Mitsubishi Electric HS-U449 Service Manual Download

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SPECIFICATIONS

Tape Format

Power Source
Power Consumption
Video Signal System
Video Recording System

Luminance
Color Signal

Hi-Fi Audio

Recording System

Linear Audio Track
Tape Speed

Record/Playback Time

Record/Playback System

Video
Hi-Fi Audio
Monaural Audio Control
Erase

Video Input

Audio Input

Video Output

Audio Output

Tuner

VHF
UHF
CATV

Operating Temperature
Relative Humidity
RF Channel Output
Weight
Dimensions

Timer Program Capacity

Deck

: VHS 1/2” high-density video

cassette tape

: 120 V AC ; 60 Hz
: Approx. 20 W (STBY 3 W)
: EIA standard ; NTSC color
: VHS standard
: Frequency modulation recording
: Low frequency conversion

sub-carrier phase shift recording

: VHS standard

Azimuth helical scanning system

: 1 track
: 1-5/16 i.p.s (standard play)

7/16 i.p.s (extended play)

: 120 min. with T-120 video cassette

(SP mode)
360 min. with T-120 video cassette
(EP mode)

: 4 heads
: 2 heads
: 1 head
: 1 head

: 0.5 - 2.0 V(p-p), 75

Ω

unbalanced

RCA Pin Jack

: 346 mV(rms), 47 k

Ω

unbalanced

RCA Pin Jack

: 1.0 V(p-p), 75

Ω

unbalanced

RCA Pin Jack

: 346 mV(rms), 1 k

Ω

unbalanced

RCA Pin Jack

: 54 - 88 MHz, 174 - 216 MHz
: 470 - 806 MHz
: 54 - 88 MHz, 90 - 804 MHz
: 41 - 104°F
: 30 - 80%
: Channel 3 or 4 switchable
: Approx. 8.0 lbs. (3.6 kg)
: 16.7”(W)

3.7”(H)

11.9”(D)

425 (W)

93 (H)

302 (D) mm

: 1 month programmable

/ 8 programs

Deck

• Weight and dimensions shown are approximate.
• Design and specifications are subject to change without notice.

Only cassettes marked VHS can be used with this video cassette recorder.

2003

VIDEO CASSETTE RECORDER

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

9351 Jeronimo Ave. Irvine, California 92618 U.S.A.

MODEL

HS-U449

Summary of Contents for HS-U449

Page 1: ... i p s standard play 7 16 i p s extended play 120 min with T 120 video cassette SP mode 360 min with T 120 video cassette EP mode 4 heads 2 heads 1 head 1 head 0 5 2 0 V p p 75 Ω unbalanced RCA Pin Jack 346 mV rms 47 kΩ unbalanced RCA Pin Jack 1 0 V p p 75 Ω unbalanced RCA Pin Jack 346 mV rms 1 kΩ unbalanced RCA Pin Jack 54 88 MHz 174 216 MHz 470 806 MHz 54 88 MHz 90 804 MHz 41 104 F 30 80 Channel...

Page 2: ...RAKE SPRING CAPSTAN BRAKE ASSY 11 2 16 FC HOLDER MOTOR HOLDER LOADING WORM LOADING MOTOR ASSY WORM WHEEL 12 2 17 PINCH ARM CAP PINCH UNIT 13 2 18 F L PLATE DOOR ARM 13 2 19 BRAKE CAM PLATE 14 2 20 GUIDE LAMP 15 2 21 MAIN CAM GUIDE ARM TU BRAKE LEVER LB PIN 16 2 22 L D LOCK LEVER 17 2 23 BRAKE BELT SP BELT HOLDER 17 2 24 BELT LEVER BELT ADJUSTER 18 2 25 TENSION ARM TENSION LEVER TENSION SPRING TENS...

Page 3: ... 3 5 Tape wrinkle check 34 4 Servicing Tape Jam during the Loading Process 35 SERVICE CAN BE EXECUTED WITH THE EE PICTURE DISPLAYED 36 DECK OPERATION CHECK 36 FILE PARTSLST Parts List 1 1 CABINET ASSEMBLY 2 1 CABINET ASSEMBLY LIST 3 2 PACKING PARTS 4 2 PACKING PARTS LIST 5 3 ELECTRICAL PARTS 6 FILE DECKASSY DECK ASSEMBLY 1 1 DECK ASSEMBLY 1 LIST 2 DECK ASSEMBLY 2 4 DECK ASSEMBLY 2 LIST 5 FILE SCHE...

Page 4: ...SET Clock VSET Chip Select Y Luminance Signal Noise Reduction Audio Control Audio Play Back Audio Recording Audio Erase Audio Envelope Automatic Frequency Control Audio Flip Flop Auto Fine Tuning Voltage Automatic Level Control Audio Mode Amplifier Alternating Current Ground Automatic Phase Control Auto Fine Attenuator Blue Back Mute Carrier Noise Ratio Charge Coupled Device Character Generator Ch...

Page 5: ...ary speaker jacks switches grounding active or passive circuitry etc or use of unauthorized camera cables accessories etc may alter the safety characteristics of this VCR and potentially create a hazardous situation for the user Any design alterations or unauthorized additions will invalidate the manufacturer s warranty and will further relieve the manufacturer of responsibility for personal injur...

Page 6: ...check and leakage current hot check performed PRECAUTIONS Handling and storage Avoid using the VCR in the following places extremely hot cold or humid places dusty places near appliances generating strong magnetic fields places subject to vibration poorly ventilated areas Be careful of moisture condensation If you pour a cold liquid into a glass water vapor in the air will condense on the surface ...

Page 7: ...N This terminal may also be labeled VHF IN If you have an older TV without this kind of terminal you will have to use a splitter and then connect the splitter to the television Now that you ve completed the antenna connections to your VCR you re ready to connect the VCR to the TV Because every television is different especially older model TVs your VCR may need to be connected in a variety of ways...

Page 8: ... remove the Top Cover in the direction shown by arrow 2 Removal of Front Panel 1 Remove the Top Cover Refer to Para 1 of the DISASSEMBLY 2 Unfasten the seven catches b shown in Fig 1 and remove the Front Panel in the direction shown by arrows DISASSEMBLY Top Cover a a Front Panel b b b Fig 1 ...

Page 9: ...Para 1 of the DISASSEMBLY 2 Remove the two fastening screws a shown in Fig 2 3 Turn the set upside down as shown in Fig 3 4 Slide and lift the Bottom Panel in the direction of the arrows paying attention to the five catches b to remove it Fig 2 b Bottom Panel Fig 3 ...

Page 10: ... Remove the two screws a shown in Fig 4 5 Remove the four screws b shown in Fig 5 6 Disconnect the Connectors MA MD MH and ML 7 Release the two catches c shown in Fig 5 and raise the DECK ASSY to remove it Note1 Remove the DECK ASSY paying attention to the Connectors MC and MF under it Note2 Short circuit the cathode side of D927 and the Shield Plate using the jig shown below before attaching the ...

Page 11: ...ight angles to the connector and make sure that it is completely secured After servicing the PCB restore the flat cable and leads to their former state PCB OPE PCB MAIN HOW TO EXECUTE CIRCUIT BOARD SERVICE Fig 6 a Connector OS PCB OPE Fig 7 1 PCB OPE 1 Remove the Top Cover Refer to Para 1 of the DISASSEMBLY 2 Remove the Front Panel Refer to Para 2 of the DISASSEMBLY 3 Remove the Connector OS 4 Rem...

Page 12: ...lease the two fastening catches b shown in Fig 8 Raise the PCB MAIN to remove it 7 Release the three catches C shown in Fig 10 and remove the Antenna Cover J J Service of PCB Head Amp block 1 Unsolder the four soldering points of the Shield Plate shown in Fig 8 and remove it Note Before checking the operation mount the Shield Case and the Shield Plate on the original position If not provided beat ...

Page 13: ...ge the Chip Parts when soldering G Supplementary cementing is not required 1 Removal of Chip Parts Resistors capacitors etc A Grasp the part with tweezers Melt the solder at both sides alternately remove one side of the part with a twisting motion B Melt the solder at the other side and remove the part 2 Removal of Chip Parts Transistors A Melt the solder of one lead Lift the side of that lead upw...

Page 14: ...hol on the HEADs may damage the tape if not dried completely MECHANICAL ADJUSTMENT AND REPLACEMENT 1 2 Tape Running System Clean the following parts of the Tape Running System 1 TENSION PIN 2 F E HEAD 3 SLANT POLE SP 4 SLANT POLE TU 5 A C HEAD 6 GUIDE POLE TU 7 PINCH ROLLER 8 GUIDE PIN TU 9 GUIDE ROLLER SP 10 UPPER LOWER DRUM ASSY 11 GUIDE ROLLER TU 12 CAPSTAN SHAFT 1 Clean the Tape Running System...

Page 15: ... Release the two catches a of the CLEANING ARM shown in Fig 2 1 to remove the CLEANING ARM Installation 1 Install the CLEANING ARM shown in Fig 2 1 2 2 STAY PLATE SET POSITION Normal Removal 1 Remove the two screws a fastening the STAY PLATE shown in Fig 2 2 to remove the STAY PLATE Installation 1 Install the STAY PLATE shown in Fig 2 2 ...

Page 16: ...h the hole in the MAIN PLATE ASSY 2 Lift the BOTTOM ASSY in Fig 2 3 1 in the direction shown by arrow B and remove in the direction shown by arrow C Installation 1 Apply grease MULTEMP AC DM 859D055O90 to the grooves of the MAIN PLATE ASSY shown in Fig 2 3 2 2 Apply grease MULTEMP AC DM 859D055O90 to the bosses of the BOTTOM ASSY shown in Fig 2 3 2 3 Rotate the WORM WHEEL shown in Fig 2 3 1 so tha...

Page 17: ...g the INSERT GUIDE TU shown in Fig 2 4 to remove the INSERT GUIDE TU Installation 1 Install the INSERT GUIDE TU shown in Fig 2 4 2 5 INSERT GUIDE SP DECK POSITION Normal Remove the following parts before replacing the INSERT GUIDE SP Refer to the corresponding items to install them STAY PLATE Item 2 2 BOTTOM ASSY Item 2 3 Removal 1 Remove the screw a fastening the INSERT GUIDE SP shown in Fig 2 5 ...

Page 18: ...DECK POSITION Normal Remove the following parts before replacing the F L ARM ASSY and F L BEARING Refer to the corresponding items to install them STAY PLATE Item 2 2 BOTTOM ASSY Item 2 3 INSERT GUIDE TU Item 2 4 INSERT GUIDE SP Item 2 5 REC HOLDER Item 2 6 Removal 1 Release the catch a of the F L BEARING shown in Fig 2 7 and pull out the F L ARM ASSY in the direction shown by arrow A Note Do not ...

Page 19: ...lcohol if necessary 2 Install the LEAD CONNECTOR of the A C HEAD UNIT shown in Fig 2 8 3 Perform 3 3 A C HEAD Adjustment and 3 4 Phase Adjustment of 3 Interchangeability Adjustment of the Mechanism 2 9 F E HEAD DECK POSITION Normal Removal 1 Lift the F E HEAD shown in Fig 2 9 1 in the direction shown by arrow A to remove it Note Be sure to replace the removed F E HEAD with a new one Installation 1...

Page 20: ...ENSOR COVER TU Installation 1 Install the SENSOR COVER TU shown in Fig 2 10 2 11 SENSOR COVER SP DECK POSITION Normal Removal 1 Remove the catch a of the SENSOR COVER SP shown in Fig 2 11 to remove the SENSOR COVER SP Installation 1 Install the SENSOR COVER SP shown in Fig 2 11 a SENSOR COVER TU Fig 2 10 a SENSOR COVER SP Fig 2 11 ...

Page 21: ...all the REV UNIT TU shown in Fig 2 12 3 Clean dirt on the transparent part of the REV UNIT SP with a VIDEO HEAD cleaning cloth Note Never use solvent such as alcohol to clean the REV UNIT SP 4 Install the REV UNIT SP shown in Fig 2 12 2 13 MODE POSITION UNIT DECK POSITION Upside down Removal 1 Release the two catches a and b of the MODE POSITION UNIT shown in Fig 2 13 to remove the MODE POSITION U...

Page 22: ...BUSH Note Be sure to replace the removed PULLEY BUSH with a new one 4 Remove the units from the THRUST WASHER to the IDLER 2 UNIT shown in Fig 2 14 1 Installation Note Be careful not to apply grease and oil to the felt side of the PULLEY GEAR ASSY or the grooved side of the SLIP GEAR shown in Fig 2 14 4 1 Apply oil FLOIL 948P 859D154O20 to the SHAFT for the IDLER 2 UNIT shown in Fig 2 14 1 2 Apply...

Page 23: ...SHER SLIP GEAR side THRUST WASHER side Straight end Fig 2 14 5 9 Install the units from the SLIP WASHER to the REEL BELT shown in Fig 2 14 1 Note1 Be sure to replace the removed PULLEY BUSH with a new one Note2 Attach the SLIP SPRING with its straight end facing the SLIP GEAR side Note3 Attach the SLIP WASHER in the orientation shown in Fig 2 14 5 Note4 Apply grease PG 641 859D055O30 to the specif...

Page 24: ...AKE SPRING shown in Fig 2 15 2 Remove the catch a of the CAPSTAN BRAKE ASSY shown in Fig 2 15 to remove the CAPSTAN BRAKE ASSY Installation 1 Install the CAPSTAN BRAKE ASSY shown in Fig 2 15 2 Install the CAPSTAN BRAKE SPRING shown in Fig 2 15 a CAPSTAN BRAKE ASSY CAPSTAN BRAKE SPRING CAPSTAN MOTOR Fig 2 15 ...

Page 25: ... MOTOR HOLDER shown in Fig 2 16 1 to remove the MOTOR HOLDER 3 Remove the two screws c fastening the LOADING MOTOR ASSY shown in Fig 2 16 1 to remove the LOADING MOTOR ASSY and LOADING WORM 4 Remove the WORM WHEEL Installation 1 Apply grease MULTEMP AC DM 859D055O90 to the LOADING WORM shown in Fig 2 16 2 2 Apply grease MULTEMP AC DM 859D055O90 to the WORM WHEEL shown in Fig 2 16 2 3 Install the W...

Page 26: ... CAM 2 Install the PINCH ARM CAP aligning Part B of the PINCH ARM CAP with the rib of the MAIN PLATE ASSY 2 18 F L PLATE DOOR ARM DECK POSITION Normal Remove the following parts before replacing the F L PLATE and DOOR ARM Refer to the corresponding items to install them STAY PLATE Item 2 2 BOTTOM ASSY Item 2 3 SENSOR COVER TU Item 2 10 MOTOR HOLDER Item 2 16 PINCH ARM CAP Item 2 17 PINCH UNIT Item...

Page 27: ...fore replacing the BRAKE CAM PLATE Refer to the corresponding items to install them STAY PLATE Item 2 2 BOTTOM ASSY Item 2 3 MOTOR HOLDER Item 2 16 PINCH ARM CAP Item 2 17 PINCH UNIT Item 2 17 Removal 1 Release the boss of the F L PLATE from the groove in the MAIN CAM by lifting the F L PLATE shown in Fig 2 18 2 2 Rotate the MAIN CAM in Fig 2 19 1 in the direction shown by arrow A Move the BRAKE C...

Page 28: ... 2 17 BRAKE CAM PLATE Item 2 19 Removal 1 Release the catch a of the GUIDE LAMP shown in Fig 2 20 2 Rotate the GUIDE LAMP in the direction shown by arrow A counterclockwise when viewed from the bottom to align the longest slit c of the MAIN PLATE ASSY with the longest arm b of the GUIDE LAMP shown in Fig 2 20 Pull it out downward to remove it Installation 1 Clean dirt on the GUIDE LAMP with a VIDE...

Page 29: ...g 2 21 1 2 Apply grease MULTEMP AC DM 859D055O90 to the specified parts on the new GUIDE ARM TU in Fig 2 21 1 3 Apply grease MULTEMP AC DM 859D055O90 to the specified parts on the MAIN PLATE ASSY in Fig 2 21 1 4 Install the GUIDE ARM TU aligning the hole in the GUIDE ARM TU shown in Fig 2 21 2 with the hole in the MAIN PLATE ASSY Note Install the GUIDE ARM TU so that the part specified with obliqu...

Page 30: ...PLATE Item 2 2 BOTTOM ASSY Item 2 3 Removal 1 Lift the BRAKE BELT SP shown in Fig 2 23 to remove it from the REEL DISK SP side 2 Release the BRAKE BELT SP from the catch a of the BELT LEVER shown in Fig 2 23 3 Release the two catches b of the BELT HOLDER shown in Fig 2 23 and separate the BELT HOLDER from the BRAKE BELT SP 4 Release the catch c of the BELT HOLDER shown in Fig 2 23 to remove the BR...

Page 31: ...allation 1 Install the BELT ADJUSTER shown in Fig 2 24 2 Install the BELT LEVER shown in Fig 2 24 2 25 TENSION ARM TENSION LEVER TENSION SPRING TENS AXIS HOLDER REEL DISK SP side DECK POSITION Normal Remove the following parts before replacing the above mentioned components Refer to the corresponding items to install them STAY PLATE Item 2 2 BOTTOM ASSY Item 2 3 MOTOR HOLDER Item 2 16 PINCH ARM CA...

Page 32: ... Fig 2 26 to remove it from the REEL DISK TU side 2 Release the two catches a of the BRAKE TU shown in Fig 2 26 to remove the BRAKE BELT TU Installation 1 Install the BRAKE BELT TU shown in Fig 2 26 to the BRAKE TU 2 Hook the BRAKE BELT TU shown in Fig 2 26 to the REEL DISK TU side Note Install the BRAKE BELT TU so that its felt side touches the REEL DISK TU side 2 27 BRAKE TU REEL DISK TU side DE...

Page 33: ... 2 BOTTOM ASSY Item 2 3 MOTOR HOLDER Item 2 16 PINCH ARM CAP Item 2 17 PINCH UNIT Item 2 17 BRAKE CAM PLATE Item 2 19 BRAKE TU Item 2 27 REEL DISK TU side Item 2 27 Removal 1 Move the SHIFT SLIDER in Fig 2 28 in the direction shown by arrow A to release it from the SHIFT LEVER 2 Move the SHIFT LEVER in Fig 2 28 in the direction shown by arrow B to remove it Installation 1 Apply grease MULTEMP AC D...

Page 34: ...IN PLATE ASSY to remove the CHARGE ASSY Installation 1 Apply grease MULTEMP AC DM 859D055O90 to the specified parts on the MAIN PLATE ASSY in Fig 2 29 2 Install the CHARGE ASSY 3 Install the SWING LEVER inserting Part c of the SWING LEVER in Fig 2 29 into the groove in the MAIN PLATE ASSY 4 Install the CHARGE SPRING to the SWING LEVER 2 30 SPACER PLATE LOADING ARM ASSY SP LOADING ARM ASSY TU DECK ...

Page 35: ...d each other as shown in Fig 2 30 3 Note Be sure to replace the removed LOADING ARM ASSY SP with a new one 4 Install the SPACER PLATE shown in Fig 2 30 1 2 31 A L LEVER DECK POSITION Upside down Remove the following parts before replacing the A L LEVER Refer to the corresponding items to install them STAY PLATE Item 2 2 BOTTOM ASSY Item 2 3 MOTOR HOLDER Item 2 16 PINCH ARM CAP Item 2 17 PINCH UNIT...

Page 36: ...ll the A L LEVER so that the mark on the A L LEVER faces to the flange of the LOADING ARM ASSY SP as shown in Fig 2 31 3 Note The part specified with oblique lines on the A L LEVER shall be positioned under the flange of the LOADING ARM ASSY SP 4 Install the LOADING ARM ASSY TU so that the marks on the LOADING ARM ASSY TU and the A L LEVER are aligned each other as shown in Fig 2 31 4 5 Install th...

Page 37: ...LT HOLDER Item 2 23 BELT LEVER Item 2 24 TENSION ARM Item 2 25 SPACER PLATE Item 2 30 LOADING ARM ASSY TU Item 2 30 LOADING ARM ASSY SP Item 2 30 A L LEVER Item 2 31 Removal 1 Loosen the TAPE GUIDE ASSY SP shown in Fig 2 32 1 turn it fully in the unloading direction to remove it 2 Loosen the TAPE GUIDE ASSY TU shown in Fig 2 32 1 turn it fully in the unloading direction to remove it Installation 1...

Page 38: ... the direction shown by arrow B 2 Hook the catch of the DRUM CLAMPER shown in Fig 2 33 3 to the reference pin 3 Fasten the screw b while pushing Part A in the direction shown by arrow C clockwise when viewed from the top as shown in Fig 2 33 3 Note Make sure that the catch of the DRUM CLAMPER touches the side of the reference pin 4 Fasten the screw a shown in Fig 2 33 3 Note Make sure that the cat...

Page 39: ...ig 2 34 1 2 Remove the two screws a fastening the DRUM MOTOR STATOR shown in Fig 2 34 1 to remove the DRUM MOTOR STATOR 3 Remove the two screws b fastening the ROTOR CASE shown in Fig 2 34 1 to remove the ROTOR CASE Note Mark the END RING and the UPPER DRUM ASSY shown in Fig 2 34 1 for ensuring correct positioning in re assembly 4 Loosen the hexagon screw c fastening the END RING shown in Fig 2 34...

Page 40: ...n Fig 2 34 1 5 Install the ROTOR CASE shown in Fig 2 34 3 aligning its holes with the three reference holes B of the UPPER DRUM ASSY 6 Install the BRUSH shown in Fig 2 34 1 7 Install the BRUSH SPRING shown in Fig 2 34 1 8 Install the DRUM MOTOR STATOR shown in Fig 2 34 1 9 Connect the LEAD CONNECTOR of the DRUM ASSY shown in Fig 2 34 1 10 Perform 3 Interchangeability Adjustment of the Mechanism 11...

Page 41: ...n by arrow A so that the GUIDE ARM TU moves in the direction of arrow B and expose the three screws a fastening the CAPSTAN MOTOR 3 Remove the three screws a fastening the CAPSTAN MOTOR shown in Fig 2 35 2 to remove the CAPSTAN MOTOR Installation 1 Apply silicon compound SC102 859D164O10 to the specified parts on the MAIN PLATE ASSY in Fig 2 35 3 2 Install the CAPSTAN MOTOR ...

Page 42: ...PLATE ASSY shown in Fig 3 1 1 is 0 3 0 3 mm 3 If A is not 0 3 0 3 mm move the hole in the BELT ADJUSTER in Fig 3 1 2 within the range shown by arrow A to set A to 0 3 0 3 mm 4 Set the BACK TENSION measuring jig code 859C345O80 and play back the tape 5 Confirm that A shown in Fig 3 1 1 is 0 0 0 5 mm 6 If A is not 0 0 0 5 mm repeat this adjustment from the beginning 7 Make sure that the indicated va...

Page 43: ... shown by Waveform A turn the height adjustment screw at the top of the GUIDE ROLLER SP Turn the screw counter clockwise if the position of the GUIDE ROLLER is lower than specified Turn the screw clockwise if the position of the GUIDE ROLLER is higher than specified 3 Perform 3 2 4 Coarse Adjustment of Phase 3 2 3 Height Adjustment of GUIDE ROLLER TU 1 Loosen the height adjustment screw at the top...

Page 44: ...E2 859C339O90 2 Adjust the tracking and confirm that the amplitude of the FM signal remains flat Note Press the tracing and button during play back to adjust tracking 3 Adjust the tracking so that the amplitude level of the FM waveform is at maximum Set the oscilloscope so that the amplitude level of the FM waveform is 5 divisions on the oscilloscope 4 Adjust the tracking so that the peak of the F...

Page 45: ...the FM waveform varies check the position of the A C HEAD If the A C HEAD UNIT is incorrectly installed reinstall it referring to 2 8 A C HEAD UNIT and perform 3 2 4 Coarse Adjustment of Phase 3 2 7 Tape Running Condition at the GUIDE ROLLERs Check 2 1 Play back an alignment tape NM6KE2 859C339O90 2 Make sure that the FM waveform is restored to the previous level immediately after the tops of the ...

Page 46: ...fter the adjustment remove the screwdriver and make sure that the audio output level is 4 6 or over on the oscilloscope with the maximum audio output level set to 5 If the audio output level is less than 4 6 repeat this adjustment from the beginning 6 Make sure that the audio output level doesn t vary when the A C HEAD is pushed in the horizontal direction or in the direction shown by the A A line...

Page 47: ... 8 divisions or over 11 If the FM waveform is below 4 8 divisions preset the tracking and repeat steps 3 to 10 12 Make sure that the amplitude of the FM waveform doesn t vary when the A C HEAD is pushed in the horizontal direction or in the direction shown by the A A line in Fig 3 4 1 and then released 13 If the amplitude of the FM waveform varies check the fixing position of the A C HEAD If the A...

Page 48: ...ape Jam during the Loading Process If the mechanism shall be locked because of tangled tape remove the tape by rotating the WORM WHEEL of the LOADING MOTOR shown in Fig 4 in the direction shown by arrow A WORM WHEEL A Fig 4 ...

Page 49: ...D927 Rear Side Front Side PCB MAIN Component side Check the DECK position and the operation of the Tape Running System according to the following procedure 1 Short circuit TP5T and TP5Y shown in the Fig 1 2 Initialize the E2PROM 3 Check the operation of the Tape Running System by pressing the FF button REW button on the PCB MAIN FF button For forward rotation of the CAPSTAN MOTOR REW button For re...

Page 50: ...s the RESET button after turning on the power ELECTRICAL ADJUSTMENTS Perform only the alignments required If proper equipment is not available do not attempt an alignment PRE ADJUSTMENT SETTINGS Set the PerfecTape to MANUAL mode TEST EQUIPMENT Oscilloscope 10 1 probe unless 1 1 specified Miscellaneous electrical tools ALIGNMENT TAPES NS1 Part No 859C339O00 Stair step Color Bars RF 1kHz audio SP NM...

Page 51: ...Switching noise or jitter in the playback picture TP5B TP5A VCR set up condition Using tape VCR condition Using Jig Input signal Alignment Tape NS1 stair step Playback 1 Play back an Alignment Tape NS1 stair step 2 Short circuit TP5A to TP5B 3 Push the channel up down buttons at the same time 4 Confirm that the values 55 to 75 are displayed on the fluorescent display after approx 6 seconds PCB MAI...

Page 52: ... 1 PARTS LIST ...

Page 53: ... 2 1 CABINET ASSEMBLY e w q w i r t u o 0 2 1 y ...

Page 54: ...78O40 CASSETTE DOOR ASSY 6 573D078O10 FRONT EARTH SPRING 7 701B456O50 FRONT UNIT 8 752C676O40 TIMER PANEL 9 669D500O30 SCREW 3 10 10 669D229O90 SCREW M3 0 4 46LA005 11 246C324O10 AC POWER CORD 12 761B393O10 ANTENNA COVER 3 ITEM NO PARTS NO PARTS NAME CABINET ASSEMBLY DESCRIPTION Critical Component 1 CABINET ASSEMBLY ...

Page 55: ... 4 q e 1 2 3 4 5 6 r w w 7 2 PACKING PARTS ACCESSORY ...

Page 56: ... PACKING CASE 4 ACCESSORY 5 ITEM NO PARTS NO PARTS NAME PACKING PARTS ACCESSORY DESCRIPTION 11 939P755O20 REMOTE HAND UNIT 12 243C273O30 CABLE RF 13 BATTERY 14 ACCESSORY BOARD 15 831D337O10 PACKING BAG 16 872C247O40 INSTRUCTION BOOK 17 REGISTRATION CARD 2 PACKING PARTS ...

Page 57: ...1 325C166O40 PEAKING COIL 12µH J L2A3 325C472O50 PEAKING COIL 100µH J L2A5 325C472O50 PEAKING COIL 100µH J L2A8 325C472O70 PEAKING COIL 150µH J L2V6 325C472O50 PEAKING COIL 100µH J L301 321C114O80 RF COIL 8200µH J L350 325C472O50 PEAKING COIL 100µH J L3A0 325C472O50 PEAKING COIL 100µH J L3A1 325C472O50 PEAKING COIL 100µH J L3A2 325C472O50 PEAKING COIL 100µH J L5A0 325C472O50 PEAKING COIL 100µH J L...

Page 58: ...M C908 189P215O90 AC CERAMIC CAPACITOR AC250V E2200pF M C910 172P262O50 C M P 50V 0 1µF J C912 181P742O10 ELECTROLYTIC CAPACITOR 04W 10V 1000µF M C914 172P263O00 C M P 50V 0 2µF J C915 181P355O10 ELECTROLYTIC CAPACITOR 04W 50V 1µF M C916 181P743O60 ELECTROLYTIC CAPACITOR 04W 16V 680µF M C918 181P355O60 ELECTROLYTIC CAPACITOR 04W 50V 22µF M C921 181P350O40 ELECTROLYTIC CAPACITOR 6 3V 330µF M C926 1...

Page 59: ...DECK ASSEMBLY 1 ...

Page 60: ...078 G 079 G 080 G 082 G 083 M 011 M 012 M 013 M 021 M 033 M 022 M 033 M 023 M 032 G 022 G 091 G 074 G 075 A 022 A 023 A 026 B 010 B 015 B 025 P 011 P 012 P 021 H 051 H 021 H 011 H 012 H 031 I 011 I 021 I 012 I 031 I 031 N 012 N 011 N 013 O 031 O 011 O 021 A 025 M 037 S 011 T 011 DECK ASSEMBLY DECK ASSEMBLY 1 G 072 G 072 G 089 1 2 3 4 5 6 7 8 A B C D E F G H I J K G 012 G 201 G 201 ...

Page 61: ...3 PINCH ARM CAP 1 G 065 641B908O10 K H 6 DOOR ARM 1 G 067 621C804O10 J 1 FC HOLDER 1 G 071 592B549O10 K B 3 STAY PLATE 1 G 072 640D852O20 B 1 B 2 SPACER 2 G 074 594C217O10 K E 2 TENSION LEVER 1 G 075 594C218O10 K D 1 TENSION ARM 1 G 077 594C222O10 K I 3 BRAKE LEVER 1 G 078 594C223O10 K I 6 F L PLATE 1 G 079 594C224O20 K H 2 GUIDE ARM TU 1 G 080 594C225O30 K D 4 BRAKE CAM PLATE 1 G 082 594C229O10 K...

Page 62: ...22D791O10 K D 6 BELT ADJUSTER 1 M 033 669D224O90 K F 3 H 2 SCREW M2 6 5 2 M 037 622D792O10 K C 2 TENS AXIS HOLDER 1 S 011 522B061O10 K A 3 GUIDE ROLLER SP SUPPLY 1 T 011 522B061O10 K B 3 GUIDE ROLLER TU TAKE UP 1 N 011 621C759O10 K E 1 BELT LEVER 1 N 012 622D790O10 K D 1 BELT HOLDER 1 N 013 554D103O10 K E 1 BRAKE BELT SP 1 O 011 621C760O10 K F 8 BRAKE TU 1 O 021 572D975O10 K F 8 BRAKE SPRING 1 O 0...

Page 63: ... 5 ...

Page 64: ...G 081 G 093 G 031 G 035 G 101 G 043 G 034 G 019 G 066 G 216 G 211 G 096 G 061 G 025 G 057 G 056 G 212 G 060 G 044 G 094 G 201 G 042 M 014 M 031 1 2 3 4 5 6 7 8 A B C D E F G H I M 034 G 214 G 215 DECK ASSEMBLY DECK ASSEMBLY 2 ...

Page 65: ...0 640D948O10 K B 2 PULLEY BUSH 1 G 061 640D949O10 K B 4 SLIP GEAR 1 G 066 640C189O20 K B 5 SLIP ADJUSTER 1 G 081 594C228O10 K G 4 A L LEVER 1 G 088 594C304O10 K G 2 SPACER PLATE 1 G 093 572D976O10 K E 2 CAPSTAN BRAKE SPRING 1 G 094 572D977O10 K I 6 REC SPRING 1 G 096 573D073O10 K B 4 SLIP SPRING 1 G 101 521D102O10 K B 1 REEL BELT 1 G 201 669D224O90 K G 2 I 6 SCREW 2 6 5 2 G 211 597D997O10 K B 4 SL...

Page 66: ...UHF INPUT 2 1 A IN CONV A OUT From IC3A0 SCL SDA Deck 9 8 7 6 5 4 F V IN R V IN IC5A0 MICON CH SW CONV SW Q2C0 V OUT J2A1 VIDEO OUT 14 RAG LEAD LPF U44903011 5 MS OS PCB OPE R P Y C BPF J2A1 J801 Q2V1 I2C CLK 71 I2C DATA 72 CLPF 9 31 28 Main CONV2 SW CLPF BE CK VCO X2A0 3 58MHz Q2A0 35 CCD delay 46 MIX LEVEL ADJ TRAP LPF CLAMP Y LPF 18 19 HPF ACC LPF HPF Q2A2 71 73 FBC ALC 2H L 6H L 87 92 24 TU01 ...

Page 67: ...OUT VIDEO OUT BD APC ACC DET CK 55 54 DECK 9 8 7 5 6 4 PCB MAIN Trap To TUNER Luminance Playback Chroma Playback HS U449 IC5A0 MICON Q2C0 BPF 2M LPF ACC CTL Trap fn HPF HiFi Trap CLPF Delay MAIN CONV1 MAIN CONV2 CCD LPF VCA L DET CCD 46 60 35 58 NP CHANGE 79 78 DLIM DEMO SUB LPF MAIN DEEMPH NC YNR CLAMP VIDEO ALC SQUELCH CLEAR SYNC 6dB AMP MIX AMP OUTLINE EMPH FEEDBACK CLAMP 18 19 93 87 CCD LPF 21...

Page 68: ...MA DA 6 7 5 2 1 3 1 2 MF DF FE Head A REC A PB A E FE 6 5 Audio Bias 2 A OUT1 R A OUT1 L CONV AUDIO TU01 59 53 57 F A IN R F A IN L U44903013 T350 24 OUTPUT SELECT R ch INPUT SELECT L ch INPUT SELECT NORMAL AUDIO SW L ch PNR HOLD TIMING L ch PNR SW NOISE H L 4 LINEAR REC 2 61 62 9 11 20kHz LPF L1 PB IC2A0 Linear Rec and PB R IN L IN J2A1 REAR J803 J802 J2A1 1 3 DEM BLOCK 48 43 I2C DATA 42 From IC5...

Page 69: ...2 T901 10 11 13 14 15 D920 D927 D913 D910 Q906 Q910 Q905 Q904 Q909 Q907 D918 IC901 3 1 STBY5 1 2 3 4 Photo coupler PC901 2 D908 AC 120V Q901 Q903 CP MOTOR V MOTOR V PWV SW5 STBY5 SW9 SW5 STBY5 To TUNER TU01 16 M570 M572 64 67 65 66 FLDCS Sub CLK Sub DATA Sub SI IC5A1 Memory 4 3 2 5 10 21 VDD STRB SCLK SIN SOUT IC8A0 STBY5 SG1 SG10 30V D907 CTL CTL 2 1 6 7 Control Head MA DA 33 PC0 31 PC2 D5D0 11 2...

Page 70: ...II Parts except for chips Not indicated Ceramic capacitor chip Electrolytic capacitor chip BP or NP Non polarized electrolytic capacitor chip Chips Characteristic Not indicated F or B high dielectric percentage CH SL etc Temperature compensating types 4 TP6A etc show Test Points 5 Capacitors 6 Resistors SPECIFIC SYMBOL Zener Diode Varicap Positive Thermistor Fusible Resistor Crystal unit Air Gap P...

Page 71: ...R930 Q901 C9Y1 C9Y2 PRT D901 C924 R928 D917 R927 C921 L902 C930 R926 R925 SW9V SW5V SW5V PC901 STBY5V C927 MOTORV CPMOTORV Q910 SW5V JP922 JP921 C926 T901 IC901 R906 C913 R908 R904 C910 D927 C907 R967 G12 R952 STBY5V PWV SW9V R914 D919 R910 R915 D921 Q909 Q904 R917 R911 R912 C908 R909 D920 D918 C912 Q907 R916 Q905 C916 Q906 R919 R918 C915 D907 D908 D910 C918 R922 BB R970 F901 D913 C905 R905 L901 C...

Page 72: ...9 C3E0 L3A2 C3E1 TP3X R3B8 R3G0 LIN IN LIN OUT R3A7 R3A5 R3A6 R3A4 R3C5 C3A4 C3A3 C3A7 C3B2 C3B5 C3B6 C3B7 C3E8 C3D7 TP3Y C3F3 C3F2 C3F1 R A IN L R A IN R F A IN L F A IN R A OUT L AFF A OUT R SW9V SW5V C3C3 C3C4 REC2 C3C5 C3C6 C3C7 R3B2 R3D0 C3C8 A C C3D0 R3A3 R3A2 R3A0 R3A1 R3C9 L3A0 C3D3 C3D2 C3D1 C3D5 R3C2 R3B6 C3D6 C3D8 R3C1 R3C0 C3E3 R3G1 CONV A IN C3C2 C3A2 SIF D3A2 TP3N I2C DATA I2C CLK MU...

Page 73: ...RY SEGMENT DRIVER KEY SCAN OUTPUT OSC DIMMING CIRCUIT COM DRIVER DIN DOUT CLK STB OSC K1 K2 K3 K4 VDD GND GR5 GR4 GR3 GR2 GR1 SG10 SG9 SG8 SG7 SG6 KS6 SG5 KS5 SG4 KS4 SG3 KS3 SG2 KS2 SG1 KS1 IC8A0 PT6958 ME SW5V R8A0 R8A1 TP5T STBY5V R8E0 R8E9 R8E8 S8A0 S8A1 S8A6 S8A7 D8B1 D8B0 L8A0 S810 S812 S811 R8E7 R8A4 R8E6 R8E5 R8E4 F V IN R8E3 R8E2 R8E1 DATAI TP5Y DATAO SUBCLK D8A6 F A IN L D8A5 F A IN R V8...

Page 74: ...45 K46 K47 K48 ADJ SP EP KEY NO FUNCTION REMOTE HAND UNIT DF DA 30V SW9V JP03 SW5V TP12 SIF CONV A IN L01 CONVSW C03 CHSW C12 L04 TP11 C10 C09 R03 L03 TU01 JP05 C2B9 R2B9 Q2A2 C2E9 R2B7 R2A3 JP2A3 JP2B5 TP2J TP2G TP2B TP2A TP2H TPDAT TPCLK 2H R2B1 C2H6 L2A8 JP07 JP06 C2E2 L2A3 Q356 R352 R351 Q355 JP300 C317 C300 C310 C2A7 C2A6 C2B2 C2A4 C2A3 TSREC DFF C2A2 C2A0 VENV HSEL C2G1 C2E1 C301 R301 R302 R...

Page 75: ...28 27 26 25 24 23 22 21 20 19 M56747AFP 4 6 1 5 2 3 7 Vcc GND VCTL PG FG MOTOR GND MOTOR CURRENT OUT 5V 180 180 150 0 47 0 5W 0 1µ 25V 0 1µ 25V 0 1µ 25V 150 150 0 1µ 25V 0 1µ 25V 0 1µ 25V B 0 01µ 50V CORE GND VCC VOUT VCC RL 3 2 1 AMP Limiter B P F Demodulator Integrator Comparator M37760MCH4D2GP DD DC C5S6 R5S6 R5C0 R5G6 R5G7 R5B9 R5B8 Q5B0 R5G8 C5T6 R5B2 ATFN STBY5V Q5A9 Q5A8 C5S5 C5S2 R5P3 R5R3...

Page 76: ...312 B 3 C313 B 3 C314 B 3 C315 B 3 C316 B 2 C317 B 3 C350 A 3 C357 A 3 C358 A 3 C359 A 3 C379 A 3 C3A2 B 5 C3A3 B 5 C3A4 B 5 C3A7 B 5 C3B2 B 5 C3B5 B 5 C3B6 B 5 C3B7 A 5 C3B8 B 5 C3B9 B 5 C3C0 B 5 C3C1 B 5 C3C2 B 4 C3C3 B 4 C3C4 B 4 C3C5 C 4 C3C6 B 4 C3C7 B 4 C3C8 C 5 C3C9 C 5 C3D0 B 5 C3D1 C 5 C3D2 B 5 C3D3 C 5 C3D4 C 5 C3D5 C 5 C3D6 C 5 C3D7 B 5 C3D8 B 5 C3D9 C 5 C3E0 C 5 C3E1 B 5 C3E2 B 5 C3E3 ...

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