LG KB-14P2B Service Manual Download Page 61

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4-26

MECHANISM TROUBLESHOOTING GUIDE

Auto REW doesn't work.

Is the output of END sensor

of supply side "H"?

“H”: more than 3.5V

“L”: less than 0.7V~1V

Is the voltage across IR LED

between 0.8~1.5V?

Replace LED.

Is the Vcc. voltage of End

sensor 5V?

Check the syscon power.

Replace End sensor.

Check syscon circuit.

YES

1.Deck Mechanism

No F/R modes.

Is the present mode,

F/R Mode?

Is the mode SW assembled

correctly (refer to Pages 4-14.)

Is the normal voltage supplied to

the Capstan Motor Vcc1, Vcc2.?

Does terminal voltage(Vctl) of

Capstan Motor supply side

more than 4V?

Check Servo, Power Circuits.

Replace the Capstan Motor.

Does the Capstan Motor rotate?

Do the T/Up, Supply Reel rotate?

Check syscon circuit.

YES

Summary of Contents for KB-14P2B

Page 1: ... PRECAUTIONS IN THIS MANUAL CHASSIS MV 995B MODEL KB KE KL KF 14P2B G P S MODEL KB KE KL KF 14P2BX GX PX SX MODEL KB KE KL KF 20 21P30X website http biz LGservice com e mail http www LGEservice com techsup html SERVICE MANUAL MODEL KE KL KF 14P2BX 21P30X LG Electronics inc ...

Page 2: ... KE KL KF 14P2B G P S MODEL KB KE KL KF 14P2BX GX PX SX MODEL KB KE KL KF 20 21P30X CONTENT SPECIFICATION 1 2 SAFETY INSTRUCTIONS 1 3 SERVICING PRECAUTIONS 1 4 DESCRIPTION OF CONTROLS 1 6 SECTION 1 SUMMARY TVCR SERVICE MANUAL ...

Page 3: ... o I n p u t General P o w e r S o u r c e A P o w e r C o n s u m 2 2 C h a n n e l T u n i n g S y s t e A n t e n n a U H S o u n d O u t p u t O p e r a t D i m e n s 2 ABBREVIA TIONS A D J A F C A G A M C P T D E F D E T F B T H V O S C S E P S e p S Y N C S I V I H H o V V I O S D S A P S B P F B S T S t e r e o L P F L D P D D G P L L P A P B M B T ...

Page 4: ...er a m e t t o b e e l Leakage Current Cold Check Antenna Cold Check W i t c o n n e P l o h m o h m a n t e n n I f t m e W h e n r e a A n o r e c e Leakage Current Hot Check S e e P l u g Do not use a line Isolation Transformer during this check C o n n e b e t w e e n a M e v o l t R e v e r s e v o l t v o l t c I n p o s r e p Leakage Current Hot Check circuit T h e H i F o r r e p l t h 1 5...

Page 5: ... e n d a q p i t o u c h t u b e p e r s 4 D a 5 U n l e l e c t h e c c o m A c s CAUTION T h U n l e s o f c 6 D w h i e q 7 e l e c a 8 A r e c e i p A l 9 service manual CAUTION D o n o t a Electrostatically Sensitive ES Devices S o m e s e a s i c a t y p i t r a n s f o l i n e l 1 o r s e e l e g r o u n d a v r e m o v a 2 A d e v a e x p 3 E 4 U s o g e n e r a t e 5 e l e 6 D p M o e l e...

Page 6: ... o n t a Power Output Transistor Device Removal Replacement 1 2 R e m 3 c 4 5 6 Diode Removal Replacement 1 p 2 B b 3 a r o u n d 4 S e c 5 t h e t w o a n d Fuse and Conventional Resistor Removal Replacement 1 h 2 S n o t c 3 CAUTION M c o t o p Circuit Board Foil Repair E x b o b o T h e w h e n e v e r At IC Connections T o r e f o l p c 1 k n n e c 2 c i f 3 c 4 R o u c o o f t h e c At Other ...

Page 7: ... UP DOWN adjusts the volume adjusts menu settings 8 REW REWIND REVIEW rewinds the tape at high speed in the stop mode reviews fast the tape during playback 9 PLAY plays back the tape at normal speed 10 PAUSE STILL stops the tape temporarily during recording displays a still picture during playback 11 STOP stops the tape during playback or recording 12 SLEEP sets the sleep timer 13 TRK AUTO adjust ...

Page 8: ...ects the tape 18 TV AV selects a TV or AV mode 19 MENU selects a menu 20 OK accepts your selection or displays the current mode 21 FF FAST FORWARD CUE winds the tape forward at high speed in the stop mode fast forward playback 22 REC ITR starts a manual recording or instant timer recording 23 SYSTEM selects the desired VCR colour system 24 QUICK VIEW returns to the previously viewed programme OK P...

Page 9: ...IEW rewinds the tape at high speed in the stop mode reviews fast the tape during playback 16 FF FAST FORWARD CUE winds the tape forward at high speed in the stop mode fast forward playback 17 STOP EJECT stops the tape during playback or recording or ejects the tape 18 OK option accepts your selection or displays the current mode 19 TAPE IN INDICATOR option illuminates green while a video cassette ...

Page 10: ...DEL KB KE KL KF 14P2B G P S MODEL KB KE KL KF 14P2BX GX PX SX MODEL KB KE KL KF 20 21P30X CONTENT EXPLODED VIEW 2 2 EXPLODED VIEW PARTS LIST 2 3 DISASSEMBLY INSTRUCTIONS 2 6 SECTION 2 DISASSEMBLY PART TVCR SERVICE MANUAL ...

Page 11: ...2 2 EXPLODED VIEW 14P2 330 340 320 315 300 120 501 520 310 943 400 603 610 601 602 121 A00 174 913 510 112 153 170 150 ...

Page 12: ...ER ASSY GREEN 3809V00185C BACK COVER ASSY BLUE SCART 3809V00185E BACK COVER ASSY SILVER SCART 3809V00185F BACK COVER ASSY BLUE PHONO 3809V00185D BACK COVER ASSY PINK SCART 3809V00185G BACK COVER ASSY PINK PHONO 501 4810V00012A BRACKET SMPS 520 6871VDM105A PWB ASSY MAIN2 14 NARROW 601 4810V00195C BRACKET MAIN 602 4814V00158B SHIELD BOTTOM 603 4814V00157E SHIELD TOP CASE 610 6871VMM449A PWB ASSY MAI...

Page 13: ...330 320 315 603 610 601 602 A00 501 520 P801 913 510 112 153 170 150 310 943 400 120 EXPLODED VIEW 20 21P30X 2 4 ...

Page 14: ... ASSY MAIN2 CKD KF 6871VDM105L 6871VDM105M PWB ASSY MAIN2 CKD KB 601 4810V00195A 4810V00195A BRACKET MAIN 602 4814V00158B 4814V00158B SHIELD BOTTOM 603 4814V00157F 4814V00157F SHIELD TOP CASE 610 6871VMM449A PWB ASSY MAIN PAL E D F W TXT 6871VMM449B 6871VMM449B PWB ASSY MAIN PAL E D F W O TXT 6871VMM449C 6871VMM449C PWB ASSY MAIN PAL E D F W O TXT 6871VMM449F PWB ASSY MAIN PAL E D F W TXT 6871VMM4...

Page 15: ...s Removal 1 c 2 G 4 Speaker Assembly Removal 1 c 2 5 CPT REMOV AL 1 C 2 P 3 4 PICTURE TUBE HANDLING CAUTION D u e t o c p T H o r s r e s u l t p e r s Fig 2 1 Fig 2 2 CPT Board Remove Screws Remove Screws Main 2 PCB Side AV PCB Main chassis CPT Board Main 2 PCB Side AV PCB Main chassis Speaker MODEL 14P2 MODEL 20 21P30X ...

Page 16: ... PX SX MODEL KB KE KL KF 20 21P30X CONTENT PURITY CONVERGENCE ADJUSTMENT 3 2 ADJUSTMENT INSTRUCTIONS 3 5 BLOCK DIAGRAM 3 7 WIRING DIAGRAM 3 10 TROUBLESHOOTING CHARTS 3 11 COMPONENT LOCATION GUIDE 3 16 PRINTED CIRCUIT BOARDS 3 17 SECTION 3 ELECTRICAL PART TVCR SERVICE MANUAL ...

Page 17: ...mpletely forward 5 Reconnect the internal degaussing coil 6 Position the beam bender locking rings at the 9 o clock position and the other three pairs of tabs 2 4 and 6 pole magnets at the 12 o clock position 7 Perform the following steps in the order given to prepare the receiver for the purity adjustment procedure a Face the receiver in the magnetic north direction b Externally degauss the recei...

Page 18: ...nal degaussing coil 9 Turn on the receiver connect a signal generator to the VHF antenna terminal and apply a crosshatch signal Caution During the convergence adjustment procedure be very careful not to disturb the purity adjustment tabs are accidentally move purity should be confirmed before proceeding with the convergence adjustments Note Make sure the focus is set correctly on this instrument b...

Page 19: ... and blue horizontal lines Fig upper right 17 Temporarily place a rubber wedge at the 5 o clock and 7 o clock positions to hold the horizontal position of the yoke 18 Check the 3 o clock and 9 o clock areas to confirm that the red and blue vertical lines are converged If the lines are not converged slightly offset the horizontal tilt of the yoke move the temporary rubber wedges if necessary to equ...

Page 20: ...m 2 C b y p 1 4 X Distance Adjustment 1 R F 2 C p r e CAUTION I t h e 1 5 Audio Level Check and Adjustment 1 t o J r e s 2 P a n t h e 3 6 2 CIRCUIT ADJUSTMENT 1 PG Adjustment 1 1 Necessary Instruments 1 2 3 1 2 Adjustment 1 2 C M O 3 t h e 4 b DRUM P2 FE HEAD P1 ARM TENSION P0 SUPPLY REEL TAKE UP REEL PINCH ROLLER TAPE CAPSTAN T UP ARM P4 A C HEAD P3 X DISTANCE ADJUST SCREW AZIMUTH SCREW CONE POI...

Page 21: ...t t th he e s sa am me e t ti im me e 5 SIF Adjustment 1 2 3 6 RF AGC Adjustment 1 2 C 3 i n t o S V 4 b 7 White Balance Adjustment 1 w h 2 3 i 4 P r e s s G 8 Deflection Data Adjustment 1 2 P r s e 3 4 5 Vertical SLOPE adjustment S e l Ł P r e t h e 6 Vertical amplitude adjustment S e l Ł P r e l o f 7 Vertical Shift Adjustment S e l Ł P r e w i t 8 Horizontal Shift Adjustment S e l Ł P r e w i t...

Page 22: ...3 7 BLOCK DIAGRAM ...

Page 23: ...VCD BLOCK DIAGRAM 3 8 ...

Page 24: ...VIDEO AUDIO BLOCK DIAGRAM 3 9 ...

Page 25: ...3 10 WIRING DIAGRAM TOUCH P805 P805 1 P708 1 P602 P804 P03 P01 P02 P708 P602 P805 P804 P708 P102 P702 P703 P901A SMPS PWB P802 P103 P100 CPT PWB ...

Page 26: ...in 9 of T801 YES NO POWER NO STAND BY Replace the Fuse Check the 6V Line of MAIN 1 BOARD Check if the Fuse is O K YES NO Check Replace DB801 R801 C806 NO Check Replace D806 Q801 R807 ZD801 C814 IC801 NO Check Replace FR851 D852 C856 Q860 Q861 Q862 ZD860 ZD861 R874 Check the pin 11 of P804 LOW NO Check Replace IC857 D859 F852 C875 NO TROUBLE SHOOTING ...

Page 27: ...n 9 of P804 YES NO POWER NO MONITOR ON Go to NO POWER NO ST BY BLOCK Go to NO RASTER BLOCK Check T701 Q781 and go to NO RASTER BLOCK Check the NO POWER NO ST BY BLOCK YES NO Check the pin 10 of P804 HIGH NO Check Replace D851 L851 C860 IC851 Check the pin 10 of P804 HIGH NO ...

Page 28: ...s there about 8V at pin 6 of P805 YES NO RASTER Go to NO POWER BLOCK Go to NO PICTURE BLOCK Is there about 115V at pin 3 of T701 YES NO Check Replace F852 D850 R858 IC853 C863 Check the 8V LINE of VCD BOARD NO Check the H OUT LINE of VCD BOARD Check Replace IC501 of VCD BOARD NO Check Replace Q782 T781 R783 R787 Q781 NO Check Replace T701 5PIN CONNECTOR FR901 NO ...

Page 29: ...he V A V B signal appear at pin 4 7 of P805 YES NO Check Replace FR702 D702 C704 L731 Check Replace FR701 D701 C708 C734 NO Is there about 200V at pin 1 of P902 YES NO PICTURE Check the CVBS line of VCD Check Replace IC901 Check screen voltage Does the RGB signal appear at pin 3 5 7 of P901 YES NO Check Replace FR704 D703 C702 T701 5PIN CONNECTOR L901 R911 NO NO ...

Page 30: ...appear at pin 9 of P805 YES NO SOUND Check Replace FR854 D855 IC601 Check Replace speaker speaker connector Is there about 25V at pin 5 of IC601 YES NO Check the Audio source line of VCD Check the voltage at collector of Q601 Check Replace IC601 external components of IC601 NO NO ...

Page 31: ...S E4 Q03T E4 Q04T F5 Q05T G5 R01 B3 R02 B1 R03 C2 R04 C2 R06 C1 R08 B3 R09 B2 R10 B2 R11 B2 R12 B2 R14 B3 R15 B4 R16 B4 R17 C5 R18 B4 R19 C4 R20 C5 R22 C4 R23 A5 R24 A5 R25 A5 R26 A5 R27 A4 R28 C5 R29 A3 R30 A3 R31 A1 R33 B3 R36 B1 R37 B1 R38 B1 R39 B2 R40 B2 R41 A2 R42 A2 R43 C4 R45 A2 R46 A2 R47 B5 R48 B5 R49 A2 R50 B3 R51 B4 R52 B4 R53 B4 R54 B4 R55 B4 R56 B4 R57 C3 R58 A2 R59 A3 R60 B3 R61 B3 ...

Page 32: ...3 17 PRINTED CIRCUIT BOARD MAIN ...

Page 33: ...3 18 POWER ...

Page 34: ...9 D5 J840 C3 J841 D4 J842 F5 J843 F5 J844 F3 J845 F3 J847 E3 J848 E3 J849 E3 J850 E3 J851 G4 J854 D4 J857 C5 J858 D5 J860 D1 J863 C5 J864 G3 J865 F3 J868 G2 J873 C3 J875 C2 J877 D1 J879 C3 J882 D5 J885 D3 J887 C3 J901 B4 J902 A4 J903 B4 JK25J B1 JP1 B2 JP2 B5 JP3 C2 JP4 C1 JP5 C1 JP6 E1 JP7 E1 L733 E4 L734 E5 L782 E4 L801 D1 L802 D1 L851 D2 L901 A5 L902 A5 L01F D4 L01J B3 L02J B3 L03J A3 L04J B3 L...

Page 35: ...KE KL KF 14P2BX GX PX SX MODEL KB KE KL KF 20 21P30X CONTENT Deck Mechanism Disassembly 4 1 Mechanism Adjustment 4 15 Maintenance Inspection Procedure 4 22 Mechanism Troubleshooting Guide 4 26 Exploded Views 4 31 SECTION 4 MECHANISM PART TVCR SERVICE MANUAL ...

Page 36: ... Hole A 2 4 Guide CST 2 Hooks A 2 2 3 4 5 Bracket Side L 1 Screw A 2 2 3 4 6 BracketAssembly Door 1 Screw A 2 2 3 4 5 6 7 ArmAssembly F L Chassis Hole A 2 2 3 4 5 8 LeverAssembly S W Chassis Hole A 2 9 ArmAssembly Cleaner Chassis Embossing A 3 10 Head F E 2 Hooks A 3 11 BaseAssemblyA C Head 1 Screw A 3 12 BrakeAssembly S Chassis Hole A 4 2 3 13 BrakeAssemblyT Chassis Hole A 4 2 3 12 14 ArmAssembly...

Page 37: ...cket Side L 1 Screw A 2 2 3 4 6 BracketAssembly Door 1 Screw A 2 2 3 4 5 6 7 ArmAssembly F L Chassis Hole A 2 2 3 4 5 8 LeverAssembly S W Chassis Hole A 2 9 ArmAssembly Cleaner Chassis Embossing A 3 10 Head F E 2 Hooks A 3 11 BaseAssemblyA C Head 1 Screw A 3 12 BrakeAssembly S Chassis Hole A 4 2 3 13 BrakeAssemblyT Chassis Hole A 4 2 3 12 14 ArmAssemblyTension Chassis Hole A 4 2 3 12 14 15 Reel S ...

Page 38: ...ook the H1 on the back side of the Chassis and separate the Cap FPC 2 Remove three Screws S1 and lift up the Drum Assembly 3 Remove two Screws S2 and Separate the Stator of Drum Motor 4 Remove two Screws S3 and Separate the Rotor of Drum Motor from the Drum Sub Assembly 1 When reassembling Cap FPC two Holes of Drum FPC are inserted to the two Bosses of Holder FPC correctly Refer to Fig B 1 Fig A 1...

Page 39: ...Assembly F L Lever Assembly S W Bracket Side L H5 H3 Groove Guide CST Gear Rack F L Groove For Jog Shuttle Models H4 Bracket Assembly Door S4 S4 Arm F L Holder Assembly CST Lever Stopper R Fig A 2 Fig A 2 1 Fig A 2 2 Fig A 2 6 Fig A 2 7 Fig A 2 5 Fig A 2 3 Fig A 2 4 ...

Page 40: ... above No 1 and disassemble the Guide CST in the direction of the arrow 5 Bracket Side L Fig A 2 4 Bracket Assembly Door Fig A 2 5 1 Remove the Screw S4 and disassemble the Bracket Side L in the front 2 Remove the Screw S4 and disassemble the Bracket Assembly Door in the front 6 Arm Assembly F L Fig A 2 6 1 Push the Arm Assembly F L to the left and lift up it 1 When reassembling confirm that the G...

Page 41: ...and lift up the Arm Assembly Cleaner 9 Head F E Fig A 3 2 1 Unhook the two Hooks H1 on the back side of the Chassis and lift up the Head F E 10 Base Assembly A C Head Fig A 3 3 1 Remove the Screw S5 and lift up the Base Assembly A C Head NOTE DECK MECHANISM DISASSEMBLY H1 Head F E Arm Assembly Cleaner A S5 Base Assembly A C Head For Jog Shuttle Models Fig A 3 Fig A 3 1 Fig A 3 3 Fig A 3 2 Spring L...

Page 42: ... direction and then lift up the Brake Assembly T 1 When reassembling be careful not to change the Spring with above No 11 Refer to Fig B 2 13 Arm Assembly Tension Fig A 4 3 1 Remove the Spring Tension 2 Hold the C part shown above Fig A 4 3 and turn to the clock wise direction and then lift up theArmAssembly Tension 1 When reassembling be careful not to change the Spring with above No 11 12 Refer ...

Page 43: ...bossing of the Chassis in the counterclockwise direc tion and lift up the Base Assembly P4 17 Opener Lid Fig A 5 3 1 Break away the C Part of the Opener Lid from the Embossing of the Chassis in the Clockwise direction and lift up the Opener Lid 18 Arm Assembly T up Fig A 5 4 1 Just lift up the Arm Assembly T UP 1 When reassembling confirm the opener lid is placed on the Hook H1 of the Arm Assembly...

Page 44: ...n 1 When reassembling Confirm the A B parts of Motor Capstan is located to the A B of the Chassis 21 Clutch Assembly D33 K Fig A 6 3 1 Remove the Washer W1 and lift up the Clutch Assembly D33 K 22 Lever F R Fig A 6 4 1 Unhook the H1 shown above Fig A 6 4 and lift up the Lever F R 1 When reassembling move the C part of the Lever F R up and down then confirm if it is returned to original position 23...

Page 45: ...d lift up the Bracket Assembly Jog 25 Guide Rack F L Fig A 7 2 Gear Rack F L Fig A 7 3 1 Remove the Screw S4 and lift up the Guide Rack F L 2 Lift up the Gear Rack F L 26 Brake Assembly Capstan Fig A 7 4 4HD model option 1 Hook the Spring Capstan on the Hook H1 2 Unhook the Hook H2 and lift up the Brake Assembly Capstan Refer to Fig to the right 1 When reassembling confirm that the Hole A of the B...

Page 46: ...t up the Gear Connector 1 When reassembling confirm that the Hole A of the Gear Connector is aligned to the Hole A of the Chassis Fig A 8 3 2 When reassembling confirm that the Hole B of the Gear Cam is aligned to the Hole B of the Chassis Fig A 8 2 3 When reassembling confirm that the C part of the Gear Cam is aligned to the D part of the Gear Drive as shown Fig B 3 28 Bracket Assembly L D Motor ...

Page 47: ... 2 Plate Slider Fig A 9 3 Lever Tension Fig A 9 4 1 Remove the Screw S4 and lift up the Base Tension 2 Lift up the Plate Slider 3 Hold the A Part of the Lever Tension and turn to the counterclockwise direction and then lift up the Lever Tension 1 When reassembling turn the Lever Tension to the clock wise direction in maximum 2 Push the plate slide right side to be guided by the shaft NOTE Fig A 9 ...

Page 48: ... 10 4 1 Move the Base Assembly P3 in the direction of the arrow of the Chassis Hole A and push down the BaseAssembly P3 2 Move the Base Assembly P2 in the direction of the arrow of the Chassis Hole B and push down the BaseAssembly P2 33 Arm Assembly Idler or Arm Assembly Idler Jog Fig A 10 5 1 Unhook the Hook H3 and push down the Arm Assembly Idler Jog 1 Arm Assembly Idler is for Normal Models 2 A...

Page 49: ...00 D006 4 Torque gauge adaptor Parts No D09 R001 5 Post height adjusting driver Parts No DTL 0005 6 Type driver ø 5 2 Alignment tape Parts No NTSC DTN 001 PAL DTN 0002 3 Torque gauge 3 600g Cm ATG 3 Parts No D00 D002 SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 ...

Page 50: ... until the Alignment is as below Fig C 2 4 Remove the Screw which fixes the Deck Mechanism and Main Frame and confirm if the Gear Cam is aligned with the Gear Drive as below Fig C 1 A 5 Confirm if the Mode S W on the Main P C Board is aligned as below Fig C 1 B 6 Remount the Deck Mechanism on the Main P C Board and check each operation Mode S W Gear Cam Gear Drive A B L D Motor Assembly Gear Cam H...

Page 51: ...ise until the Alignment is as below Fig C 2 4 Remove the Screw which fixes the Deck Mechanism and Main Frame and confirm if the Gear Cam is aligned with the Gear Drive as below Fig C 1 A 5 Confirm if the Mode S W on the Main P C Board is aligned as below Fig C 1 B 6 Remount the Deck Mechanism on the Main P C Board and check each operation Mode S W Gear Cam Gear Drive A B L D Motor Assembly Gear Ca...

Page 52: ... Adaptor with the Torque Gauge affixed The Torque reading to measure occurs when the Tape abruptly changes direction from Fast Forward of Rewind Mode when quick bracking is applied to both Reels SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 Test Equipment Fixture Torque Gauge 600g cm ATG Torque Gauge Adaptor Cassette Torque Meter SRK...

Page 53: ...velope CH 2 NTSC SW 30Hz PAL SW 25Hz Head Switching Output Point RF Envelope Output Point Test Conditions VCR VCP State Play an Alignment Tape Adjustment Point Guide Roller Height Adjustment Screws Fig C 4 2 Fig C 4 3 P3 POST ADJUSTMENT P2 POST ADJUSTMENT Turn the Roller Guide Height Adjustment Screw slightly to flatten the waveform Tracking control at center RF ENVELOPE OUTPUT TEST POINT OSCILLOS...

Page 54: ...Screw Fig C 5 3 A C Head Tape Tape 0 2 0 25mm P4 5 1 Preliminary Adjustment Height and Tilt Adjustment Perform the Preliminary Adjustment when there is no Audio Output Signal with the Alignment Tape 1 Initially adjust the Base Assembly A C Head as shown Fig C 5 1 by using the Height Adjustment Screw B 2 Play a Blank Tape and observe if the Tape passes accu rately over the A C Head without Tape Cur...

Page 55: ...ly adjust the Azimuth Adjustment Screw A and the Tilt Adjustment Screw C for Maximum Output of the 1Khz and 7Khz segments while maintaining the flattest Envelope differential between the two Frequencies Adjustment Procedure 5 3 Precise Adjustment Azimuth adjustment 6 X Value Adjustment Fig C 5 4 1KHZ Oscilloscope Alignment tape SP only Screw Driver Type 5mm CH 1 PB RF Envelope CH 2 NTSC SW 30Hz PA...

Page 56: ... Mechanism Condition Play the blank tape Play an alignment tape Adjustment Points Guide Roller Precise Adjustment Switching Point Tracking Preset X Value Checking Adjustment Procedure Play a blank tape and check for tape curling or creasing around the roller guide If there is a problem then follow the procedure 4 Guide Roller Height and 5 Audio Control A C Head Adjustment RF ENVELOPE OUTPUT TEST P...

Page 57: ... head Dirt on pinch roller If locations marked with o do not operate normally after cleaning check for wear and replace See the EXPLODED VIEWS at the end of this manual as well as the above illustrations See the Greasing Page 4 22 for the sections to be lubricated and greased NOTE o o o o Dirt on video head Dirt on tape transport system Low volume Sound distorted Tape does not run Tape is slack o ...

Page 58: ...ol head Dirt on pinch roller If locations marked with o do not operate normally after clean ing check for wear and replace See the EXPLODED VIEWS at the end of this manual as well as the above illustrations See the Greasing Page 4 22 for the sections to be lubricated and greased NOTE o o o o Dirt on video head Dirt on tape transport system Low volume Sound distorted Tape does not run Tape is slack...

Page 59: ...tch with Isopropyl Alcohol Touch the cleaning patch to the head tip and gently turn the head rotating cylinder right and left Do not move the cleaning patch vertically Make sure that only the buckskin on the cleaning patch comes into contact with the head Otherwise the head may be dam aged Thoroughly dry the head Then run the test tape If lso propyl Alcohol remains on the video head the tape may b...

Page 60: ...ssembly F L U Groove 4 Arm Take up Rubbing Section 5 L D Motor Worm Wheel Part 6 Shaft 7 Arm Assembly F L of Buming Inside Hole 8 Reel S T Shaft G381 Yellow 9 Brake T Groove Guide Rail Gear Assembly Up D Gear Drive Gear Sector Gear Cam Press Cam Part Cam Part Gear Part Stopper Part Bracket Side L Bracket Assembly Door 1 4 5 7 6 3 2 1 Loading Path Inside Top side 2 Shaft 3 Gear Rack F L Moving Sect...

Page 61: ...d sensor Check syscon circuit NO YES YES YES NO NO NO 1 Deck Mechanism A NO NO NO No F R modes Is the present mode F R Mode Is the mode SW assembled correctly refer to Pages 4 14 Is the normal voltage supplied to the Capstan Motor Vcc1 Vcc2 Does terminal voltage Vctl of Capstan Motor supply side more than 4V Check Servo Power Circuits Replace the Capstan Motor Does the Capstan Motor rotate Do the ...

Page 62: ...tions page 4 14 Check spring Pinch Replace Drum Motor Check Servo Syscon Check the Syscon µ COM No cassette loading Insert the cassette Check Cassette Carry Assembly Is there variation for F L S W Output In Tape with REC Tab L H L In Tape without REC Tab L H L H Does the F L S W work normally Does the lever S W work normally Check Syscon Circuit Check Syscon Circuit Replace F L S W YES YES YES YES...

Page 63: ...ensors ok Check Syscon Circuit Check Syscon Circuit Check Servo Syscon Does the Capstan Motor turn Is the terminal voltage of the Drum Motor more than 2 3V Replace the Drum Motor Is the Vcc voltage of the Drum Motor normal Check the clutch and the Idler Assembly YES YES YES YES YES YES YES YES NO NO NO NO NO Is the terminal voltage of Capstan Motor supplied more than 4V Replace the Capstan Motor I...

Page 64: ...Board 5V YES Is there a short circuit between cassette switch and GND on main P C Board Remove the short circuit part or Replace the main P C Board NO Check Mode switch location and syscon circuit Replace F L Switch YES NO YES NO NO Replace F L Switch NO NO Cassette will not eject Does the L D motor rotate in reverse Check L D Motor or Drive IC Replace lever Switch Does the Lever Switch work YES N...

Page 65: ...m Assembly F L Check the power of L D Motor Is the Holder Assembly Cassette assembled correctly Replace the Rear Rack F L Does the Gear Rack F L work Does the Opener Door work Does the Arm Assembly F L work Does the L D Motor work Does the Holder Assembly Cassette move the Arm Assembly F L Replace the Front Loading Mechanism Assembly YES YES YES YES NO NO NO YES NO YES NO YES NO C ...

Page 66: ...4 31 EXPLODED VIEWS 101 426 103 117 104 105 100 110 115 116 112 113 114 032 109 108 426 A22 A23 A21 A24 107 106 1 Front Loading Mechanism Section ...

Page 67: ...03 009 025 026 027 A04 011 031 018 019 021 020 029 003 003 003 004 409 016 O p t i o n a l P a r t s O p t io n a l P a r t s O n l y f o r V C R M o d e l s Only for 4HD Hi Fi Models Only for 4HD Mono Models Only for 2HD Models Optional Parts Only for Jog shuttle Models For Normal Models 2 Moving Mechanism Section 1 ...

Page 68: ... 065 A11 068 069 070 079 426 064 518 052 055 518 517 061 062 062 060 063 519 051 059 A14 058 Optional Parts O p ti o n a l P a r ts Only for 4HD Models O n ly f o r N o m a l M o d e ls O n ly f o r H i R e w in d M o d e ls Optional Parts Only for Jog Shuttle Models 3 Moving Mechanism Section 2 ...

Page 69: ...CHASSIS MV 995B MODEL KB KE KL KF 14P2B G P S MODEL KB KE KL KF 14P2BX GX PX SX MODEL KB KE KL KF 20 21P30X CONTENT MECHANICAL PARTS 5 2 ELECTRICAL PARTS 5 4 SECTION 5 RPL TVCR SERVICE MANUAL ...

Page 70: ...R 0029A A00 A01 A02 A03 A04 A11 A12 A21 A22 A23 A24 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 031 032 051 052 053 054 055 056 057 060 061 062 063 064 065 066 067 DECK ASSY DRUM CIRC ASSY ARM ASSY ARM ASSY BRACKET ASSY GEAR ASSY GEAR ASSY HOLDER ASSY BRACKET ASSY ARM ASSY LEVER ASSY BASE ASSY BASE ASSY BASE ASSY OPENER BASE ASSY REEL SPRING BRAKE ASSY SPRING BRAKE ASSY...

Page 71: ...5 106 107 108 109 110 111 112 113 114 115 116 401 406 407 409 410 426 504 517 518 GEAR SPRING LEVER PLATE LEVER BASE PLATE ASSY BRACKET HOLDER GUIDE HOLDER HOLDER LEVER BRACKET OPENER ARM SPRING BODY SPRING ARM SPRING LEVER PAN HEAD MACHINE SCREW PAN HEAD MACHINE SCREW S W SCREW TAP TITE B PAN HEAD PAN HEAD MACN SCREW S P WASH SCREW TAP TITE B PAN HEAD SCREW MACHINE WASHER WASHER WASHER P2 L D P2 ...

Page 72: ...HIP 2SC3875S ALY KEC TR CHIP KRC102S SOT 23 TP KEC TR CHIP 2SC3875S ALY KEC TR CHIP 2SC3875S ALY KEC TR CHIP KRC102S SOT 23 TP KEC TR CHIP 2SC3875S ALY KEC TR CHIP 2SC3875S ALY KEC LOCA NO PART NO DESCRIPTION IC01 IC01S IC02 IC03 IC04 IC05 IC06 IC100 IC101 IC200 IC201 IC202 IC301 IC500 IC601 IC701 IC801 IC802 IC803 IC851 20 IC852 IC853 IC855 IC856 IC857 IC901 D01 D02 D03 D04 D05 D07 D18 D20 D21 D2...

Page 73: ... KEC TR KTA968A Y KEC 15P 50V J 470P 50V K B TA52 100UF STD 16V M 33UF SRE 16V M 100P 50V K B TA52 22000P 25V Z FTA52 2 2000UF STD 50V M 22UF SRE 16V M LOCA NO PART NO DESCRIPTION C10 C11 C12S C14S C16 C16S C17S C19S C24J C26J C32 C36 C37 C38 C39 C45 C47 C48 C50 C51 C52 C53 C54 C55 C56 C58 C61 C63 C72 C73 C74 C80 C84 C85 C88 C100 C101 C105 C106 C108 C111 C114 C115 C118 C119 C120 C122 C127 C130 C13...

Page 74: ...1 C532 C534 C536 C540 C541 C544 C545 C546 C547 C548 C601 C602 C603 C604 C605 C606 C607 C608 C609 C610 C701 C702 C703 C704 C705 C706 C708 C709 C731 C732 C733 C734 C736 C738 C739 C741 C743 C781 20 0CE107DF618 0CE475DK618 0CE225DK618 0CE476DF618 181 007F 0CE107DF618 181 007F 181 007C 0CE104DK618 0CE1074F618 0CQ4731N509 0CQ1041N509 0CC6200K415 0CQ1021N509 0CE104DK618 0CE225DK618 0CE105DK618 0CE684DK61...

Page 75: ...L902 L01J L01S L01 L02J L02S L02 L03J L03 L04 L05J L05 L06 L07 L10 L11 L12 L13 L101 L102 L103 L104 L105 L106 L107 L108 L144 L200 L201 L203 L204 L205 L206 L207 L209 L21J L22J L23J L25J L300 L301 L302 L303 L306 L307 L309 L391 L500 L501 125 022K 125 022K 125 022K 125 022K 125 022K 0LA0102K119 0LA0222K119 0LA1000K139 0LA0102K119 0LA0222K119 0LA1000K139 0LA0102K119 0LA1000K139 0LA1000K139 0LA0101K119 0...

Page 76: ...24J R25J R26J R27J R22 R23 R24 R25 R26 R27 R28 R31 R33 R38 R42 R43 R45 R46 R55 R57 R59 R67 R68 R69 R74 R77 R90 R92 R97 R98 R99 R101 R102 R109 R110 R112 R125 R128 R144 R146 R147 R148 R149 R153 R154 R205 R208 R214 0RD2200F609 0RD5601F609 0RD1001F609 0RD1001F609 0RD2200F609 0RD1000F609 0RD2203F609 0RD0472F609 0RD2000F609 0RD2000F609 0RD4300F609 0RD2200F609 0RD2200F609 0RD2200F609 0RD2200F609 0RD2200F...

Page 77: ...R783 20 R784 R785 R786 R787 20 21 R788 R801 R805 R806 R807 R808 R809 R810 R811 R812 R813 R816 R821 R822 R823 R824 R825 R851 R852 R853 R854 R855 R856 R857 R858 R860 R865 R866 R867 R870 R871 R872 R873 R874 R901 R902 R903 R904 R905 R906 R907 R908 R909 R910 0RN3901F409 0RD0392H609 0RD3301H609 0RS5601K607 0RS4701K607 0RD4700F609 180 B01M 0RS1801J607 0RS6801K607 0RS2701K607 0RS3301K607 0RD0912F609 180 A...

Page 78: ...4T L05T L06T L07T L08T Q01T Q02T Q03T Q04T Q05T X01T A1 A1 A1 A1 A2 A2 A3 A3 F801 JK05J JK25J LD03 TH801 21 TU100 RC01 S01 S02 S03 S04 SG901 SG902 SK200 SK901 SK902 0CE4763F618 0CE4763F618 0CE4763F618 181 007G 0ISG111733B 0ISG111725B 0IFA752700A 0ISM555000B 6210TCE001G 6210TCE001G 6210TCE001G 6210TCE001G 6210TCE001G 6210TCE001G 0LA0102K119 0TR387500AA 0IFA270000A 0TR387500AA 0IFA270000A 0TR387500A...

Page 79: ...PB A REC A PB V REC V P No 3854VA0070A S Date 2001 02 10 CIRCUIT DIAGRAM OF MV 995B ...

Page 80: ...P No 3854VA0060B 2 2 Date 2000 4 6 ...

Page 81: ...Apr 2001 Printed in Korea P NO 3828VD0067C ...

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