Samsung DX7-A User manual

DX7-A/DX7-AC
DX8-A/DX8-AC
1. Disassembly and Reassembly
2. Alignment and Adjustment
VHS DECK CONTENTS
MECHANICAL
Manual
3File with the SERVICE MANUAL.
© Samsung Electronics Co., Ltd. NOV. 1997 AC68-20392A

Samsung Electronics 1-1
1-1 Deck Parts Locations
1-1-1 Deck (Top View)
123 4 58910
11
12
13
14
15
1617
18
19
76
Fig. 1-1 Deck Top Parts Location (DX7-A/DX8-A DECK ONLY)
1. ARM TENSION FULL ASS’Y
2. BRAKE MAIN “L” ASS’Y
3. GUIDE ROLLER ASS’Y “T”
4. FULL ERASE HEAD
5. GUIDE ROLLER ASS’Y “S”
6. CYLINDER ASS’Y
7. LEVER PINCH COMP ASS’Y
8. LEVER PINCH CAM
9. FULL ACE HEAD AAS’Y
10. UNIT PINCH ROLLER ASS’Y
11. LEVER REVIEW
12. BRAKE SUB “R” ASS’Y
13. REEL DISK “R” ASS’Y
14. GEAR RELAY “T” ASS’Y
15. IDLER ASS’Y
16. GEAR RELAY “S” ASS’Y
17. REEL DISK “L” ASS’Y
18. LEVER JOG ASS’Y
(DX8-A/AC ONLY)
19. LEVER REC SWITCH
1. Disassembly and Reassembly

Disassembly and Reassembly
1-2 Samsung Electronics
1-1-2 Deck (Top View)
12346
578910 11
12
13
14
151617
18
19
20
Fig. 1-2 Deck Top Parts Location (DX7-AC/DX8-AC DECK ONLY)
1. ARM TENSION FULL ASS’Y
2. BRAKE MAIN “L” ASS’Y
3. GUIDE ROLLER ASS’Y “T”
4. FULL ERASE HEAD
5. HEAD CLEANER ASS’Y
(DX7-AC/DX8-AC ONLY)
6. GUIDE ROLLER ASS’Y “S”
7. CYLINDER ASS’Y
8. LEVER PINCH COMP ASS’Y
9. LEVER PINCH CAM
10. FULL ACE HEAD AAS’Y
11. UNIT PINCH ROLLER ASS’Y
12. LEVER REVIEW
13. BRAKE SUB “R” ASS’Y
14. REEL DISK “R” ASS’Y
15. GEAR RELAY “T” ASS’Y
16. IDLER ASS’Y
17. GEAR RELAY “S” ASS’Y
18. REEL DISK “L” ASS’Y
19. LEVER JOG ASS’Y
(DX8-A/AC ONLY)
20. LEVER REC SWITCH

Disassembly and Reassembly
Samsung Electronics 1-3
1-1-3 Deck (Bottom View)
12346
57
8
9
10
11
13 12
Fig. 1-3 Deck Bottom Parts Location
1. LEVER SLIDE PINCH
2. BELT CAPSTAN
3. MOTOR D.D CAPSTAN
4. BRAKE CAPSTAN ASS’Y
5. GEAR LOADING “R” ASS’Y
6. MOTOR CYLINDER
7. GEAR LOADING “L” ASS’Y
8. SLIDE MAIN
9. LEVER REC SWITCH
10. LEVER IDLER CHANGE
11. CLUTCH ASS’Y
12. UNIT LOADING
13. GEAR MASTER

Disassembly and Reassembly
1-4 Samsung Electronics
1-1-4 Housing
12 3
4
65
Fig. 1-4 Housing Parts Location
1. CHASSIS SIDE “L” ASS’Y
2. UPPER CHASSIS
3. CHASSIS SIDE “R” ASS’Y
4. SHAFT ARM ASS’Y
5. HOLDER CASSETTE ASS’Y
6. LEVER DOOR

Disassembly and Reassembly
Samsung Electronics 1-5
1-2 Housing Assembly
1-2-1 Removal from Main Base
1. Remove 3 Screws !.
2. Lift the Housing AssÕy in the direction of arrow ÒBÓ, while pushing the tab @in the direction of arrow ÒAÓ.
(Refer to detail drawing)
3 SCREWS
1
MAIN BASE
TAB
"A"
2
Fig. 1-5 Housing Ass’y Removal from Main Base

Disassembly and Reassembly
1-6 Samsung Electronics
1-2-2 Diassembly
2 SCREWS
UPPER CHASSIS
CHASSIS SIDE "R"
HOLDER
CASSETTE ASS'Y
SHAFT ARM ASS'Y
CHASSIS SIDE "L"
Fig. 1-6 Housing Ass’y Removal

Disassembly and Reassembly
Samsung Electronics 1-7
1-2-3 Upper Chassis Removal
1. Remove 2 Screws !.
2. Lift the Upper Chassis @in the direction of arrow ÒAÓ.
2 SCREWS
UPPER CHASSIS
2
"A"
1
Fig. 1-7 Upper Chassis Removal

Disassembly and Reassembly
1-8 Samsung Electronics
1-2-4 Holder Cassette Ass’y and Chassis Side L/R Removal
1. Lift the Cassette Holder !in the direction of arrow ÒAÓ (Refer to Fig. A).
2. Remove the Side Chassis ÒLÓ @and ÒRÓ #from Arm Shaft AssÕy $in the direction of arrow ÒBÓ, ÒCÓ
(Refer to Fig. B).
HOLDER CASSETTE ASS'Y
"A" 1
2
4SHAFT ARM ASS'Y
CHASSIS SIDE "L"
3CHASSIS SIDE "R"
SLIDE DAMPER
"B" <Fig. A>
<Fig. B>
<DETAIL>
(REASSEMBLY OF CHASSIS
SIDE "R" & SHAFT ARM "R")
(SIDE VIEW)
"C"
"D"
SHAFT ARM "R"
Fig. 1-8 Holder Cassette Ass’y and Chassis Side L/R

Disassembly and Reassembly
Samsung Electronics 1-9
1-2-5 Chassis Side “R” Parts Locations
CHASSIS SIDE "R"
(SIDE VIEW "A")
SLIDE DAMPER
LEVER-LID OPENDER
"A"
SPRING-SLIDE DAMPER
SPRING-LID OPENDER
Fig. 1-9 Chassis Side “R” Parts Locations
Note : If you operate the deck when the Cassette AssÕy Holder is removed, the Arm Shaft ÒRÓ and the Damper
Slide are not returned to their original positions. If this happens by accident, push the Damper Slide of
Side Chassis ÒRÓ in the direction of arrow ÒDÓ, and return the Damper Slide in the reverse direction of
arrow ÒDÓ when the Arm Shaft AssÕy is in eject mode.

Disassembly and Reassembly
1-10 Samsung Electronics
1-2-6 Slide Damper Removal
1. Remove the Slide Damper Spring !.
2. Push the Stopper #of the Side Chassis ÒRÓ $. Move the Damper Slide @in the direction of arrow.
3. Align the Damper Slide @with the chassis side tab (as shown detail drawing).
CHASSIS SIDE "R"
CHASSIS SIDE "R" TAB
SLIDE DAMPER
4
STOPPER
3
SLIDE DAMPER
2
SPRING- SLIDE DAMPER
1
Fig. 1-10 Slide Damper Removal

Disassembly and Reassembly
Samsung Electronics 1-11
1-3 Cylinder Ass’y
1-3-1 Exploded View of Cylinder Ass’y
ASS'Y MOTOR - ROTOR
ASS'Y - SUB CYLINDER
2 SCREWS
3 SCREWS
2 SCREWS
ASS'Y - MOTOR STATOR
ASS'Y - BASE CYLINDER
SPRING
CARBON TIP
Fig. 1-11 Expleded View of Cylinder Ass’y

Disassembly and Reassembly
1-12 Samsung Electronics
1-3-2 Stopper Tape Removal (Only for Deck : DX7-A/DX8-A)
1. Release 1 tab !in the direction of arrow ÒAÓ. (Refer to detail drawing)
2. Lift the Tape Stopper @in the direction of arrow ÒBÓ.
"B"
TAB
<DETAIL>
"A"
1
STOPPER TAPE
2
Fig. 1-12 Stopper Tape Removal
1-3-3 Head Cleaner Ass’y Removal (Only for Deck : DX7-AC/DX8-AC)
1. Release 1 tab !in the direction of arrow ÒAÓ. (Refer to detail drawing)
2. Lift the Head Cleaner @in the direction of arrow ÒBÓ.
ASS'Y HEAD CLEANER
"B"
2
TAB
<DETAIL>
"A"
1
Fig. 1-13 Head Cleaner Ass’y Removal
Note: Stopper tape has deleted from JAN.1998

Disassembly and Reassembly
Samsung Electronics 1-13
1-3-4 Cylinder Ass’y Removal from Main Base
1. Remove 3 Screws !holding the Main Base and the Cylinder AssÕy.
2. Lift the Cylinder AssÕy @in the direction of arrow.
Note : Do not touch the video heads during removal or installation.
3 SCREWS
1
CYLINDER ASS'Y
2
Fig. 1-14 Cylinder Ass’y Removal from Main Base

Disassembly and Reassembly
1-14 Samsung Electronics
1-3-5 Holder FPC Removal
1. Release the Holder FPC tab holding the Cylinder Base @in the direction of arrow. (Refer to detail drawing)
2. Disconnect the Holder FPC !from the Cylinder Base @.
Note : When disconnecting the FPC Holder !from the Cylinder Base @:
Take care not to disconnect the FPC cable from the FPC Holder (The FPC cable is very short).
HOLDER FPC
CYLINDER BASE
CYLINDER BASE
HOLDER FPC
<DETAIL : BOTTOM VIEW>
2
1
Fig. 1-15 Head Brush and Holder FPC Removal

Disassembly and Reassembly
Samsung Electronics 1-15
1-3-6 Cylinder Ass’y Removal from Cylinder Base
1. Remove 3 Screws !from the Cylinder Base @.
2. Lift the Cylinder AssÕy #from the Cylinder Base @in the direction of arrow.
CYLINDER SUB ASS'Y
CYLINDER BASE
3 SCREWS
2
1
3
Fig. 1-16 Cylinder Ass’y Removal from Cylinder Base

Disassembly and Reassembly
1-16 Samsung Electronics
1-3-7 Motor Stator Removal
1. Remove 2 Screws !.
2. Remove the Motor Stator @from the Cylinder Sub AssÕy %.
MOTOR - STATOR
CYLINDER SUB ASS'Y
2
2SCREWS
1
5
SPRING
CARBON TIP
3
4
Fig. 1-17 Motor Stator Removal
Note : When disassembling the Motor-Stator, take extreme care not to loose the carbon-tip and
spring.

Disassembly and Reassembly
Samsung Electronics 1-17
1-3-8 Motor Rotor Removal
1. Remove 2 Screws !.
2. Lift The Motor Rotor@.
MOTOR - ROTOR
DRUM SUB ASS'Y
2
3
2 SCREWS
1
Fig. 1-18 Motor Rotor Removal

Disassembly and Reassembly
1-18 Samsung Electronics
1-3-9 Motor Rotor and Cylinder Sub Ass’y
1. Make sure that phase matching holes of the Motor Rotor and the Cylinder Sub AssÕy are aligned correctly as
shown in Fig. 1-19 (Refer to phase matching hole).
2. Secure with 2 Screws.
MOTOR - ROTOR
PHASE MATCHING HOLE
DRUM SUB ASS'Y
2
3
2 SCREWS
1
Fig. 1-19 Assembly of Motor Rotor and Cylinder Sub Ass’y

Disassembly and Reassembly
Samsung Electronics 1-19
1-3-10 Motor Stator and Cylinder Sub Ass’y
1. Reinstall the Motor Stator !toward the FPC cable of Cylinder Sub AssÕy @.
2. Secure 2 Screws. (Refer to Fig. 1-17)
MOTOR - STATOR
CYLINDER SUB ASS'Y
1
2
Fig. 1-20 Assembly of Motor Stator and Cylinder Sub Ass’y