Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo MECHA FM-MECHA FM-M(PAL)

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Technical Service Guide
         VCR MECHANISM UNIT
                 (FM-MECHA)
CONTENTS
1. DESCRIPTION OF THE MECHANISM
 1. CHARACTERSTIC OF THE FM-DECK MECHANISM........................................................................................................2
 2. DESCRIPTION OF THE MODE ............................................................................................................................................3
 3. FM DECK TIMING CHART.................................................................................................................................................12
 4. WIRING DIAGRAM .............................................................................................................................................................13


2. ARRANGEMENT AND CHECK FOR THE MAJOR PARTS
 1. PARTS LOCATION .............................................................................................................................................................15
 2. PERIODIC MAINTENANCE AND SERVICE SCHEDULE .................................................................................................18
 3. JIGS AND TOOLS...............................................................................................................................................................20


3. DISASSEMBLY AND EXCHANGE
 1. MECHANICAL CHECKS ....................................................................................................................................................22
 2. REPLACEMENT OF THE DRUM TOTAL ASS'Y...............................................................................................................23
 3. REPLACEMENT OF THE S, T SLANT POLE ASS'Y.........................................................................................................24
 4. REPLACEMENT OF THE PINCH LEVER TOTAL ASS'Y..................................................................................................25
 5. REPLACEMENT OF THE A/C HEAD TOTAL ASS'Y.........................................................................................................25
 6. REPLACEMENT OF THE L/C BRKT ASS'Y......................................................................................................................26
 7. REPLACEMENT OF THE MAIN PLATE.............................................................................................................................27
 8. REPLACEMENT OF THE CAM GEAR, RELAY PLATE, F/L RACK..................................................................................28
 9. REPLACEMENT OF THE TENSION LEVER ASS'Y ..........................................................................................................29
 10. REPLACEMENT OF THE CAPSTAN MOTOR ................................................................................................................30


4. MECHANICAL ADJUSTMENT
 1. CHECK FOR THE MECHANICAL POSITION....................................................................................................................31
 2. HOW TO SET MECHANICAL MODE.................................................................................................................................34
 3. MEASUREMENT OF PRESSING FORCE FOR PINCH ROLLER ....................................................................................34
 4. ADJUSTMENT OF TENSION POLE POSITION................................................................................................................35
 5. MEASUREMENT OF THE BACK TENTION ......................................................................................................................35


5. THE ADJUSTMENT OF THE TAPE TRANSPORTING SYSTEM
 1. THE SCHEMATIC DIAGRAM OF TAPE TRANSPORTING SYSTEM ..............................................................................36
 2. ADJUSTMENT FLOW.........................................................................................................................................................37
 3. ADJUSTMENT PROCEDURES..........................................................................................................................................38


6. EXPLODED VIEW & PARTS LIST
 1. EXPLODED VIEW OF DECK ASS'Y ..................................................................................................................................45
 2. PARTS LIST OF DECK ASS'Y ...........................................................................................................................................46
 3. EXPLODED VIEW OF F/L ASS'Y .......................................................................................................................................48
 4. PARTS LIST OF F/L ASS'Y ................................................................................................................................................49
 5. MAIN SPARE PARTS LIST OF DECK ASS'Y....................................................................................................................50
 SERVICE NOTICE ...................................................................................................................................................................52




                                                                                       1
1. DESCRIPTION OF THE MECHANISM
 1. CHARACTERISTIC OF THE FM-DECK MECHANISM
1) FM-MECHA DECK follows the VHS standard and PAL standard.
2) FM-MECHA DECK has 3 motors (DRUM MOTOR, CAPSTAN MOTOR and L/C MOTOR).
3) FM-MECHA DECK uses L/C MOTOR to drive FRONT LOADING.
4) FM-MECHA DECK has 7 MODES (EJECT/INITIAL/IDLE/REV/SLOW/PLAY/FF & REW) and each mode is composed of
   4 bit mode Signals and realized by the mode switch which is driven by the L/C MOTOR.
5) FM-MECHA uses the FULL LOADING system in which mode shifting time (especially, picture appearing time) is short.
6) FM-MECHA DECK is removed the DECK PCB and connected to MAIN PCB by using the B to B TYPE CONNECTOR.




                                                        2
 2. DESCRIPTION OF THE MODE
1) EJECT MODE

A. In this mode, the cassette In/Out operation is performed by the CW/CCW rotation of the L/C motor to which the Front
   Loading driving parts are directly related.
  

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