RCA CTC185C2-3, 27B12T Service Manual

E:fact® Technical Service Data

INDEX

Parts List

Coils & Transformers
Miscellaneous
Controls & Resistors, 2 pages
Capacitors & Electrolytics
Cabinet Parts
Semiconductors, 2 pages

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

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

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

Power Supply .................. 2E

System Control ................. 2F

Tuner ...................... 2G, 2H

Placement Chart

RCA

Models Chassis

F19205GYTX2 CTC185C2
F19205GYTX2 CTC185C3
F19206BKTX2 CTC185C2
F19206BKTX2 CTC185C3
F19207BCTX2 CTC185C2

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 #4219

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

For E:fact ordering or information,
use the following web site link.

http://www.hwsams.com/efact.html

Product #084219
© Copyright 1999

Howard W. Sams & Co. 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.

FB3101 Ferrite Bead 226467
FB3901 Ferrite Bead 226467
FB4110, 11 Ferrite Bead 215546
FB4401 Ferrite Bead 227410
FB4501 Ferrite Bead 215547
L2301 15µH 197613
L2302 VCO 215502
L2303 FM Tank 233056
L2305 10µH 175409
L2701, 02, 03 8.2µH 149170
L2705 10µH 175409

# L4000

# L4001 Line Choke 190507

# L4200 Degaussing 242527

# T4301 Horizontal Driver 215541
# T4401 (1) Horizontal Output 242221

(2) Yoke Horiz 2.9mH -

Vert 22.5mH

L4102 320µH 231466

L4401 6.8µH 191141
L5001 180µH 231467
L7101 - 215507
L7102 - 236641
L7103 - 223929
L7104, 05 - 236642
L7106 - 237456
L7107 - 233057
L7108 - 233074
L7109 3.9µH 200559
L7110 - 233075
L7111 - 233076
L7112 - 231441
L7113 - 233077
L7114 - 231441
L7115 - 233078
L7116 - 237461
L7117 - 237460
L7118 - 237461
L7301 - 231443
L7302 - 231444
L7303 - 233079
L7304 - 233080
L7305 - 236643
L7306 - 231448

# For SAFETY use only equivalent replacement part.

(1) Focus and screen controls are part of T4401.
(2) Yoke is bonded part of CRT assembly.

PARTS LIST continued

MISCELLANEOUS

Item No. Description Mfr. Part No. Notes

CF1201 Filter 195702 4.5MHz
CF2301 Filter 181125 4.5MHz

# F4001 Fuse 175425 5Amp, 125V, Fast Acting

IR3402 Receiver 237682 Remote
J101 Jack 215543 RF

# K4201
# KS5001
# PW4001

SF2301 Filter 217318 SAW
SP1902 Speaker 233442 2 1/4" X 3 1/2", 32 Ohms, 1.5W
SW3410 Switch 215500 Channel Up
SW3411 Switch 215500 Power
SW3420 Switch 215500 Channel Down
SW3421 Switch 215500 Volume Up
SW3430 Switch 215500 Menu
SW3431 Switch 215500 Volume Down

# V5000 CRT A48ARD891 A48KRD89X01

Y2801 Crystal 161235 3.58MHz
Y3101 Crystal 217322 8MHz
Y4101 Crystal 227064 507.5kHz
Y7401 Crystal 230708 4MHz

Relay 190490 Degaussing
Socket 233120 CRT
Line Cord 215576 AC, Polarized

Fuse Holder 176642 For F4001 (2 Used)
Transmitter 240959 Remote

# For SAFETY use only equivalent replacement part.

PARTS LIST continued

CONTROLS & RESISTORS

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

# R1907
# R1908
# R1908

# R3108 10 5% 1/4W 241259 QW010

# R4001
# R4002 1000 5% 10W 231504 10W210
# R4004 1.8M 10% 1/2W 220333 HW518
# R4103 .12 5% 2W Wirewound 242202 -
# R4105 2 5% 1/4W 181419 QW2D0
# R4106 8.2 5% 1W 235378 1W8D2

# R4114 10K 5% 3W 189989 3W310
# R4119 10 5% 1/4W 241259 QW010
# R4121 1000 5% 1/2W 175350 HW210
# R4122 2200 5% 1/4W 175042 QW222

# R4146 430 5% 1W 242207 1W143
# R4147 220 5% 3W 231461 3W122
# R4305 4700 5% 3W 175368 3W247
# R4402 91 5% 1/2W 227249 HW091
# R4404 360 5% 2W 231465 2W136
# R4507 1.5 5% 1W 178619 1W1D5
# R4511 1 10% 2W Wirewound 215577 -
# R4517 51 5% 1W 217314 1W051
# R4701 10 10% 1/2W 241261 HW010
# R4704 82K 10% 1/2W 239116 HW382
# R4705 27K 10% 1/2W 238958 HW327

# R4707 3.6 5% 5W 235699 -
# R4708 3000 5% 1W 200446 1W230
# R4710 3 5% 2W Wirewound 223898 -
# R4901 100 5% 1/4W 198667 QW110
# R4902 24.9K 1% 1/4W 235700 -
# R4903 41.2K 1% 1/4W 176500 -

(1) 33 5% 2W 196014 2W033

(2) 56 5% 3W 231514 3W056
R2302, 03 120K 2% 1/10W 207834 ­R2304, 17 1000 2% 1/10W 197638 ­R2702 7500 2% 1/4W 175761 QW275
R2801 30K 2% 1/10W 200176 ­R2804 27K 2% 1/4W 175326 QW327

R3111, 12 220 2% 1/4W 175324 QW122

R3202 120K 2% 1/10W 207834 -

R4111 100K 1% 1/10W 215221 -

R4136 143K 1% 1/4W 184980 ­R4137 2870 1% 1/10W 231505 ­R4142 30K 2% 1/10W 200176 -

R4706 1270 1% 1/4W 231516 -

R4906 1500 2% 1/10W 197628 -

4.7 5% 1/4W 200197 QW4D7

220 5% 1/4W - QW122

120K 5% 1/10W - -

2.7 10% 15W Wirewound 190487 -

# For SAFETY use only equivalent replacement part.

(1) Used in chassis CTC185C3.
(2) Used in chassis CTC185C2.

PARTS LIST continued

CONTROLS & RESISTORS continued

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

# R5001, 02, 03 20K 2% 2W 233034 2W320
# R5004, 05, 06 2200 10% 1/2W 502222 HW222
# R5010 2200 10% 1/2W 502222 HW222

R5012 270 2% 1/4W 178282 QW127
R5014, 16 300 2% 1W 175354 QW130

# R5018 2200 10% 1/2W 502222 HW222

R5019 7500 2% 1/4W 175761 QW275

6200 2% 1/4W 179316 QW262

R5020 510 2% 1/4W 240937 QW151

910 2% 1/4W 203097 QW191
820 2% 1/4W 175043 QW182
680 2% 1/4W 175312 QW168

# R5021 1200 5% 1W 179782 1W212
# R7139, 40 1.8M 10% 1/2W 220333 HW518

RN4501 Resistor Network 215499 -

# RT4201 5.5 PTC Cold 207768 -

# For SAFETY use only equivalent replacement part.