Samsung TXB2025, TXB2025/CX Technical Data Manual

E:fact® Technical Service Data

INDEX

Parts List

Coils & Transformers
Miscellaneous
Controls & Resistors
Capacitors & Electrolytics
Cabinet Parts
Semiconductors, 3 pages

Schematics ................... Location

Television ................. 2A, 2B

Television ................. 2C, 2D

Audio/Video Switching &

Audio Output ............2E, 2F

Closed Caption ................ 3D

Power Supply .............. 2G, 2H

System Control ............ 3A, 3B

System Control ................ 3C

Placement Chart

SAMSUNG

Models Chassis

TXB2025/CX K52MB

SCHEMATIC NOTES

For SAFETY use only equivalent replacement part,

see parts list.

Circuitry not used in some versions.

To purchase a complete paper version
of this service manual, order

®

PHOTOFACT

set #3300

To place the order, contact your local
Sams Distributor or call our Customer
Service operation at 1-800-428-7267.

Product #083300
© Copyright 1999

SAMS Technical Publishing All rights reserved.

Circuitry used in some versions.
Ground
Chassis ground
Common tie point
Taken from common tie point

3

Schematic voltage source tie point.
Cabling: Heavy lines reduce use of multiple lines.

A

Waveforms and voltages are taken from ground, unless

noted otherwise.

Waveforms taken with triggered scope and keyed rainbow

generator. Waveform voltage is peak to peak. Timebase

is per division. Waveforms shown at 10 divisions.
Supply voltages maintained as seen at input.
Voltages measured with digital meter and a 1000µV RF

signal, with colorbar pattern, applied to antenna terminal.
Controls adjusted for normal operation.
Capacitors are 50 volts or less, 5% or greater unless noted.
Electrolytic capacitors are 50 volts or less,

20% or greater unless noted.
Resistors are 1/2W or less, 5% or greater unless noted.
Value in ( ) used in some versions.
Measurements with switching as shown, unless noted.
Rated voltage shown on zener diodes.

PARTS LIST

COILS & TRANSFORMERS

Item No. Function/Rating Mfr. Part No.

D-Coil Degaussing 32479-029-060
DY Yoke 90° Horiz 2.3mH 32439-310-028

Vert 27.4mH

L101 .8µH -

1.3µH 32429-014-020
L103 68µH 32427-805-850
L104 - 32707-200-009
L201 12µH 32427-805-450
L202 10µH 32427-803-130
L203 68µH 32427-805-850
L401 Ferrite Bead34047-019-060
L402 195µ Horizontal 32449-712-010

Linearity
L601 24µH 32427-816-010
L602 - 32727-601-012
L603 - 32707-200-008
L604 68µH 32427-805-850
L702 390µH 32427-904-720
L703, 04 330µH 32427-904-710
L705 Thru
L707 75µH 32427-904-740
L801, 03 6mH Line Filter 32426-633-160
L804 500µH Line Filter 32429-633-100
L805 5.6µH 32427-805-885
L806, 07 1µH 32429-226-080
L808 Ferrite Bead34047-019-060
L809 5.6µH 32427-805-885
L810 Ferrite Bead34047-019-060
L811 24µH 32429-904-790
L813 250µH 32429-904-800
L901 47µH 32427-805-550
L902 6.1mH 32429-902-510
LH01 24µH 32427-816-010
T401 50mH Horizontal Drive 32849-020-010
T444 (1) Horizontal Output 32859-200-050
T801 SMPS 32899-002-430

(1) Focus and screen controls are part of T444.

PARTS LIST continued

MISCELLANEOUS

Item No. Description Mfr. Part No. Notes

F801 Fuse 34709-087-170 4Amp, 125VAC
JAV01 Jack - Left Audio In, Right

Audio In, Video In,
Right Audio Out, Left

Audio Out
P801 Line Cord 33053-815-411 AC, Polarized
PR01 Receiver 32199-411-050 Remote Control
RL01 Relay 34729-004-010 Degaussing
SP01, 02 Speaker 34209-200-006 8 Ohm, 8W
SW01 Switch 33606-101-012 Power
SW02 Switch 33598-001-006 Channel Up, Channel Down,

Volume Up, Volume Down.
SW03 Switch 33598-001-006 Picture Mode, Mode Up,

Mode Down, Sound Mode.
SW201 Switch 33549-007-010 Service
SW601 Switch 33526-201-001 Speaker Ext/Int
V999 CRT 32019-255-103 A51KRE83X / A54GGB98X
X401 Crystal 34539-300-005 503kHz
X501 Crystal 34537-001-002 3.58MHz
X901 Crystal 34537-001-003 4.0MHz
Z100 Filter 34529-700-023 SAW
Z201 Filter 34527-460-001 4.5MHz
Z601 Filter 34527-460-000 4.5MHz

CRT Socket 33359-063-650 ­PC Board (1) 33004-332-121 Closed Caption
PC Board (1) 33004-115-311 CRT
PC Board (1) 33004-126-471 Main
PC Board (1) 33004-125-981 Power
Terminal Board 33302-107- 610 Antenna
Transmitter 3F14-00034-630 ­Tuner (1) 34519-600-021 UHF/VHF

(1) Contact PTS Electronics Corporation for replacement; order by manufacturer's part number.

PARTS LIST continued

CONTROLS & RESISTORS

Item No. Function/Rating Mfr. Part No. NTE Part No.

R219 133K 1% 1/2W 31047-351-333 ­R250 4.7 5% 1/4W Fusible 31059-001-010 ­R301 10 5% 1/2W Fusible 31059-002-100 ­R401 1 5% 1/2W Fusible 31059-002-010 ­R420 3.3 5% 1/2W Fusible 31059-002-020 ­R423 8200 1% 1/4W 31049-307-080 ­R432 120K 1% 1/4W 31049-275-124 ­R444 .47 10% 1W Fusible 31059-428-047 ­R720 1.9 5% 2W Fusible 31059-004-019 ­R802 903/50 PTC Cold 32189-609-360 ­R803 1 5% 15W Wirewound 31039-887-109 ­R805 220 2% 1/4W 31049-276-221 QW122
R807 1200 2% 1/4W 31018-276-122 QW212
R815 100 5% 5W Wirewound 31039-567-101 5W110
R822 .47 10% 1W Fusible 31059-428-047 ­R843 5000 PTC Cold 32189-102-030 ­RT901 10K 5% X 4 Network 31062-205-103 ­RT902 82K 5% X 5 Network 31062-206-823 ­RT903 10K 5% X 4 Network 31062-206-103 ­VR101 10K AGC 31249-128-001 ­VR201 10K AFT 31249-128-001 ­VR202 50K Sub Brightness 31249-128-008 ­VR301 5000 Vertical Height 31249-128-005 ­VR402 10K Horizontal Phase 31249-128-001 ­VR752 200 Red Drive 31249-125-009 ­VR753 200 Blue Drive 31249-125-009 ­VR756 2200 Green Cutoff - -

2000 Green Cutoff 31249-125-008 -

VR757 2200 Red Cutoff - -

2000 Red Cutoff 31249-125-008 -

VR758 2200 Blue Cutoff - -

2000 Blue Cutoff 31249-125-008 -

VR801 2000 125V B+ - -

2300 125V B+ 31249-128-003 -

PARTS LIST continued

CAPACITORS & ELECTROLYTICS

Item No. Rating Mfr. Part No.

C100 47pF 5% 50V NPO 31407-105-260
C101 33pF 5% 50V NPO 31407-057-330
C206 33pF 5% 50V NPO 31407-057-330
C209 10µF 20% 50V NP 31607-974-003
C252, 53 10µF 16V NP 31607-803-120
C261 .47µF 50V NP 31607-402-530
C406 100pF 5% NPO 31407-105-660
C416 .003 5% 1.6KV 31509-391-010
C417 .0039 5% 1.6KV 31519-400-006
C500 39pF 5% 50V NPO 31407-057-390
C502 33pF 5% 50V NPO 31407-057-330
C600, 01 47pF 5% 50V NPO 31407-105-260
C604 7pF ±.25pF 50V NPO 31407-052-709
C606 18pF 5% 50V NPO 31407-057-180
C702 680pF 2KV -

.001 2KV 31418-780-103

C703 680pF 2KV -

10µF 250V 31609-403-490
C804 Thur
C806 .0022 250V 31469-102-010
C809 100pF 5% 50V N220 31407-106-260
C812, 15 .0068 20% 1KV 31419-901-430
C816 680pF 10% 2KV 31417-901-410
C817, 20 270pF 10% 2KV 31417-901-180
C901, 02, 04 22pF 5% 50V NPO 31407-105-180
C908 68pF 5% 50V NPO 31407-105-300
CH01 33pF 5% 50V NPO 31407-057-330
CH2 30pF 5% 50V NPO 31407-105-270
CT901 330pF X 3 Network 31497-009-430
CT902 330pF X 5 Network 31497-009-440
CT903 330pF X 8 Network 31497-009-360
CT904, 05 330pF X 4 Network 31497-009-340
CT906 330pF X 5 Network 31497-009-440
CV01 10pF ±.25pF 50V NPO 31407-105-090
CV03 22pF 5% 50V NPO 31407-105-180

PARTS LIST continued

CABINET PARTS

Item Mfr. Part No.

Cabinet Front 36001-690-010
Cabinet Rear 36001-691-010
Door 37642-140-331
Grille, Speaker 37713-232-310
Knob, Power 37623-160-030
Window, Left 37653-126-610
Window, Right 37653-126-520