SAMSUNG TB531VCT1X Service Manual

Television Video Cassette Recorder

Chassis : SCV11F
Model: TB531VCT1X/XSA

TB331VDZ1S/XSA

Television Video Cassette Recorder CONTENTS

Precautions
Specifications
Disassembly and Reassembly

Alignment and Adjustment (Mechanical)

Alignment and Adjustment (Electrical)

Troubleshooting
Exploded View and Parts List
Electric Parts List
Block Diagram
PCB Layout
Wiring Diagram
Schematic Diagrams

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

ELECTRONICS

©

Samsung Electronics Co., Ltd. NOV.1998

Printed in Korea

3SCV11F-3115

1. Precautions

1-1 Safety Precautions

1. Be sure that all of the built-in protective
devices are replaced. Restore any missing
protective shields.

2. When reinstalling the chassis and its
assemblies, be sure to restore all protective
devices, including: nonmetallic control knobs
and compartment covers.

3. Make sure that there are no cabinet openings
through which peopleÑparticularly
childrenÑmight insert fingers and contact
dangerous voltages. Such openings include
the spacing between the picture tube and the
cabinet mask, excessively wide cabinet

ventilation slots, and improperly fitted back

covers.

If the measured resistance is less than 1.0
megohm or greater than 5.2 megohms, an
abnormality exists that must be corrected
before the unit is returned to the customer.

4. Leakage Current Hot Check (Figure 1-1):
Warning: Do not use an isolation
transformer during this test. Use a leakage­current tester or a metering system that
complies with American National Standards
Institute (ANIS C101.1, Leakage Current for
Appliances), and Underwriters Laboratories
(UL Publication UL1410, 59.7).

5. With the unit completely reassembled, plug
the AC line cord directly into the power
outlet. With the unitÕs AC switch first in the
ON position and then OFF, measure the
current between a known earth ground (metal
water pipe, conduit, etc.) and all exposed
metal parts, including: antennas, handle
brackets, metal cabinets, screwheads and
control shafts. The current measured should
not exceed 0.5 milliamp. Reverse the power­plug prongs in the AC outlet and repeat the
test.

Fig. 1-1 AC Leakage Test

6. Antenna Cold Check:
With the unitÕs AC plug disconnected from the
AC source, connect an electrical jumper across
the two AC prongs. Connect one lead of the
ohmmeter to an AC prong. Connect the other
lead to the coaxial connector.

7. X-ray Limits:
The picture tube is especially designed to pro­hibit X-ray emissions. To ensure continued
X-ray protection, replace the picture tube only
with one that is the same type as the original.
Carefully reinstall the picture tube shields and
mounting hardware; these also provide X-ray
protection.

8. High Voltage Limits:
High voltage must be measured each time ser­vicing is done on the B+, horizontal deflection
or high voltage circuits. Correct operation of
the X-ray protection circuits must be
reconfirmed whenever they are serviced.

(X-ray protection circuits also may be called

Òhorizontal disableÓ or Òhold-downÓ.)

Heed the high voltage limits. These include
the XÐray Protection Specifications Label, and
the Product Safety and X-ray Warning Note on
the service data schematic.

Precautions

Samsung Electronics 1-1

LEAKAGE
CURRENT

TESTER

DEVICE
UNDER

TEST

TEST ALL

EXPOSED METAL

SURFACES

2-WIRE CORD

ALSO TEST WITH

PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED)

EARTH

GROUND

(READING SHOULD

NOT BE ABOVE

0.5mA)

Follow these safety, servicing and ESD precautions to prevent damage and protect against potential
hazards such as electrical shock and X-rays.

1-1 Safety Precautions (Continued)

9. High voltage is maintained within specified
limits by close-tolerance, safety-related
components and adjustments. If the high
voltage exceeds the specified limits, check
each of the special components.

10. Design Alteration Warning:
Never alter or add to the mechanical or
electrical design of this unit. Example: Do not
add auxiliary audio or video connectors. Such
alterations might create a safety hazard. Also,
any design changes or additions will void the
manufacturerÕs warranty.

11. Hot Chassis Warning:
Some TV receiver chassis are electrically
connected directly to one conductor of the AC
power cord. If an isolation transformer is not
used, these units may be safely serviced only
if the AC power plug is inserted so that the
chassis is connected to the ground side of the
AC source.

To confirm that the AC power plug is inserted
correctly, do the following: Using an AC
voltmeter, measure the voltage between the
chassis and a known earth ground. If the
reading is greater than 1.0V, remove the AC
power plug, reverse its polarity and reinsert.
Re-measure the voltage between the chassis
and ground.

12. Some TV chassis are designed to operate with
85 volts AC between chassis and ground,
regardless of the AC plug polarity. These units
can be safely serviced only if an isolation
transformer inserted between the receiver and
the power source.

13. Some TV chassis have a secondary ground
system in addition to the main chassis ground.
This secondary ground system is not
isolated from the AC power line. The two
ground systems are electrically separated by
insulating material that must not be defeated
or altered.

14. Components, parts and wiring that appear to
have overheated or that are otherwise
damaged should be replaced with parts that
meet the original specifications. Always
determine the cause of damage or overheat­ing, and correct any potential hazards.

15. Observe the original lead dress, especially
near the following areas: Antenna wiring,
sharp edges, and especially the AC and high
voltage power supplies. Always inspect for
pinched, out-of-place, or frayed wiring. Do
not change the spacing between components
and the printed circuit board. Check the AC
power cord for damage. Make sure that leads
and components do not touch thermally hot
parts.

16. Picture Tube Implosion Warning:
The picture tube in this receiver employs
Òintegral implosionÓ protection. To ensure
continued implosion protection, make sure
that the replacement picture tube is the same
as the original.

17. Do not remove, install or handle the picture
tube without first putting on shatterproof
goggles equipped with side shields. Never
handle the picture tube by its neck. Some
Òin-lineÓ picture tubes are equipped with a
permanently attached deflection yoke; do not
try to remove such Òpermanently attachedÓ
yokes from the picture tube.

18. Product Safety Notice:
Some electrical and mechanical parts have
special safety-related characteristics which
might not be obvious from visual inspection.
These safety features and the protection they
give might be lost if the replacement compo­nent differs from the originalÑeven if the
replacement is rated for higher voltage,
wattage, etc.

Components that are critical for safety are
indicated in the circuit diagram by shading,
( ) or ( ).

Use replacement components that have the
same ratings, especially for flame resistance
and dielectric strength specifications.
A replacement part that does not have the
same safety characteristics as the original
might create shock, fire or other hazards.

Precautions

1-2 Samsung Electronics

!

1-2 Servicing Precautions

1. Servicing precautions are printed on the
cabinet. Follow them.

2. Always unplug the unitÕs AC power cord from
the AC power source before attempting to: (a)
Remove or reinstall any component or
assembly, (b) Disconnect an electrical plug or
connector, (c) Connect a test component in
parallel with an electrolytic capacitor.

3. Some components are raised above the printed
circuit board for safety. An insulation tube or
tape is sometimes used. The internal wiring is
sometimes clamped to prevent contact with
thermally hot components. Reinstall all such
elements to their original position.

4. After servicing, always check that the screws,
components and wiring have been correctly
reinstalled. Make sure that the portion around
the serviced part has not been damaged.

5. Check the insulation between the blades of the
AC plug and accessible conductive parts
(examples: metal panels, input terminals and
earphone jacks).

6. Insulation Checking Procedure: Disconnect the
power cord from the AC source and turn the
power switch ON. Connect an insulation
resistance meter (500V) to the blades of the AC
plug.

The insulation resistance between each blade
of the AC plug and accessible conductive parts
(see above) should be greater than 1 megohm.

7. Never defeat any of the B+ voltage interlocks.
Do not apply AC power to the unit (or any of
its assemblies) unless all solid-state heat sinks
are correctly installed.

8. Always connect a test instrumentÕs ground
lead to the instrument chassis ground before
connecting the positive lead; always remove
the instrumentÕs ground lead last.

Precautions

Samsung Electronics 1-3

Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between

the servicing and safety precautions, always follow the safety precautions.

Warning2: An electrolytic capacitor installed with the wrong polarity might explode.

1. Some semiconductor (Òsolid stateÓ) devices
are easily damaged by static electricity. Such
components are called Electrostatically
Sensitive Devices (ESDs); examples include
integrated circuits and some field-effect
transistors. The following techniques will
reduce the occurrence of component damage
caused by static electricity.

2. Immediately before handling any semicon
ductor components or assemblies, drain the
electrostatic charge from your body by
touching a known earth ground. Alternatively,
wear a discharging wrist-strap device. (Be
sure to remove it prior to applying powerÑ
this is an electric shock precaution.)

3. After removing an ESD-equipped assembly,
place it on a conductive surface such as
aluminum foil to prevent accumulation of
electrostatic charge.

4. Do not use freon-propelled chemicals. These
can generate electrical charges that damage
ESDs.

5. Use only a grounded-tip soldering iron when
soldering or unsoldering ESDs.

6. Use only an anti-static solder removal device.
Many solder removal devices are not rated as
Òanti-staticÓ; these can accumulate sufficient
electrical charge to damage ESDs.

7. Do not remove a replacement ESD from its
protective package until you are ready to
install it. Most replacement ESDs are
packaged with leads that are electrically
shorted together by conductive foam,
aluminum foil or other conductive materials.

8. Immediately before removing the protective
material from the leads of a replacement ESD,
touch the protective material to the chassis or
circuit assembly into which the device will be
installed.

9. Minimize body motions when handling
unpackaged replacement ESDs. Motions such
as brushing clothes together, or lifting a foot
from a carpeted floor can generate enough
static electricity to damage an ESD.

Precautions

1-4 Samsung Electronics

1-3 Precautions for Electrostatically Sensitive Devices (ESDs)

Samsung Electronics 2-1

2. Specifications

TELEVISION

Colour system PAL/SECAM Multistandard
Optional Systems L/L’ (Option), B/G (Option), D/K (Option), I (Option)
Number of channels 100
Tuning Range: Off-Air/Cable Hyperband/interband tuner
Aerial input 75 Ohms, coaxial cable

VCR

Format VHS standard (PAL/SECAM Option)/MESECAM (Option) /NTSC (playback only)
Heads Video: 2 rotary heads, LP (Option), 4 Heads (Option)

Audio/Control: 1 stationary head (linear)

Erase: 1 full track erase head
Video system CCIR standard
Audio system Mono
Luminance FM azimuth recording
Colour Down converted subcarrier phase shifted direct recording
Wow and flutter (WTD) 0.4% maximum (SP)
Frequency response 100Hz - 8 KHz

GENERAL

Power supply 220~240V; 50Hz; Option: 110~260V, 50~60Hz
Consumption 14 Inch (80W), 20 Inch (100W), 21 Inch (105W)
Audio output power 14 Inch (2.0 watts), 20 Inch, 21 Inch ( 2Watts x 2)
Number of loudspeakers 14 Inch (1), 20 Inch, 21 Inch (2)
Tube size 14” (37 cm), or 20” (51 cm), 21” (55 cm)
Tube type BLACK MATRIX
Sockets 1 full RGB SCART: Rear (Option); 1 RCA output (Option): Rear

1 RCA input (audio and video): Front

Earphones (3.5 mm mini-jack)

1 aerial/cable TV coaxial input
Dimensions (W x D x H) 14 Inch (362x383x382), 20 Inch (482x465x479), 21 Inch (502x494x498)
Weight 14 Inch (12.5kg), 20 Inch (22KG), 21 Inch (25kg)
Operating temperature 5°C - 40°C (41°F-104°F)
Relative humidity 10%-75%

MEMO

2-2 Samsung Electronics

Disassembly and Reassembly

Samsung Electronics 3-1

3. Disassembly and Reassembly

3-1 Disassembly

3-1-1 Back Cover Removal

Fig. 3-1

1. Remove the screws located on the side of the back cover.

2. Pull the Main Assembly backward and remove it from the front cabinet.

3-1-2 Main Assembly Removal

Disassembly and Reassembly

3-2 Samsung Electronics

Fig. 3-2

1. Release two connectors between sub PCB and Main Assembly.

2. Pull the Main Assembly backward. Remove it from the front cabinet.

3-1-3 Monitor Frame Removal

Disassembly and Reassembly

Samsung Electronics 3-3

Fig. 3-3

1. Remove 2 screws from the Main Assembly. Remove the dust cover.

2. Remove 2 screws from the Deck Assembly. Remove the dust-cover bracket.

Disassembly and Reassembly

3-4 Samsung Electronics

3-1-4 Deck Assembly Removal 3-1-5 Main Assembly Removal

1. Remove 4 screws holding the bottom cover.

2. Remove one screw from Main PCB
Assembly. Take out the deck assembly.

1. Remove 2 screws holding the upper chassis
housing.

2. Remove 3 screws holding the deck assembly.

3. Lift the deck assembly upward to remove.

Samsung Electronics 4-1

4-1 Deck Parts Locations

4-1-1 Deck (Top View)

1

2

3

4

5 6

7

8

9

10

11

12

13

141516

17

18

19

Fig.4-1 Deck Top Parts Location (DX7-A/DX8-A DECK ONLY)

4. Alignments and Adjustments (Mechanical)

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

4-1-2 Deck (Top View)

Alignments and Adjustments (Mechanical)

4-2

Samsung Electronics

1

2

3

465

7

8

9

10

11

12

13

14

151617

18

19

20

Fig.4-2 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

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-3

4-1-3 Deck (Bottom View)

1

2

3

4

6

5

7

8

9

10

11

13

12

Fig.4-3 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

Alignments and Adjustments (Mechanical)

4-4

Samsung Electronics

4-1-4 Housing View

1

2 3

4

6

5

Fig. 4-4 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

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-5

4-2 Housing Assembly

4-2-1 Removal from Main Base

1. Remove 3 Screws ① .

2. Lift the Housing AssÕy in the direction of arrow ÒBÓ, while pushing the tab ➁ in the direction of arrow

ÒAÓ. (Refer to detail drawing)

3 SCREWS

1

MAIN BASE

TAB

"A"

2

Fig. 4-5 Housing Ass’y Removal from Main Base

Alignments and Adjustments (Mechanical)

4-6

Samsung Electronics

4-2-2 Diassembly

2 SCREWS

UPPER CHASSIS

CHASSIS SIDE "R"

HOLDER

CASSETTE ASS'Y

SHAFT ARM ASS'Y

CHASSIS SIDE "L"

Fig. 4-6 Housing Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-7

4-2-3 Upper Chassis Removal

1. Remove 2 Screws ①.

2. Lift the Upper Chassis ➁ in the direction of arrow ÒAÓ.

2 SCREWS

UPPER CHASSIS

2

"A"

1

Fig. 4-7 Upper Chassis Removal

Alignments and Adjustments (Mechanical)

4-8

Samsung Electronics

4-2-4 Holder Cassette Ass’y and Chassis Side L/R Removal

1. Lift the Cassette Holder ① in the direction of arrow ÒAÓ (Refer to Fig. A).

2. Remove the Side Chassis ÒLÓ ② and ÒRÓ ➂ from Arm Shaft AssÕy ➃in the direction of arrow ÒBÓ, ÒCÓ

(Refer to Fig. B).

HOLDER CASSETTE ASS'Y

"A"

1

2

4

SHAFT ARM ASS'Y

CHASSIS SIDE "L"

3

CHASSIS 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. 4-8 Holder Cassette Ass’y and Chassis Side L/R

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-9

4-2-5 Chassis Side “R” Parts Locations

CHASSIS SIDE "R"

(SIDE VIEW "A")

SLIDE DAMPER

LEVER-LID OPENDER

"A"

SPRING-SLIDE DAMPER

SPRING-LID OPENDER

Fig. 4-9 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.

Alignments and Adjustments (Mechanical)

4-10

Samsung Electronics

4-2-6 Slide Damper Removal

1. Remove the Slide Damper Spring ①.

2. Push the Stopper ➂ of the Side Chassis ÒRÓ ➃. Move the Damper Slide ➁ 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. 4-10 Slide Damper Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-11

4-3 Cylinder Ass’y

4-3-1 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. 4-11 Exploded View of Cylinder Ass’y

Alignments and Adjustments (Mechanical)

4-12

Samsung Electronics

4-3-2 Head Cleaner Ass’y Removal (Only for Deck : DX7-AC/DX8-AC)

1. Release 1 tab ① in the direction of arrow ÒAÓ. (Refer to detail drawing)

2. Lift the Head Cleaner ➁ in the direction of arrow ÒBÓ.

ASS'Y HEAD CLEANER

"B"

2

TAB

<DETAIL>

"A"

1

Fig. 4-12 Head Cleaner Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-13

4-3-3 Cylinder Ass’y Removal from Main Base

1. Remove 3 Screws ① holding the Main Base and the Cylinder AssÕy.

2. Lift the Cylinder AssÕy ➁in the direction of arrow.

Note : Do not touch the video heads during removal or installation.

3 SCREWS

1

CYLINDER ASS'Y

2

Fig. 4-13 Cylinder Ass’y Removal from Main Base

Alignments and Adjustments (Mechanical)

4-14

Samsung Electronics

4-3-4 Holder FPC Removal

1. Release the Holder FPC tab holding the Cylinder Base ➁ in the direction of arrow.

(Refer to detail drawing)

2. Disconnect the Holder FPC ① from the Cylinder Base ➁.

3. Note : When disconnecting the FPC Holder ① from the Cylinder Base ➁ :

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. 4-14 Head Brush and Holder FPC Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-15

CYLINDER SUB ASS'Y

CYLINDER BASE

3 SCREWS

2

1

3

Fig. 4-15 Cylinder Ass’y Removal from Cylinder Base

4-3-5 Cylinder Ass’y Removal from Cylinder Base

1. Remove 3 Screws ① from the Cylinder Base ➁.

2. Lift the Cylinder AssÕy ➂ from the Cylinder Base ➁ in the direction of arrow.

Alignments and Adjustments (Mechanical)

4-16

Samsung Electronics

4-3-6 Motor Stator Removal

1. Remove 2 Screws ①.

2. Remove the Motor Stator ➁ from the Cylinder Sub AssÕy ➄.

3. Note : When disassembling the Motor-Stator, be careful not to loose the carbon-tip and spring.

MOTOR - STATOR

CYLINDER SUB ASS'Y

2

2SCREWS

1

5

SPRING

CARBON TIP

3

4

Fig. 4-16 Motor Stator Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-17

4-3-7 Motor Rotor Removal

1. Remove 2 Screws ①.

2. Lift The Motor Rotor②.

MOTOR - ROTOR

DRUM SUB ASS'Y

2

3

2 SCREWS

1

Fig. 4-17 Motor Rotor Removal

Alignments and Adjustments (Mechanical)

4-18

Samsung Electronics

4-3-8 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. 4-18 (Refer to phase matching hole).

2. Secure 2 Screws.

MOTOR - ROTOR

PHASE MATCHING HOLE

DRUM SUB ASS'Y

2

3

2 SCREWS

1

Fig. 4-18 Assembly of Motor Rotor and Cylinder Sub Ass’y

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-19

4-3-9 Motor Stator and Cylinder Sub Ass’y

1. Reinstall the Motor Stator ① toward the FPC cable of Cylinder Sub AssÕy ➁.

2. Secure 2 Screws. (Refer to Fig. 4-16)

MOTOR - STATOR

CYLINDER SUB ASS'Y

1

2

Fig. 4-19 Assembly of Motor Stator and Cylinder Sub Ass’y

Alignments and Adjustments (Mechanical)

4-20

Samsung Electronics

4-4 Main Deck Removal and Reassembly

4-4-1 Slide Rack Housing Removal

1. Lift the Slide Rack Housing.

SLIDE RACK HOUSING

Fig. 4-20 Slide Rack Housing Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-21

4-4-2 Assembly of Slide Rack Housing and Master Gear

1. Confirm that the hole of Master Gear ① and the hole ÒAÓ of Main Base are aligned correctly. (Eject mode)

2. Align the Slot #1 of Master Gear ①with the Tooth #1 of Rack Housing Slide ➁. (Refer to timing point)

(SLIDE VIEW)

DETAIL

A

TIMING POINT

SLOT #1

TOOTH #1

GEAR MASTER

( TOP VIEW )

( SIDE VIEW )

1

SLIDER RACK
HOUSING

ARM " R"

2

Fig. 4-21 Assembly of Slide Rack Housing and Gear Master

Alignments and Adjustments (Mechanical)

4-22

Samsung Electronics

4-4-3 Brake Sub “L” Removal

1. Remove the Sub ÒLÓ Brake Spring ①.

2. Release the tab ➁ in the direction of arrow. (Refer to detail drawing)

3. Lift the Sub ÒLÓ Brake ➂.

<DETAIL>

BRAKE SUB "L"3

TAB2

SPRING-BRAKE SUB "L"1

BRAKE SUB "L"3

Fig. 4-22 Brake Sub “L” Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-23

4-4-4 Tension Arm Full Ass’y Removal

1. Remove the Tension Spring ①.

2. Release the tab ➁ in the direction of arrow. (Refer to detail drawing)

3. Lift the Tension Arm Full AssÕy ➂.

<DETAIL>

SPRING TENSION1

TENSION ARM FULL ASS'Y3

TAB2

TENSION ARM FULL ASS'Y 3

Fig. 4-23 Tension Arm Full Ass’y Removal

Alignments and Adjustments (Mechanical)

4-24

Samsung Electronics

4-4-5 JOG LEVER Ass’y Removal (Only for deck : DX8-A/DX8-AC)

1. Remove the 1 Screw ①.

2. Lift the JOG Lever AssÕy ➁.

<TOP VIEW>

1 SCREW1

JOG LEVER ASS'Y

LEVER JOG ASS'Y

2

TIMING

Fig. 4-24 JOG Lever Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-25

4-4-6 Relay Gear “S” and Reel Disk “L” Removal

1. Release the tab ① in the direction of arrow. (Refer to detail drawing)

2. Lift the Reel Disk ÒLÓ ➁.

3. Remove the Plain Washer ➂.

4. Remove the Slit Washer ➃.

5. Lift the Relay ÒSÓ Gear AssÕy ⑤.

6. Note : When reinstalling, be sure to install the Reel Disk ÒLÓ ✠ after installing the Plain Washer.

<DETAIL>

REEL-DISK "L" 2

TAB

1

WASHER-PLAIN3

REEL-DISK "L" 2

WASHER-SLIT4

GEAR-RELAY "S" ASS'Y5

Fig. 4-25 Reel Disk “L” and Gear Relay “S” Ass’y Removal

Alignments and Adjustments (Mechanical)

4-26

Samsung Electronics

4-4-7 Sub Brake “R” Ass’y Removal

1. Remove the Sub ÒRÓ Brake Spring ①.

2. Release the tab ➁ in the direction of arrow. (Refer to detail drawing)

3. Lift the Brake Sub ÒRÓ AssÕy ➂.

SPRING-SUB BRAKE "R"1

SUB-BRAKE "R" ASS'Y3

SUB-BRAKE "R" ASS'Y

<DETAIL>

3

TAB2

Fig. 4-26 Sub Brake “R” Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-27

4-4-8 Reel Disk “R” Ass’y and Relay “T”Gear Removal

1. Release the tab ① in the direction of arrow. (Refer to detail drawing)

2. Lift the Reel Disk ÒRÓ AssÕy ➁.

3. Remove the Plain Washer ➂.

4. Remove the Slit Washer ➃.

5. Lift the Relay ÒTÓ Gear AssÕy ➄.

Note : When reinstalling, be sure to install the Reel Disk ÒRÓ AssÕy ✠ after installing the Plain Washer ➂.

REEL-DISK "R" ASS'Y

<DETAIL>

2

TAB1

REEL-DISK "R" ASS'Y2

WASHER-PLAIN3GEAR-RELAY "T"5

WASHER-SLIT4

Fig. 4-27 Reel Disk “R” Ass’y and Gear Relay “T” Removal

Alignments and Adjustments (Mechanical)

4-28

Samsung Electronics

4-4-9 Main Brake “L”, “R” Ass’y Removal

1. Release the Main Brake Spring ①.

2. Release the tab ➁ in the direction of arrow ÒAÓ. (Refer to detail drawing A)

3. Lift the Main Brake ÒLÓ ➂.

4. Release the tab ➃ in the direction of arrow ÒBÓ. (Refer to detail drawing B)

5. Lift the Main ÒRÓ Brake ➄.

MAIN-BRAKE "R" ASS'Y5

MAIN-BRAKE "L" ASS'Y

<DETAIL A> <DETAIL B>

3

TAB

"A"

"B"

2

MAIN-BRAKE "R" ASS'Y5

TAB4

MAIN-BRAKE "L" ASS'Y3

SPRING-BRAKE MAIN1

Fig. 4-28 Brake Main “L”, “R” Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-29

4-4-10 Idler Ass’y Removal

1. Remove the Slit Washer ①.

2. Lift the Idler AssÕy ➁.

IDLER-ASS'Y2

WASHER-SLIT1

Fig. 4-29 Idler Ass’y Removal

Alignments and Adjustments (Mechanical)

4-30

Samsung Electronics

4-4-11 Pinch Roller Unit

1. Remove the Slit Washer ①.

2. Lift the Pinch Roller Unit ➁.

3. Lift the Arm Pinch Spring ➂.

PINCH ROLLER-UNIT2

WASHER-SLIT1

SPRING-ARM PINCH3

Fig. 4-30 Pinch Roller Unit Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-31

4-4-12 Assembly of Pinch Roller Unit

1. Install the Pinch Roller Unit as shown in Fig. 4-31. (Refer to A, B)

MOTOR - D.D CAPSTAN

PINCH ROLLER -UNIT

SLIDER - PINCH

(TOP VIEW)

"B"

SLIDER - PUSH

"A"

Fig. 4-31 Assembly of Unit Pinch Roller

Alignments and Adjustments (Mechanical)

4-32

Samsung Electronics

4-4-13 Exploded View of Pinch Lever Comp Ass’y,

Pinch Cam Lever, Review Arm Ass’y and Review Lever Ass’y

PINCH COMP-LEVER ASS'Y

PINCH CAM-LEVER

REVIEW-ARM ASS'Y

REVIEW-LEVER

Fig. 4-32 Exploded View of Pinch Lever Comp Ass’y, Pinch Cam Lever, Arm Review Ass’y and Lever Review Ass’y

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-33

4-4-14 Pinch Lever Comp Removal

1. Release the tab ① in the direction of arrow. (Refer to detail drawing)

2. Lift the Pinch Lever Comp AssÕy ②.

Note : DonÕt touch the Pinch Lever AssÕy ① to Audio Head Base during removal.

PINCH-LEVER COMP ASS'Y2

PINCH-LEVER COMP ASS'Y2

TAB

<DETAIL>

1

Fig. 4-33 Pinch Lever Comp Ass’y Removal

Alignments and Adjustments (Mechanical)

4-34

Samsung Electronics

4-4-15 Pinch Cam Lever Removal

1. Release the tab ① in the direction of arrow. (Refer to detail drawing)

2. Lift the Pinch Cam Lever ✠➁.

PINCH-LEVER CAM2

TAB

<DETAIL>

1

PINCH-LEVER CAM2

Fig. 4-34 Pinch Cam Lever Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-35

4-4-16 Review Arm Ass’y Removal

1. Push the Stopper tab ① in the direction of arrow.

2. Pull the Review Arm AssÕy ➁ in the direction of arrow ÒAÓ and then confirm as in detail B. ÒBÓ.

(Refer to detail drawing ÒAÓ)

3. Release the tab ➂ in the direction of arrow and then lift the Review Arm AssÕy ➁.

4. Note : Be careful not to damage when removing the Review Arm AssÕy ➁. (See Detail B.)

REVIEW-ARM ASS'Y2

STOPPER TAB1

TAB

<DETAIL B>

3

ARM REVIEW ASS'Y2

B

A

<DETAIL A>

REVIEW-ARM ASS'Y2

Fig. 4-35 Arm Review Ass’y Removal

Alignments and Adjustments (Mechanical)

4-36

Samsung Electronics

4-4-17 Review Lever Removal

1. Release the tab ① in the direction of arrow. (Refer to detail drawing)

2. Lift the Review Lever ➁.

REVIEW-LEVER2

TAB

<DETAIL>

1

Fig. 4-36 Review Lever Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-37

4-4-18 Capstan Belt Removal

1. Remove the Capstan Belt ①.

2. Note : Be careful not to touch the grease when removing or reinstalling.

CAPSTAN-BELT1

Fig. 4-37 Capstan Belt Removal

Alignments and Adjustments (Mechanical)

4-38

Samsung Electronics

4-4-19 Capstan Brake Ass’y Removal

1. Remove the Capstan Brake Spring ①.

2. Release the tab ➁ in the direction of arrow. (Refer to detail drawing)

3. Lift the Capstan Brake AssÕy ➂.

CAPSTAN SPRING BRAKE 1

CAPSTAN BRAKE ASS'Y

CAPSTAN BRAKE ASS'Y3

TAB2

<DETAIL>

3

Fig. 4-38 Capstan Brake Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-39

4-4-20 Capstan Direct Drive (D.D) Motor Removal

1. Remove 3 Screws ①. (Top view)

2. Lift the Capstan D.D Motor ➁ in the direction of arrow. (Bottom view)

MOTOR D.D CAPSTAN2

<BOTTOM VIEW>

3 SCREWS1

<TOP VIEW>

Fig. 4-39 Capstan D.D Motor Removal

Alignments and Adjustments (Mechanical)

4-40

Samsung Electronics

4-4-21 Clutch Ass’y Removal

1. Remove the Slit Washer ①.

2. Lift the Clutch AssÕy ➁.

3. Remove the Plain Washer ➂.

WASHER-SLIT1

CLUTCH ASS'Y2

WASHER-PLAIN3

Fig. 4-40 Clutch Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-41

4-4-22 Master Gear Removal

1. Remove the Slit Washer ①.

2. Lift the Master Gear ➁.

WASHER-SLIT1

GEAR MASTER2

Fig. 4-41 Master Gear Removal

Alignments and Adjustments (Mechanical)

4-42

Samsung Electronics

4-4-23 Assembly of Master Gear

1. When reinstalling, be sure to align the arrow of the Master Gear ①with home Gear of the Worm-Wheel
Gear ➁. (Refer to timing point)

MASTER GEAR

1

WORM- WHEEL GEAR

LOADING UNIT

2

TIMING

Fig. 4-42 Master Assembly of Gear

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-43

4-4-24 Loading Unit Removal

1. Remove 2 Screws ①.

2. Lift the Loading Unit ➁ in the direction of the arrow.

2 SCREWS1

LOADING UNIT2

Fig. 4-43 Loading Unit Removal

Alignments and Adjustments (Mechanical)

4-44

Samsung Electronics

4-4-25 Slide Pinch Lever Removal

1. Remove the Slit Washer ①.

2. Lift the Slide Pinch Lever ➁.

SLIT WASHER1

SLIDER PINCH LEVER2

Fig. 4-44 Slide Pinch Lever Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-45

4-4-26 Assembly of Slide Pinch Lever

1. Pull the Slide Lever ① to the end in the direction of arrow.

2. Insert the Slide Lever ① into the hole of Slide Pinch Lever ➁. (Refer to detail ÒAÓ)

SLIDE - PINCH1

SLIDE PINCH LEVER

A

2

MAIN SLIDE

SLIDE - PINCH BOSS

3

Fig. 4-45 Assembly of Slide Pinch Lever

Alignments and Adjustments (Mechanical)

4-46

Samsung Electronics

4-4-27 Main Slide Removal

1. Remove the Slit Washer ①.

2. Release 3 tabs ➁, ➂, ➃ in the direction of arrow.

3. Lift the Main Slide ➄.

SLIT WASHER1

MAIN SLIDER5

TAB2

TAB3

TAB4

Fig. 4-46 Slide Main Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-47

4-4-28 Assembly of Main Slide

1. Install the shaft of Loading ÒRÓ Gear AssÕy into the left of the Main Slide Hole and secure with the

Slit Washer ➁. (Refer to detail ÒAÓ)

2. Insert the Tension Control Lever ➂ and the Idler Change Lever ➃ into the Main Slide Hole.

(Refer to detail ÒBÓ)

3. After confirming the above items 1, 2 install the Main Slide and secure with tabs (a, b, c).

4. Note : Be sure to assemble the Main Slide while the Loading L/R Gear AssÕy is in unloading position.

LOADING GEAR "R"ASS'Y

LOADING GEAR "L "ASS'Y

1

IDLER CHANGE LEVER

MAIN SLIDE

4

TENSION CONTROL LEVER

3

SLIT WASHER

"a"

"d"

"b"

"C"

"B"

"A"

2

Fig. 4-47 Assembly of Slide Main

Alignments and Adjustments (Mechanical)

4-48

Samsung Electronics

4-4-29 Shift Lever Ass’y Removal

1. Hang the Lever Shift Spring ① to the claw of the Shift Lever ➂. (Refer to detail drawings A, B)

2. Release the tab ➁ in the direction of arrow.

3. Lift the Shift Lever ➂.

SHIFT LEVER SPRING 1

SHIFT LEVER3

<DETAIL A>

<DETAIL B>

TAB2

SHIFT LEVER SPRING 1

SHIFT LEVER SPRING

CLAW

1

SHIFT LEVER 3

Fig. 4-48 Shift Lever Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-49

4-4-30 Lever Changes Idler Removal

1. Release the tab ① in the direction of arrow. (Refer to detail drawing)

2. Lift the Lever Change Idler ➁.

LEVER IDLER CHANGE 2

TAB

<DETAIL>

<TOP SIDE>

<BOTTOM VIEW>

MAIN BASE

1

LEVER IDLER CHANGE2

Fig. 4-49 Idler Change Lever Removal

Alignments and Adjustments (Mechanical)

4-50

Samsung Electronics

4-4-31 Loading “L” Gear , “R” Gear Ass’y Removal

1. Remove the Loading ÒRÓ Gear AssÕy ➁from the Roller ÒTÓ Guide ➂by pushing the Loading ÒRÓ Spring

① in the direction of arrow. (Refer to detail drawing A)

2. Remove the Loading ÒLÓ Gear AssÕy ➄from the Roller ÒSÓ Guide ➅by pushing the Loading ÒLÓ Spring

➃ in the direction of arrow. (Refer to detail drawing B)

3. Lift the Loading ÒRÓ Gear AssÕy ➁.

4. Lift the Loading ÒLÓ Gear AssÕy ➄by pushing the tab ⑦of the Loading ÒLÓ Gear AssÕy ➄.

(Refer to detail drawing C)

LOADING GEAR "L" ASS'Y5

TAB

<DETAIL C>

7

LOADING GEAR "R" ASS'Y2

SLIDE LOADING GEAR
ASS'Y "T"

3

SLIDE LOADING GEAR
ASS'Y "S"

6

<DETAIL A >

<DETAIL B>

LOADING GEAR "L" ASS'Y5

SPRING LOADING "L" ASS'Y4

LOADING GEAR "R" ASS'Y 2

SPRING LOADING "R" ASS'Y

1

Fig. 4-50 Loading Gear “L”, “R” Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-51

4-4-32 Assembly Loading Gear “L”, “R”

1. When reinstalling, be sure to align 2 arrow as shown in Fig. 4-51. (Refer to timing point)

ALIGN TWO ARROWS

LOADING GEAR
" R" ASSEMBLY

LOADING GEAR
" L" ASSEMBLY

TIMING POINT

Fig. 4-51 Assembly Loading Gear “L”, “R”

Alignments and Adjustments (Mechanical)

4-52

Samsung Electronics

4-4-33 Pinch Slide Removal

1. Push the tab ① in the direction of arrow ÒAÓ. (Refer to detail drawing)

2.Lift the Pinch Slide ➁ in the direction of arrow ÒBÓ.

PINCH SLIDER 2

"A"

"B"

TAB

MAIN BASE

<DETAIL>

1

"A"

Fig. 4-52 Pinch Slide Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-53

4-4-34 Push Slide Removal

1. Remove the Slide Push Spring ①.

2. Push the Slide ➁ in the direction of arrow ÒAÓ.

3. Lift the Push Slide ➁ by pushing the tab ➂ in the direction of arrow ÒBÓ. (Refer to detail drawing)

SLIDER PUSH SPRING 1

PUSH SLIDER 2

"A"

PUSH SLIDER

<DETAIL-TOP VIEW>

2

TAB

"B"

3

Fig. 4-53 Push Slide Removal

Alignments and Adjustments (Mechanical)

4-54

Samsung Electronics

4-4-35 LED Prism Removal

1. Release the tab ① in the direction of arrow. (Refer to detail drawing)

2.Lift the LED Prism ➁.

LED PRISM 2

LED PRISM

<DETAIL-TOP VIEW>

TAB1

Fig. 4-54 LED Prism Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-55

4-4-36 Record Switch Lever Removal

1. Remove the Record Switch Spring ①.

2. Release the tab ➁ in the direction of arrow. (Refer to detail drawing)

3. Lift the Record Switch Lever ➂.

REC S/W SPRING 1

3 REC S/W LEVER

2

TAB

3 REC S/W LEVER

<DETAIL>

MAIN BASE

Fig. 4-55 Record Switch Lever Removal

Alignments and Adjustments (Mechanical)

4-56

Samsung Electronics

4-4-37 Full Erase Head Removal

1. Remove 1 Screw①.

2. Lift the F/E Magnet Head ➁.

1 SCREW1

F/E HEAD MAGNET 2

Fig. 4-56 Full Erase Head Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-57

4-4-38 ACE Head Removal and Reassembly

1. Release the tab ① holding ACE Holder toward arrow. (Refer to detail drawing A)

2. Remove 1 Screw ➁.

3. Lift the Magnet ACE Head AssÕy ➂.

4. Assembly : When reinstalling, be sure to align the 3 teeth of X-Position adjustment gear with the 2 slots

of the ACE Head Base.

5. Note : When adjusting the X-Position adjustment gear using (+) driver, do not apply too much force.

MAGNET ACE HEAD ASS'Y3

1 SCREW2

X-POSITION ADJUST

ACE HEAD BASE

<DETAIL B>

TIMING POINT

1 TAB

ACE HOLDER

<DETAIL A>

Fig. 4-57 ACE Head Ass’y Removal and Reassembly

Alignments and Adjustments (Mechanical)

4-58

Samsung Electronics

4-4-39 Removal of Gear Loading Sildes “S” and “T”

1. Remove the Cylinder AssÕy from the Main Base. (Refer to Fig. 4-12, 4-13)

2. Remove the Slide ÒSÓ, ÒTÓ from the Loading ÒLÓ, ÒRÓ Gear AssÕy. (Refer to Fig. 4-51)

3. Move the Roller ÒSÓ, ÒTÓ Guide AssÕy to slot and then lift it to remove. (Refer to arrow)

SLIDE GEAR LOADING
ASS'Y "S"

SLIDE GEAR LOADING
ASS'Y "T"

Fig. 4-58 Slide Guide Roller “S”, “T” Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-59

4-4-40 Assembly of Guide Roller Slides “S”, “T” Ass’y

(When all parts except the Cylinder Ass’y are removed.)

1. Push 4 Lever Locks ① of the Housing AssÕy Simultaneously. (Refer to Fig. 4-59)

2. Push the Cassette AssÕy Holder ➂toward arrow ÒBÓ while turning the Master Gear ➁toward arrow AÓ.

(Refer to Fig. 4-59)

3. Load the Loading L, R Gear AssÕy ➃, ➄ to the middle position of Guide Rail by turning the Master Gear

➁ toward arrow ÒAÓ. (Refer to Fig. 4-59, 4-60)

4. Install the Guide Roller S, T Slide ➅, ➆ into the Rail slot and then move it to the position of Loading
Gear L, R AssÕy ➃, ➄. (Refer to Fig. 60)

5. Turn the Master Gear ➁ toward arrow ÒAÓ. (Eject mode)

CASSETTE ASS'Y HOLDER

"B"

"A"

3

MASTER GEAR

LOCK LEVER

1

2

Fig.4-59 How to operate the Housing Ass’y

Alignments and Adjustments (Mechanical)

4-60

Samsung Electronics

SLIDER - G / R

ASSEMBLY (S)

6

GEAR - LOADING

" L" ASSEMBLY

4

GEAR - LOADING

" R " ASSEMBLY

5

SLIDER - G / R
ASSEMBLY (T)

7

Fig. 4-60 Assembly of Guide Roller Slides “S”and “T”

Use grease on the following parts every 1,000
hours. (See exploded view for location) :

1. Between base pole assembly (L, R) and main
base

2. Gear Loading L, R

3. Slide Main

4. Lever Shift

5. Gear Master

6. Lever Slide Pinch

7. Pinch Roller

8. Slide Pinch

9. Base Cylinder

Oil may be required for the following parts after
1,000 hours. (See exploded view for location) :

Main Base

1. Arm Tension molding

2. Shaft Reel Disk L, R

3. Shaft Gear Relay S, T

4. Shaft Idler

5. Shaft Clutch

Other parts which are not listed above do not
require lubrication, except when parts are
replaced. Use appropriate oil or grease as
indicated on the exploded view.

4-5 Cleaning and Lubrication

4-5-1 Cleaning Tape Mechanism

Periodic cleaning of the tape mechanism is neces­sary. To clean the following parts, use patch and
solvent :

1. Capstan Shaft

2. All tape guide posts

3, Clutch Pulley

4. Pinch roller

5. Belt Capstan

6. Capstan Motor Pulley

4-5-2 Cleaning of Rotating and Stationary

Heads

To clean video heads, full erase head, and the
audio/control (A/C) head use a head cleaning kit
and solvent.

Note : When cleaning video heads, move the

cleaning stick in the direction of head
rotation (wiping in a vertical direction may
damage the heads.)

Press a chamois cloth which has been dipped in
cleaning fluid lightly against the rotating Cylinder
AssÕy. Clean slowly by rotating the Upper
Cylinder AssÕy by hand.

Note : Never turn the Motor on when cleaning.

4-5-3 Lubrication of Tape Mechanism

The tape transport mechanism is properly lubri­cated at the factory. In normal use cycles, and
with average environmental conditions, addition­al lubrication should not be required during the
first year of operation.

Depending on the frequency of use and environ­mental conditions, periodic lubrication may be
required. When lubricating, first remove the old
lubricant, then sparingly apply new lubricant.
Excessive lubricant is transferred to other assem­blies, malfunction will result.

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-61

NO DESCRIPTION SUBPARTS LOCATE REMARK

1 BASE MAIN ASS’Y GREASE TOP VIEW
2 MOTOR D.D CAPSTAN 3 SCREWS TOP VIEW
3 LEVER JOG ASS’Y 1 SCREW TOP VIEW DX8-A/DX8-AC
4 GEAR RELAY “S” ASS’Y 1 WASHER SLIT TOP VIEW
5 GEAR RELAY “T” ASS’Y 1 WASHER SLIT TOP VIEW
6 IDLER ASS’Y 1 WASHER SLIT TOP VIEW
7 REEL DISK “L” ASS’Y 1 WASHER PLAIN TOP VIEW
8 REEL DISK “R” ASS’Y 1 WASHER PLAIN TOP VIEW

9 ARM TENSION FULL ASS’Y TOP VIEW
10 SLIDE G/R ASS’Y (S) TOP VIEW
11 SLIDE G/R ASS’Y (T) TOP VIEW
12 SLIDE PUSH TOP VIEW
13 SLIDER PINCH GREASE TOP VIEW
14 GEAR LOADING “L” ASS’Y BOTTOM VIEW
15 GEAR LOADING “R” ASS’Y BOTTOM VIEW
16 LEVER IDLER CHANGE BOTTOM VIEW
17 LEVER SHIFT ASS’Y SPRING GUIDE BOTTOM VIEW
18 SLIDER MAIN 1 WASHER SLIT BOTTOM VIEW
19 LEVER SLIDER PINCH 1 WASHER SLIT BOTTOM VIEW
20 CLUTCH ASS’Y 1 WASHER SLIT, PLAIN BOTTOM VIEW
21 BRAKE CAPSTAN ASS’Y BOTTOM VIEW
22 SPRING BRAKE CAPSTAN BOTTOM VIEW
23 UNIT LOADING 2 SCREWS BOTTOM VIEW
24 GEAR MASTER 1 WASHER SLIT BOTTOM VIEW
25 BELT CAPSTAN BOTTOM VIEW
26 LEVER REVIEW TOP VIEW
27 ARM REVIEW ASS’Y TOP VIEW
28 LEVER PINCH CAM TOP VIEW
29 LEVER PINCH COMP ASS’Y TOP VIEW
30 SPRING ARM PINCH TOP VIEW
31 UNIT PINCH ROLLER 1 WASHER SLIT TOP VIEW
32 BRAKE MAIN “L” ASS’Y TOP VIEW
33 BRAKE MAIN “R” ASS’Y TOP VIEW
34 SPRING BRAKE MAIN TOP VIEW
35 BRAKE SUB “L” ASS’Y TOP VIEW
36 BRAKE SUB “R” ASS’Y TOP VIEW
37 SPRING BRAKE SUB “L” TOP VIEW
38 SPRING BRAKE SUB “R” TOP VIEW

Alignments and Adjustments (Mechanical)

4-62

Samsung Electronics

THE ASSEMBLY PROCEDURE FOR DECK PARTS

NO DESCRIPTION SUBPARTS LOCATE REMARK

39 PRISM LED TOP VIEW
40 SLIDER RACK HOUSING TOP VIEW
41 LEVER REC S/W TOP VIEW
42 SPRING REC S/W TOP VIEW
43 SPRING TENSION TOP VIEW
44 SPRING SLIDE PUSH TOP VIEW
45 MAGNET ACE HEAD ASS’Y 1 SCREW TOP VIEW
46 HOUSING ASS’Y 3 SCREWS TOP VIEW
47 CYLINDER ASS’Y 3 SCREWS TOP VIEW
48 MAGNET F/E HEAD 1 SCREW TOP VIEW

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-63

Alignments and Adjustments (Mechanical)

4-64

Samsung Electronics

4-6 Tape Transport System and Adjustment Locations

The tape transport system has been adjusted precisely in the factory. Alignment is not necessary except for
the following :

1. Noise observed on the screen.

2. Tape damage.

3. Parts replacement in the tape transport system.

Lower flange height of tape guide is used as the reference for the transport adjustment.
To maintain the height of the tape guide and prevent damage, do not apply excessive force onto the main
base.

CYLINDER ASS'Y

#3 GUIDE SHAFT

#1 GUIDE POLE

REVIEW GUIDE POLE

PINCH ROLLER

TAKE UP REEL DISK

ADJUSTING ;

#8 GUIDE SHAFT

CHECKING ;

SUPPLY REEL DISK

FULL ERASE HEAD

TENSION POLE

GUIDE ROLLER T

GUIDE ROLLER S

TILT SCREW

X POSITION ADJUST GEAR

HEIGHT SCREW

AZIMUTH SCREW

CAM TENSION

Fig. 4-61 Location of Tape Transport Adjustment

Fig. 4-62 Tape Travel Diagram

POLE TENSION

MAIN BASE

FE HEAD

CYLINDER ASS'Y PINCH ROLLER

GUIDE ROLLER "S"

GUIDE ROLLER "T"

#8 GUIDE SHAFT

CAPSTAN SHAFT

ACE HEAD

#1 GUIDE POLE

#3 GUIDE SHAFT

REVIEW POLE

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-65

4-7 Tape Transport System Adjustment

When parts are replaced, perform the required adjustments by referring to precedures for the tape trans­port system. If there are any changes to the tape path, first run a T-120 (E-180) tape and make sure excessive
tape wrinkle does not occur at the tape guides.

1. If tape wrinkle is observed at the S, T-guide rollers, turn the S, T-guide rollers until wrinkle disappears.

2. If the tape wrinkle is still observed at the tape guide, perform the tilt adjustment of the A/C head.
(See page 5-1 of the Service Manual for Test Point Locations.)

4-7-1 A/C Head Assembly Adjustment

4-7-1 (a) A/C HEAD HEIGHT ADJUSTMENT

1. Run the alignment tape (Color bar) in the playback mode.

2. Observe surface of the audio head using a dental mirror.

3. Turn screw (A), (B), (C) clockwise or counterclockwise until the gap of lower tape edge and the lower
edge of the control head is about 0.25 mm. (Refer to Fig. 4-3 and 4-4)

SCREW(C)
TILT ADJUST

X-POSITION
ADJUST GEAR

HOLE

SCREW(A)
HEIGHT ADJUST

SCREW(B)
AZIMUTH ADJUST

SCREW(D)
X-POINT LOCKING

CONTROL HEAD

0 ~0.25 mm

AUDIO HEAD

VIDEO TAPE

Fig. 4-63 Location of A/C Head Adjustment Screw

Fig. 4-64 A/C Head Height Adjustment

Alignments and Adjustments (Mechanical)

4-66

Samsung Electronics

4-7-1 (b) A/C HEAD TILT ADJUSTMENT

1. Play back a T160 (E-240) tape and observe the position of the tape at the lower flange of tape guide.

2. Confirm that there is no curl or wrinkle at the lower flange of tape guide as shown in Fig.2- 5 (B)

3. If a curl or wrinkle of the tape occurrs, slightly turn the screw (C) tilt adjust on the A/C Head assÕy.

4. Reconfirm the A/C head height.

Fig. 4-64 Tape Guide Check

4-7-1 (c) AUDIO AZIMUTH ADJUSTMENT

1. Load alignment tape (Mono scope) and playback the NTSC : 7KHz (PAL : 6KHz) signal.

2. Connect channel-1 scope probe to audio output test point.

3. Adjust screw (B) to achieve maximum audio level (See Fig. 4-3).

WRINKLE

(GOOD)

(BAD)

(A) (B)

4-7-1 (d) A/C HEAD POSITION (X-POINT) ADJUSTMENT

1. See page 5-2 of the Service Manual for A/C Head position (X-Point) adjustment.

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-67

4-7-2 Linearity adjustment (S, T-guide rollers adjustment)

1. Play back the Mono Scope alignment tape (SP mode).

2. Observe the video envelope signal on an oscilloscope (triggered by the video switching pulse).

3. Make sure the video envelope waveform (at its minimum) meets the specification shown in Fig. 4-65.
If it does not, adjust as follows :

Note : a=Maximum output of the video RF envelope.

b=Minimum output of the video RF envelope at the entrance side.
c=Minimum output of the video RF envelope at the center point.
d=Maximum output of the video RF envelope at the exit side.

Fig. 4-65 Envelope Waveform Adjustment

a

a b c d
c,b,d/a

63%

bcd

4. If the section A in Fig. 4-66 does not meet the specification, adjust the S-guide roller up or down.

5. If the section B in Fig. 4-66 does not meet the specification, adjust T-guide roller up or down.

Fig. 4-66 Adjustment Points

AB

A B

ENVELOPE

H'D SWITCHING
PULSE

Alignments and Adjustments (Mechanical)

4-68

Samsung Electronics

6. Play back the Mono Scope alignment tape (SP mode).

7. Connect an oscilloscope CH-1 to the Envelope and CH-2 to the HÕD SW Pulse for triggering.

8. Turn the guide roller heads with a flat head ( ) driver to obtain a flat video RF envelope as shown in
Fig. 4-67.

9. After the adjustment is completed, tighten the set screws.

IDEAL ENVELOPE

L HEIGHT
TOO HIGH

GUIDE ROLLER (L)

GUIDE ROLLER (R)

L HEIGHT
TOO LOW

R HEIGHT
TOO LOW

R HEIGHT
TOO HIGH

Fig. 4-67 S, T-Guide Roller Height Adjustment

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-69

4-7-3 Check Transitional Operation from RPS to Play

Check transition from RPS mode to play mode : Using a pre-recorded SP tape, make sure the entry side of
envelope comes to an appropriate steady state within 3 seconds (as shown in Fig. 4-68). If the envelope
waveform does not reach specified peak-to peak amplitude within 3 seconds, adjust as follows :

1. Make sure there is no gap between the supply roller lower flange and the tape.
If there is a gap, adjust the supply guide roller again.

2. Change operation mode from the RPS to the play mode (again) and make sure the entry side of envelope
rises within 3 second.

ENTRANCE SIDE
ENVELOPE

Fig. 4-68 Video Envelope Rising when Operation mode Changes from RPS to Play Mode

4-7-4 Envelope Check

1. Make recordings on T-120 (E-120) and T-160 (E-180) tape. Make sure the playback output envelope meets
the specification as shown in Fig. 4-69.

2. Play back a self recorded tape (recording made on the unit using with T-120, E-120). The video envelope
should meet the specification as shown in Fig. 4-69. In SP mode, (A) should equal (B). If the head gap is
wide, upper cylinder should be checked.

A

B

Fig. 4-69 Envelope Output and Output Level

Alignments and Adjustments (Mechanical)

4-70

Samsung Electronics

4-7-5 Tape Wrinkle Check

1. Run the T-160 (E-240) tape in the playback, FPS, RPS and Pause modes and observe tape wrinkle at each
guide.

2. If excessive tape wrinkle is observed, perform the following adjustments in Playback mode :

3 Tape wrinkle at the S, T-guide roller section : Linearity adjustment.
3 Tape wrinkle at tape guide flange : A/C head assembly coarse adjustment.

MODE TORQUE g/cm GAUGE

PB/REC 100 ± 30 Cassette Torquemeter

RPS 170 ± 30 Cassette Torquemeter

FF/REW Minimum 600 Torque Gauge

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-71

4-8 Reel Torque

4-8-1 Reel Torque

1. The rotation of the capstan motor drives the clutch assÕy through the capstan motor belt.

2. Brake operation and shift operation in FF/REW are done by a leverslide.

3. Transportation of accurate driving force is done by gears (clutch assÕy).

Note : If the spec does not meet the followings specifications, replace the clutch assÕy and then recheck.

4-8-2 Location of Tension Pole and Back Tension Adjustments

1. Remove the housing assÕy and set the deck to ÒPLAYÓ mode.

2. Adjust the tension cam to 0 ~ -0.5mm from the center of supply roller.

3. The back tension meter should read 41 ~ 51g.cm. (PAL : 40 ~ 47g.cm)

Counterclockwise : Torque UP
Clockwise : Torque DOWN

F/E HEAD

ARM - TENSION

3 0.5mm

TENSION BAND

CAM TENSION

SPRING TENSION

ADJUST

FULL ASSEMBLY

10

20

30

VCM-11

40

50

Fig. 4-70 Tension Pole and Back Tension Adjustment

Fig. 4-71 Back Tension Tape Torque Cassette

5-2 Factory (“Service”) Mode

Alignment and Adjustments (Electrical)

Samsung Electronics 5-1

5. Alignment and Adjustments (Electrical)

5-1 Preadjustment

5-1-1 Factory Mode

1. Do not attempt these adjustments in the Video

Mode.

2. The Factory Mode adjustments are necessary

when either the EEPROM (IC902) or the CRT
is replaced.

3. Do not tamper with the ÒAdjustmentÓ screen

of the Factory Mode menu. This screen is
intended only for factory use.

5-1-2 When EEPROM (IC902) Is Replaced

1. When IC902 is replaced all adjustment data

revert to initial values. It is necessary to re­program this data.

2. After IC902 is replaced, warm up the TV for

10 seconds.

5-1-3 When CRT Is Replaced

1. Make the following adjustments AFTER set­ting up after setting up purity and conver­gence:

White Balance
Sub-Brightness
Vertical Center
Vertical Size
Horizontal Size

2. If the eeprom or CRT is replaced, set PSL and
PVA to 15 and 63 (Factory Mode).

5-2-1 Procedure for the “Adjustment” Mode

1. This mode uses the standard remote control.
The Service Mode is activated by: (1) pressing
the ÒHIDDENÓ service key on the local-key­board, or (2) by entering the following remote­control sequence (within 2 seconds):

STAND-BY→P.STD →MENU→ SLEEP→

POWER ON

2. The ÒSERVICE (FACTORY)Ó message will be
displayed. The Service Mode has these compo­nents: Adjustment, Option Bytes and Reset.

3. Access the Adjustment Mode by pressing the
ÒVOLUMEÓ keys ( Up or Down). The adjust­ment parameters are listed in the accompany­ing table, and selected by pressing the CHAN-

NEL keys (▲,▼).

4. Selection sequences for the
PAL/SECAM B/G, L systems:

down or up key:
AGC>VCO>LCO>SBT>SCT>SCR>RG>GG>
BG>TCT>SC>PSL>PVS>PVA>PHS

5. For an NTSC tape or NTSC A/V input:

(use down or up keys):

AGC>VCO>SBT>SCT>SCR>STT>RG>GG>B
G> SC>NSL>NVS>NVA>NHS

6. The VOLUME keys increase or decrease the
adjustment values, (stored in the
non-volatile memory when Adjustment Mode
is cancelled).

INITIAL DATA

43

6
6
6

9
38
32
33
11
28
30
43
33
29
30
39
46

RANGE
0 ~ 63 STEP
0 ~ 13 STEP
0 ~ 13 STEP
0 ~ 13 STEP
0 ~ 13 STEP
0 ~ 63 STEP
0 ~ 63 STEP
0 ~ 63 STEP
0 ~ 38 STEP
0 ~ 63 STEP
0 ~ 63 STEP
0 ~ 63 STEP
0 ~ 63 STEP
0 ~ 63 STEP

0 ~ 63STEP
0 ~ 63 STEP
0 ~ 63 STEP

OSD ABBREVIATION

AGC

SBT
SCT

SCR

STT

RC
GC

BC
TCT
PSL
PVS

PVA
PHS
NSL

NVS
NVA
NHS

FUNCTION
AUTO GAIN CONTROL
SUB BRIGHT
SUB CONTRAST
SUB COLOR
SUB TINT
RED CUTOFF
GREEN CUTOFF
BLUE CUTOFF
TELETEXT CONTRAST
PAL VERTICAL SLOPE
PAL VERTICAL SHIFT
PAL VERTICAL AMPLITUDE
PAL HORIZONTAL SHIFT
NTSC VERTICAL SLOPE
NTSC VERTICAL SHIFT
NTSC VERTICAL AMPLITUDE
NTSC HORIZONTAL SHIFT

Table 5-1 Main Adjustment Parameters (Sony µ-com) with TTX

5-2-2 Main Adjustment Parameters

NOTE : PVS, PVA, PHS, NVS, NVA,NHS parameters must be aligned using

both the 50 Hz and 60 Hz vertical-field rates.

5-2-3 AGING Mode (Reference Only)

This pattern is used for pre-heating the CRT during manufacturing--it is accessed in the
factory by twice pressing the "HIDDEN" key .

Even if the TV power is cut off, the Aging Mode is not cancelled, The patterns are displayed
at 5 sec intervals. The AGING mode is cancelled by repressing the "HIDDEN" key.

Alignment and Adjustments (Electrical)

5-2 Samsung Electronics

5-2-4 Option

BIT

7
6
5
4
3
2
1
0

ITEM
TTX
TTX SYSTEM
CONTRAST
TUNER QUANTITY
TUNER KINDS
SYSTEM (L)
SYSTEM (D/K)
SYSTEM (I)

0
NO TTX
LIST FIRST
90
1
2889

1
TTX
FLOF FIRST
100
2
0889

REMARK

1. After an option is modified, the system must be reset in order for the change to take effect.

2. Bit 6 : TTX System. This bit reverts to its initial value during Power ON.

3. Bit 5 : After a "Factory Reset", the Contrast Option determines the contrast level during Memory Mode.

4. Bit 3 : Tuner Options:

TECC2889PA19C

40.00~171.75 MHz (E2~S10)

171.75~467.25 MHz (E5~S41)

467.25~ (E21~ )

TECC0889PA19C

40.00~150.75 MHz (E2~S7)

150.75~467.25 MHz (S8~S41)

467.25~900.00 MHz (E21~ )

TUNER
BAND
VHF-L
VHF-H
UHF

5. Bits 2,1,0 :

COLOR SYSTEM

AUTO, PAL, SECAM
AUTO, PAL
AUTO, PAL, SECAM
AUTO, PAL, SECAM
PAL/SECAM, FRANCE ®Ë
AUTO, PAL
AUTO PAL

SOUND SYSTEM

X
X
AUTO, B/G, D/K
AUTO, B/G, D/K, I
X
X
X

AREA

WEST, SCAN
UNITED KINGDOM ®
EAST,CIS
CHINA, HONG KONG
FRANCE
ITALY
OCEANIA

#2
(L)

0
0
0
0
1
1
1
1

#1

(D/K)

0
0
1
1
0
0
1
1

#0

(I)

0
1
0
1
0
1
0
1

NOT USED (DEFAULT OPERATION = WEST, SCAN)

Note 1: United Kingdom: 468 - 900MHz (UHF only)

Others: 40 - 900 MHz

Note 2: Color decoder mode is always "auto"

MODULATION STANDARD

NEGATIVE
POSITIVE

COLOUR DECODER MODE

AUTO
AUTO

SYSTEM

PAL/SECAM
FRANCE

Alignment and Adjustments (Electrical)

Samsung Electronics 5-3

Alignment and Adjustments (Electrical)

5-4 Samsung Electronics

BIT

7
6
5
4
3
2
1
0

ITEM
NOT USED
NOT USED
POWER ON AFT
PDC
VPS

3.58 X-TAL
VIDEO PLUS
SHOWVIEW

0

ONCE
NO
NO
NO
NO
NO

1

TWICE
YES
YES
YES
YES
YES

REMARK

Notes:
Bit 5 : Power On AFT: When this bit=1, the AFT will re-start automatically (unless a key is pressed

within 5 seconds of power ON).

Bits 4, 3 : VPS and VDC cannot exist simultaneously. (The same appliese for VIDEO PLUS and

SHOWVIEW)

BIT

7
6
5
4
3
2
1
0

ITEM
NOT USED
NOT USED
NOT USED
HEAD
SP/LP
SECAM
MESECAM
NTSC3.58

0

2-HEAD
SP ONLY
N/A
N/A
N/A

1

4-HEAD
SP/LP
POSSIBLE
POSSIBLE
POSSIBLE

REMARK

The Reset Mode is used during factory inspection.
Function Reset : After Factory Reset, the following items revert to their initial values.

1. Volume  0

2. Channel 0

3. P-STD MEMORY

4. Contrast-tint MEMORY

5. Auto Power OFF

6. NR OFF

7. Reserved Timer Recording ALL CLEAR

8. Skip (Store/Clear) ALL CLEAR

Caution : When the EEPROM is replaced, all items revert to their initial values.

5-2-5 Option 2

5-2-6 VCR Option

5-3 Reset

Alignment and Adjustments (Electrical)

Samsung Electronics 5-5

5-4 Other Adjustments

5-4-1 General

1. Usually, a color TV needs only slight
touch-up adjustment upon installation.

Check the basic characteristics such as height,
horizontal and vertical sync and focus.

2. The picture should have good black and white

details. There should be no objectionable
color shading; if color shading is present,
perform the purity and convergence adjust­ments described below.

3. Use the specified test equipment or its

equivalent.

4. Correct impedance matching is essential.

5. Avoid overload. Excessive signal from a sweep

generator might overload the front-end of the
TV. When inserting signal markers, do not
allow the marker generator to distort test
results.

6. Connect the TV only to an AC power source

with voltage and frequency as specified on the
backcover nameplate.

7. Do not attempt to connect or disconnect any

wires while the TV is turned on. Make sure
that the power cord is disconnected before
replacing any parts.

8. To protect against shock hazard, use an
isolation transformer.

5-4-2 Automatic Degaussing

A degaussing coil is mounted around the
picture tube, so that external degaussing after
moving the TV should be unnecessary. But
the receiver must be properly degaussed upon
installation.

The degaussing coil operates for about 1
second after the power is switched ON. If the
set has been moved or turned in a different
direction, disconnect its AC power for at least
10 minutes.

If the chassis or parts of the cabinet become
magnetized, poor color purity will result. If
this happens, use an external degaussing coil.
Slowly move the degaussing coil around the
faceplate of the picture tube and the sides and
front of the receiver. Slowly withdraw the coil
to a distance of about 6 feet before removing
power.

5-4-3 High Voltage Check

CAUTION: There is no high voltage
adjustment on this chassis. The B+ power
supply must be set to +125 volts (Full color
bar input and normal picture level).

1. Connect a digital voltmeter to the second
anode of the picture tube.

2. Turn on the TV. Set the Brightness and
Contrast controls to minimum (zero beam
current).

3. The high voltage should not exceed 27.5KV.

4. Adjust the Brightness and contrast controls to
both extremes. Ensure that the high voltage
does not exceed 27.5KV under any conditions.

5-4-4 FOCUS Adjustment

1. Input a black and white signal.

2. Adjust the tuning control for the clearest picture.

3. Adjust the FOCUS control for well defined scanning lines in the center area of the screen.

5-4-5 Screen Adjustment

1. Turn to the ACTIVE channel.

2. Adjust the VR screen for a normal picture is (no blooming or flyback line).

3. Adjust the FOCUS control for well defined scanning lines in the center area of the screen.

5-4-6 Purity Adjustment

1. Warm up the receiver for at least 20 minutes.

2. Plug in the CRT deflection yoke and tighten the clamp screw.

3. Plug the convergence yoke into the CRT and set in as shown in Fig. 5-1.

4. Input a black and white signal.

5. Fully demagnetize the receive by applying an external degaussing coil.

6. Turn the CONTRAST and BRIGHTNESS controls to maximum.

7. Loosen the clamp screw holding the yoke. Slide the yoke backward or forward to provide
vertical green belt. (Fig. 5-2).

8. Tighten the convergence yoke.

9. Slowly move the deflection yoke forward, and adjust for the best overall green screen.

10. Temporarily tighten the deflection yoke.

11. Produce blue and red rasters by adjusting the low-light controls. Check for good purity
in each field.

12. Tighten the deflection yoke.

Alignment and Adjustments (Electrical)

5-6 Samsung Electronics

5-4-7 White Balance Adjustment

5-4-7 (A) HIGH-LIGHT ADJUSTMENT

1. Input either a Lion Head or a Òpure whiteÓ pattern.

2. Warm up the TV for 30 minutes.

3. Check the data in the Service Mode

4. Adjust RG, BG in the Factory Mode.

5-4-7 (B) LOW-LIGHT ADJUSTMENT

1. Automatically accomplished during the high-light adjustment.

Alignment and Adjustments (Electrical)

Samsung Electronics 5-7

4 Pole Magnet

6 Pole Magnet

2 Pole Magnet

Clamper

Screw

2 POLE
PURITY

YOKE
CLAMP
SCREW

6 POLE

CONVERGENCE
4 POLE
CONVERGENCE

ADJUST
(VERTIC

Fig. 5 -1 Convergence Magnet Assembly

Fig. 5-2 Center Convergence Adjustment

Vertical Green Belt

31m/m

Alignment and Adjustments (Electrical)

5-8 Samsung Electronics

5-4-8 Center Convergence Adjustment

1. Warm up the receiver for at least 20 minutes.

2. Adjust the two tabs of the 4 pole magnets to
change the angle between them. Superimpose
the red and blue vertical lines in the center
area of the screen.

3. Adjust the Brightness and Contrast controls for
a well defined picture.

4. Adjust the two-tab pairs of the 4 pole magnets,
and change the angle between them.
Superimpose the red and the blue vertical
lines in the center area of the screen.

5. Turn the both tabs at the same time, keeping
the angle constant, and superimpose the red
and blue horizontal line in the center of the
screen.

6. Adjust the two-tab pairs of the 6-pole magnets
to superimpose the red and blue line onto the
green. (Changing the angle affects the vertical
lines, and rotating both magnets affects the
horizontal lines.)

7. Repeat adjustments 2~6, if necessary.

8. Since the 4-pole magnets and 6-pole magnets
interact, the dot movement is complex
(Fig. 5-3).

5-4-9 VCO Adjustment

1. Apply an IF input (38.9MHz) signal.

2. In Factory Mode, adjust the AFC with the
VCO tuning bits (AFA, AFB).

The VCO is correct when the AFA Bit is
ÒINSIDE WINDOWÓ.

(The AFB Bit is above~below). The AFC out-

put is available on the I2C-BUS (used for VCO
Adjustment and feedback).

5-4-10 LCO Adjustment

1. Apply an IF input (33.9) MHz signal.

2. Set the system to FRANCE.

3. In Factory Mode, adjust the AFC with the
LCO tuning bits (AFA, AFB).

The LCO is correct when the AFA Bit is

ÒINSIDE WINDOWÓ(The AFB Bit is
above~below). The AFC output is available
on the I2C-BUS (used for LCO Adjustment
and feedback).

5-4-11 RF AGC Adjustment

1. Input a UHF High channel
(80dB, 479.25 MHz).

2. Set the AGC in the Factory mode.

3. Set Pin 53 of IC201 (TDA8374) to

3.6V + 0.05V (DC).

RED

BLUE

BLUE

RED

4-Pole Magnet Movement

GREEN

RED/BLUE

RED/BLUE

GREEN

6-Pole Magnet Movement

Fig 5-3 Center Convergence Adjustment

_

Alignment and Adjustments (Electrical)

Samsung Electronics 5-9

5-4-12 Dual Tuner AFT Adjustment (France)

1. Store 63.75 MHz in P00 (France System).

2. Store 48.25 MHz in P01 (PAL/SEC System).

3. Connect DC Voltmeter to AFT terminal of 2-tuner IF-module.

4. After selecting P00, input to TU002 IF1 (34.3 MHz).

5. After selecting P00, set to 3V (using

MT01).

6. After selecting P01, input to TU002 IF1 (38.9 MHz).

7. After selecting P01, set to 3V (

using MT02).

8. After reselecting P00, connect 34.3 MHz signal to

TU002

IF1, and then check the voltage of AFT (3V + 0.05V).

If

the

adjustment

voltage is out of specification, redo

4~7.

Test Equipment

1. TV Generator (PM5518,PM5418,ETC.)

2. DC VOLTMETER

_

1. Store 471.25

MHz

in P00.

2. Connect DC Voltmeter

to AFT terminal of TUNER IF-MODULE.

After

selecting P00, input to IF1 terminal of TU002 (38.9

MHz)

4. After selecting P00, set to 3V (

using

MT01).

3.

5-4-13 Dual Tuner AFT Adjustment (PAL/SECAM B/G,I,D/K,)

Alignment and Adjustments (Electrical)

5-10 Samsung Electronics

5-5 Electrical Adjustment (VCR Section)

5-5-1 Preparation

Electrical adjustments are required after replacing
circuit components and certain mechanical parts.
It is important to perform these adjustment only
after all repairs and replacements have been com
pleted. Also, do not attempt these adjustments
unless the proper equipment is available.

5-5-2 Required Test Equipment

1. Color Television or Monitor

2. Oscilloscope : Wide-band, dual-trace, trig­gered delayed sweep.

3. DC Voltmeter

4. TV CH Generator

5. Attenuator

6. Recording tape. (Blank tape)

7. Pattern Generator : PAL color bar. 100%
White.

Fig. 5-4 Alignment Tape

0.3V

Burst Signal

(as fiat as possible)

White (100%) signal

White (75%)
signal

0.3V

0.7V

Horizontal sync signal

Fig. 5-5 Color bar signal of pattern generator

Yellow

Cyan

Green

Magenta

Red

Blue

Bronw

Yellow

Cyan

Green

Magenta

White (75%)

Red

Blue

Deep

Blue

White
100%

Black

Color bar signal waveform

Color bar pattern

0.3V

Burst

White (100%)

White (75%)

Horizontal sync signal

0.3V

0.7V

1V

Fig. 5-6 Color bar signal of alignment tape (75% Color Bars)

Alignment and Adjustments (Electrical)

Samsung Electronics 5-11

5-5-3 Timing Chart of Program S/W

S/W A

(IC601-75)

S/W B

(IC601-74)

END

-SENSOR

(IC601-76)

START

-SENSOR

(IC601-77)

EJECT

CASS IN

UNLOAD RPS

R.SLW

STILL PB STOP F/R

E/S

L

H

-

-

-

-

-

-

-

S/S

L

L H

-

-

-

-

-

-

-

S/W A

L
L
L

L H

H
H L
L H

H
H L

S/W B

L
L

L H

H

H L

L
L

L H

H

POSITION

EJECT

CASS IN

UNLOAD

R.PS

R.SLOW

STILL
PLAY
STOP

FF/REW

ACTION MODE

EJECT
CASS IN
UNLOAD
R.PS, Z-R.PS
PINCH ROLLER OFF POSITION
STILL, SLOW, F-ADV
PB,T-STOP,REC, PAUSE, F.PS, Z-FPS
STOP, POWER OFF
FF, REW

PROGRAM S/W (SW601)

5-6 Module Deck Adjustment Process

5-6-1 H'D S/W Point Adjustment:

1. Load alignment tape (PAL signal, SPC-SD).

2. Connect oscilloscope, CH-1 to TP201 (H'D
S/W pulse), & CH-2 to TP302 (Video out)

3. Adjust VR201 (H'D S/W pulse) so that the
waveform looks like the one shown below:

6.5 0.5H

+

_

VIDEO

OUTPUT

SWITCHING POINT

SW30Hz
PULSE

V.SYNC

CH-2

CH-1

Alignment and Adjustments (Electrical)

5-12 Samsung Electronics

OPTION TABLE (for PAL)

N

O

LOCA-NO CODE NO

Descri

ption

Spec.

MODEL

Remark

340FK/

SEF-S

340WK/

BWX-S

340WKD/

SEF-S

340WKD/

EGC-S

320FK/

SEF-S

320XK/

SEG-S

320IK/UK

-S

320WK/

BWX-S

320WKD/

BWX-S

320WKD/

EGC-S

1 M/DECK ASSY

AA94-800

03J

AA94-8000

3Q

AA94-800

03S

AA94-800

03U

AA94-800

03K

AA94-800

03M

AA94-800

03N

AA94-800

03P

AA94-800

03R

AA94-800

03T

2 DECK ASSY

AA91-401

00A

AA91-401

00A

AA91-401

03A

AA91-401

03A

AA91-400

99A

AA91-400

99A

AA91-401

01A

AA91-400

99A

AA91-401

02A

AA91-401

02A

3 DRUM ASSY

AC96- 10

475F

AC96- 10

475F

AC96-104

75G

AC96- 10

475G

AC96- 10

475D

AC96- 10

475D

AC96- 10

480F

AC96- 10

475D

AC96- 10

475E

AC96- 10

475E

4

PCB ASSY

AA96-800

02P

AA96-800

02V

AA96-800

02V

AA96-800

02X

AA96-800

02Q

AA96-800

02S

AA96-800

02T

AA96-800

02U

AA96-800

02U

AA96-800

02W

5 - AA41-10886A PCB 330*245 O O O O O O O O O O Basic

6 ICM401

1201-001114 IC LA7416 O O O O X X X X X X 4H'D

1201-001115 IC LA7411 X X X X O O O O O O 2H'D

7 RM401 2001-000302 R 10 O O O O X X X X X X 4H'D

8 RM404 2001-000522 R 22K O O O O X X X X X X 4H'D

9 RM405

2001-000258 R 1.8K O O O O X X O X X X

4H'D

2H'D LP

2001-000241 R 1.5K X X X X O O X O O O 2H'D

10 RM408

2001-000005 R 390 X X X X O O O O O O 2H'D

3812-000219 JUMPER O O O O X X X X X X 4H'D

11 RM409

2001-000005 R 390 X X X X O O O O O O 2H'D

3812-000219 JUMPER O O O O X X X X X X 4H'D

12 CM406 2202-000127 C 103 O O O O X X X X X X 4H'D

13 CM407 2202-000127 C 103 O O O O X X X X X X 4H'D

14 CM408 2202-000127 C 103 O O O O X X X X X X 4H'D

15 CM413 2202-000127 C 103 O O O O X X X X X X 4H'D

16 CM420 2202-000127 C 103 O O O O X X X X X X 4H'D

17 CM429 2202-000205 C 220 O O O O X X X X X X 4H'D

5-6-2 OPTION TABLE M/DECK (FOR PAL)

Alignment and Adjustments (Electrical)

Samsung Electronics 5-13

5-6-2 OPTION TABLE (Continued)

N

O

LOCA-NO CODE NO

Descrip

tion

Spec.

MODEL

Remark

340FK/

SEF-S

340WK/

BWX-C

340WKD/

SEF-C

340WKD/

EGC-C

320FK/

SEF-S

320XK/

SEG-C

320IK/UK

-C

320WK/

BWX-C

320WKD/

BWX-C

320WKD/

EGC-C

18 CM430 2202-000205 C 220 O O O O X X X X X X 4H'D

19 JPM301 3812-000219 JUMPER X X X X O O O O O O 2H'D

20 JPM402 3812-000219 JUMPER X X X X O O O O O O 2H'D

21 DM401 0401-000005 D 1N4148 O O O O X X X X X X 4H'D

22 RM345 2001-000554 R 270 X X X X X X O X X X 2H'D LP

23 QM311 0504-000119 TR R1004 X X X X X X O X X X 2H'D LP

24 JM178 3812-000219 JUMPER O O O O X X X X X X 4H'D

25 JM119 3812-000219 JUMPER O O O O X X X X X X 4H'D

26 JM120 3812-000219 JUMPER O O O O X X X X X X 4H'D

27 RM339 2001-000429 R 1K O O O O O O X O O O MESECAM

28 RM340 2001-000449 R 2.2K O O O O O O X O O O MESECAM

29 CM371 2202-000127 C 103 O O O O O O X O O O MESECAM

30 JM060 3802-000219 JUMPER O O O O O O X O O O MESECAM

31 JM138 3802-000219 JUMPER O O O O O O X O O O MESECAM

32 JM140 3802-000219 JUMPER O O O O O O X O O O MESECAM

33 JM198 3802-000219 JUMPER X O O O X O O O O O

NON-

SECAM

34

SECAM

BLOCK

O X X X O X X X X X

35 DM617 0401-000005 D 1N4148 O O O O X X O X X X LP

36 DM630 0401-000005 D 1N4148 X O O O X X X O O O NT3.58

37 DM632 0401-000005 D 1N4148 O X X X O X X X X X SECAM

38 DM704 0401-000005 D 1N4148 O O O O X X X X X X 4H'D

39 DM703 0401-000005 D 1N4148 X X X X X X O X X X for IK

40 DM705 0401-000005 D 1N4148 O O O O O O O O O O PAL

41 JM400 3812-000219 JUMPER X X X X O O O O O O 2H'D

Alignment and Adjustments (Electrical)

5-14 Samsung Electronics

5-6-2 OPTION TABLE (Continued)

NO

LOCA-

NO

CODE NO

Descrip

tion

Spec.

MODEL

Remark

340FK/

SEF-S

340WK/

BWX-C

340WKD/

SEF-C

340WKD/

EGC-C

320FK/

SEF-S

320XK/

SEG-C

320IK/UK

-C

320WK/

BWX-C

320WKD/

BWX-C

320WKD/

EGC-C

42 JM401 3812-000219 JUMPER O O O O X X X X X X 4H'D

43 JM404 3812-000219 JUMPER O X X X O X X X X X SECAM

44 JM405 3812-000219 JUMPER O O O O O O X O O O MESECA

45 JM406 3812-000219 JUMPER O X X X O O O X X X NT PB

46 JM407 3812-000219 JUMPER X O O O X X X O O O NT3.58

47 JM409 3812-000219 JUMPER X X X X X X O X X X LP HEAD

48 CM668 2401-002259 C 0.1F X X X O X X X X X O

BACK-UP

49 RM662 2001-000458 R 2.2 1/8 X X X O X X X X X O

BACK-UP

50 RM699 2001-000004 R 200K X X X O X X X X X O

BACK-UP

51 JPM302 3812-000219 JUMPER O O O O O O O O O O PAL

52 JPM304 3812-000219 JUMPER O O O O O O O O O O PAL

53 DM618 0401-000005 D 1N4148

A/V 1 CHIP IC is used

for
PAL(only).

Multi IC is commonly used.

54 DM702 0401-000005 D 1N4148

BI NOR specification

applies to models (for South America).

Specifications of M-320FK/SEF-C are as follows.

ASSY M/DECK :A A 94-80003L,DECK ASSY:AA91-40099A,PCB ASSY:AA96-80002Q

Specifications of OPTION are identical with ones o f 320FK/SEF-S.

ASSY M/DECK M/DECK Name PCB ASSY FULL DECK ASSY Specification Destination Remark

AA94-80003J M-340FK/SEF-S AA96-80002P AA91-40100A PAL /MESECA M/SECAM/NT PB ON PAL TV BASIC France PAL Areas

AA94-80003K M-320FK/SEF-S AA 96-80002Q A A 91-40099A PAL/MESECAM/SECAM/NT PB ON PAL TV BASIC France

AA94-80003L M-320FK/SEF-C AA 96-80002Q AA91-40099A PAL /MESECA M/SECAM/NT PB ON PAL TV -

AA94-8000M M-320XK/SEG-S AA96-80002S AA91-40099A PAL/MESECAM/NT PB ON PAL TV Australia/Europe

AA94-80003N M-320IK/UK-S AA96-80002T AA91-40101A PAL/NT PB ON PAL TV(Only for LP HEAD) United Kingdom

AA94-80003P M-320WK/BWX-S AA96-80002U A A 91-40099A PAL/MESECAM/NT3.58

Russia,Middle East

AA94-80003Q M-340WK/BWX-S AA96-80002V AA91-40100A PAL/MESECAM/NT3.58

Russia,Middle East

AA94-80003R M-320WKD/BWX-S AA96-80002U A A91-40102A PAL/MESECAM/NT3.58,DIAMOND DRUM

Russia,Middle East

D DRUM

AA94-80003S M-340WKD/BWX-S AA96-80002V AA91-40103A PAL/MESECAM/NT3.58,DIAMOND DRUM

Russia,Middle East

D DRUM

AA94-80003T M-320WKD/EGC-S A A 96-80002W AA91-40102A PAL/MESECAM/NT3.58 (BACK-UP)

Libya

D DRUM

AA94-80003U M-340WKD/EGC-S AA96-80002X A A 91-40103A PAL/MESECAM/NT3.58 (BACK-UP)

Libya

D DRUM

Alignment and Adjustments (Electrical)

Samsung Electronics 5-15

5-6-2 OPTION TABLE (Continued)

NO LOCA-NO CODE NO Description Spec. Remark

1 3812-000219 JUMP WIRE add
2 JM109 3812-000219 JUMP " "
3 JM113 3812-000219 JUMP " "
4 3812-000219 JUMP " "
5 JM115 3812-000219 JUMP " "
6 JM116 3812-000219 JUMP " "
7 JM111 3812-000219 JUMP " "
8 JM089 3812-000219 JUMP " "

9 QM901 0501-000303 TR A733 "
10 QM902 0501-000303 TR A733 "
11 QM903 0501-000142 TR R2001 "
12 QM904 0501-000303 TR A733 "
13 QM905 0501-000398 TR C945 "
14 CM901 2202-000195 C 221 "
15 CM902 2401-000620 C 2.2uF/50V "
16 CM903 2202-000127 C 103 "
17 CM904 2202-000127 C 103 "
18 CM905 2202-000109 C 104 "
19 CM906 2202-000154 C 151 "
20 CM907 2401-001496 C 47/16 "
21 CM908 2202-000109 C 104 "
22 CM909 2202-000127 C 103 "
23 CM910 2202-000127 C 103 "
24 CM911 2202-000127 C 103 "
25 CM912 2202-000127 C 103 "
26 CM913 2401-001333 C 0.47/50 "
27 CM914 2202-000796 C 102 "
28 CM915 2401-000455 C 10/35 "
29 CM916 2202-000109 C 104 "
30 CM917 2202-000127 C 103 "

SECAM BLOCK LIST

Alignment and Adjustments (Electrical)

5-16 Samsung Electronics

5-6-2 OPTION TABLE (Continued)

NO LOCA-NO CODE NO Description Spec. Remark

31 CM920 2202-000199 C 223 add
32 CM921 2401-000594 C 1/50 "
33 CM922 2202-000127 C 103 "
34 CM923 2202-002036 C 510 "
35 CM925 2202-000143 C 100 "
36 CM926 2202-000830 C 820 "
37 CM927 2202-000825 C 681 "
38 CM928 2202-000210 C 271 "
39 CM930 2202-000127 C 103 "
40 DM901 0401-000005 C 1N4148 "
41 ICM901 12 04-001058 IC LA7337 "
42 LM902 27 01-000208 COIL 6.8uH "
43 LM903 27 01-000162 COIL 27uH "
44 LM904 27 01-000191 COIL 47uH "
45 LM905 27 01-000158 COIL 22uH "
46 RM902 2001-000977 R 8.2K "
47 RM903 2004-001995 R 9.1K "
48 RM904 2001-000563 R 27K "
49 RM905 2001-000786 R 47K "
50 RM906 2001-000429 R 1K "
51 RM907 2001-000890 R 6.8K "
52 RM908 2001-000613 R 3.9K "
53 RM909 2001-000660 R 33K "
54 RM910 2001-000660 R 33K "
55 RM911 2001-000837 R 51K "
56 RM912 2001-000734 R 4.7K "
57 RM913 2001-000633 R 30K "
58 RM915 2001-000890 R 6.8K "
59 RM916 2001-000472 R 2.7K "
60 RM917 2001-000522 R 22K "
61 RM918 2001-000429 R 1K "
62 RM919 2001-000605 R 3.6K "

Alignment and Adjustments (Electrical)

Samsung Electronics 5-17

5-6-2 OPTION TABLE (Continued)

NO LOCA-NO CODE NO

Description

Spec. Remark

63 RM920 2001-000761 R 430

"

64 RM921 2004-001996 R 910

add

65 RM922 2001-000429 R 1K "
66 RM923 2001-000539 R 24K "
67 RM924 2001-000319 R 120K "
68 RM925 2001-000258 R 1.8K "
69 RM926 2001-000539 R 24K "
70 RM927 2001-000947 R 7.5K "
71 JPM303 3 812-000219 JUMPER "
72 JM024 3812-000219 JUMPER "
73 JM028 3812-000219 JUMPER "
74 JM035 3812-000219 JUMPER "
75 QM630 0504-000144 TR R2002 "
76 QM631 0504-000119 TR R2001 "