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AIWA_HV-GX810Z_VCR_sm


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SECTION 4 MECHANISM
                                                     CONTENTS
 FRONT LOADING MECHANISM                                            31. Gear Pinch.............................................4-13
 DISASSEMBLY                                                        32. T/Up Arm Assembly...............................4-13
                                                                    33. Gear Pinch Cam ....................................4-14
     Front Loading Mechanism Assembly
     Parts Location .....................................4-1         MECHANISM ADJUSTMENT
1.   Front Loading Mechanism Disassembly..4-2
2.   Guide Cassette........................................4-2          Tools and Fixtures for Deck ...................4-15
3.   Bracket Assembly Side(R).......................4-2             1. Mechanism and Mode Switch Alignment
4.   Bracket Assembly Side(L)/Top Plate .......4-2                      Check ....................................................4-16
5.   Holder Assembly Cassette ......................4-2             2. Preparation for adjustment
6.   Arm Assembly F/L ...................................4-3            (To set VCR(VCP) to the Loading
7.   Spring Stopper.........................................4-3         State without inserting a cassette).........4-17
8.   Plate Reflector .........................................4-3   3. Tension post position and Tension
                                                                        Adjustment.............................................4-17
 DECK MECHANISM DISASSEMBLY                                         4. Checking Torque....................................4-18
                                                                    5. Guide Roller Height Adjustment ............4-19
     Deck mechanism Parts Location ....4-4                          6. Audio/Control (A/C) Head Adjustment...4-20
1.  Auto Head Cleaner Assembly .................4-5                 7. X-Value Adjustment ...............................4-21
2.  Drum and Base Assembly ........................4-5              8. Adjustment after Replacing Drum
3.  Drum Sub Assembly................................4-5                Assembly (Video Heads) .......................4-22
4.  A/C (Audio/Control) Head Assembly .......4-6                    9. Check The Tape Travel after Reassembling
5.  FE (Full Erase) Head Assembly ..............4-6                     Deck Assembly................................................4-22
6.  Plate Up/Supply Main Brake/Take up                                  9-1. Check Audio and RF Locking Time ...............
    Main Brake/Body prism Led Assembly....4-7                                during Playback after CUE or REV ........4-22
7. Tension Arm/Lever Assembly Tension.....4-7                           9-2. Check the condition between the Audio
8. TAB Lever ................................................4-7             and Video Sync. (Lip Sync).....................4-23
9. Supply Reel/Take up Reel Assembly.......4-8                          9-3. Check for tape curling or jamming..........4-23
10. Gear Pulley/Belt Capstan ........................4-8            10. Maintenance/Inspection Procedure................4-24
11. Gear H1, H2/Lever H1.............................4-8
12. Arm Assembly Idler .................................4-8          MECHANISM TROUBLESHOOTING
13. Mode S/W................................................4-9      GUIDE
14. Capstan Motor Assembly ........................4-9
15. Cam Bracket Assembly ...........................4-9             1. Deck Mechanism ...................................4-27
16. Cam Bracket/Lever Jog/Gear Jog ...........4-9                   2. Front Loading Mechanism .....................4-31
17. Gear Cam L/D .......................................4-10         EXPLODED VIEWS
18. Gear P/S Plate Slider ............................4-10
19. Gear Assembly P2/P3 ...........................4-10             1. Moving Mechanism Section (1) .............4-34
20. Base Assembly P2/P3 ...........................4-10             2. Moving Mechanism Section (2) .............4-35
21. Guide Roller Assembly ..........................4-11            3. Front Loading Mechanism Section ........4-36
22. Clutch Assembly S27.............................4-11
23. Clutch Assembly T27 .............................4-11
24. Lever F/R & Arm F/R .............................4-11
25. Holder Pinch Assembly .........................4-12
26. Pinch Arm Assembly .............................4-12
27. L/D Motor Bracket Assembly .................4-12
28. Worm Wheel ..........................................4-12
29. L/D Motor Assembly & Worm
    L/D Motor & L/D Motor Bracket .............4-13
30. Gear CNT ..............................................4-13
FRONT LOADING MECHANISM DISASSEMBLY
    Front Loading Mechanism Assembly, Parts Location




          5. Arm Assembly F/L
                           9. Plate Ground (L)
                                  6. Plate Reflector
                                                                    3. Top Plate

                                                                       8. Plate Ground (R)




                                                                                   6. Plate
                                                                                      Reflector

                                       4. Holder                       2. Bracket Assembly
                                          Assembly                        Side(R)
                                          Cassette



                     1. Guide Cassette                    7. Opener Door




*  Component list below will be discribed as       3.   Top Plate
   if the top and bottom covers, front panel       4.   Holder Assembly Cassette
   and deck mechanism assembly have                5.   Arm Assembly F/L
   already been removed.                           6.   Plate Reflector
1. Guide Cassette                                  7.   Opener Door
2. Bracket Assembly Side (R)                       8.   Plate Ground(R)
                                                   9.   Plate Ground(L)




LG                                                                                           4-1
FRONT LOADING MECHANISM DISASSEMBLY
1. Front Loading Mechanism Assembly                         3. Bracket Assembly Side (R) (Fig. A-3)
   (Fig. A-1)                                               1) Push the tabs(L), (R) of Bracket Assembly Side(R) to
1) Remove the Top and Bottom Covers and Front Panel.           disengage with the Top Plate and remove it in the
2) Remove two screws(A).                                       direction of arrow(A).
3) Lift up the Front Loading Mechanism Assembly in the
   direction of arrow(B).

                                                                              Top Plate
      NOTE                                                                                            Plate Ground
When disassembling and reassembling:                                                                        (A)
1) Give special attention to removal and to reassembly
   because two tabs(L), (R) are engaged.
                                                                                             (A)
                                                                                                                     (R)


                               (A)
                                                                                                       Bracket Assembly
                                 (B)                                                            (L)    Side(R)



                                                                              Fig. A-3 Bracket Assembly Side(R)




                                                            4. Bracket Side(L)/Top Plate (Fig. A-4)
          (L)                                               1) Remove the screw(B).
                                                            2) Remove the plate Ground(L), in the direction of
                         (R)                                   arrow(A).
                                                            3) Push the locking tab(L1) and then remove the Bracket
             Fig. A-1 Front Loading Mechanism
                                                               Side(L) in the direction of arrow(B).
                                                            4) The Top Plate can be removed by Separating the
                                                               Bracket Side(L).

2. Guide Cassette (Fig. A-2)
1) Push tab(R) of the Cassette Guide and disengage with
   Bracket Side(R) and push tab(L) of the cassette Guide                      Plate Ground(L)
   which is engaged with Bracket Side(L) and remove it in         (B)
   the direction of arrow (B).                                                     Hook(L)
                                                            (A)                    (B)                 Top Plate



                   (L)                                                  (C)
                                                                                  (L1)
                                                            Brackdt Side(L)



                   (B)

                                     (B)
      Cassette Guide
                                                                              Fig. A-4 Bracket Side(L)/Top Plate



                                            (R)

                 Fig. A-2 Guide Cassette




4-2                                                                                                                        LG
FRONT LOADING MECHANISM DISASSEMBLY
5. Holder Assembly Cassette (Fig. A-5)                      7. Spring Stopper (Fig. A-7)
1) Separate the Bracket Assembly Side(R).                   1) Remove the Spring Stopper which is connected to the
2) Push the two lever tabs(L), (R) down and separate the       tabs(A), (B) of the Lever Stopper(R) and the Bracket
   Holder Assembly Cassette and the Arm Assembly F/L           Holder(R).
   from the Top Plate.

                                                                                  Lever Stopper(R)
                                                                                                     Spring Stopper




                                                                                            (A)


                                                                                                      (B)




             Holder                                                                       Bracket Holder(R)
             Assembly Cassette
                                                                              Fig. A-7 Spring Stopper
           Fig. A-5 Holder Assembly Cassette

                                                            8. Plate Reflector (Fig. A-8)
                                                            1) Detach the Plate Reflector(L) from the Bracket Side(L)
6. Arm Assembly F/L (Fig. A-6)                                 by using a knife.
1) Remove by pulling the Arm F/L(R) from the Bracket        2) Detach the Plate Reflector(R) from the Bracket
   Holder(R) Boss in the direction of arrow(A).                Assembly Side(R) by using a knife.
2) Separate the Arm Assembly F/L from Cassette Holder
   Boss in the direction of arrow(B).

   NOTE
When disassembling and reassembling:
                                                                                                            Bracket
1) Be sure to remove the Arm F/L(R) first. If not the Arm   Bracket Side(L)                                 Assembly Side(R)
   Assembly F/L can be damaged.
                                                                                Plate Reflector
                                                                                (L), (R)


     (B)




                                                                              Fig. A-8 Plate Reflector

                                                  (A)
  Arm Assembly F/L




              Fig. A-6 Arm Assembly F/L




LG                                                                                                                       4-3
DECK MECHANISM DISASSEMBLY
  Deck Mechanism Parts Location


 TOP VIEW
                                   A/C Head Assembly
      Auto Head Cleaner Assembly

                                    Bracket Assembly
      Drum Brush                    L/D Motor


      FE Head                         Holder
      Drum Assembly                   Assembly Pinch
                                    Arm Assembly T/up
      Base Assembly
      P2/P3                           Gear Pinch Cam


      Tension Arm                      Plate Up
      Assembly
      Supply Reel                     Take-up Reel
      Assembly (S27)                  Assembly (T27)

      TAB Lever




 BOTTOM VIEW




      Capstan Motor
      Assembly




      Mode Switch
      Slider Plate
                                      Bracket Cam
      Gear Pulley
      H1 Lever                        Clutch Assembly
                                      S27
      Gear H2/H1                      Arm Assembly
      Clutch Assembly                 Idler
      T27




4-4                                                 LG
DECK MECHANISM DISASSEMBLY
1. Auto Head Cleaner Assembly (Fig. B-1)
   (Optional Item)
1) Push the tab(A) of Auto Head Cleaner and remove the           Drum
   Cleaner Arm Assembly.                                         Assembly                         (A)                  Drum
                                                                                                                       Brush
     NOTES:
When disassembling and reassembling:
1) Do not allow fingers or tools to touch the outside of the                                                 (A)
   Drum.
2) Be careful not to get any foreign substance on the                 Drum              7(A)
   Roller.                                                            Base




                                                                                               (B)

     Cleaner Arm Assembly

                                              (A)




                                                                          Fig. B-2 Drum and Base Assembly



                                                               3. Drum Sub Assembly and Motor
                                                                  Assembly (Fig. B-3-1)
                                                               1) Remove the Drum Base from the Deck Mechanism
                                                                  Assembly.
        Fig. B-1 Auto head cleaner Assembly
                                                               2) Separate the Drum Assembly from the Drum Base.
                                                               3) Remove two screws(A) and then remove the rotor.
                                                               4) Remove three screws(B) and then remove the stator.

2. Drum and Base Assembly (Fig. B-2)                              NOTE
1) Remove the Auto Head Cleaner Assembly. (option)             When disassembling and reassembling:
2) Remove three screws(A) and separate the Drum                1) Do not touch the video tips with fingers or tools.
   Assembly, Drum Base and the Drum Brush from the
   Deck Mechanism Assembly.
3) Remove three screws(B) on the back side and remove
   the Drum Assembly from the Drum Base.
                                                                   Drum
     NOTES:                                                        Sub Assembly
When disassembling and reassembling:
1) Do not touch the video tips with fingers or tools.
   Give special attention to disassembling and
                                                                                                                   stator
   reassembling of Auto Head Cleaner Assembly.
2) After assembling, adjust the tape transport system and          Motor
                                                                   Assembly
   Servo PG.


                                                                                        (B)                        rotor


                                                                                                (A)

                                                                     Fig. B-3-1 Drum Sub and Motor Assembly




LG                                                                                                                          4-5
DECK MECHANISM DISASSEMBLY
4. A/C (Audio/Control) Head Assembly                       5. FE (Full Erase) Head Assembly (Fig. B-5)
   (Fig. B-4)                                                 (Optional Item)
                                                           1) Push two tabs(A) and remove the FE Head.
1) Unplug the A/C connector from the Loading Motor
   P.C.B.                                                    NOTE
2) Remove two screws(A) and remove the A/C Head
   Assembly from the Deck Mechanism Assembly.              When disassembling and reassembling:
                                                           1) Be careful not to get any foreign substance on the FE
  NOTES:                                                      Head.

When disassembling and reassembling:
1) When assembling, the 3mm hole of the Base A/C
   should coincide to 3mm hole in the Chassis.
2) Do not touch the A/C Head Tips with fingers or tools.
3) After reinstalling the Audio Control Head Assembly,
   adjust the Tilt, Azimuth and Height of A/C Head.

                              (A)


                                                                                                           (A)




                                                                        Fig. B-5 FE Head Assembly




              Fig. B-4 A/C Head Assembly




4-6                                                                                                              LG
DECK MECHANISM DISASSEMBLY
6. Plate Up/Supply Main Brake/Take up Main                    NOTES:
   Brake/Body Prism Led Assembly (Fig. B-6)                 When disassembling and reassembling:
1) Plate Up                                                 1) (D) is engaged to the cam groove of the Gear Cam L/D
   



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