Samsung TB-14C52S, TB-20C5DF2S, TB-20C52S, TB-21B5DF2S, TB20C5DT2S-XEC Alignment and Adjustments

Samsung Electronics 4-1

4-1 Deck Parts Locations

4-1-1 Deck (Top View)

Œ

´

ˇ

¨

ˆ

Ø

∏

Fig. 4-1 Top parts Location-1

4. Alignments and Adjustments (Mechanical)

ΠBRACKET FL TOP
´ GEAR FL CAM
ˇ MOTOR LOADING ASS’Y
¨ LEVER FL ARM ASS’Y
ˆ HOLDER FL CASSETTE ASS’Y
Ø LEVER FL DOOR
∏ SLIDER FL DRIVE

4-1-2 Deck (Top View)

Alignments and Adjustments (Mechanical)

4-2

Samsung Electronics

Œ

´ˇ

¨

ˆ

Ø

∏

”

’

˝

Ô

Ò

ÚÆı

Ò

Fig. 4-2 Top Parts Location-2

ΠFE HEAD
´ PLATE CYLINDER C
ˇ CYLINDER ASS’Y
¨ PLATE CYLINDER B
ˆ PLATE CYLINDER A
Ø ACE HEAD ASS’Y
∏ UNIT PINCH ASS’Y
” LEVER #9 GUIDE ASS’Y
’ LEVER TENSION ASS’Y

˝ BAND BRAKE ASS’Y
Ô DISK S REEL
 LEVER S BRAKE ASS’Y
Ò GEAR IDLE
Ú LEVER IDLE
Æ LEVER T BRAKE ASS’Y
ı DISK T REEL

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-3

4-1-3 Deck (Bottom View)

Œ

´

ˇ

¨

ˆØ∏

”

’˝

Ô

Fig. 4-3 Bottom Parts Location

ΠGEAR JOINT 1
´ GEAR JOINT 2
ˇ BRAKET GEAR
¨ MOTOR CAPSTAN ASS’Y
ˆ LEVER T LOAD ASS’Y
Ø GEAR LOADING DRIVE
∏ LEVER S LOAD ASS’Y

” HOLDER CLUTCH ASS’Y
’ BELT PULLEY
˝ SLIDER CAM
Ô SLEEVE TENSION

Alignments and Adjustments (Mechanical)

4-4

Samsung Electronics

4-2 Main Deck

4-2-1 Braket FL Top Removal

1. Remove 2 screws Œ.

2. Remove the Bracket FL Top ´.

Note : Take care not to change assembly direction.

FIG.1

Π2 SCREWS

´ BRACKET FL TOP

4-2-2 Lever FL Door Removal

1. Rotate the Lever FL Door Πin the direction of

arrow ÒAÓ.

2. Release the Hook ´, remove the Lever FL Door

Œ in the direction of arrow ÒBÓ.

´ HOOK

ΠLEVER FL DOOR

"A"

"B"

Fig. 4-4 Braket FL Top Removal

Fig. 4-5 Lever FL Door Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-5

4-2-3 Holder FL Cassette Ass’y Removal

1. Remove the Lever FL Door. (Refer to Fig. 4-5

2. Pull the Holder FL Cassette AssÕy Œ to the eject

position.

3. Pull the Holder FL Cassette AssÕy Œ as grasping
the Holder FL Cassette AssÕy Œ and Lever FL
Cassette-R ´ in the same time to release hooking

from Main Base until the Boss [A], [B] of Holder
FL Cassette AssÕy Œ is taken out from the Rail [C],

[D].

4. Lift the Holder FL Cassette AssÕy Œ in the direc­tion of arrow ÒBÓ in this time, you have to grasp

the Lever FL Cassette-R ´ continuously until the
Holder FL Cassette AssÕy Œ is taken out completely.

Note : Be sure to insert Lever FL Cassette-R ´ in the

direction of ÒAÓ to prevent separation and break­age of the Lever FL Cassette-R ´ at disassembling

and reassembling.

ΠHOLDER FL
CASSETTE ASS'Y

´ LEVER FL CASSETTE-R

BOSS [A]

BOSS [B]

RAIL [C]

RAIL [D]

"A"

"B"

4-2-4 Lever FL Arm Ass’y Removal

1. Remove the Lever FL Door. (Refer to Fig. 4-5

2. Remove the Holder FL Cassette AssÕy.
(Refer to Fig.4-6)

3. Release the Hook Πin the direction of arreow

ÒAÓ, pull out the Lever FL Arm AssÕy ¨ from

the Boss of Main Base.

4. Remove the Lever FL Arm AssÕy ¨ in the direc­tion of arrow ÒBÓ.

Assembly : When reinstalling, be sure to reassemble

Lever FL Arm AssÕy ¨ after you insert the Boss

´ in Groove [A] of Slider FL Drive ˇ.

ΠHOOK

´ BOSS

¨ LEVER FL

ARM ASS'Y

ˇ SLIDER FL DRIVE

GROOVE [A]

"A"

"B"

Fig. 4-6 Holder FL Cassette Ass’y Removal

Fig. 4-7 Lever FL Arm Ass’y Removal

Alignments and Adjustments (Mechanical)

4-6

Samsung Electronics

4-2-5 Slider FL Drive Removal

1. Pull the Slider FL Drive Πto the front direction.

2. Remove the Slider FL Drive Πin the direction of arrow. (Refer to Fig. 4-8)

ΠSLIDER FL DRIVE

4-2-6 Bracket Gear, Gear FL Cam, Gear Joint 1, 2 Removal

1. Remove screw Œ.

2. Lift the Bracket Gear ´.

3. Remove the Gear FL Cam ˇ.

4. Lift the Gear Joint 2 ¨, Gear Joint 1 ˆ.

ΠSCREW

´ BRACKET GEAR

ˇ GEAR FL CAM

ˆ GEAR JOINT 1

¨ GEAR JOINT 2

Fig. 4-8 Slider FL Drive Removal

Fig. 1-9 Bracket Gear, Gear FL Cam, Gear Joint 1, 2 Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-7

4-2-7 Assembly of Gear FL Cam,

Gear Joint 1, 2

1. Be sure to align dot mark of Gear Joint 1 Πwith
dot mark of Gear Joint 2 ´ as shown Fig. 4-10

(Refer to Timing Point 1), confirm the Timing

Point 2 of the Gear Joint 2 ´ and Slider Cam ˇ.

2. Align the Gear FL Cam ¨ with the Gear Worm

Wheel Post as shown detail drawing. (Refer to

Timing Point 3)

ΠGEAR JOINT 1

´ GEAR JOINT 2

ˇ SLIDER CAM

TIMING POINT 1

¨ GEAR FL CAM

GEAR WORM WHEEL

POST

TIMING POINT 2

TIMING POINT 3

4-2-8 Holder Worm, Gear Worm,

Gear Worm Wheel Removal

1. Release the Hook [A] in the direction of arrow

and, remove the Holder Worm Œ.

2. Remove the Gear Worm ´.

3. Remove the Gear Worm Wheel ˇ. (After remov-

ing the Gear FL Cam as shown Fig. 4-9)

Note : Secure the Hook [A] after installing the

Holder Worm Œ.

ΠHOLDER WORM

´ GEAR WORM

HOOK [A]

ˇ GEAR WORM WHEEL

Fig. 4-10 Assembly of Gear FL Cam, Gear Joint 1,2

Fig. 4-11 Holder Worm, Gear Worm, Gear Worm Wheelemoval

Alignments and Adjustments (Mechanical)

4-8

Samsung Electronics

4-2-9 Motor Loading Ass’y Removal

1. Remove the screw Œ.

2. Remove the Motor Loading AssÕy ´.

ΠSCREW

´ MOTOR LOADING ASS'Y

Fig. 4-12 Motor Loading Ass’y Removal

4-2-10 Gear Loading Drive, Slider Cam, Lever T, S Load Ass’y Removal

1. Remove the Belt Pulley. (Refer to Fig. 4-29)

2.Remove the Gear Loading Drive Πafter releasing

Hook [A] in the direction arrow as shown in detail

drawing.

3. Remove the Slider Cam ´.

4. Remove the Lever T, S Load AssÕy ˇ, ¨.

ΠGEAR LOADING DRIVE

ˇ

LEVER T LOAD ASS'Y

HOOK [A]

´ SLIDER CAM

¨

LEVER S LOAD ASS'Y

Fig. 4-13 Gear Loading Drive, Slider Cam, Lever T, S Load Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-9

4-2-11 Assembly of Gear Loading Drive,

Slider Cam, Lever T, S Load Ass’y

1. When reinstalling, be sure to align dot of Lever T
Load AssÕy Œ with dot of Lever S Load AssÕy ´
as shown in drawing. (Refer to Timing Point 1

2. Insert the Pin A, B, C, D into the Slider Cam

ˇhole.

3. Be sure to align dot of Lever T Load AssÕy and dot

of Gear Loading Drive ¨. (Refer to Timing Point 2)

4. Align dot of Gear Loading Drive with mark of
Slider Cam as shown in drawing.

(Refer to Timing Point 3)

´ LEVER S LOAD ASS'Y

ΠLEVER T LOAD ASS'Y

PIN A

PIN C

PIN B

PIN D

LEVER T
LOAD ASS'Y

LEVER S
LOAD ASS'Y

ˇ SLIDER CAM

¨ GEAR LOADING DRIVE

TIMING POINT 1

TIMING POINT 2
TIMING POINT 3

4-2

-12 Lever Tension Ass’y, Band Brake
Ass’y,

Sleeve Tension Removal

1.Remove the Spring Tension Œ.
2

.

In bottom side of Deck, remove the Sleeve
Tension ´ after rotating it right or left as lif-

tinig locking edge of Sleeve Tension.

3

.

Remove the side ÒaÓ of the Band Brake

AssÕy ¨ in the direction of arrow ÒAÓ from
the Lever Tension AssÕy ˇ.

4

.

Remove the side ÒbÓ of the Band Brake

AssÕy ¨ in the direction of arrow ÒBÓ from
the Main Base.

Note :
1

.

When replacing the Lever Tension AssÕy, be

sure to apply oil in the Sleeve Tension.

2

.

Take care not to touch stain on the felt side,
and not to be folded and broken Band Brake

AssÕy.

¨

BAND BRAKE ASS'Y

´ SLEEVE TENSION

ˇ

LEVER TENSION ASS'Y

Œ

SPRING TENSION

"A"

"B"

a

b

Fig. 4-14 Assembly of Gear Loading Drive,

Slider Cam, Lever T, S Load Ass’y

Fig. 4-15 Lever Tension Ass’y, Band Brake Ass’y, Sleeve Tension

Removal

Alignments and Adjustments (Mechanical)

4-10

Samsung Electronics

4-2-13 Lever S, T Brake Ass’y Removal

1. Release the Hook [A] and the Hook [B], [C] in the
direction of arrow as shown in Fig. 1-16.

2. Lift the Lever S, T Brake AssÕy Œ, ´ with Spring
Brake ˇ.

Assembly :

1. Assemble the Lever S Brake AssÕy Œ on the Main
Base.

2. Assemble the Lever T Brake AssÕy ´ with Spring
Brake ˇ.

Note : Take extreme care not to folded or transform

the spring Brake while removing or reinstalling.

ˇ

SPRING BRAKE

´

LEVER T BRAKE ASS'Y

Œ

LEVER S BRAKE ASS'Y

HOOK [A]

HOOK [C]

HOOK [B]

4-2-14 Lever Idle Ass’y Removal

1. Push the Lever Idle Πin the direction of arrow

ÒAÓ, ÒBÓ.

2. Lift the Lever Idle Œ.

Assembly :

1. Apply oil in two Bosses of Lever Idle Œ.

2. Assemble the Gear Idle ´ with the Lever Idle Œ.

Note : When replacing the Gear Idle ´, be sure to

add oil in the boss of Lever Idle Œ.

ΠLEVER IDLE

´ GEAR IDLE

´ GEAR IDLE

HOOK [A]

"A"

"B"

Fig. 4-16 Lever S, T Brake Ass’y Removal

Fig. 4-17 Lever Idle Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-11

4-2-15 Disk S, T Reel Removal

1. Lift the Disk S, T Reel Œ, ´.

´ DISK T REEL

ΠDISK S REEL

Fig. 4-18 Disk S, T Reel Removal

4-2-16 Holder Clutch Ass’y Removal

1. Remove the Washer Slit Œ.

2. Lift the Holder Clutch AssÕy ´.

´ HOLDER CLUTCH ASS'Y

ΠWASHER SLIT

Fig. 4-19 Holder Clutch Ass’y Removal

Alignments and Adjustments (Mechanical)

4-12

Samsung Electronics

4-2-17 Lever Up Down Ass’y, Gear Center

Ass’y Removal

1. Remove the 2 hooks in the direction of arrow as
shown Fig. 1-20 and lift the Lever Up Down AssÕy

Œ.

2. Lift the Gear Center AssÕy ´.

´ GEAR CENTER ASS'Y

ΠLEVER UP DOWN ASS'Y

4-2-18 Assembly of Lever Up Down

Ass’y, Gear Center Ass’y

1. Insert the Lever Up Down AssÕy Œ in the 2

rectangular holes on Main Base.

2. Lift the Lever Up Down AssÕy Œ about 35

degree. (Refer to Fig. 1-21)

3. Insert Ring ¨ of the Gear Center AssÕy ´ in the
Guide ˆ of the Lever Up Down AssÕy Œ.

4. Insert the Gear Center AssÕy ´ in the post Ø on
Main Base.

5. Push down the Lever Up Down AssÕy Œ for

locking of the Hook ∏.

Note :

1. Take care not to separate and loose the Spring

Up Down.

2. When assembling the Gear Center AssÕy, donÕt
push down too much.

MAIN BASE

ΠLEVER UP DOWN ASS'Y

ˆ GUDIE

´ GEAR CENTER ASS'Y

¨ RING

ˇ GEAR
Ø POST

∏ HOOK

35˚

Fig. 4-20 Lever Up Down Ass’y, Gear Center Ass’y Removal

Fig. 4-21 Assembly of Lever Up Down Ass’y,

Gear Center Ass’y

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-13

4-2-19 Guide Cassette Door Removal

1. Lift the Hook [A].

2. Rotate the Guide Cassette Door Πin the direction

of arrow.

Note : After reinstalling the Guide Cassette Door Œ

secure the Hook [A].

ΠGUIDE CASSETTE DOOR

HOOK [A]

4-2-20 Unit Pinch Ass’y, Plate Joint,

Spring Pinch Drive Removal

1. Lift the Unit Pinch AssÕy Œ.

2. Remove the Plate Joint ´ from Lever Pinch

Drive.

3. Remove the Spring Pinch Drive ˇ.

Note :

1. Take extreme care not to touch the grease on the
Roller Pinch.

2. When reinstalling, be sure to apply grease on the

post pinch roller.

Œ

UNIT PINCH ASS'Y

´ PLATE JOINT

ˇ

SPRING PINCH DRIVE

Fig. 4-22 Guide Cassette Door Removal

Fig. 4-23 Unit Pinch Ass’y, Plate Joint, Spring Pinch Drive

Removal

Alignments and Adjustments (Mechanical)

4-14

Samsung Electronics

4-2-21 Lever #9 Guide Ass’y Removal

1. Remove the Spring #9 Guide Œ.

2. Lift the Lever #9 Guide AssÕy ´ in the direction

of arrow.

Note :

1. Take extreme care not to touch the grease on the
tape Guide Post.

2. After reinstalling, check the bottom side of the

Post #9 Guide to stick to the top side of Main
Base.

´ LEVER #9 GUIDE ASS'Y

ΠSPRING #9 GUIDE

4-2-22 FE Head Removal

1. Remove the screw Œ.

2. Lift the FE Head ´.

ΠSCREW

´ FE HEAD

Fig. 4-24 Lever #9 Guide Ass’y Removal

Fig. 4-25 FE Head Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-15

4-2-23 ACE Head Removal

1. Pull out the FPC from connector of ACE Head AssÕy ´.

2. Remove the screw Œ.

3. Lift the ACE Head AssÕy ´.

ΠSCREW

´ ACE HEAD ASS'Y

Fig. 4-26 ACE Head Removal

4-2-24 Slider S, T Ass’y Removal

1. Move the Slider S, T AssÕy Œ, ´ to slot, and then lift it to remove. (Refer to arrow)

´ SLIDER T ASS'Y

ΠSLIDER S ASS'Y

Fig. 4-27 Slider S, T Ass’y Removal

Alignments and Adjustments (Mechanical)

4-16

Samsung Electronics

4-2-25 Cylinder Ass’y Removal

1. Remove the 3 Screws Œ, ˇ, ˆ.

2. Remove the Plate Cylinder A, B, C ´, ¨, Ø in

the direction of arrow.

3. Lift the Cylinder AssÕy ∏.

Note :

1. When reinstalling, push the Plate Cylinder A, B

¨, Ø in the reverse of arrow and then, tighten the

2 Screws ˇ, ˆ.

2. Take care not to touch the Cylinder AssÕy and the
tape guide post at reinstalling Plate Cylinder C´.

3. Take care not to touch the Cylinder AssÕy with
screw driver at reinstalling the Plate Cylinder C´.

ˆ

SCREW

∏

CYLINDER ASS'Y

Œ

SCREW

´

PLATE CYLINDER C

ˇ

SCREW

¨

PLATE CYLINDER B

Ø

PLATE CYLINDER A

4-2-26 Belt Pulley Removal

1. Remove the Belt Pulley Œ.

Note : Take extreme care not to touch the grease on

Belt Pulley Πat assembling or reassembling.

ΠBELT PULLEY

Fig. 4-28 Cylinder Ass’y Removal

Fig. 1-29 Belt Pulley Removal

4-2-27 Lever Head Cleaner Ass’y Removal

(Optional)

1. Release the Hook Œ.

2. Lift the Lever Head Cleaner AssÕy

´.

ΠHOOK

´ LEVER HEAD CLEANER ASS'Y

Fig. 4-30 Lever Head Cleaner Ass’y Removal

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-17

4-2-28 Motor Capstan Ass’y Removal

1. Remove the 3 Screws Œ.

2. Remove the Motor Capstan AssÕy ´.

Assembly :

1. Match the 3 holes of Motor Capstan AssÕy ´ to

the 3 holes of Main Base as attending not to drop
or knock the Motor Capstan AssÕy.

2. Tighten the 3 Screws in the direction of arrow as

shown detail drawing.

Note :

1. DonÕt reuse the removed screws from Motor

Capstan AssÕy.

2. After tightening screws, check if there is gap

between the head of screws and the top side of
Main Base. There should have no gap between

the head of screws and the top side of Main Base.

3. After reinstalling, adjusting the tape transport
system again.

Π3 SCREWS

´

MOTOR CAPSTAN ASS'Y

B

C

A

<DETAIL>

4-2-29 How to Manually Eject the Cassette Tape

1. Remove the Holder worm Πand the Gear Worm
´.

2. Turn the Gear Worm Wheel ˇ counterclockwise

with screw driver. (Refer to arrow)

ΠHOLDER WORM

´ GEAR WORM

SCREW DRIVER

ˇ GEAR WORM WHEEL

Fig. 4-31 Motor Capstan Ass’y Removal

Fig. 4-32

3. As Sliders S and T are approched in the

unloading position, rotate holder Clutch counter­clockwise after inserting screw driver in the hole
of frameÕs bottom (in order to wind the unwinded
tape). (Refer to Fig. 4-33)

If you rotate Gear Worm Wheel continuously
when tape is unwinding, you may cause tape
contam

ination by grease and tape damage. Be

sure to wind horizontally.

4. Rotate Gear Worm Wheel ˇ counterclockwise

using screw driver, up to the state of eject mode,
and then pick out the tape.
(Refer to Fig. 4-32)

FRAME

Fig. 4-33

* Parts Name

Checking Period

Remark

500 1000 1500 2000 2500 3000 3500 4000 4500 5000

POST TENSION ∆∆∆∆∆∆∆∆∆∆

SLANT POST S, T ∆∆∆∆∆∆∆∆∆∆

#8 GUIDE SHAFT ∆∆∆∆∆∆∆∆∆∆

CAPSTAN SHAFT ∆∆∆∆∆∆∆∆∆∆

#9 GUIDE POST ∆∆∆∆∆∆∆∆∆∆
#3 GUIDE POST ∆∆∆∆∆∆∆∆∆∆

GUIDE ROLLER S, T ∆∆∆OOOOOOO

CYLINDER ASS’Y ∆ OOOOOOOOO

FE HEAD ∆∆∆OOOOOOO

ACE HEAD ∆ OOOOOOOOO

PINCH ROLLER ∆ OOOOOOOOO

POST REEL S, T 33333

SLEEVE TENSION 33333

POST CENTER 33333

LEVER IDLE BOSS (2Point)

33333

CAPSTAN MOTOR PULLEY

∆∆∆∆∆OOOOO

BELT PULLEY O O O O O O O

HOLDER CLUTCH ASS’Y

∆ OOOOOOOOO

GEAR CENTER ASS’Y O O O O O O O O O

GEAR IDLE (2Point) O O O O O O O O O

LOADING MOTOR O O O O O O O O O

BAND BRAKE ASS’Y O O O O O O O O O

BRAKE T ASS’Y O O O O O O O O O

Alignments and Adjustments (Mechanical)

4-18

Samsung Electronics

4-3 Lubrication and recommended replacement time for principal parts

1. The

recommended

replacement time is shorter than the design maximum.

2. Table 1-1 assumes VCR is in normal environment (normal temperature, normal humidity).
The checking period may be changed based on the manner of use, runtime and environmental
conditions.

3. Life of the Cylinder AssÕy depends on the manner of use.

4. See exploded view for location of each part.

<Tbale 1-1>

Æ : Cleaning O : Check and replacement in necessary 3 : Add Oil

T
A
P
E

P
A
T
H

S
Y
S
T
E

M

D
R

I

V

I
N
G

S
Y
S
T
E

M

- Periodic time of applying oil
(Apply oil after cleaning)

- The excessive applying oil
may be the cause of malfunc-

tion.

- To clean the parts, use patch
and alcohol (solvent).

- After cleaning, use the video
tape after alcohol is gone
awny completely.

- We recomnend to use oil
[EP-56] or solvent.

- One or two drops of oil
should be applied after clean­ing with alcohol.

B
R
A
K
E

S
Y
S
T
E

M

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-19

Fig. 4-4-1 Location of Tape Transport Adjustment

Fig. 4-4-2 Tape Travel Diagram

CYLINDER ASS'Y

TAKE UP REEL DISK

#8 GUIDE POST

#9 GUIDE POST

SUPPLY REEL DISK

CAPSTAN

PINCH ROLLER

GUIDE ROLLER "T"

GUIDE ROLLER "S"

FULL ERASE HEAD

#3 GUIDE POST

TENSION POST

HEIGHT SCREW

TILT SCREW

X - POSITION
ADJUST SILT

AZIMUTH SCREW

POST TENSION

MAIN BASE

FE HEAD CYLINDER ASS'Y PINCH ROLLER

GUIDE ROLLER "S" GUIDE ROLLER "T"

#8 GUIDE POST #9 GUIDE POST

CAPSTAN SHAFT

ACE HEAD

#3 GUIDE POST

4-4 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.

Alignments and Adjustments (Mechanical)

4-20

Samsung Electronics

4-5-1(a) ACE 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 (C) clockwise or counterclockwise until the gap of lower tape edge and the lower edge of
the control head is about 0.25mm.
(Refer to Fig. 4-5-1 and 4-5-2)

Fig. 4-5-1 Location of ACE Head Adjustment Screw

Fig. 4-5-2 ACE Head Height Adjustment

SCREW (A)

TLIT ADJUST

X-POSITION

ADJUSTING SLIT

SCREW (C)
HEIGHT ADJUST

SCREW (D)
X-POSITION
LOCKING

SCREW (B)

AZIMUTH ADJUST

0 ~ 0 .25 mm

AUDIO HEAD

VIDEO HEAD

CONTROL HEAD

4-5 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 tape and make sure excessive
tape wrinkle does not occur at the tape guides.

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

2. If the tape wrinkle is still observed at the tape

guide, perform the tilt adjustment of the ACE head.

(See page 5-3 of the Service Manual for Test Point Locations.)

4-5-1 ACE Head Assembly Adjustment

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-21

4-5-1(b) ACE HEAD TILT ADJUSTMENT

1. Playback a blank 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 (see figure).

3. If a curl or wrinkle of the tape occurrs,

turn screw
ÒCÓ slighty clockwise until the wrinkle disappears
(see figure).

4. Reconfirm the A/C head height.

Fig. 4-5-3 Tape Guide Check

4-5-1(c) AUDIO AZIMUTH ADJUSTMENT

1. Play backthe alignment tape (mono scope).
(NTSC : 7KHz ; PAL : 6KHz).

2. Connect channel-1 scope probe to audio out on

the Main PCB.

3. Adjust screw (B) for maximum audio level.

(See Fig. 4-5-1)

4-5-1(d) ACE HEAD POSITION (X-POINT)

ADJUSTMENT (PAL SYSTEM ONLY)

1. On the remote control, press the Ò1Ó button and
ÒInputÓ simultaneously. This will automatically
adjust the tracking center.

2. Play back the mono scope alignment tape.

3. Connect Ch1 scope probe to ÒCTRLÓ and Ch2
scope probe to ÒHÕD SWÓ. Trigger on the head­switching pulse.

4. Set the tracking preset to 7 msec, and 2HÕD to

2 msec. Use the ÒFineÓ tracking buttons ▲ / ▼

on the remote control.

5. Connect Ch1 scope probe to ÒENVÓ; connect Ch-2

to ÒHÕD SWÓ and trigger on Ch-1.

6. Insert the adjusting gear. Adjust the driver in
either direction for maximum envelope wave

form.

7. Note: Since the adjusting gear unit may be
damaged, do not adjust X-point by using force.
After turning the X-point adjusting screw (D)
slightly counterclockwise, perform the adjustment
and then tighten the screw.

(A) (B)

(BAD)

WRINKLE

(GOOD)

Fig. 4-5-4 Tracking Preset Adjustment

4H'd : 7msec
2H'd : 2mesc

CH-2 PROBE

H'D SW

PULSE

CH-1 PROBE

CTL PULSE

Setting of Scope

-Volt/div. ; CH-1 = 0.1V
CH-2 = 0.2V

-Time/div. ; 5msec

Fig. 4-5-5 Control Pulse Adjustment

CONTROL PULSE REMOVE

REMOTE

BUTTONS

PUSH

FINE

FINE

PUSH

Alignments and Adjustments (Mechanical)

4-22

Samsung Electronics

4-5-1(e) A/C HEAD POSITION (X-POINT). ADJUSTMENT (PAL SYSTEM ONLY)

1. Play back the mono scope alignment tape.

2. Connect Ch1 scope probe to ÒCTRLÓ and Ch-2 scope probe to ÒHÕD SWÓ.
Trigger on the head-switching pulse.

3. Set the tracking preset to 7 msec using the ÒFineÓ tracking buttons ▲ / ▼ on the remote control.

4. Connect Ch1 scope probe to ÒENVÓ; connect Ch-2 to ÒHÕD SWÓ and trigger on Ch-1.

5. Insert the adjusting driver (+) into the X-position adjusting gear. Adjust the driver in either direction
for maximum envelope waveform.

6. Note: Since the adjusting gear unit may be damaged, do not adjust the X-point by using force. After
turning the X-point adjusting screw (D) slightly counter-clockwise, perform the adjustment and then

tighten the screw.

Fig. 4-5-5 Tracking Preset and Control Adjustment

Only for Models. SV-20U/30U/40U/60U/100U

VR3705/VR3805/5705/5805/8705

CH-2 PROBE

H'D SW

PULSE

CH-1 PROBE

CTL PULSE

Setting of Scope

-Volt/div. ; CH-1 = 0.1V
CH-2 = 0.2V

-Time/div. ; 5msec

4H'd : 7msec
2H'd : 2mesc

Fig. 4-5-6 racking Preset and Control Adjustment

Only for Models: sv-70U/90U/120U/140U/160U

VR5805/VR5855/5905/8905

4H'd : 7msec
2H'd : 2mesc

CH-2 PROBE

H'D SW

PULSE

CH-1 PROBE

CTL PULSE

Setting of Scope

-Volt/div. ; CH-1 = 0.1V
CH-2 = 0.2V

-Time/div. ; 5msec

CONTROL PULSE ADJUSTMENT

REMOTE

BUTTONS

PUSH

TRACKING

TRACKING

PUSH

CONTROL PULSE REMOVE

REMOTE

BUTTONS

PUSH

FINE

FINE

PUSH

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-23

4-5-2 Linearity adjustment

(Guide roller S, T adjustment)

1.

Playback 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 itsminimum) meets the specification shown in

Fig. 4-5-7.
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.

4. If the section A in Fig. 4-5-8 does not meet the
specification, adjust the guide roller S up or

down.

5. If the section B in Fig. 4-5-8 does not meet the
specification, adjust the guide roller T up or

down.

Fig. 4-5-7 Envelope Waveform Adjustment

a

a b c d
c,b,d/a

63%

bcd

Fig. 4-5-8 Adjustment Points

AB

A

B

H'D SWITCHING
PULSE

ENVELOPE

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. 4-5-9.

Fig. 4-5-9 Guide Roller S, T Height Adjustment

IDEAL ENVELOPE

S HEIGHT
TOO HIGH

S HEIGHT
TOO LOW

T HEIGHT
TOO LOW

T HEIGHT
TOO HIGH

GUIDE ROLLER S

GUIDE ROLLER T

MODE TORQUE g/cm GAUGE

PB

NTSC 82.5 ± 27.5

Cassette Torquemeter

PAL 79 ±27

RPS 145 ± 30

Cassette Torquemeter

Alignments and Adjustments (Mechanical)

4-24

Samsung Electronics

4-5-3 Check Transition 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. 4-5-10).
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. 4-5-10 Video Envelope Rising when Operation mode Changes

from RPS to Play Mode

4-5-4 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. 2-10.

2. Play back a self recorded tape (recording made
onthe unit using with T-120 (E-120).

The video envelope should meet the specification
as shown in Fig. 4-5-11. In SP mode, (A) should

equal (B).

If the head gap is wide, upper cylinder should be
checked.

A

B

Fig. 4-5-11 Envelope Output and Output Level

2-2-5 Tape Wrinkle Check

1. Run the T-160 (E-180) 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 guide roller S, T section :

Linearity adjustment.

3 Tape wrinkle at tape guide flange :

ACE head assembly coarse adjustment.

4-6 Reel Torque

1. The rotation of the capstan motor causes the
Holder Clutch AssÕy to rotate through the Belt
Pulley.

2. The spring wrap PLAY/REV of holder clutch

assÕy drives the disk reel S, T through gear idle by
rotation of gear center assÕy.

3. Brake is operated by slider cam at FF/REW mode.

4. Transportation of accurate driving force is done

by gears. (Gear Center AssÕy)

Note : If the specifications are not met, replace the

holder clutch assÕy and then recheck.

<Table 4-6>

Alignments and Adjustments (Mechanical)

Samsung Electronics 4-25

4. Rotate Disk S Reel Πclockwise and do the

adjustment in the region around the Main Base
(in shape of slit). Clockwise or counterclockwise
after inserting it turn the screw driver in the slit
on the Main Base. Adjust the left end edge of

Lever Tension AssÕy ˇ to 1.3 +1.5/-0.5mm (from
the location of mark in the Main Base).

5. Rotate Disk S Reel Œ, and double-check the loca-

tion of the left end edge of Lever Tension AssÕy,

and the amount of crossing from the mark on
Main Base. (+1.0/-0.5mm)

Counterclockwise : Torque UP
Clockwise : Torque DOWN

Back Tension should be 56 ± 15g.cm (use a Back

Tension Meter).

1.0mm

0.5mm

ˇ LEVER TENSION ASS'Y

ΠDISK S REEL

´ ADJUSTING

ADJUSTING SLIT

1.3

Fig. 4-5-14 Tension Pole and Back Tension Adjustment

1. Remove the holder cassette assÕy and then push
the lever FL Arm-R to the direction of loading.

2. Push the lever tension drive Πin the direction of

arrow. (See Fig. 4-5-12)

3. Turn the gear worm wheel ´ clockwise so that

ÒTiming PointÓ of the slider FL drive ˇ and gear
FL cam ¨ can be aligned (See Fig. 4-5-13)

Fig.4-5-12

Fig. 4-5-13

¨ GEAR FL CAM

´ GEAR WORM WHEEL

ˇ SLIDER FL DRIVE

P

TIMING POINT

ΠLEVER TENSION DRIVE

LEVER TENSION

Note :

1 Mark on Main Base is located about 1.3mm

from inside of curved line.

2 Be careful not to deform the region of adjustment

around the Main Base (up or down).

4-7 Location Adjustment and Confirmation of Tension Post

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

Make the following adjustments after setting up

purity and convergence:

White Balance
Sub-Brightness
Vertical Center
Vertical Size
Horizontal Size

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 ÒFACTORYÓ service key on the local-key­board, or (2) by entering the following remote­control sequence (within 2 seconds):

STAND-BY ®DISPLAY ®MENU® MUTE®
POWER ON

2. The ÒSERVICE (FACTORY)Ó message will be

displayed. The Service Mode has three 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>AFW>SBT>SCT>SCR>RG>GG>
BG>TCT>SC>SL>VA>PVS>PHS>CDL>BKS

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

INITIAL DATA

12

6

38
32
33
04
28
30
43
33

30
01
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 ~ 07 STEP

0 ~ 63 STEP
0 ~ 01 STEP
0 ~ 63 STEP

OSD ABBREVIATION

AGC
SBT
SCT
SCR
STT

RG
GG
BG

TCT

SL
PVS
VA
PHS
CDL
NVS

BKS
NHS

FUNCTION
AUTO GAIN CONTROL
SUB BRIGHT
SUB CONTRAST
SUB COLOR
SUB TINT
RED GAIN
GREEN GAIN
BLUE GAIN
TELETEXT CONTRAST
VERTICAL SLOPE
PAL VERTICAL SHIFT
VERTICAL AMPLITUDE
PAL HORIZONTAL SHIFT
CATHOD DRIVE LEVEL
NTSC VERTICAL AMPLITUDE
BLACK STRETCHER
NTSC HORIZONTAL SHIFT

Table 5-1 Main Adjustment Parameters (Sony m-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 "FACTORY" key .

Even if the TV power is cut off, the Aging Mode is not cancelled.
The "AGING" marking is displayed on the screen.
The AGING mode is cancelled by repressing the "FACTORY" key.

14" : 06

20/21" : 10

14" : 06

20/21" : 04

9

14" : 03

20/21" : 04

AUTO FREQUENCY WINDOW

AFW

0 ~ 01 STEP

00

14/20" : 00
21" : 11

S-CORRECTION

SC

0 ~ 63 STEP

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

SYSTEM (L)
SYSTEM (D/K)
SYSTEM (I)

0
NO TTX
LIST FIRST
70
1

1
TTX
FLOF FIRST
90
2

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 : Not used.

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
SHARPNESS
PDC
VPS

3.58 X-TAL
VIDEO PLUS
SHOWVIEW

0

OFF
NO
NO
NO
NO
NO

1

ON
YES
YES
YES
YES
YES

REMARK

Notes:
Bit 5 : Sharpness ON : When this bit=1, the peaking will be activated.

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 )))) 10

2. Program Channel))) 0

3. P-STD)))) MEMORY

4. Auto Power))) OFF

5. NR)))) OFF

6. Reserved Timer Recording) ALL CLEAR

7. 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).

RED

BLUE

BLUE

RED

4-Pole Magnet Movement

GREEN

RED/BLUE

RED/BLUE

GREEN

6-Pole Magnet Movement

Fig 5-3 Center Convergence Adjustment

5-4-9 Dual Tuner AFT Adjustment

Test Equipment

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

2. DC VOLTMETER

1. Connect DC Voltmeter

to AFT terminal of TUNER IF-MODULE.

After

selecting P00, input to IF1 terminal of TU002 (38.9

MHz Using PM5518)

3. After selecting P00, set to 2.5V

+

2.

_

0.2V (Using FRANCE : T101, PAL/SCAM B/G,I,D/K : L102)

Alignment and Adjustments (Electrical)

Samsung Electronics 5-9

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)

A

0

0

0

1

1

0

0

0

1

0

B

0

0

0

0 ->1

1

1

0

0

0

1

C

0

0

0

1

0

0

1

1

0

1

S

0

1

1

1

X

X

1

X

X

X

F

0

X

X

X

X

X

X

X

X

X

Eject

Unload POWER OFF

(Tape loading start point)

(Tape loading end point)

Reverse Picture Ssarch, Reverse SLOW

Play, Rec,F-PS,Still,SLOW,F-ADV

Stop (Play position 5 Min. over)

(MAIN Break ON MODE)

High speed Rew, Low speed FF

High speed FF, Low speed Rew

STANBY

POWER OFF

LOADING START

LOADING END

REV

PLAY

STOP1

STOP 2

FF / REW 1

FF / REW 2

Alignment and Adjustments (Electrical)

5-10 Samsung Electronics

I

II

III

IV



V

VI

VII

a

b

c

d

e

f



F/R2

F/R1

SPT2SPT1

PLAY

REV

LOAD
END

LOAD
START

POWER
OFF

STANDBY

E/SEN

S/SEN

SW C

SW B

SW A

SW
POSITION

FL SW : ON-less than 3.5v / OFF-more than 3.5v (Input to A/D port)
START / END SENSOR : ON-"L", OFF-"H"

: DON'T CARE

ON

OFF

ON

OFF

5-5-3 PROGRAM SW

POSITION

PROGRAM S/W TAPE SEN

OPERATION MODE

X : DON’T CARE

Alignment and Adjustments (Electrical)

Samsung Electronics 5-11

NO

LOCA

-

NO

CODE

- NO

SPECIFICAT
ION

REMARK

M-440
WKD/
BWT-S

M-441
WKD/
BWT-S

M-420

FK/

SEF-S

M-421

FK/

SEF-S

M-422

FK/

SEF-S

M-420

XK/

SEG-S

M-421

XK/

SEG-S

M-422

XK/

SEG-S

M-420

IK/

UK-S

M-420

YK/

XEG-S

M-421

YK/

XEG-S

M-422

YK/

XEG-S

1 M/DECK ASSY

AA94-

80004R

AA94-

00193C

AA94-

80004T

AA94-

00193E

AA94­00193S

AA94­80004U

AA94-

00193F

AA94-

00193T

AA94-

80005L

AA94-

00193N

AA94-

00193Q

2 DECK ASSY

AA91-

40108A

AA91-

40108A

AA91-

40112A

AA91-

40112A

AA91­40112A

AA91­40112A

AA91-

40112A

AA91-

40112A

AA91-

40112A

AA91-

40112A

AA91-

40112A

3 DURM ASSY

4 PCB ASSY

AA95-

00091B

AA95-

00091M

AA95-

00091E

AA95-

00091Q

AA95­00091Q

AA95­00091F

AA95-

00091R

AA95-

00091R

AA95-

00091K

AA95-

00091V

AA95-

00091V

5 AA41-10983B X245 PCB O O O O O O O O O O O O O O O O

STANDA

RD

6 CM330 2401-001513 47/16V C-AL X X X X X X X X X X X X X X X X
7 CM336 2202-000127 103P C O O O O O O O O O O O O O O O O PAL
8 CM388 2202-000127 103P C X X X X X X X X X X X X X X X X MULTI
9 DM712 0401-000005 1N4148 D O O X X X X X X X X X X X X X X 4HD
10 DM713 0401-000005 1N4148 D X X O O O X X X X X X X X X X X SECAM

11 DM714 0401-000005 1N4148 D O O O O O O O O X X X X X X X X

MESECA

M

12 DM715 0401-000005 1N4148 D X X X X X X X X O O O X X X X X 2HD LP
13 DM716 0401-000005 1N4148 D X X X X X X X X X X X X X X X X MULTI
14 DM717 0401-000005 1N4148 D X X X X X X X X X X X X X X X X NT

3.58

15 ICM301

1204-001410 LA71590M

IC

O O O O O O O O O O O O O O O O PAL

1204-001403 LA71570M X X X X X X X X X X X X X X X X MULTI
16 QM303 0504-000119 R1004 TR X X X X X X X X O O O X X X X X 2HD LP
17 QM316 0501-000398 C945 TR X X X X X X X X X X X X X X X X D.REC
18 RM320 2001-000554 270 R X X X X X X X X 0 0 0 X X X X X 2HD LP
19 RM326 2001-000837 51K R X X X X X X X X X X X X X X X X D.REC
20 RM337 2001-000268 1.8K R X X X X X X X X X X X X X X X X MULTI
21 RM375 2001-000268 1.8K R X X X X X X X X X X X X X X X X PB FM
22 RM376 2001-000268 1.8K R X X O O O X X X X X X X X X X X SECAM
23 RM374 2001-000244 1.5M R X X X X X X X X X X X X X X X X
24 RM656 2001-000290 10K R X X X X X X X X X X X X X X X X CTL
25 XTM302 2801-003610 3.579545M X-TAL X X X X X X X X X X X X X X X X MULTI
26 ICM604 1203-000515 7042 IC-VOL X X X X X X X X X X X X X X X X BACK-UP
27 CM646 2401-002259 0.1F,5.5V C-AL X X X X X X X X X X X X X X X X BACK-UP
28 RM695 2001-000568 27 R X X X X X X X X X X X X X X X X BACK-UP

29

SECAM
BLOCK

- - - X X O O O X X X X X X X X X X X

SECAM

ONLY
30 CM384 2202-000830 82P C X X X X X X X X X X X X X X X X TV-V-IN
31 CM394 2202-000806 221P C X X X X X X X X X X X X X X X X A.OUT
32 CM386 2202-000127 103P C X X X X X X X X X X X X X X X X GND

33 JM225 3812-000219 JUMPER JM O O X X X O O O O O O O O O O O

WITHOUT

SECAM
34 RM379 2001-000290 10K R X X X X X X X X X X X X X X X X
35 JM177 3812-000219 JUMPER JM X X X X X X X X X X X X X X X X AU-HUM
36 CNM611 3711-000682 CONN,13P WAFER X X X X X X X X X X X X X X X X
37 CM396 2202-000127 103P C X X X X X X X X X X X X X X X X MULTI

38 ICM103 1203-000190 78L05 IC-TR X X X X X X X X X X X X X X X X

POWER

SUPPLY

M-421

IK/

UK-S

AA94-

00193H

AA94-

80004V
AA91-

40113A

AA91-

40113A

AA91-

40113A

AA95-

00091G

AA95­00091S

AA95-

00091S

AA91-

40114A

AA91-

40114A

AA95-

00091K

M-422

IK/

UK-S

AA94­00193P

M-420

YK/

SIEL-S

M-421

YK/

SIEL-S

AA94-

80004Z

AA94-

00193M

AA95-

00091V

300

DESCRIP
TION

5-6-1 TS M/DECK OPTION TABLE (PAL)

Alignment and Adjustments (Electrical)

5-12 Samsung Electronics

5-6-1 OPTION TABLE (Continued)

39 JM112 3812-000219 JUMPER JM X X X X X X X X X X X X X X X X

POWER
SUPPLY

40 JM165 3812-000219 JUMPER JM X X X X X X X X X X X X X X X X

POWER

SUPPLY
41 RM380 2001-001031 91K R O O X X X X X X X X X X X X X X 4HD
42 QM318 0504-000119 R1004 TR O O X X X X X X X X X X X X X X 4HD
43 JM227 3812-000219 JUMPER JM O O X X X X X X X X X X X X X X 4HD

KEY OPTION(DELETEDWHENA CONTROL ASSY IS ADDED)
44 SWM601 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
45 SWM602 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
46 SWM603 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
47 SWM604 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
48 SWM605 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
49 SWM606 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
50 SWM607 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
51 SWM608 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
52 SWM609 3404-000244 SW-TACT SW O X O X X O X X O X X O X O X X KEY
53 CM631 2202-002037 104P C O X O X X O X X O X X O X O X X KEY
54 CM632 2401-002009 100/16V C-AL O X O X X O X X O X X O X O X X KEY
55 DM607 0401-000005 1N4148 D O X O X X O X X O X X O X O X X KEY
56 DM608 0401-000005 1N4148 D O X O X X O X X O X X O X O X X KEY
57 DM609 0401-000005 1N4148 D O X O X X O X X O X X O X O X X KEY
58 ZDM601 0403-000654 MTZ12B ZENER O X O X X O X X O X X O X O X X KEY
59 LM602 AA91-60317A G-LED,03 ASSY O X O X X O X X O X X O X O X X KEY
60 CNM611 3711-000683 13P CON X O X O O X O O X O O X O X O O KEY ADD
61 QM603 0504-000118 R1003 TR O X O X X O X X O X X O X O X X KEY
62 QM604 0504-000118 R1003 TR O X O X X O X X O X X O X O X X KEY
63 QM605 0504-000118 R1003 TR O X O X X O X X O X X O X O X X KEY
64 RM631 2001-001077 150,1/2W R O X O X X O X X O X X O X O X X KEY
65 RM632 2001-001077 150,1/2W R O X O X X O X X O X X O X O X X KEY
66 RM633 2001-001077 150,1/2W R O X O X X O X X O X X O X O X X KEY
67 RM637 2001-000290 10K R O X O X X O X X O X X O X O X X KEY
68 JM114 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY
69 JM127 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY
70 JM136 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY
71 JM138 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY
72 JM147 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY
73 JM212 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY
74 JM213 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY
75 JM214 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY
76 JM215 3812-000219 JUMPER JM O X O X X O X X O X X O X O X X KEY

77 REM601 AA59-60003V

REMO-

MOD

O X O X X O X X O X X O X O X X KEY

Alignment and Adjustments (Electrical)

Samsung Electronics 5-13

5-6-2 SECAM BLOCK LIST OPTION TABLE

NO LOCA - NO CODE - NO DESCRI PT ION SP ECI FICAT ION REMARK

1

CM901 2202-000127 C-CERA 103P
2 CM902 2301-000224 C-FILM 223P
3 CM903 2201-000376 C-CERA 220P RADIAL
4 CM904 2201-000193 C-CERA 10P RADIAL
5 CM905 2201-000863 C-CERA 680P RADIAL
6 CM906 2202-000127 C-CERA 103P
7 CM907 2201-000681 C-CERA 82P RADIAL
8 CM908 2401-000426 C-AL 10uF/16V
9 CM909 2202-000796 C-CERA 102P

10 CN910 2401-001333 C-AL 0.47uF/50V
11 CM911 2202-002036 C-CERA 51P
12 CM912 2202-000127 C-CERA 103P
13 CM913 2202-002037 C-CERA 104P
14 CM914 2201-000234 C-CERA 150P RADIAL
15 CM915 2301-000383 C-FILM 103P
16 CM916 2401-002291 C-AL 47uF/16V
17 CM917 2202-002037 C-CERA 104P
18 CM918 2301-000383 C-FILM 103P
19 CM919 2301-000383 C-FILM 103P
20 CM920 2401-000665 C-AL 2.2uF/50V
21 CM921 2201-000262 C-CERA 180P RADIAL
22 CM922 2401-000590 C-AL 1uF/50v
23 CM923* 2201-000681 C-CERA 82P NOTUSED
24 CM924 2202-002037 C-CERA 104P

CM925 2202-002037 C 104P

25 DM901 0401-000005 D 1N4148
26 DM902 0401-000005 D 1N4148
27 ICM901 1204-001058 IC LA7337
28 LM901 2701-000002 COIL 100uH
29 LM902 2701-000162 COIL 27uH
30 LM903 2701-000158 COIL 22uH
31 LM904 2701-000191 COIL 47uH

Alignment and Adjustments (Electrical)

5-14 Samsung Electronics

5-6-2 SECAM BLOCK OPTION TABLE (Continued)

32 LM905 2701-000208 COIL 6.8uH
33 LM906* 2701-000158 COIL 22uH NOT USED
34

QM901 0501-000398 TR C945
35 QM902 0501-000142 TR R2001
36 QM903 0504-000119 TR R1004
37 QM904 0501-000398 TR C945
38 QM905 0501-000398 TR C945
39 QM906 0501-000303 TR A733
40 RM901 2001-000522 R 22K
41 RM902 2001-000472 R 2.7K
42 RM903 2001-000539 R 24K
43 RM904 2001-000947 R 7.5K
44 RM905 2001-000890 R 6.8K
45 RM906 2001-000387 R 51K
46 RM907 2001-000591 R 3.3K
47 RM908 2001-000633 R 30K
48 RM909 2001-000890 R 6.8K
49 RM910 2001-000429 R 1K
50 RM911 2001-000429 R 1K
51 RM912 2001-000674 R 360
52 RM913 2001-000281 R 100
53 RM914 2001-000786 R 47K
54 RM915 2001-000539 R 24K
55 RM916 2001-001015 R 9.1K
56 RM917 2001-000977 R 8.2K
57 RM918 2001-000139 R 120K
58 RM919 2001-000734 R 4.7K
59 RM920 2001-000539 R 24K
60 RM921 2001-000429 R 1K
61 RM922* 2001-000319 R 120K NOT USED
63 JM173 3812-000219 JUMPER JUMPER
64 JM174 3812-000219 JUMPER JUMPER
65 JM176 3812-000219 JUMPER JUMPER
66 JM179 3812-000219 JUMPER JUMPER
67 JM194 3812-000219 JUMPER JUMPER

NO LOCA - NO CODE - NO DESCRIPTION SP ECI FICAT ION REMARK