Panasonic SC-EN37P, Service Manual

Page 1: ...ial Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law SC EN37P Colour K Black Type System SC EN37P K Main Unit SA EN37P K Speakers SB EN37AP K L SB EN37P K R Sampling frequency CD 44 1 kHz MP3 32 kHz 44 1 kHz 48 kHz Bit rate MP3 32 kbps to 384 kbps Decoding 16 20 24 bit linear Pick up Wavelength 785 nm Laser power CLASS 1 Audio Output Disc Number of channels 2 ...

Page 2: ...ly of CD Servo P C B 23 9 12 Disassembly of Motor Unit Motor P C B 24 9 13 Disassembly of CD Block CD Lid 25 9 14 Disassembly of Speakers 26 Power consumption in standby mode 2 0 W appx Notes Specifications are subject to change without notice Mass and dimensions are approximate 10 Service Fixture and Tools 29 11 Service Positions 29 11 1 Check and Repair of CD Servo P C B 30 11 2 Check and repair...

Page 3: ... 59 19 Terminal Function of IC s 60 19 1 IC801 MN101EF16ZXW Servo Processor Digital Signal Processor Digital filter and D A Converter 60 20 Exploded Views 61 20 1 Cabinet Parts Location 61 20 2 Packaging 63 21 Replacement Parts List 65 3 SC EN37P ...

Page 4: ...resistance value between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads connectors control shafts etc When the exposed metallic part has a return path to the chassis the reading should be between 1MW and 5 2MW When the exposed metal does not have a return path to the chassis the reading must be 1 1 2 Leakage Current Hot Check See Figure 1 1 Plug the...

Page 5: ...e indicated rated impedance of the amplifier are used If this occurs follow the procedure outlines below 1 Turn off the power 2 Determine the cause of the problem and correct it 3 Turn on the power once again after one minute Note When the protection circuitry functions the unit will not operate unless the power is first turned off and then on again 1 5 Safety Parts Information Safety Parts List T...

Page 6: ...ssembly 3 Use only a grounded tip soldering iron to solder or unsolder ES devices 4 Use only an anti static solder remover device Some solder removal devices not classified as anti static ESD protected can generate electrical charge to damage ES devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ES devices 6 Do not remove a replacement ES devi...

Page 7: ...Traverse Unit The laser diode in the traverse deck optical pickup may break down due to potential difference caused by the static electricity of clothes or our human body So be careful of electrostatic breakdown during repair of the traverse deck optical pickup Way of handling the traverse deck optical pickup 1 Do not subject the traverse deck optical pickup to static electricity as it is extremel...

Page 8: ...not to let your clothes touch the traverse deck optical pickup Caution when replacing the Traverse Deck The traverse deck has a short point shorted with solder to protect the laser diode against electrostatics breakdown Be sure to remove the solder from the short point before making connections 8 SC EN37P ...

Page 9: ...work using Lead Free Solder PbF The lead free solder has to be used when repairing the equipment for which the lead free solder is used Definition The letter of PbF is printed on the PCB using the lead free solder To put lead free solder it should be well molten and mixed with the original lead free solder Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC Since t...

Page 10: ...6 Accessories Remote Control AC Cord FM AM Antenna I Pod cradle 10 SC EN37P ...

Page 11: ...7 Operation Procedures 7 1 Remote Control Key Buttons Operations 7 2 Main Unit Key Buttons Operations 11 SC EN37P ...

Page 12: ...7 3 Connection 12 SC EN37P ...

Page 13: ...he section 8 2 for more information 7 8 9 Forced VOL setting Refer to the section 8 2 for more information 1 1 CD Loading Test Refer to the section 8 2 for more information 1 2 CD Traverse Test Refer to the section 8 2 for more information 1 3 CD Combination Test Refer to the section 8 2 for more information 1 4 CD Auto Adjustment Display Refer to the section 8 2 for more information SLEEP Cold St...

Page 14: ...ition 2 When EEPROM IC is detected and there is no ROM correction Checksum Condition 3 When EEPROM IC is detected and has ROM correction but not working properly Display 2 The Check Sum of EEPROM and firmware version will be display for 1 sec ROM correction Firmware version No In any mode 1 Press button on main unit follow by 4 and 7 on remote control To exit press button on main unit or remote co...

Page 15: ...d TOC It fails when TOC is not completed by IOS or the traverse is out of focus The counter will increment by 1 until reach 9999999 fl In doctor mode 1 Press 1 2 button on remote control To cancel press 0 button remote control To exit press button on main unit or remote control CD Combination Test Mode A combination of CD loading traverse unit test The counter will increment by 1 until reach 99999...

Page 16: ...tents Description of error Automatic FL Display Remarks F15 CD REST SW abnormal CD traverse position initial setting operation failsafe counter 1000ms waiting for REST SW to turn on Error no shall be clear by force or during cold start For CD unit For traverse Press on main unit for next error F26 Communication between CD servo LSI and micro p abnormal CD function DTMS command after system setting...

Page 17: ...scribed only when required 3 Select items from the following index when checks or replacement are required 4 Refer to the Parts No on the page of Parts Location and Replacement Parts List Section 21 if necessary Warning This product uses a laser diode Refer to caution statement Precaution of Laser Diode Disassembly of Rear Cabinet Disassembly of D Port P C B Disassembly of Panel P C B LCD P C B Di...

Page 18: ...art is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing To assemble the unit reverse the steps shown in the chart as below 9 2 1 For Main unit 9 2 2 For Speaker unit 18 SC EN37P ...

Page 19: ...9 3 Main Components P C B Locations 9 3 1 Main Parts Locations 9 3 2 Speaker Unit Parts Location For SB EN37A only 19 SC EN37P ...

Page 20: ...able FP806 on Main P C B and remove the rear cabinet as arrow shown Step 2 Remove D Port P C B 9 4 Disassembly of rear cabinet 9 5 Disassembly of D Port P C B Follow the Step 1 Step 3 of Item 9 4 Disassembly of rear cabinet 9 6 Disassembly of Panel P C B LED P C B Follow the Step 1 Step 3 of Item 9 4 Disassembly of rear cabinet 20 SC EN37P ...

Page 21: ...ift up the Main P C B Sensor P C B and Tuner P C B 9 7 Disassembly of Main P C B Sensor P C B Tuner P C B Follow the Step 1 Step 2 of Item 9 4 Disassembly of rear cabinet 9 8 Disassembly of Switch P C B Traverse Unit Follow the Step 1 Step 3 of Item 9 4 Disassembly of rear cabinet Follow the Step 1 Step 3 of Item 9 7 Disassembly of Main P C B Sensor P C B Tuner P C B 21 SC EN37P ...

Page 22: ... 9 Disassembly of Power Switch P C B Tact Switch P C B Follow the Step 1 Step 3 of Item 9 4 Disassembly of rear cabinet Follow the Step 1 Step 2 of Item 9 6 Disassembly of Panel P C B LED P C B 9 10 Replacement of Traverse Cover Follow the Step 1 Step 3 of Item 9 4 Disassembly of rear cabinet Follow the Step 1 Step 2 of Item 9 7 Disassembly of Main P C B Sensor P C B Tuner P C B Follow the Step 1 ...

Page 23: ... the floating springs x 4 in safe place avoid losing them 9 11 Disassembly of CD Servo P C B Follow the Step 1 Step 3 of Item 9 4 Disassembly of rear cabinet Follow the Step 1 Step 2 of Item 9 7 Disassembly of Main P C B Sensor P C B Tuner P C B Follow the Step 1 of Item 9 8 Disassembly of Switch P C B Traverse Unit Follow the Step 1 Step 4 of Item 9 9 Disassembly of Power Switch P C B Tact Switch...

Page 24: ...ion Insert a short pin into FFC of the optical pickup See Handling Precautions for traverse unit Step 4 Remove the belt Step 5 Remove pulley gear 2nd gear and drive gear Step 6 Remove 2 screws at motor unit Step 7 Remove 1 screw and unsolder 3 points at gear base 9 12 Disassembly of Motor Unit Motor P C B Follow the Step 1 Step 3 of Item 9 4 Disassembly of rear cabinet Follow the Step 1 Step 2 of ...

Page 25: ...cd lid 9 13 Disassembly of CD Block CD Lid Follow the Step 1 Step 3 of Item 9 4 Disassembly of rear cabinet Follow the Step 1 Step 2 of Item 9 7 Disassembly of Main P C B Sensor P C B Tuner P C B Follow the Step 2 of Item 9 8 Disassembly of CD Servo P C B Switch P C B Follow the Step 1 of Item 9 11 Disassembly of Motor Unit Motor P C B 25 SC EN37P ...

Page 26: ...ove the back cabinet ass y Step 3 Unsolder the lead wires silver and gold Step 4 Remove 4 screws Disassembly of net frame ass y Step 5 Remove 4 screws 9 14 Disassembly of Speakers 9 14 1 Disassembly of the speaker SB EN37 R 26 SC EN37P ...

Page 27: ...Step 1 Remove 6 screws Step 2 Remove the back cabinet ass y Step 3 Unsolder the lead wires Step 4 Remove 4 screws 9 14 2 Disassembly of the rear cabinet SB EN37A L 27 SC EN37P ...

Page 28: ...move 4 screws Removal of Transformer P C B Step 1 Remove 1 screw on back cabinet assy Step 2 Remove 3 screws to remove the port unit Step 3 Remove 4 screws on Transformer P C B unit Step 4 Unsolder wire and remove Transformer P C B 28 SC EN37P ...

Page 29: ...5 14 Pins 11 Service Positions General procedures Connect the DC in cord cable from SB EN37A to main set connect AC power supply cord to speaker to on the set Load in cd and switch off the set Proceed to checking Note For description of the disassembly procedures see the Section 9 29 SC EN37P ...

Page 30: ...11 1 Check and Repair of CD Servo P C B 30 SC EN37P ...

Page 31: ...11 2 Check and repair of Main P C B Sensor P C B Tuner P C B Motor P C B D Port P C B Panel P C B LED P C B Power Switch P C B Tact Switch P C B Switch P C B 31 SC EN37P ...

Page 32: ...form described herein shall be regarded as reference information when probing defect point because it may differ from an actual measuring value due to difference of Measuring instrument and its measuring condition and product itself 12 1 Main P C B 32 SC EN37P ...

Page 33: ...12 2 CD Servo P C B 12 3 Motor P C B 12 4 Panel P C B 12 5 Tuner P C B 33 SC EN37P ...

Page 34: ...12 6 Waveform Chart 34 SC EN37P ...

Page 35: ...13 Wiring Connection Diagram 35 SC EN37P ...

Page 36: ...SC EN37P 36 ...

Page 37: ...14 Block Diagram 14 1 CD Servo SC EN37P 37 ...

Page 38: ...14 2 Tuner SC EN37P 38 ...

Page 39: ...14 3 Main 1 2 Transformer Sensor D Port SC EN37P 39 ...

Page 40: ...14 4 Main 2 2 Panel LED Power Switch Tact Switch Switch Motor SC EN37P 40 ...

Page 41: ...s important for safety Furthermore special parts which have purposes of fire retardant resistors high quality sound capacitors low noise resistors etc are used When replacing any of components be sure to use only manufacturer s specified parts shown in the parts list Capacitor values are in microfarad µF unless specified otherwise F Farad pF Pico Farad Resistance values are in ohm W unless specifi...

Page 42: ...42 SC EN37P ...

Page 43: ... All schematic diagrams may be modified at any time with the development of the new technology 16 Schematic Diagram SC EN37P 43 ...

Page 44: ...16 1 A CD Servo Circuit SC EN37P 44 ...

Page 45: ...16 2 B Tuner Circuit SC EN37P 45 ...

Page 46: ...16 3 C Main Circuit SC EN37P 46 ...

Page 47: ...SC EN37P 47 ...

Page 48: ...SC EN37P 48 ...

Page 49: ...16 4 D Panel Circuit E D Port Circuit SC EN37P 49 ...

Page 50: ...16 5 F LED Circuit G Power Switch Circuit H Tact Switch Circuit I Switch Circuit SC EN37P 50 ...

Page 51: ...16 6 J Motor Circuit K Sensor Circuit L Transformer Circuit SC EN37P 51 ...

Page 52: ...SC EN37P 52 ...

Page 53: ...17 Printed Circuit Board Note Circuit board diagrams may be modified at any time with the development of new technology SC EN37P 53 17 1 A CD Servo P C B B Tuner P C B ...

Page 54: ...SC EN37P 54 17 2 C Main P C B ...

Page 55: ...55 17 3 D Panel P C B E D Port P C B F LCD P C B G Power Switch P C B H Tact Switch P C B SC EN37P ...

Page 56: ...SC EN37P 56 17 4 I Switch Circuit P C B J Motor Circuit P C B K Sensor Circuit P C B L Transformer P C B ...

Page 57: ...17 4 I Switch Circuit P C B J Motor Circuit P C B K Sensor Circuit P C B L Transformer P C B SC EN37P 57 ...

Page 58: ...SC EN37P 58 ...

Page 59: ...18 Illustration of ICs Transistors and Diodes 59 SC EN37P ...

Page 60: ...tch 47 CD_TOP_SW I CD top switch 48 N C No connection 49 N C No connection 50 PLL_DO O PLL Data Output Pin No Mark I O Function 51 PLL_DI O PLL Data Input 52 N C No connection 53 N C No connection 54 N C No connection 55 PLL_CLK O PLL clock 56 PLL_CE O PLL chip select 57 E CS No Connection 58 E_DATA I O EEPROM DATA I O 59 E_CLK No Connection 60 MBP1 O Micro P Beat Proof 1 61 MBP2 O Micro P Beat Pr...

Page 61: ...20 Exploded Views 20 1 Cabinet Parts Location SC EN37P 61 ...

Page 62: ...SC EN37P 62 ...

Page 63: ...20 2 Packaging SC EN37P 63 ...

Page 64: ...SC EN37P 64 ...

Page 65: ...VER M 303 RMS0757 1 FIXED PIN M 304 RME0109 FLOATING SPRING M 305 RMG0730 G FLOATING RUBBER M 306 XTN2 6GFJ SCREW M 307 RMR1395 X MIDDLE CHASSIS M PRINTED CIRCUIT BOARDS REPV0111A CD SERVO P C B M RTL REPV0136A TUNER P C B M RTL REPV0136A MAIN P C B M RTL REPV0136A PANEL P C B M RTL REPV0129A D PORT P C B M RTL 21 Replacement Parts List Important safety notice Components identified by mark have sp...

Page 66: ...DAB000019 DIODE M D3 B0CDAB000019 DIODE M D4 B0AACK000004 DIODE M D602 B0EAKM000117 DIODE M D603 B0EAKM000117 DIODE M D604 B0EAKM000117 DIODE M Ref No Part No Part Name Description Remarks D605 B0AACK000004 DIODE M D607 B0AACK000004 DIODE M D608 B0BA8R700009 DIODE M D610 B0AACK000004 DIODE M D611 B0AACK000004 DIODE M D612 B0ACCE000003 DIODE M D613 B0ACCE000003 DIODE M D614 B0BA6R100003 DIODE M D61...

Page 67: ...W725 ERJ3GEY0R00V CHIP JUMPER M W726 ERJ3GEY0R00V CHIP JUMPER M W727 ERJ3GEY0R00V CHIP JUMPER M W728 ERJ3GEY0R00V CHIP JUMPER M W729 ERJ6GEY0R00V CHIP JUMPER M W730 ERJ8GEY0R00V CHIP JUMPER M W731 ERJ3GEY0R00V CHIP JUMPER M W732 ERJ6GEY0R00V CHIP JUMPER M W733 ERJ6GEY0R00V CHIP JUMPER M W734 ERJ3GEY0R00V CHIP JUMPER M W735 ERJ6GEY0R00V CHIP JUMPER M W736 ERJ8GEY0R00V CHIP JUMPER M W737 ERJ8GEY0R00...

Page 68: ... Part No Part Name Description Remarks R202 D0GB562JA008 5 6K 1 16W M R203 D0GB473JA008 47K 1 16W M R204 D0GB562JA008 5 6K 1 16W M R205 D0GB562JA008 5 6K 1 16W M R206 D0AE682JA178 6 8K 1 4W M R207 D0GB223JA008 22K 1 16W M R208 D0GB332JA008 3 3K 1 16W M R209 D0GB103JA008 10K 1 16W M R210 D0GB392JA008 3 9K 1 16W M R211 D0GB333JA007 33K 1 16W M R212 D0GB682JA008 6 8K 1 16W M R213 D0GB472JA008 4 7K 1 ...

Page 69: ...20K 1 16W M R3003 D0AF100JA039 10 1 4W M R3004 ERJ6GEYJ472V 4 7K 1 10W M R3005 ERJ6GEYJ472V 4 7K 1 10W M R3006 D0GB155JA007 1 5M 1 16W M Ref No Part No Part Name Description Remarks R3007 D0GB125JA007 1 2M 1 16W M R3008 ERJ3GEYJ224V 220K 1 16W M R3009 D0GB224JA007 220K 1 16W M R3010 D0GB101JA008 100 1 16W M R3011 D0GB101JA008 100 1 16W M R3012 D0GB103JA008 10K 1 16W M R3013 D0GB101JA008 100 1 16W ...

Page 70: ... 50V M C302 F1H1H221A748 220P 50V M C303 F1H1H221A748 220P 50V M C304 F1H1H221A748 220P 50V M Ref No Part No Part Name Description Remarks C305 F1H1H221A748 220P 50V M C309 ECEA1AKA470B 47 10V M C310 F2A1C101A147 100 16V M C311 F2A1HR33A234 33 50V M C312 F1H1H221A748 220P 50V M C313 F1H1H221A748 220P 50V M C353 ECA1AM221B 220 10V M C356 F1H1H221A748 220P 50V M C357 F1H1H221A748 220P 50V M C358 F2A...

Page 71: ... 16V M C7164 ECJ2FF1A106Z 10 10V M C7165 ECJ2FF1A106Z 10 10V M C7166 F1H1H103A219 0 01 50V M C7203 F2A0J221A200 220 6 3V M C7204 ECJ1VB1C104K 0 1 16V M C7216 ECJ1VB1H681K 680P 50V M C7217 ECJ1VB1C104K 0 1 16V M C7218 ECJ1VB1C823K 0 082 16V M C7223 F2A1H4R70037 4 7 50V M C7225 F1H1H102A219 1000P 50V M C7226 F1H1H102A219 1000P 50V M C7227 ECA1HAK010XI 1 50V M C7228 ECA1HAK010XI 1 50V M C7230 ECJ1VB1...