Mitsubishi Electric HS-U449 Service Manual page 2

- FILE "COVERPGE" -
SPECIFICATIONS ...........................................................1
CONTENTS......................................................................2
GLOSSARY OF ABBREVIATIONS.................................4
- FILE "DISASSY" -
SAFETY PRECAUTIONS ................................................1
CONNECTION .................................................................3
DISASSEMBLY................................................................4
HOW TO EXECUTE CIRCUIT BOARD SERVICE...........7
CHIP PARTS REPLACEMENT........................................9
- FILE "ELCTADJ" -
HOW TO INITIALIZE THE E
WHEN REPLACING IC5A0 .............................................1
ELECTRICAL ADJUSTMENTS.......................................1
Servo circuit..................................................................2
- FILE "MECHAADJ" -
MECHANICAL ADJUSTMENT
AND REPLACEMENT...............................1
1. DECK Cleaning...................................................1
1-1 VIDEO HEAD .................................................1
1-2 Tape Running System ....................................1
1-3 REEL DISK Drive System ..............................1
2. Replacement of Major Parts ..............................2
2-1 CLEANING ARM ...........................................2
2-2 STAY PLATE ..................................................2
2-3 BOTTOM ASSY.............................................3
2-4 INSERT GUIDE (TU) .....................................4
2-5 INSERT GUIDE (SP) .....................................4
2-6 REC HOLDER, REC LEVER,
REC SPRING ................................................5
2-7 F/L ARM ASSY, F/L BEARING......................5
2-8 A/C HEAD UNIT ............................................6
2-9 F/E HEAD UNIT.............................................6
2-10 SENSOR COVER (TU)..................................7
2-11 SENSOR COVER (SP)..................................7
2-12 REV UNIT (TU),
REV UNIT (SP)..............................................8
2-13 MODE POSITION UNIT ................................8
2-14 REEL BELT, PULLEY BUSH,
THRUST WASHER,
BELT PULLEY, SHIFT SLIDER,
PULLEY GEAR ASSY, SLIP GEAR,
SLIP SPRING, SLIP WASHER,
THRUST WASHER, SLIP ADJUSTER,
CONTENTS
2 PROM................................1
IDLER 2 UNIT................................................9
2-15. CAPSTAN BRAKE 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 AXIS HOLDER,
REEL DISK (SP side) ..................................18
2-26 BRAKE BELT (TU).......................................19
2-27 BRAKE (TU), REEL DISK (TU side)............19
2-28 SHIFT LEVER .............................................20
2-29 CHARGE SPRING, SWING LEVER,
CHARGE ASSY...........................................21
2-30 LOADING ARM ASSY (SP),
LOADING ARM ASSY (TU).........................21
2-31 A/L LEVER ..................................................22
2-32 TAPE GUIDE ASSY (SP),
TAPE GUIDE ASSY (TU) ............................24
2-33 DRUM CLAMPER, DRUM ASSY ................25
2-34 DRUM MOTOR STATOR, BRUSH SPRING,
SPACER, ROTOR CASE, END RING,
BRUSH, UPPER DRUM ASSY ...................26
2-35 CAPSTAN MOTOR ......................................27
3. Interchangeability Adjustment
of the Mechanism.............................................29
3-1 Adjustment of BACK TENSION and
TENSION POLE's Position..........................29
3-2 Check and Adjustment of
the FM Envelope..........................................30
3-2-1 GUIDE ROLLER Adjustment Check............30
3-2-2 Height Adjustment of
GUIDE ROLLER (SP)..................................30
3-2-3 Height Adjustment of
GUIDE ROLLER (TU)..................................30
3-2-4 Coarse Adjustment of Phase.......................31
3-2-5 Flatness Check of FM Waveform.................31
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