Panasonic SC-TM760 Service Manual Download Page 45 | Manualshive

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15.2. Main P.C.B.

68

SA-VK950GC / SA-VK950GS / SA-VK950GCS / SA-VK950GCT

45

service manual SC-TM760

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Summary of Contents for SC-TM760

Page 1: ...es son de un solo bafle Stereo System SC TM760 Colour S Silver Type MODEL UNIT SC TM760 SA TM760 Stereo SB TM760 Front Speaker SB TM760 SB TM760 SA TM760 Specifications POTENCIA DE SALIDA AMPLIFICADOR SC TM760 Frontal Alto 110 W RCM por canal 3Ω 1kHz 10 DAT Bajo 110 W RCM por canal 3Ω 100Hz 10 DAT UNIDAD PRINCIPAL POTENCIA DE SALIDA 5200 W P M P O 270 W 127 V ca 10 60 Hz 250 mV 520 1710 kHz paso d...

Page 2: ...turn path to the chassis the reading must be Figure 1 1 1 2 Leakage Current Hot Check See Figure 1 1 Plug the AC cord directly into the AC outlet Do not use an isolation transformer for this check 2 Connect a 1 5kΩ 10 watts resistor in parallel with a 0 15µF capacitor between each exposed metallic part on the set and a good earth ground such as a water pipe as shown in Figure 1 3 Use an AC voltmet...

Page 3: ...RCUIT DIRECTLY with a screwdriver blade for instance as this may destroy solid state devices After repairs are completed restore power gradually using a variac to avoid overcurrent Current consumption at AC 110 127V 50 60 Hz AC 220 240V 50 60 Hz in NO SIGNAL vol min at CD mode should be 500mA For GCS GS GCT only Current consumption at AC 220 240V 50 60 Hz in NO SIGNAL vol min at CD mode should be ...

Page 4: ...e 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 7 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 4 service manual SC TM760 ...

Page 5: ...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 device from its protective package...

Page 6: ...ti static flexible cable After replacing and connecting to the flexible board cut the anti static flexible cable Refer to Fig 3 1 Fig 3 1 3 2 Replacing Precautions for Optical Pickup Unit CD DVD Optical Pickup The optical pickup by which part supply was carried out attaches the short clip to the flexible board for laser diode electrostatic discharge damage prevention Please remove the short clip a...

Page 7: ...ree 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 the melting point ...

Page 8: ...imentación de CA SJA168 1A Antena interior de FM RSA0007 L Antena de cuadro de AM ND1AAAA00002 Pilas para el mando a distancia UM 3PA T Mando a distancia N2QAHB000058 KM19201 01 Plug para RCA Jack 3 5 8 service manual SC TM760 ...

Page 9: ...9 service manual SC TM760 ...

Page 10: ...8 New Features 8 1 CRS1D Mechanism Overview SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 10 service manual SC TM760 ...

Page 11: ...ent Mechanism Operation This mechanism has the following state 1 Driving of a tray to open close 2 Up down operation of a traverse performs a state changes of tray By using the plunger to lift release of a switching gear and the cam gear to lift release the function gear the motor can be link to several gear trains to perform various operations The functions that can be perform in this mechanism a...

Page 12: ...tion one by one from top to bottom Note represent tray number from 1 5 8 1 4 New CD Mechanism CRS1D Note This service manual does not contain the following information for the mention CD DVD Mechanism drive Schematic Diagram Block Diagram and P C B layout of CD DVD Loading P C B Part List for individual parts of the mechanism Exploded View and Parts List for individual parts of the CD DVD Mechanis...

Page 13: ...Changer Unit For more information refer to section 9 1 1 In Self Diagnostic Mode 1 Select for CD mode 2 Press button To exit press button on main unit or remote control The tray will return to PLAY position and then power off Doctor Mode To enter into Doctor Mode for checking of various items and displaying EEPROM and firmware version 1 2 1 All segments will light up for 1 second 2 The Check Sum o...

Page 14: ... will blink at 0 5 second interval In doctor mode 1 Press DIMMER button on remote control Tape Eject Test To check on the tape eject function For deck 1 2 In doctor mode 1 Press PROGRAM button on remote control 9 1 1 CD changer unit ageing test mode Below is the process flow chart of ageing for the CD changer unit CRS1 14 service manual SC TM760 ...

Page 15: ...36 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 15 service manual SC TM760 ...

Page 16: ...any problems occuring for the unit and its respective components by displaying the error codes These error code such as U H and F are stored in memory and held unless it is cleared The error code is automatically display after entering into self diagnostic mode 16 service manual SC TM760 ...

Page 17: ...ow a fail safe time after system command transmission is sent For CD unit For Traverse Press on main unit for next error F61 Power Amp IC output abnormal Upon power on PCONT HIGH DCDET L after checking LSI For power Press on main unit for next error IHMS Cam gear abnormality Cam gear does not rotate to HOME position For CD changer unit CRS1 Press SINGLE CHANGE on main unit for next error ICSL Cam ...

Page 18: ...GE on main unit for next error UDU UD base asssembly abnormal UD Base assembly does not move upwards from tray 5 to tray 2 For CD changer unit CRS1 Press SINGLE CHANGE on main unit for next error UDD UD base asssembly abnormal UD Base assembly does not move downwards from tray 1 to tray 5 For CD changer unit CRS1 Press SINGLE CHANGE on main unit for next error UD1 UD base asssembly abnormal UD Bas...

Page 19: ...echanism can be recalled and displayed in the order of the occurence under self diagnostic Refer to Section 9 1 for procedures to enter this mode Only the first 5 errors will be memorized in backup memory The subsequence error shall be ignored and not memorize For system with EEPROM as memory backup memory space in EEPROM is neccesary 2 To display all error code memorized In CRS1 Self Diagnostic m...

Page 20: ...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 25 if necessary Warning This product uses a laser diode Refer to caution statement Precaution of Laser Diode Caution After replacing of CD DVD Changer Unit ageing test is necessary Please confirm operation for CD DVD Changer Unit Dis...

Page 21: ... following chart 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 CD 21 service manual SC TM760 ...

Page 22: ...11 3 Main Parts Location 22 service manual SC TM760 ...

Page 23: ...ve the top cabinet Step 1 Remove 2 screws at rear panel Step 2 Detach the FFC cables CN2038 CN2036 Step 3 Release the claws on both ends Step 4 Lift the CD changer unit upwards to remove it 11 4 Disassembly of Top Cabinet 11 5 Disassembly of CD Changer Unit CRS1D Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet 23 service manual SC TM760 ...

Page 24: ...B Step 4 Remove rear panel Step 5 Remove 2 screws Step 6 Remove the Mecha Chassis Note For disassembly assembly of traverse unit please refer to section 11 16 of this service manual Please refer to original Service Manual for the Disassembly and Assembly of the CD Changer Unit CRS1D section 5 11 6 Disassembly of Rear Panel Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet Follow the...

Page 25: ...prevent for wire touch heat sink unit 2 The wire at upper fan connect to CNP2913 3 The wire at lower fan connect to CNP2914 Step 3 Release 2 claws Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet Follow the Step 1 Step 4 of Item 11 5 Disassembly of CD DVD Changer Unit Follow the Step 1 Step 4 of Item 11 6 Disassembly of Rear Panel 11 8 Disassembly of Front Panel Unit Follow the Ste...

Page 26: ...the Step 1 Step 4 of Item 11 5 Disassembly of CD DVD Changer Unit Follow the Step 1 Step 4 of Item 11 6 Disassembly of Rear Panel Follow the Step 1 Step 3 of Item 11 7 Disassembly of Main P C B Follow the Step 1 Step 4 of Item 11 8 Disassembly of Front Panel Unit 11 10 Replacement of Power Amp IC SMPS P C B Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet Follow the Step 1 Step 4 o...

Page 27: ...11 Disassembly of Digital Amp P C B Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet Follow the Step 1 Step 4 of Item 11 5 Disassembly of CD DVD Changer Unit Follow the Step 1 Step 4 of Item 11 6 Disassembly of Rear Panel Follow the Step 1 Step 3 of Item 11 7 Disassembly of Main P C B Follow the Step 1 Step 4 of Item 11 8 Disassembly of Front Panel Unit 11 12 Replacement for Power ...

Page 28: ...IC5400 Step 5 Release 2 catches Step 6 Remove Panel P C B 11 13 1 Disassembly of Tact Switch P C B Step 7 Remove the Volume knob Mic Volume Knob 11 13 Disassembly of Panel P C B Mic P C B Tact Switch P C B Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet Follow the Step 1 Step 4 of Item 11 5 Disassembly of CD DVD Changer Unit Follow the Step 1 Step 4 of Item 11 8 Disassembly of Fro...

Page 29: ...w 2 Note For disassembly of parts for deck mechanism unit refer to Section 11 18 11 14 Disassembly of Deck mechanism unit Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet Follow the Step 1 Step 4 of Item 11 5 Disassembly of CD DVD Changer Unit Follow the Step 1 Step 4 of Item 11 8 Disassembly of Front Panel Unit 11 15 Disassembly of Deck P C B Follow the Step 1 Step 2 of Item 11 4 ...

Page 30: ...catch push the pin in Step 3 Remove 4 pins Disassembly of optical pickup unit CD mechanism Follow the Step 1 Step 2 of Item 10 4 Disassembly of Top Cabinet Follow the Step 1 Step 4 of Item 10 6 Disassembly of CD Changer Unit Follow the Step 1 Step 2 of Item 10 14 Disassembly of Traverse Unit 30 service manual SC TM760 ...

Page 31: ...over Note Insert a short pin into FFC of the optical pickup Step 7 Rotate the traverse deck B to the arrow direction and shift the optical pickup to the furthest backward Step 8 Remove the catch of the drive rack and take out the drive rack Step 9 Place the convex part of an optical pickup to the concave part of a traverse base then take out the optical pickup 31 service manual SC TM760 ...

Page 32: ...2 of Item 10 4 Disassembly of Top Cabinet Follow the Step 1 Step 4 of Item 10 6 Disassembly of CD Changer Unit Follow the Step 1 Step 4 of Item 10 10 Disassembly of Front Panel Unit Follow the Step 1 Step 5 of Item 10 12 Disassembly of Deck Mechanism Unit 11 18 1 Disassembly of the pinch roller ass y and head block 32 service manual SC TM760 ...

Page 33: ...elease 2 claws and detach the head block connector Step 3 Remove 2 screws Step 4 Remove head block Step 5 Remove capstan belt A B Step 6 Remove the flywheel R Step 7 Release the claw and remove the winding lever and spring Installation of the belt Step 1 The boss and marking should be positioned horizontally 11 18 2 Disassembly of capstan motor ass y capstan belt A capstan belt B and winding belt ...

Page 34: ...er and spring while pressing the winding arm in the direction of arrow Step 6 Install the flywheel R Step 7 Put the capstan belt A temporarily as shown below Step 8 Put the capstan belt B on the motor ass y pulley Step 9 Install the sub chassis to the mechanism and then tighten screws 56 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 34 service manual SC TM760 ...

Page 35: ...tep 10 Install 3 screws Step 11 Put the capstan belt B as shown below Step 12 Put the capstan belt A on the motor ass y pulley 57 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 35 service manual SC TM760 ...

Page 36: ...arrow to remove it Step 2 Push up the cassette lid L R in the direction of arrow For DECK1 and DECK2 Step 2 Push the lever upward and open the cassette lid Remove the cassette tape 11 19 Replacement for cassette lid Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet 11 20 Rectification for tape jam problem Follow the Step 1 Step 2 of Item 11 4 Disassembly of Top Cabinet SA VK950GC SA...

Page 37: ...59 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 37 service manual SC TM760 ...

Page 38: ...FC A Deck P C B Main P C B REEX0485 14 Pins B Panel P C B Deck Mechanism P C B REEX0484 10 Pins 13 Service Positions Note For description of the disassembly procedures see the Section 11 13 1 Checking and Repairing of Main P C B 38 service manual SC TM760 ...

Page 39: ...13 2 Checking and Repairing of SMPS P C B Digital Amp P C B 39 service manual SC TM760 ...

Page 40: ...13 3 Checking and Repairing of Panel Deck Deck Mechanism P C B 40 service manual SC TM760 ...

Page 41: ... adjustment portion 8 kHz 20dB of the test tape QZZCFM in the forward play mode Vary the azimuth adjustment screw until the output of the R CH PB OUT R are maximized 2 Perform the same adjustment in the reverse play mode 3 After the adjustment apply screwlock NEJI LOCK to the azimuth adjusting screw Screw Lock applied on the screw must be more than 180 around screw 14 1 2 Tape Speed Adjustment Dec...

Page 42: ... Set AM SG to 600Hz 14 1 4 Bias Frequency Adjustment Deck 1 2 1 Set the unit to AUX position 2 Insert the Normal blank tape QZZCRA into DECK 2 and set the unit to REC mode use key 3 Adjust L1002 so that the output frequency is within the standard value Standard Value 89 110 kHz Fig 4 7 Receive 600Hz in the unit 8 Adjust L2601 ANT so that the EVM SG is maximized 9 Set AM SG to 520kHz 10 Receive 520...

Page 43: ...14 3 1 Cassette Deck Section 14 3 Alignment Points 43 service manual SC TM760 ...

Page 44: ...eform 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 44 service manual SC TM760 ...

Page 45: ...15 2 Main P C B 68 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 45 service manual SC TM760 ...

Page 46: ...69 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 46 service manual SC TM760 ...

Page 47: ...15 3 Panel P C B Power P C B Transformer P C B 70 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 47 service manual SC TM760 ...

Page 48: ...15 4 Deck P C B Deck Mechanism P C B Mic P C B Tuner P C B 71 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 48 service manual SC TM760 ...

Page 49: ...15 5 Waveform Chart 72 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 49 service manual SC TM760 ...

Page 50: ...73 SA VK950GC SA VK950GS SA VK950GCS SA VK950GCT 50 service manual SC TM760 ...

Page 51: ...2 7 7 2 1 2 6 3 1 7 2 9 2 6 5 7 2 6 5 1 2 7 8 1 1 1 1 6 5 2 6 3 6 3 0 6 E 3 E 3 3 6 7 8 2 7 7 2 1 2 6 3 1 7 2 9 2 6 5 7 2 6 5 1 2 7 8 a 1 9 5 2 9 9 7 6 6 5 2 3 7 7 3 3 3 1 1 5 2 7 6 7 2 9 1 2 7 6 6 5 2 E 3 6 5 2 6 1 0 3 6 5 2 6 5 1 8 7 7 1 1 2 3 0 2 7 8 2 2 9 2 9 6 7 8 2 1 1 7 1 0 1 1 7 1 0 7 8 2 5 3 1 3 1 51 service manual SC TM760 ...

Page 52: ... 0 1 6 3 E 3 3 5 6 5 2 6 3 3 1 3 1 3 1 2 1 2 6 6 0 3 1 1 1 1 5 7 2 6 2 1 2 6 5 2 7 1 2 4 3 5 6 5 6 1 3 6 5 2 6 3 0 6 1 0 2 1 2 6 1 6 5 2 6 3 7 6 7 7 0 8 2 9 5 9 1 2 3 7 5 2 3 6 8 0 1 6 5 2 6 3 1 3 5 2 6 1 6 1 52 service manual SC TM760 ...

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Page 60: ... 000324 5 2403 5 06 03 706 708 703 5 5 5 5 9 5 9 5 5 5 5 9 5 8708 8703 873 8700 6 7 8 3 003 3 207 00 003 3 003 880 860 330 38 880 860 05 205 03 33 5 03 5 0 202 20 20 204 230 238 233 237 60 service manual SC TM760 ...

Page 61: ...are the reference voltage of this unit measured by DC electronic voltmeter high impedance and oscilloscope on the basis of chassis Accordingly there may arise some error in voltage values and waveforms depending upon the internal impedance of the tester or the measuring unit Importance safety notice Components identified by mark have special characteristics important for safety Furthermore special...

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