Samsung TI21B4DF4X, TW14N64X, TW14N64XBWT, TW21B4D4X, TW21B4D4XBWT Service Manual

Television Video Cassette Recorder

Chassis : C17A (TS-10 )
Model : TI21B4DF4X/XEU

TW14N54X/BWT
TW14N64X/BWT
TW21B4D4X/BWT
TX14P1DF4X/XEC

Television Video Cassette Recorder CONTENTS

Precautions

Specifications

Disassembly and Reassembly

Alignment and Adjustment

Troubleshooting

Exploded View and Parts List

Electrical Parts List

Block Diagram

Wiring Diagram

Schematic Diagrams

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

Samsung Electronics 2-1

2. Specifications

The descriptions and characteristics given in this booklet are given for information purposes only and
are subject to modification without notice.

TELEVISION PART

Colour systems PAL(option) / SECAM(option) (UK;PAL)
TV standards L/L’(option), B/G(option), D/K(option) (UK;I)
Number of channels 100 programmes
Reception range/cable TV Hyperband/interband tuner
Aerial input 75 Ohms, coaxial cable

VCR PART

Format VHS standard

(PAL / SECAM(option) / MESECAM(option) / NTSC in playback only)

Heads Video: 2 rotary heads, LP(option), 4 Heads(option)

Audio/Control: 1 stationary head (linear)
Erase: 1 full track erase head
System Video Normal CCIR

System Audio Mono / NICAM&A2-STEREO
Luminance FM azimuth recording
Colour Down converted subcarrier phase shifted direct recording
FF/REW time Less than 100 seconds in FF with E-120
Wow and flutter (WTD) 0.4% maximum (SP)
Frequency response 100 Hz - 8 KHz

GENERAL

Power supply 220-240V~, 50Hz (110-260V~, 50/60Hz; option),(160-300V~50/60Hz;Russia)
Consumption 14”15” (50W)

20”/21” (60W)
Audio output power 14”15” (2W)

20” (2W)

21” (1.0Watts x 2)
Number of loudspeakers 14”/15”/20” (1)

21” (2)
Tube size 14” (37cm/34cmV)

15” (39cm/36cmV)

20” (51cm/48cmV)

21” (55cm/51cmV)
Tube type BLACK MATRIX
Sockets 1 full RGB SCART on the rear

1 RCA input (audio and video) on the front

Earphones output (3.5 mm mini-jack)

1 aerial/cable TV coaxial input
Dimensions (W x D x H) 14” (368 x 390 x 381)

15” (411 x 401 x 417)

20” (486 x 473 x 485)

21” (520 x 495 x 508)
Weight 14” (11.1 kg)

15” (14.8 kg)

20” (19 kg)

21” (23.4 kg)
Operating temperature 5°C - 40°C (41°F - 104°F)
Relative humidity 10% - 75%

Samsung Electronics

3-1

Œ

´

ˇ

¨

ˆ

Ø

Fig. 3-1 Top parts Location-1

ΠGEAR FL CAM
´ MOTOR LOADING ASS’Y
ˇ LEVER FL ARM ASS’Y
¨ HOLDER FL CASSETTE ASS’Y
ˆ LEVER FL DOOR
Ø SLIDER FL DRIVE

3. Disassembly and Reassembly

3-1 Deck Parts Locations

3-1-1 Top View

3-2

Samsung Electronics

Disassembly and Reassembly

Œ

´ ˇ ¨

ˆ

Ø

∏”’ Ô ˝ 

Ò

”

Fig. 3-2 Top Parts Location-2

ΠFE HEAD
´ CYLINDER ASS’Y
ˇ ACE HEAD ASS’Y
¨ LEVER UNIT PINCH ASS’Y
ˆ LEVER #9 GUIDE ASS’Y
Ø LEVER TENSION ASS’Y
∏ BAND BRAKE ASS’Y

” DISK S REEL
’ LEVER S BRAKE ASS’Y
˝ GEAR IDLE
Ô LEVER IDLE
 LEVER T BRAKE ASS’Y
Ò DISK T REEL

Disassembly and Reassembly

Samsung Electronics

3-3

3-1-2 Bottom View

Œ

´ˇ

¨

ˆ

Ø

∏

”

’

˝

Fig. 3-3 Bottom Parts Location

ΠGEAR JOINT 1
´ GEAR JOINT 2
ˇ BRACKET 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

3-4

Samsung Electronics

Disassembly and Reassembly

3-2-1 Lever FL Door Removal

1) Push the Holder FL Cassette Ass'y Πabout 20mm
in the direction of arrow “A”.

2) Rotate the Lever FL Door ´ in the direction of
arrow “B”.

3) Release the Hook ˇ and Remove the Lever FL
Door ´ in the direction of arrow “C”.

"B"

"C"

"A"

´ LEVER FL DOOR

ˇ HOOK

ΠHOLDER FL CASSETTE ASS'Y

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

1) Pull the Holder FL Cassette Ass'y Πto the eject
position.

2) Pull the Holder FL Cassette Ass'y Πas grasping
the Holder FL Cassette Ass'y Πand Lever FL
Cassette-R ´ in the same time to release hooking

from Main Base until the Boss [A] of Holder FL
Cassette Ass'y Πis taken out from the Rail [B].

3) Lift the Holder FL Cassette Ass'y Œ, in this time,
you have to grasp the Lever FL Cassette-R ´

Continuously until the Holder FL Cassette Ass'y
Πis taken out completely.

Note : Be sure to insert Lever FL Cassette-R ´ in the
direction of “A” to prevent separation and breakage

of the Lever FL Cassette-R ´ at disassembling and
reassembling.

ΠHOLDER FL

CASSETTEE ASS`Y

BOSS [A]

RAIL [B]

´ LEVER FL CASSETTEE -R

"A"

3-2 Main Deck

Fig. 3-4 Lever FL Door Removal

Fig. 3-5 Holder FL Cassette Ass’y Removal

Disassembly and Reassembly

Samsung Electronics

3-5

3-2-4 Lever FL Arm Ass’y Removal

1) Push the hole “A” in the direction of arrow “B”
use the pin.(about Dia. 2.5)

2) Pull out the Lever FL Arm Ass'y Πfrom the Boss
of Main Base.

3) Remove the Lever FL Arm Ass'y Πin the direction
of arrow “C”.

ΠGEAR FL CAM

GEAR WORM WHEEL

POST

TIMING POINT

Fig. 3-7 Gear FL Cam, Gear Worm

3-2-3 Slider FL Drive, Gear FL Cam 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. 3-6)

3) Remove the Gear FL cam ´.

Note : When reinstalling be sure to reassemble Slider
FL drive Πafter you insert the Boss of Lever FL
ARM-R in Groove of Slider Fl drive Œ.

Assembly : Align the Gear FL Cam Πwith the Gear
worm wheel Post as shown drawing.
(Refer to Timing point)

ΠSLIDER FL DRIVE

´ GEAR FL CAM

Fig. 3-6 Slider FL Drive Removal

ΠLEVER FL ARM ASS`Y

"C"

"B"

PIN

HOLE "A"

Fig. 3-8 Lever FL Arm Ass’y Removal

3-6

Samsung Electronics

Disassembly and Reassembly

3-2-5 Gear Worm Wheel Removal

1) Remove the Gear Worm wheel Œ.

ΠGEAR WORM WHEEL

Fig. 3-9 Gear Worm Wheel Removal

3-2-6 Motor Loading Ass’y Removal

1) Remove the screw Œ.

2) Remove the Motor Loading Ass’y ´.

´ MOTOR LOADING ASS`Y

ΠSCREW

Fig. 3-10 Motor Loading Ass’y Removal

Disassembly and Reassembly

Samsung Electronics

3-7

3-2-7 Bracket Gear, Gear Joint 2, 1 Removal

1) Remove the SCREW Œ.

2) Remove the Bracket Gear ´.

3) Remove the Gear Joint 2 ˇ.

4) Remove the Gear Joint 1 ¨.

Assembly :

1) Be sure to align dot mark of Gear Joint 1

Œ

with

dot mark of Gear Joint 2 ´ as shown Fig 3-12.
(Refer to Timing point1)

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

ΠSCREW

´ BRAKET GEAR

¨ GEAR JOINT 1

ˇ GEAR JOINT 2

3-2-8 Gear Loading Drive, Slider Cam,

Lever Load S, T Ass’y Removal

1) Remove the Belt Pulley. (Refer to Fig. 3-30)

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 Load ˇ, Link Load ˆ & Lever
Load ¨, Link Load Ø.

ΠGEAR LOADING DRIVE

ˆ LINK LOAD S

ˇ LEVER LOAD S

¨ LEVER LOAD T

Ø LINK LOAD T

´ SLIDE CAM

HOOK(A)

Fig. 3-11 Bracket Gear, Gear Joint 1,2 Removal

ΠGEAR JOINT1

´ GEAR JOINT2

ˇ SLIDER CAM

TIMING POINT 1

TIMING POINT 2

Fig. 3-12 Gear Joint 1,2 Assembly

Fig. 3-13 Gear Loading Drive, Slider Cam,

Lever T, S Load Ass’y Removal

3-8

Samsung Electronics

Disassembly and Reassembly

3-2-9 Gear Loading Drive, Slider Cam,

Lever Load S, T Ass’y Assembly

1) When reinstalling, be sure to align dot of Lever
Load T Ass'y

Œ

with dot of Lever Load S Ass'y ´

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 Load T Πand dot of
Gear Loading Drive ¨, (Refer to Timing Point 2).

4) Aline dot of Gear Loading drive ¨ with mark of
Slider Cam ˇ as shown in drawing(Refer to

Timing Point 3).

´ LEVER LOAD S

Œ

LEVER LOAD T

LEVER LOAD S

LEVER LOAD T

PIN A

PIN C

PIN B

PIN D

ˇ SLIDER CAM

TIMING POINT 2

TIMING POINT 1

TIMING POINT 3

3-2-10 Lever Pinch Drive,

Lever Tension Drive Removal

1) Remove the Lever Pinch Drive Œ, Lever Tension
Drive ´.

ΠLEVER PINCH DRIVE

´ LEVER TENSION DRIVE

Fig. 3-14 Gear Loading Drive, Slider Cam,

Lever Load S, T Ass’y Assembly

Fig. 3-15 Lever Pinch Drive,

Lever Tension Drive Removal

Disassembly and Reassembly

Samsung Electronics

3-9

3-2-11 Lever Tension Ass’y,

Band Brake Ass’y Removal

1) Remove the Lever Brake S Ass'y (Refer to Fig 3-17).

2) Remove the Spring Tension Lever Œ.

3) Rotate stopper of Main Base in the direction of
arrow “A”.

4) Lift the Lever Tension Ass'y ´ & Band brake
Ass'y ˇ.

Note :

1) When replacing the Lever Tension Ass'y ´, be sure
to apply Grease on the post,

2) Take care not to touch stain on the felt side, and not
to be folder and broken Band brake Ass'y

3) After Lever Tension Ass'y seated, Rotate stopper of
Main Base to the Mark[B].

ΠSPRING TENTION LEVER

STOPPER

MARK[B]

"A"

´ LEVER TENTION ASS`Y

ˇ BAND BRAKE ASS`Y

3-2

-12 Lever Brake S, T Ass’y

Removal

1) Release the Hook [A] and the Hook [B], [C] in the
direction of arrow as shown in Fig 3-17.

2) Lift the Lever S, T Brake Ass'y Œ, ´ with spring
brake ˇ.

Assembly :

1)Assembly the Lever S Brake Ass'y Πon the Main

Base.

2)Assembly the Lever T Brake Ass'y ´ with spring

brake ˇ.

Note : Take extreme care not to be folded and
transformed Spring Brake at removing or reinstalling.

ΠLEVER S BRAKE ASS`Y

´ LEVER T BRAKE ASS`Y

ˇ SPRING BRAKE

HOOK(B)

HOOK(C)

HOOK(A)

Fig. 3-16 Lever Tension Ass’y,

Band Brake Ass’y Removal

Fig. 3-17 Lever Brake S, T Ass’y Removal

3-10

Samsung Electronics

Disassembly and Reassembly

ΠDISK S REEL

´ DISK T REEL

Fig. 3-19 Disk S, T Reel Removal

3-2-13 Gear Idle Ass’y Removal

1) Push the Lever Idle Πin the direction of arrow
“A”, “B”.

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.

3-2-14 Disk S, T Reel Removal

1) Lift the Disk S, T Reel Œ, ´.

´ GEAR IDLE

´ GEAR IDLE

ΠLEVER IDLE

"A"

HOOK "C"

"B"

Fig. 3-18 Gear Idle Ass’y Removal

Disassembly and Reassembly

Samsung Electronics

3-11

3-2-15 Holder Clutch Ass’y Removal

1) Remove the Washer Slit Œ.

2) Lift the Holder Clutch Ass’y ´.

Note : When you reinstall Holder Clutch Ass'y

1) Check the condition of spring as shown in detail A.

2) Don't push Holder Clutch Ass'y down with exces­sive force Just insert Holder Clutch Ass'y into post
center with dead force and Rotate it smoothly.
Be sure to confirm that spring is in the slit of Gear
Center Ass'y as shown in detail B.

ΠWASHER SLIT

´ HOLDER CLUTCH ASS`Y

<BAD>

<GOOD>

<BAD>

<GOOD>

SPRING

SPRING

DETAIL A

DETAIL B

Fig. 3-20 Holder Clutch Ass’y Removal

3-2-16 Lever Up Down Ass’y, Gear Center

Ass’y Removal

1)

Remove the 2 hooks in the direction of arrow as
shown Fig. 3-21 and lift the Lever Up Down Ass’y

Œ.

2) Lift the Gear Center Ass’y ´.

Assembly :

1) Insert the Lever Up Down Ass'y Œ in the rectan­gular holes on Main Base as shown in Fig 3-22.

2) Lift the Lever Up Down Ass'y Œ about 35°.
(Refer to Fig 3-22)

3) Insert Ring of the Gear Center Ass'y ´ in the
Guide of the Lever Up Down Ass'y Œ.

4) Insert the Gear Center Ass'y ´ in the post on
Main Base.

5) Push down the Lever Up Down Ass'y Πfor
locking of the Hook.

Note :

1) Take care not to separate and sentence does not
mark sense.

2) Be sure to confirm that Ring of the Gear Center
Ass'y ´ is in the Guide of the Lever Up Down
Ass'y Πafter finishing assembly of Lever Up
Down Ass'y Œ and Gear Center Ass'y ´.

ΠLEVER UP DOWN ASS`Y

´ GEAR CENTER ASS`Y

MAIN BASE

LEVER UP DOWN ASS'Y

GUIDE

GEAR CENTER ASS'Y

RING

GEAR
POST

HOOK

35

Fig. 3-21 Lever Up Down Ass’y Removal

Fig. 3-22 Lever Up Down Ass’y Removal

3-12

Samsung Electronics

Disassembly and Reassembly

ΠGUIDE CASSETTE DOOR

HOOK [A]

3-2-18 Lever Unit Pinch Ass’y, Plate Joint,

Spring Pinch Drive Removal

1) Lift the Unit Pinch Ass’y 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.

ˇ SPRING PINCH DRIVE

ΠLEVER UNIT PINCH ASS`Y

´ PLATE JOINT

Fig. 3-23 Guide Cassette Door Removal

Fig. 3-24 Lever Unit Pinch Ass’y, Plate Joint,

Spring Pinch Drive Removal

3-2-17 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
sure the Hook [A].

Disassembly and Reassembly

Samsung Electronics

3-13

3-2-19 Lever #9 Guide Ass’y Removal

1) Remove the Spring #9 Guide Œ.

2) Lift the Spring #9 Guide Ass’y ´ in the direction
of arrow “A”.

Note :

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

2) After reinstalling, check the bottom side of the Post
#9 Guide to the top side of Main Base.

ΠSPRING #9 GUIDE

´ LEVER #9 GUIDE ASS`Y

"A"

"B"

Fig. 3-25 Lever #9 Guide Ass’y Removal

3-2-20 FE Head Removal

1) Remove the screw Œ.

2) Lift the FE Head ´.

ΠFE HEAD

Fig. 3-26 FE Head Removal

3-14

Samsung Electronics

Disassembly and Reassembly

3-2-21 ACE Head Removal

1) Pull out the FPC from connector of ACE Head
Ass’y ´.

2) Remove the screw Œ.

3) Lift the ACE Head Ass’y ´.

ΠSCREW

´ HEAD ACE ASS`Y

3-2-22 Slider S, T Ass’y Removal

1) Move the Slider S, T Ass’y Œ, ´ to slot, and then
lift it to remove. (Refer to arrow)

ΠSLIDER S ASS`Y

´ SLIDER T ASS`Y

Fig. 3-27 ACE Head Removal

Fig. 3-28 Slider S, T Ass’y Removal

Disassembly and Reassembly

Samsung Electronics

3-15

3-2-23

Plate Ground Deck, Cylinder Ass’y Removal

1) Remove the 3 Screws Œ.

2) Lift the Plate Ground Deck ´.

3) Lift the Cylinder Ass’y ˇ.

Assembly :

1) Match the 3 holes in the bottom of Cylinder ass'y
ˇ to the 3 holes of Main Base as attending not to
drop or knock the Cylinder ass'y ˇ.

2) Tighten the 1 Screw Œ.

3) Match the Plate Ground Deck ´ to the Hole of
Base Main.

4) Tighten the other 2 Screws Œ.

Note :

1) Take care not to touch the Cylinder Ass'y ˇ and
the tape guide post at reinstalling.

2) When reinstalling, Don't push down too much on
Screw Driver.

Π3 SCREWS

´ PLATE GROUND DECK

ˇ CYLINDER ASS'Y

Fig. 3-29 Plate Ground Deck, Cylinder Ass’y Removal

3-2-24 Belt Pulley Removal

1) Remove the Belt Pulley Œ.

Note : Take extreme care not to get grease on Belt
Pulley Πat assembling or reassembling.

ΠBELT PULLEY

Fig. 3-30 Belt Pulley Removal

3-2-25 Level Head Cleaner Ass’y Removal

(Optional)

1) Release the Hook Œ.

2) Lift the Lever Head Cleaner Ass’y

´.

ΠHOOK

´ LEVER HEAD CLEANER ASS'Y

SLEEVE-HEAD CLEANER

Fig. 3-31 Level Head Cleaner Ass’y Removal

3-16

Samsung Electronics

Disassembly and Reassembly

3-2-26 Damper Capstan, Motor Capstan Ass’y

Removal

1) Remove the Damper Capstan Πin the direction
of arrow.

2) Remove the 3 Screws ´.

3) Remove the Motor Capstan Ass’y ˇ.

Assembly :

1) Match the 3 holes of Motor Capstan Ass’y ˇ to the
3 holes of Main Base. Be careful not to drop or

knock the Motor Capstan Ass'y ˇ.

2) Tighten the 3 Screws ´ in the direction of arrow
as shown detail drawing.

3) Assemble the Damper Capstan Œ.

Note : 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.
After reinstalling, adjusting the tape transport
system again.

B

C

A

´ 3 SCREWS

ΠDAMPER CAPSTAN

ˇ MOTOR CAPSTAN ASS'Y

3-2-27 How to Eject the Cassette Tape
(If the unit does not operate on condition that is
inserted into housing ass’y)

1) Turn the Gear worm Πclockwise with screw
driver.(Refer to arrow)
(Other method : Remove the Screw of Motor Load
Ass'y, Separate the Motor Load Ass'y)

ΠGEAR WORM

Fig. 3-32 Damper Capstan,Motor Capstan Ass’y Removal

Fig. 3-33 How to Eject the Cassette Tape

2) When Slider S,T are approched in the position of
unloading, rotate holder Clutch counterclockwise
after inserting screw driver in the hole of frame's
bottom in order to wind the unwinded tape.
(Refer to Fig.3-34)

(If you rotate Gear Worm Πcontinuously when
tape is in state of unwinding, you may cause a
tape contamination by grease and tape damage.
Be sure to wind the unwinded tape in the state of
set horizently.)

3) Rotate Gear Worm Πclockwise using screw driver
again up to the state of eject mode and then pick
out the tape.(Refer to Fig.3-33)

FRAME

Fig. 3-34

Disassembly and Reassembly

Samsung Electronics

3-17

3-3 The table of clearing, Lubrication and replacement time about principal parts

1) The replacement time of parts is not life of parts.

2) The table 1-1 is that the VCR Set is in normal condition (normal temperature, normal humidity).
The checking period may be changed owing to the condition of use, runtime and environmental conditions.

3) Life of the Cylinder Ass’y is depend on the condition of use.

4) See exploded view for location of each parts.

<Table 1-1>

∆ : Cleaning O : Check and replacement in necessary : Add Oil

T

A

PE

P

A

T

H

S
Y
S
T
E

M

D
R

I

V

I
N
G

* 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 ∆∆∆ OOOO OOO

CYLINDER ASS’Y ∆ OOOOOOO OO

FE HEAD ∆∆∆ OOOO OOO

ACE HEAD ∆ OO OOOOOOO

PINCH ROLLER ∆ OO OOOOOOO

POST REEL S, T

SLEEVE TENSION

POST CENTER

LEVER IDLE BOSS (2Point)

CAPSTAN MOTOR PULLEY

∆∆∆ ∆∆ OOOOO

BELT PULLEY O O O O O O O

HOLDER CLUTCH ASS’Y

∆ OO OOOOOOO

GEAR CENTER ASS’Y OOOOOOOOO

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 OOOOOOOOO

BRAKE T ASS’Y OOOOOOOOO

S
Y
S
T
E

M

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

- The excessive applying oil may be
the cause of
malfunction.

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

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

- We recommend to use oil [EP-50]
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

3-18

Samsung Electronics

Disassembly and Reassembly

Fig. 3-4-1 Location of Tape Transport Adjustment

Fig. 3-4-2 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

3-4 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.

Disassembly and Reassembly

Samsung Electronics

3-19

3-5-1(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. 3-5-1 and 3-5-2)

Fig. 3-5-1 Location of ACE Head Adjustment Screw

Fig. 3-5-2 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

3-5-1(b) ACE HEAD TILT ADJUSTMENT

1) Playback a blank 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. 3-5-3 (B).

3) If a curl or wrinkle of the tape occurs, slightly

turn

the screw (A) tilt adjust on the ACE head ass’y.

4) Reconfirm the ACE head height.

Fig. 3-5-3 Tape Guide Check

3-5-1(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. 3-5-1)

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

ADJUSTMENT

1) See “2. Alignment and Adjustment” for ACE Head
position (X-Point) adjustment.

(A) (B)

(BAD)

WRINKLE

(GOOD)

3-5 Tape Transport System Adjustment

When parts are replaced, perform the required
adjustments by referring to procedures 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 “2. Alignment and Adjustment” of the

Service Manual for Test Point Locations.)

3-5-1 ACE Head Assembly Adjustment

3-20

Samsung Electronics

Disassembly and Reassembly

3-5-2 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 its
minimum) meets the specification shown in

Fig. 3-5-4.
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 Ain Fig. 3-5-5 does not meet the
speci-fication, adjust the guide roller S up or
down.

5) If the section B in Fig. 3-5-5 does not meet the

speci-fication, adjust the guide roller T up or down.

Fig. 3-5-4 Envelope Waveform Adjustment

a

a b c d
c,b,d/a

63%

b

c

d

Fig. 3-5-5 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 H’D 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. 3-8.

Fig. 3-5-6 Guide Roller S, T Height Adjustment

IDEAL ENVELOPE

S HEIGHT TOO HIGH

S HEIGHT TOO LOW

T HEIGHT TOO HIGH

T HEIGHT TOO LOW

GUIDE ROLLER S

GUIDE ROLLER T

Disassembly and Reassembly

Samsung Electronics

3-21

3-5-3 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. 3-5-7).
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. 3-5-7 Video Envelope Rising when Operation mode Changes

from RPS to Play Mode

3-5-4 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. 3-5-8.

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. 3-5-8.
In SP mode, (A) should equal (B).
If the head gap is wide, upper cylinder should be
checked.

A

B

Fig. 3-5-8 Envelope Output and Output Level

3-5-5 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 :

Tape wrinkle at the guide roller S, T section :
Linearity adjustment.

Tape wrinkle at tape guide flange :
ACE head assembly coarse adjustment.

3-6 Reel Torque

1) The rotation of the capstan motor causes the
Holder Clutch Ass’y to rotate through the Belt
Pulley.

2) The spring wrap PLAY/REV of holder clutch ass’y
drives the disk reel S, T through gear idle by rota­tion of gear center ass’y.

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

4) Transportation of accurate driving force is done by
gears. (Gear Center Ass’y)

Note : If the spec. does not meet the followings speci­fications, replace the holder clutch ass’y and then
recheck.

MODE TORQUE g/cm GAUGE

PB 42 ± 11

Cassette Torquemeter

RPS 145 ± 30

Cassette Torquemeter

<Table 2-1>

4-2 Factory (“Service”) Mode

Alignment and Adjustments (Electrical)

Samsung Electronics 4-1

4. Alignment and Adjustments (Electrical)

4-1 Preadjustment

4-1-1 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 “Adjustment” screen
of the Factory Mode menu. This screen is
intended only for factory use.

4-1-2 When EEPROM (IC902S) 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.

4-1-3 When CRT Is Replaced

Make the following adjustments after setting up

purity and convergence:

White Balance
Sub-Brightness
Vertical Center
Vertical Size
Horizontal Size

4-2-1 Procedure for the “Adjustment” Mode

1. This mode uses the standard remote control.
The Service Mode is activated by: (1) pressing
the “FACTORY” 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 “SERVICE (FACTORY)” message will be
displayed. The Service Mode has three compo­nents: Adjustment, Option and Reset.

3. Access the Adjustment Mode by pressing the
“VOLUME” keys ( Up or Down). The adjust­ment parameters are listed in the accompany­ing table, and selected by pressing the CHAN­NEL keys (▲,▼).

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

down or up key:
AGC>TXP>AFW>SBT>SCT>SCR>STT>RG>
GG>BG>TCT>SC>SL>PVS>PHS>NVS>
NHS>CDL>BKS

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

Alignment and Adjustments (Electrical)

4-2 Samsung Electronics

4-2-2 Main Adjustment Parameters

OSD ABBREVIATION

AGC

XP

QSS

SBT

SCT

SCR

STT

RG

GG

BG

TCT

SC

SL

VA

PVS

PHS

NVS

NHS

CDL

SCL

PWL

OMD

BLR

BLB

AGC2T

PF

RP

YD

RANGE

63

7

1

23

23

13

13

63

63

63

1

63

63

63

63

63

63

63

15

3

15

63

63

63

31

3

3

15

INITIAL DATA

28

5

1

6

10

6

9

38

32

32

0

11

30

38

27

40

38

22

4

1

12

26

31

27

15

2

2

5

NOTE : PVS, PVA, PHS, NVS, NVA,NHS parameters must be aligned using both the 50 Hz and 60 Hz

vertical-field rates.

4-2-3 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 AGINGmode is cancelled by repressing the "FACTORY" key.

Alignment and Adjustments (Electrical)

Samsung Electronics 4-3

BYTE

1

2

3

4

5

6

7

8

9

ITEM

LANGUAGE

SYSTEM

TUNER

HELP MESSAGE

VCR HEAD

G-CODE

ATS OPTION

VPS/PDC

TTX

0

EUROPE/URSSIA

CF/CI/CW/CX/CB/CII

1/2

ON/OFF

2HD/2HDLP/4HD/HIFI

SHOWVIEW/VIDEO PLUS/NONE

ON/OFF

PDC/VPS/NONE

ON/OFF

4-3 Reset

BYTE

1

2

3

4

5

6

7

8

9

ITEM

Contrast

Bright

Sharpness

Color

Tint

Volume

Program Number

Color System

Sound System

3DB LNA

Panel Lock

Language

Clock

Timer

On Time

Sleep

PICTURE MODE

0

4-2-4 Option

Alignment and Adjustments (Electrical)

4-4 Samsung Electronics

4-4 Other Adjustments

4-4-1 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.

4-4-2 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.

4-4-3 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.

Alignment and Adjustments (Electrical)

Samsung Electronics 4-5

4-4-4 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.

4-4-5 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.

4-4-6 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. 4-1.

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. 4-2).

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)

4-6 Samsung Electronics

4-4-7 White Balance Adjustment

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

1. Input either a Lion Head or a “pure white” 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.

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

1. Automatically accomplished during the high-light adjustment.

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

A

31m/m

Vertical Green Belt

Fig. 4 -1 Convergence Magnet Assembly

Fig.4-2 Center Convergence Adjustment

Alignment and Adjustments (Electrical)

Samsung Electronics 4-7

4-4-8 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. 4-3).

RED

BLUE

BLUE

RED

4-Pole Magnet Movement

GREEN

RED/BLUE

RED/BLUE

GREEN

6-Pole Magnet Movement

Fig 4-3 Center Convergence Adjustment

4-4-9 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.

2. After selecting P00, input to IF1 terminal of TU002(38.9 MHz Using PM5518)

3. After selecting P00, set to 2.5V±0.2V(Using FRANCE : T101, PAL/SCAM B/G,I,D/K : L102)