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8mm Video MECHANICAL ADJUSTMENT MANUAL IX
MECHANISM DECK
M2000 MECHANISM
Please use this manual with the service manual of the respective models.
Ver 1.0 2000. 12


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TABLE OF CONTENTS
1.
Preparations for Check, Adjustment and
Replacement of Mechanism Block
1-1.
Service Jigs and Tools ························································ 3
1-2.
Mode Selector II Operating Procedure ······························· 5
2.
Periodic Inspection and Maintenance
2-1.
Rotary Drum Cleaning ······················································· 9
2-2.
Tape Path System Cleaning ················································ 9
2-3.
Periodic Inspection List ···················································· 10
2-4.
Appling Oil and Grease ···················································· 10
3.
Before Replacement, Check or Adjustment
3-1.
Phase Adjustment ····························································· 11
3-2.
Cassette compartment assembly ······································· 12
4.
Check, Adjustment and Replacement
4-1.
Drum Assembly ································································ 14
4-2.
HCL Arm Assembly, Loading Motor Assembly ·············· 15
4-3.
Drum Base Assembly, Drum Earth ·································· 16
4-4.
Guide Rail T2, Capstan Motor ········································· 17
4-5.
Blind Plate, Lock Guide ··················································· 18
4-6.
Reel Table (T) Assembly, T Soft Assembly ····················· 19
4-7.
S Ratchet RE Plate, Cassette Guide S ······························ 20
4-8.
R Drive Gear Assembly, LS Cam Plate ···························· 21
4-9.
LS Cam Plate Position Adjustment ·································· 22
4-10. LS Chassis Block Assembly ············································· 23
4-11. TG7 Arm Block Assembly, Pinch Arm Assembly ··········· 24
4-12. Guide Base (T) Block Assembly,
Guide Base (S) Block Assembly ······································ 25
4-13. TG1 Arm, Reel Table (S) Assembly, Push Switch (3Key) · 26
4-14. Hall Element (H001, H002 (T/S Reel)),
Photo Transistor (Q001, Q002 (Tape Top/Tape End)),
LED (D001 (Tape LED)) ·················································· 27
4-15. LS Guide Roller, Guide Lock Plate (T),
Pinch Pusher Assembly, Eject Arm ···································· 28
4-16. Rotary Switch, Cam Relay Gear,
Change Gear Assembly, Timing Belt ······························· 29
4-17. Guide Gear Assembly, Guide Gear T Assembly,
Cam Relay Gear 1, Guide Lock Plate (S) ························ 30
4-18. LD Gear 4, Cam Gear 1, HC Drive Arm ·························· 31
4-19. M Slide Plate Assembly, LS Arm Assembly,
Cam Gear 2, GL Arm Assembly ······································ 32
5.
Adjustment
5-1.
Check and Adjustment of TG1 Back-tension Position ····· 33
5-2.
Check and Adjustment of FWD/RVS Back-tension ········· 34
5-3.
Capstan Motor Azimuth Position Adjustment ·················· 35
5-4.
Tape Path Adjustment ······················································· 36
6.
Exploded Views
6-1.
Cassette Compartment Assy, Drum Assy ························· 40
6-2.
LS Chassis Block Assembly ············································· 41
6-3.
Mechanical Chassis Block Assembly-1 ··························· 42
6-4.
Mechanical Chassis Block Assembly-2 ··························· 43
7.
Printed Wiring Boards and
Schematic Diagrams .............................................. 44


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1. Preparations for Check, Adjustment and Replacement of Mechanism Block
Before Replacement, Check or Adjustment
· Refer to the "DISASSEMBLY" section of the SERVICE MANUAL of the respective models for details of removing cabinets and printed
wiring boards.
· When checking a mechanism ir making any adjustment to the mechanism or replacing mechanical parts, be sure to use the Mode Selector
II and select the appropriate status of the mechanical deck such that the mechanical status is suitable for the desired work. Refer to section
"1-2. Mode Selector II Operating Procedure" for details on how to enter the mode shown in a rectangle [
] mode in the sequent sections
of this manual.
* Assemble and adjust the parts in the [USE] mode if any mode is not specified in this manual.
1-1. Service Jigs and Tools
Ref. No.
J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
J-10
J-11
J-12
J-13
J-14
J-15
J-16
Name
Cleaning fluid
Wiping cloth
Super-fine applicator
(made by Nippon Applicator (P752D))
Head eraser
Mirror (small oval type)
Alignment tape
NTSC : WR5-1NP
PAL : WR5-1CP
FWD/RVS take-up torque cassette
Tape path screwdriver
Adjustment remote commander (RM-95 upgrated)
MD process table
Floil grease
Torque screwdriver
Mode Selector II
Mode Selector II conversion board
Mode Selector II ROM, Ver 1.6
Thickness gauge
Part code
Y-2031-001-0
7-741-900-53
commercially available
J-6080-840-A
8-967-995-02
8-967-995-07
J-6080-824-A
J-6082-026-A
J-6082-053-B
J-6082-166-A
7-662-001-39
J-9049-330-A
J-6082-282-B
J-6082-516-A
J-6082-314-E
9-911-053-00
Jig inscription
GD-2038
GD-2086
Used for
Tape path
Tape path
For tracking adjustment
For tape guide adjustment
Tape path (for setting the path mode)(Note)
For capstan azimuth adjustment,
LS cam plate position adjustment
Other required equipment:
· Oscilloscope
· Analog tester (20 k
)
Note: If the micro processor IC in the adjustment remote commander is
not the new micro processor (UPD7503G-C56-12), the pages cannot
be switched. In this case, replace with the new micro processor (8-
759-148-35).


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J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
J-10
J-11
J-12
J-13
J-14
J-15
J-16
Fig. 1-1.


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1-2. Mode Selector II Operating Procedure
1-2-1. Introduction
The Mode Selector II is a mechanism drive tool that assists
maintenance work of the various mechanism decks. It has the
following functions.
1. Manual Test
In this mode, the motor of the mechanism deck is powered only
during the period while the switch is turned on manually. Using the
Manual Test, the operator can freely control the motor of the
mechanism deck.
2. Step Test
In this mode, the motor of the mechanism deck is kept turned on
until the mechanical status is changed from the present mechanical
status that is obtained from the sensor information. The Step Test is
used to confirm a series of movements of the mechanism deck.
3. Auto Test
The Mode Selector II stores the status transition table in its memory
as data indicating the respective modes of the mechanism deck.
The status transition table can be used to confirm whether a
mechanism deck is operating normally or has abnormality from a
series of movements of a mechanism deck. If an abnormal status
transition is detected during operation, the "NG" indication appears
and the mechanism stops moving.
Mode Selector II (J-6082-282-B) connection diagram
Fig. 1-2.
RVS
FF
SEL
Mode Selector II
(Ref. No. J-13)
Selector button
LCD display screen
External battery is
connected here as
a power supply
Relay board
(already connected)
Alligator clip
Fig. 1-3.
Alligator clip
(not used in M2000 mechanism)
M2000 mechanism
Mode selector l l
Mode selector l l
conversion board (M)
(Ref. No. J-14)
Connector (black) 6-pin
(not used in M2000 mechanism)
Connector (white) 6-pin
Battery such as NP-55, NP-77
(power supply)
Relay board