401 001952 C AL 4 7UF 20 50V TP 6 3X7 5 IC5 2401 001968 C AL 470NF 20 50V GP TP 5X11MM 5 IC50 2202 000806 C CERAMIC MLC AXIAL 220PF 10 50V Y5P TP IC53 2202 000807 C CERAMIC MLC AXIAL 22NF 80 20 25V Y5V IC55 2202 000806 C CERAMIC MLC AXIAL 220PF 10 50V Y5P TP IC...

Page 39: ...L AH27 90001B COIL SPRING 2 2uH SPRING AL3R AH27 90001B COIL SPRING 2 2uH SPRING BL1 2 AH27 80060B COIL OSC RBQ 07VB 393UH MW LW RF FJ1 3716 000198 TERMINAL BLOCK NON SOLDER 3P 4mm FP1 AH40 10001T TUNER FE415 G11 75OHM IL1 AH26 10001A TRANS IF FV AD BASE19K 38K LOW PASS FILT IL2 AH26 10001A TRANS IF FV AD BASE19K 38K LOW PASS FILT IL3 AH27 10001K COIL CHOKE 10mH K Q10 CL 3 AH90 10745A ASSY PCB POW...

Page 40: ...MQ1 0501 000398 TR GENERAL KSC945 NPN 60V 50V 150mA 25 MQ2 0501 000398 TR GENERAL KSC945 NPN 60V 50V 150mA 25 MR11 2007 000872 R CHIP 4 7Kohm 5 1 10W DA TP 2012 MR4 2007 000518 R CHIP 2 7Kohm 5 1 10W DA TP 2012 MR8 2007 000586 R CHIP 22Kohm 5 1 10W DA TP 2012 Electrical Parts List Location no Code no Description Specifiation Remarks Location no Code no Description Specifiation Remarks 8 8 Samsung ...

Page 41: ...Samsung Electronics 9 1 QIC1 TDA7430 KA22291 JIC1 LC866232A UIC1 IIC1 LA1836 HIC1 LC72131 RIC1 BA3950 9 Block Diagrams 9 1 Main ...

Page 42: ... MOTOR CONTROL S W SENSOR FOK MAIN PCB MAIN PCB MICOM CTRL LINE POWER AUDIO LINE 10 1 11 2 19 19 R G L 21 20 36 37 38 68 25 26 30 29 10 70 72 73 75 76 27 MCK MDATA MLT ISTAT SQDT LKFS SOS1 SQCK A GND R CH L CH GND B RESET LOCK SMEF WDCH SMON SMSD SL IN SP IN TE IN EF IN VREF SL SL MOTOR ACTUATOR DRIVER 6 ASSP KB9223 NIC 9223 SCW1 SCW4 SIC1 SIC2 SIC3 DIGITAL SIGNAL PROCESSOR 16 9344MHz 66 69 8 EFM ...

Page 43: ...7 16 ALC DUFF AM OSC AM MIX AM RF AMF AGC AM DET AM IF SMFT LEVEL DET FM IF FM DET REG GND TUNING DRIVE S CURVE AM FM IF BUFF COMP VCC AM FM SW VCC PHASE DET PILOT DET FF FF FF STEREO DRIVE TRIG MUTE STERO SW DECODER PM AM LA1836 IIC1 TDA7265 AIC1 9 3 1 Main 9 3 IC TR Internal Diagrams Block Diagrams ...

Page 44: ... MODE CONTROL BIAS CIRCUIT PU NF 1 PB IN 1 A B SW PB GND MUTE IN 1 REC OUT 1 PB OUT 1 REC GND Vcc Vcc PBOUT 2 100K PRE INPUT N F ALC DET PRE N F INPUT REC NF 2 REC IN 2 REC IN 1 REC IN 1 100K ALC TIME CONSTANT R P SW A IN B IN A B SELECT S W A IN B IN V CC ST BY Vref MODE PRE GND GND µ COM 5 6V 250 mA CDP 10V 600mA MOTOR 13 3V MAIN SIGNAL 12V 0 8A 6 10 9 11 12 Selector 3 5 1 2 8 BA3950 RIC1 KA2229...

Page 45: ...Samsung Electronics 9 5 Block Diagrams BA4560 LIC1 MIC1 OPTION ...

Page 46: ... M MU UT TE E 2 B2 P3 f f f f f f f 2f B3 S S B BA AS SS S 3 3 B3 P4 h h h h h h h 2g B4 S SR RS S W W X X 3 B4 P5 j j j j j j j 2c B5 A AU UT TO O 1 1 B5 P6 k k k k k k k 2e B6 M MO ON NO O 1 B6 P7 g g g g g g g 2d B7 R RE EP PE EA AT T S1 B7 P8 m m m m m m m 1a B8 1 1 S2 B8 P9 c c c c c c c 1b B9 P PR RE ES SE ET T S3 B9 P10 e e e e e e e 1f B10 R RE EC C U B10 P11 r r r r r r r 1g B11 B11 P12 p...

Page 47: ...25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND GND 10K REGULATOR 10K 10K VCC VCC 10K 10K T S D 10K 10K 10K 50K MUTE LEVEL SHIFT LEVEL SHIFT KA9258 NIC9258 LB1641 BA6209 MOTOR DRIVER SIC1 SIC2 SIC3 NIC1641 9 3 2 CD 9 6 Samsung Electronics Block Diagrams TR 1 E NOTE KSB564 EBC TYPE C B 2 3 KSR1003 A928 ...

Page 48: ...ESS CENERATOR DIGITAL OUTPUT MODE SELECTOR CPU INTERFACE TRACK COUNTER X TAL TIMING OSCILATOR INTERPOLATOR CLV SERVO FRAME SYNC DETECTOR PROTECTOR INSERTOR EFN1 APDO2 APDO1 SOCK SODT SDAT SBGK SOS1 VCOLO1 CONTVOL DPFIN DPFOUT DPDO SMEF SMON SMDP SMSD LOCX XOUT XIN MDAT MCK MLT DSPEED CNIN ISTAT DSPEED SEL1 SEL2 SEL3 SEL4 TEST C2P0 ADATA2 ADATA1 LRCH1 LRCH2 DATX EFM DEMODULATOR KS9286 NIC9286 Samsu...

Page 49: ...0 CH11 MUTEI RRC CH20 CH21 GC21 GC20 DCC1 RFO PD1 PD2 F E EI PD LD VR ARF IRF ASY EFM RFI DCB Focus Error Amp FE BIAS Adjustment Tracking Error Amp E F Balance Gain Control APC Amp Center Voltage Amp RF Level AGC Equalizer EFM Comparator Defect Dectection Circuit Micom Data Interface Logic MICOM TO SERVO CONTROL AUTO SEQUENCER ADJUSTMENT FREE CONTROL FS1 to FS4 TM to TM6 BAL1 to BAL5 PS1 to PS4 GA...

Page 50: ...CK TDA7430 DATA SW2 BAND SWITCH ACTIVE H SW1 BAND SWITCH ACTIVE H LC72131 PLL DATA TEST RESET PORT SUB OSC CLOCK SUB OSC CLOCK GROUND MAIN OSC MAIN OSC MAIN POWER INPUT PORT 5V A D KEY INPUT1 A D KEY INPUT2 A D KEY INPUT3 ELECTRONIC LEVEL METER L SIG INPUT ELECTRONIC LEVEL METER R SIG INPUT PLL IC LC72131 DATA IN LA1836 TUNE LA1836 ST POWER ON OFF SENSE CD DOOR SWITCH SCOR INTERRUPT REMOCON INPUT ...

Page 51: ... PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT PORT of GRID CONTROL FLT...

Page 52: ...The output pin for post filter channel1 The input pin for post filter channel1 Amplifier output pin for gain and low pass filtering of DAC output CH1 Amplifier negative input pin for gain and low pass filtering of DAC output CH1 The pin for noise reduction of post filter bias VSS for post filter The input pin for post filter muting control The input pin for current setting of focus search track ju...

Page 53: ...mplifier output pin The input pin of tracking error low pass filtering signal The power supply pin for logic circuit The capacitor connectiong pin for tracking defect compensation Focus servo input pin Focus error amplifier output pin The capacitor connection pin for focus defect compensation The capacitor connection pin for high frequency tracking gain switch The pin for high frequency gain chang...

Page 54: ...t 2 1168MHz 4 2336MHz when ESP ON C2 Pointer for output audio data Input terminal2 of reference voltage L Floating Input terminal2 of reference voltage L GND connection Analog VCC2 Right Channel audio output through D A converter Left Channel audio output through D A converter Analog ground2 Input terminal1 of reference voltage H VDD connection Input terminal2 of reference voltage H Floating Empha...

Page 55: ...e sync RA7 Frame sync protection state RA8 Display of either RAM overflow or underflow for 4 frame jitter margin RA9 Only monitoring signal 4 2336MHz RA10 16 9344MHz signal output RA11 Terminal for test Terminal for test Mode Selection1 H 33 8688MHz L 16 9344MHz TEST input terminal GND connection Mode Selection2 H CD ROM L CDP TEST input terminal GND connection TEST input terminal GND connection E...

Page 56: ...10 PCB Diagrams 10 1 Main Samsung Electronics 10 1 ...

Page 57: ...10 2 Front PCB Diagrams 10 2 Samsung Electronics ...

Page 58: ...10 3 CD PCB Diagrams 10 3 1 Main Samsung Electronics 10 3 ...

Page 59: ...11 Wiring Diagram Samsung Electronics 11 1 ...

Page 60: ...IIC1 LA1836 JIC1 KA22291 JIC2 LA2010 TAPE BOARD MIC1 MIC1 OPTION BOARD DOMESTIC AIC1 TDA7265 BA3950 RIC1 LIC1 LIC1 QIC1 TDA7430 12 Schematic Diagrams 12 1 Main Samsung Electronics 12 1 ...

Page 61: ...UIC1 LC866232A 12 2 Samsung Electronics Schematic Diagrams 12 2 Front ...

Page 62: ... 3 CD Samsung Electronics 12 3 Schematic Diagrams 1 2 NCW104 NCW100 G3X8 KB9223 KS9286 SCHEMATIC DIAGRAM NIC1641 SIC2 1 CD SIC1 LB1641 3 CD NIC9223 KB9223 ASSP NIC9286 KS9286 DSP D ACON NIC9258 KA9258 1 2 ...

Page 63: ...2 5V 2 5V 2 5V 8V 5V 5V 0V 2 5V 2 5V 2 5V 0V 2 5V 2 5V 2 5V 8V 8V 2 5V 2 5V 2 5V 2 5V 0V 4 5V 4 5V 2 5V 8V 5V 5V 0V 2 5V 4 5V 4 5V 0V 4 5V 4 5V 2 5V 8V 8V 2 5V 2 5V 4 5V 4 5V 0V No IC Name STOP MODE STOP MODE KB9223 PLAY MODE PLAY MODE 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 5V 0V 5V 2 5V 5V 0V 5V 0V 3 8V 2 5V 5V 0V KB...

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Samsung MM-28, Service Manual

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