Samsung TXB2025 Instruction manual

SAMSUNG
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
Models Chassis
TXB2025/CX K52MB
Circuitry not used in some versions.
Circuitry used in some versions.
Ground
Chassis ground
Common tie point
Taken from common tie point
Schematic voltage source tie point.
Cabling: Heavy lines reduce use of multiple lines.
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.
For SAFETY use only equivalent replacement part,
see parts list.
3
A
SCHEMATIC NOTES
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.

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.

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

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

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
PARTS LIST continued

D101, 02 1N4148 32167-406-480 NTE519 ECG519 SK3100
D201 1N4003 32167-201-070 NTE116 ECG116 SK3113
D202 1N4148 32167-406-480 NTE519 ECG519 SK3100
D204 EQA02-06D 32167-408-080 NTE5013A ECG5013A SK6A2
D209 (1) 1N4003 32167-201-070 NTE116 ECG116 SK3113
D212 (1) 1N4148 32167-406-480 NTE519 ECG519 SK3100
D301 TVR10G 32167-201-170 NTE552 ECG552 SK9000
D302 1N4003 32167-201-070 NTE116 ECG116 SK3113
D305, 06 1N4148 32167-406-480 NTE519 ECG519 SK3100
D401 TVR10G 32167-201-170 NTE552 ECG552 SK9000
D402 KF104 32167-201-110 - - -
TVR10G 32167-201-170 NTE552 ECG552 SK9000
D403, 04 1N4003 32167-201-070 NTE116 ECG116 SK3113
D405 KF104 32167-201-110 - - -
D406 Thru
D408 1N4148 32167-406-480 NTE519 ECG519 SK3100
D410, 11 1N4148 32167-406-480 NTE519 ECG519 SK3100
D415, 20 1N4148 32167-406-480 NTE519 ECG519 SK3100
D501 Thru
D504 1N4148 32167-406-480 NTE519 ECG519 SK3100
D601 1N4148 32167-406-480 NTE519 ECG519 SK3100
D701 Thru
D703 1N4148 32167-406-480 NTE519 ECG519 SK3100
D800 S05K150 -NTE1V150 ECG1V150 SKMV150H
SI0V-S05K150 32189-106-120 NTE1V150 ECG1V150 SKMV150H
D801 Thru
D804 ERB12-06 32167-208-580 NTE125 ECG125 SK3081
D806, 07 KF104 32167-201-110 - - -
TVR06G -NTE116 ECG116 SK3313
D808 RH-2F -NTE558 ECG558 SK3998
RH10FV1 32167-301-670 - - -
D809 KF104 32167-201-110 - - -
TVR06G -NTE116 ECG116 SK3313
D810 BYW96D 32167-501-030 - - SK5040
BYT77 32167-501-030 - - SK5040
BY299 -NTE506 ECG506 SK3925
D812 1R5GU41 32167-207-120 - - -
D822 1N4003 32167-201-070 NTE116 ECG116 SK3113
D902 Thru
D910 1N4148 32167-406-480 NTE519 ECG519 SK3100
D912 Thru
D915 1N4148 32167-406-480 NTE519 ECG519 SK3100
D918 Thru
D925 1N4148 32167-406-480 NTE519 ECG519 SK3100
D926 (1) 1N4148 32167-406-480 NTE519 ECG519 SK3100
D927 1N4148 32167-406-480 NTE519 ECG519 SK3100
D945, 46 1N4148 32167-406-480 NTE519 ECG519 SK3100
D948, 49 1N4148 32167-406-480 NTE519 ECG519 SK3100
DC01 1N4148 32167-406-480 NTE519 ECG519 SK3100
DC05 Thru
DC08 1N4148 32167-406-480 NTE519 ECG519 SK3100
(1) Used in some versions.
SEMICONDUCTORS
(Select the replacement that gives the best results.)
Item No. Type No. Mfr. Part No. NTE Part No. ECG Part No. TCE Part No.

DV01 1N4148 32167-406-480 NTE519 ECG519 SK3100
DZ01 EQB01-33 32167-403-850 NTE147A ECG147A SK33V
DZ02 MTZ5.1B 32167-406-080 NTE5010A ECG5010A SK5A1
DZ05 EQA02-06D 32167-408-080 NTE5013A ECG5013A SK6A2
MTZ6.2B 32167-408-080 NTE5013A ECG5013A SK6A2
DZ06 MTZ6.8C 32167-441-011 NTE5014A ECG5014A SK6A8
DZ07 MTZ9.1B 32167-406-130 NTE5018A ECG5018A SK9A1
DZ08 EQA02-06D 32167-408-080 NTE5013A ECG5013A SK6A2
MTZ6.2B 32167-408-080 NTE5013A ECG5013A SK6A2
DZ09 EQA02-06D 32167-408-080 NTE5013A ECG5013A SK6A2
MTZ6.2B 32167-408-080 NTE5013A ECG5013A SK6A2
DZ10 MTZ5.1B 32167-406-080 NTE5010A ECG5010A SK5A1
DZ15 MTZ5.1B 32167-406-080 NTE5010A ECG5010A SK5A1
DZ31, 32 EQB01-33 32167-403-850 NTE147A ECG147A SK33V
DZ802 EQA02-06D 32167-408-080 NTE5013A ECG5013A SK6A2
MTZ6.2B 32167-408-080 NTE5013A ECG5013A SK6A2
DZ823 MTZ18A 32167-406-190 - - -
IC01 Z8612812PSC 32109-110-086 - - -
IC101 TA8725AN 32119-710-019 - - -
IC200 HCF0053 32199-500-000 - - -
IC301 TA8445K 32119-110-010 - - -
IC600 SBX1637A 32199-411-090 - - -
IC601 AN5836 32119-102-730 NTE1780 ECG1780 SK9731
IC602 TA8200AH 32119-201-190 NTE7068 ECG7068 -
IC801 TDA4601 32119-401-010 NTE7002 ECG7002 SK10471
IC901 SZM226EC - - - -
ICV01 TC4053BP 32119-201-310 NTE4053B ECG4053B SK4053B
LED01, 02 SL-5R 32309-110-230 - - -
DL-ILR 32309-110-230 - - -
Q100 KTC3197-AT 32137-301-080 NTE107 ECG107 SK3293
2SC388A -NTE107 ECG107 SK3293
Q105 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q202, 03 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q301, 02 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q400 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q401 KSC2331-Y 32137-301-560 NTE24 ECG24 SK3849
Q402 2SD1651YD 32159-210-003 NTE2331 ECG2331 SK9422
2SD1555 -NTE2331 ECG2331 SK9422
Q403 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q404 KSA539-Y 32137-401-530 NTE159 ECG159 SK3466
Q405 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q406 MC7812C 32117-901-110 NTE966 ECG966 SK3592
Q407 MC7809C 32117-401-120 - - -
Q500 KSA642-O 32137-103-430 NTE159 ECG159 SK3466
Q601, 80 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q702 Thru
Q704 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q708 Thru
Q710 2SC2068 -NTE376 ECG376 SK3219
KTC2068 32139-410-006 NTE376 ECG376 SK3219
Q801 2SC3552L 32149-301-010 NTE2348 ECG2348 -
Q808 KSC2331-Y 32137-301-560 NTE24 ECG24 SK3849
Q809 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
Q902 KSA539-Y 32137-401-530 NTE159 ECG159 SK3466
Q903 KSC2331-Y 32137-301-560 NTE24 ECG24 SK3849
SEMICONDUCTORS continued
(Select the replacement that gives the best results.)
Item No. Type No. Mfr. Part No. NTE Part No. ECG Part No. TCE Part No.

QC01 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
QV01 KSA539-Y 32137-401-530 NTE159 ECG159 SK3466
QV02, 03 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
QV05 KSA539-Y 32137-401-530 NTE159 ECG159 SK3466
QV06 KSC815-Y 32137-301-720 NTE123AP ECG123AP SK3854
SEMICONDUCTORS continued
(Select the replacement that gives the best results.)
Item No. Type No. Mfr. Part No. NTE Part No. ECG Part No. TCE Part No.