Panasonic REV-1 Service Manual Download | Manualshive

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Summary of Contents for REV-1

Page 1: ... the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the IJroductor Dt OdUCtS dealt with in this service information by anyone else could result in serious inj...

Page 2: ... C HEAD 28 5 4 4 FINE ADJUSTMENTOF A CHEAD 28 5 4 5 ADJUSTMENTOFX VALUE 28 5 4 6 FINE ADJUSTMENT OFX VALUE 29 Servicing Fixtures Tools 30 SELF TESTINDICATION DISPLAY 31 a SERVICE INFORMATION DISPLAY 33 7 1 PurposeofService information Display 33 7 2 TurningonService information Display 33 7 3 UseofService Modes 34 7 4 Service Information Number 36 7 5 TestMode 36 7 6 Timingchartfrom ModeSWto Syste...

Page 3: ...d has been installed Limiter so that PI post has been deleted A C Head base combined with P4 post A C Head has been combined with P4 post on the same base Change of NC head base type The change of the angle winding the tape on A C head has been reduced by the construction of A C head base has been changed from the revolution type to slide base type Improvement of P5 post P5 post operation has been...

Page 4: ...pring is working when the cassette tape is inserted so that the repelled force of the insertion spring has been reduced as differing from the present model Small sized Cassette holder unit Thinned unit a The Wiper arm method which has been adopted assigned Wiper arm between Cassette Holder Plate and Side Plate so that the small sized of the width has been realized b To prevent the increment of par...

Page 5: ...as the conventional Tension regulator Construction of Take up brake Take up brake is used Band brake as well as Supply brake depend on corresponding with Band brake is adopted at the Supply Side Mechanism mode Function Band EJECT MID Soft brake On REV Soft brake On PLAY Release of brake off STOP Brake On FF REW Release of brake off 1 4 Number of Gear Phase Alignment Point and Replacement Parts Num...

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Page 7: ...VE RACK ARM SS BRAKE ARM UNIT MAIN LEVER I T LOADING GEAR S LOADING GEAR S T INCLIND P2 P3 POST l TBRAKEARM UNITI CONVERSION LEVERA I Loafing motor Supplv Inadinn mmr Motorcoupling Wormgear WormwheelgearA Centergear Y w b Take uploadinggear T Pincharmunit P armunit n Loading rack gear IT Main lever 5 ...

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Page 25: ...1 U u u z G 2 I P m c1 q Q u m cc m w 5 23 ...

Page 26: ...5 2 Back tension adjustment Equipment required Back Tension Meter VFKOI32 VHS Cassette tape 180 minutes tape PAL VHS Cassette tape 120 minutes tape NTSC Specification 22 5 27 5g 1 2 Playback the cassette tape from the beginning and wait until the tape movement get the stabili zation for approx 10 20 seconds Insert the Back Tension Meter into the path of a a tape and measure the back tension to be ...

Page 27: ...TMENT ADJUSTMENT OF P4 POST HEIGHT ADJUSTMENT OF WC HEAD FINE ADJUSTMENT OF A C HEAD ADJUSTMENT OF X VALUE PREADJUSTMENT FINE ADJUSTMENT OF X VALUE If the Tape Interchangeability Adjustment is not per fect repeat the above procedures from 1 to 6 CAUTIONS To make an Adjustment Mode forTape Interchangeability press the FF and EJECT buttons simultaneously 3 times to set the Service Mode 2 In case of ...

Page 28: ...layback the Alignment Tape 3 If the RF envelope appears Iike example A or B in Fig M7 then adjustment of the tape guide post P2 Entrance is necessary e 4 Adjust the tape guide post P2 with the post adjustment screwdriver so that the RF envelope waveform at the entrance portion becomes flat as shown in Fig M7 C 1 I Fig M7 5 If the RF envelope appears like D or E in Fig M8 then adjustment of the tap...

Page 29: ...ssis by one screw Playback the Alignment Tape Rotate the screw A or B until the wrinkle ap pears on the lower edge of tape at P4 Post Rotate the screw A or B until the wrinkle just disappears on the lower edge of tape at P4 Post Connect the oscilloscope to audio output termi nal Rotate the screw C until audio signal is maxi mized NOTE 1 The relation between the rotation direc tion of screws A and ...

Page 30: ...e oscilloscope to the output of the Head Amp as shown in Fig M6 Playback the Alignment Tape Make sure that the condition of the wrinkle at P4 Post If the condition of the wrinkle is out of specification P4 Post adjustment has to be per formed as follows Turn the screw A counterclockwise until the wrinkle appears on the lower edge of tape at P4 Post Turn the screw A clockwise until the wrinkle disa...

Page 31: ... I I I 1 1 Fig M16 5 4 6 FINE ADJUSTMENT OF X VALUE Equipment required Fine Adjustment Gear Drive VFK0330 1 Connect the oscilloscope to the audio output and the video output Both output signals should be fixed by the external trigger 2 Playback the alignment tape and set the tracking control into center fix position 3 Adjust A C Head position by the Fine adjustment Gear Driver VFK0330 until the vi...

Page 32: ...Servicing Fixtures Tools 30 ...

Page 33: ...rned off When the power is turned on again the fault indication code will disappear and the unit will retrun to normal display mode either clock or counter is displayed 3 This fault indication code will be stored in the microprocessor even with the AC plug discon nected The two digit number portion of the stored fault indication code can be redisplayed in the FIP s second display portion the last ...

Page 34: ...ading motor drive circuit 2 Check the mechanism phase alignment Mechanism locks after tape unloading in 1 Check the loading motor drive circuit F 06 Eject mode 2 Check the mechanism phase alignment for cassette holder unit During recording mode recording signal is Protection of the overcurrent flowing in F 07 less than the normal condition transistor which produce the power supply for recording mo...

Page 35: ... reduce repair time 7 2 Turning on Service Information Display Press FF and EJECT buttons simultaneously for more than 3 seconds In case of VCR mounted shuttle ring turn the shuttle ring to FF and then press EJECT button for more than 3 seconds In Loewe model STOP button is used instead of FF button In the Service Information Display there are four digits divided into 3 functions The first digit i...

Page 36: ... FF and EJECT buttons simultaneously 3 Mode O 4 Mode 1 5 Mode 2 6 Mode 3 Storing the process number when the fault happened Checks that the sensor LED Supply Take up sensor circuits checks the circuits by blocking the light from the sensor LED to either or both Supply Take up Sensors When the light is blocked to both sensors 00 should be indicated on the service data number When the light is block...

Page 37: ...uit SYSTEM CONTROL C has received the command to rotate the cylinder motor Checks the loading unloading operation The loading motor rotates for loading operation when the PLAY button is pressed The loading motor rotates for unloading operation when the STOP button is pressed This mode can be displayed indefinitely until the OPERATE button is pressed NOTE Refer to Fig D5 for details of Service Data...

Page 38: ...ock 17 Supply reel lock 18 Take up reel lock 2 PG shifter automatic adjustment error Fig D4 Detail Service Information Number 7 5 Test Mode When the test terminals are shorted during turning off condition the following operation will be performed after AC power is applied Test Mode Information will be displayed on FIP insted of linear counter To release Test mode test Terminals should be opened 1 ...

Page 39: ...essed Tapenotrequired Leftdigitonly disregardRightdigitdisplay 81 8 9 u A n Landnodisplayindicatethatthe Taperequired Left Right Capstanmotor PLAY command received by If a symbolotherthanthoselistedis displayed a DigitDigit Systemcontrolmicroprocessor malfunction inthatcircuitisindicated Rightdigitonly disregard leftdigitdispaly 87 1 2 3 4 5 6 7 indicate thattheCapstanmotor 5 Left Right CUE FF FWD...

Page 40: ...ading H Loading H D h _ _ Timing chart Position SW 1 Position SW 2 Position SW 3 i Service Data o 7 1 7 3 7 2 7 4 7 I 5 7 6 Number 3 t It t Mode EJECT CASSETTE p Y REC STOP 2 FF REW DOWN REV CUE MID REV SLOW STILUPAUSE LOADING FWD SLOW UNLOADING STOP 3 1 1 Stop 3 The Pinch roller is on the Capstan motor shaft 2 Stop The Pinch roller is off the Capstan motor shaft 3 Service Data Number This is for ...

Page 41: ...assette is in the unit when the power is turned on the unit goes to the STOP3 position When the cassette tape has clear leader tape the unit is in loading mode after winding up the clear leader tape by Take up reel at the cassette down position and the unit goes to STOP3 position 8 2 Stand by in the STOP3 position 1 2 The unit goes to STOP3 position when the Stop mode is selected during the Play o...

Page 42: ...nsors at same time the cassette is ejected Operation after detecting the beginning and the end of tape Mode Detection of the beginning Detection of the end e Power off on Short CUE Short REW Cassette in Short CUE Short REW Loading Short CUE Short REW FF CUE Auto REW REW REV Short CUE PLAY REC Auto REW I I Timer REC Power off Both ends of tape detection tape cut no cassette 1 Cassette in The casset...

Page 43: ...sor ON Dew sensor OFF Power Compulsory Power on Power off Dew indication Indicate d and UI O Normal indication Cylinder Rotating 1 stop OUT Key operation Not possible 2 Possible Cassette in immediately a cassette is Possible ejected after it goes to cassette down position Power Compulsory Power on Power off Dew indication Indication d and UI O Normal indication Cylinder Rotating 1 stop IN Key oper...

Page 44: ...defined time the unit detects the mechanism lock and loading motor reverses or stops Loading operation lock Cassette tape is unloaded and ejected within 5 seconds Unloading operation lock Power is truned off within 5 seconds Cassette Ioadinghmloading lock a 1 Mechanism locks during the cassette in operation Cassette tape is ejected approximately 2 seconds later when the mechanism locks during the ...

Page 45: ...e detected within 5 seconds after the unit shifted to REW mode 2 Supply reel pulse can not be detected within 5 seconds after the unit shifted to FF mode 2 The reel pulse can not be detected more than 2 seconds sequentially within 5 seconds after completing the mechanism mode shift 3 The reel pulse can not be detected more than 800 msec past 5 seconds after completing the mechanism mode shift 8 11...

Page 46: ...re than 0 7 seconds In case PAUSE key is pressed Iessthan 1 second other than STILL mode the unit goes to STILL mode If PAUSE key is being held to press the unit goes to STILL mode and then goes to 1 1OSLOW mode after 1 second SLOW mode has not been set in 2 Head LP mode model When STOP key is pressed more than 3 seconds while a cassette tape is in the unit the cassette tape is ejected 8 13 Power ...

Page 47: ...pe In case of Timer recording short Flew is performed for 2 seconds and power is turned off when tape running is reached to the end of tape Power off and Eject Under power off and a cassette tape has been inserted when Eject key is pressed a cassette tape is ejected and power is turned off 8 17 CUE REV lock mode When FF REW key is pressed lightly less than 0 7 seconds during Play STILL and REV mod...

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