RCA F27730EMJX1 User manual

SAFETY PRECASAFETY PRECA
SAFETY PRECASAFETY PRECA
SAFETY PRECAUTIONSUTIONS
UTIONSUTIONS
UTIONS
INDEXINDEX
INDEXINDEX
INDEX
SET 4552SET 4552 SET 4552SET 4552
SET 4552
MODEL F27730EMFB1 (CHASSIS CTC169CF5)MODEL F27730EMFB1 (CHASSIS CTC169CF5) MODEL F27730EMFB1 (CHASSIS CTC169CF5)MODEL F27730EMFB1 (CHASSIS CTC169CF5)
MODEL F27730EMFB1 (CHASSIS CTC169CF5)
RCARCA RCARCA
RCA
High Voltage Shutdown Test .................. 1
IC Functions ........................................... 1
Important Parts Information ................... 1
Miscellaneous Adjustments .................... 1
New Circuit ............................................ 1
Parts List ................................................. 6
Placement Chart ................................. 4, 5
Safety Precautions .................................. 1
Schematic Component Location ............ 4
Schematic Notes ..................................... 2
Schematics
Audio ............................................... 3
CRT ................................................. 2
PIP ................................................... 4
Power Supply .................................. 2
SRS Audio ....................................... 4
System Control ................................ 3
Television ........................................ 2
Tuner ............................................... 1
Video Switching/Comb Filter/
Black Stretch ................................... 3
Test Equipment ....................................... 1
Tuner Information .................................. 1
For Supplier AdFor Supplier Ad
For Supplier AdFor Supplier Ad
For Supplier Address,dress,
dress,dress,
dress,
See PHOSee PHO
See PHOSee PHO
See PHOTT
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CT AnnCT Ann
CT Annual Indeual Inde
ual Indeual Inde
ual Indexx
xx
x
• ScSc
ScSc
Schematicshematics
hematicshematics
hematics
•Component locationsComponent locations
Component locationsComponent locations
Component locations
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Y 2002 SET 45522002 SET 4552
2002 SET 45522002 SET 4552
2002 SET 4552
RCARCA
RCARCA
RCA
Model F27730EMFB1 (Chassis CTC169CF5)Model F27730EMFB1 (Chassis CTC169CF5)
Model F27730EMFB1 (Chassis CTC169CF5)Model F27730EMFB1 (Chassis CTC169CF5)
Model F27730EMFB1 (Chassis CTC169CF5)
Coverage includes these additional models and chassis:
ModelsModels
ModelsModels
Models ChassisChassis
ChassisChassis
Chassis
F27730EMJX1 CTC169CF5
F27731BKFE1 CTC169CK5
F27731BKJX1 CTC169CK5
F27732SBFE1 CTC169CK5
G27750WKALM1 CTC169CF5
G27750WKDX1 CTC169CF5
G27750WKLM1 CTC169CF5
G27751ATLM1 CTC169CF5
4552
Technical Service Data
4552
SERSER
SERSER
SERVICEVICE
VICEVICE
VICE WARNINGWARNING
WARNINGWARNING
WARNING
Only qualified service technicians who are familiar with safety checks
and guidelines should perform service work. Before replacing parts,
disconnect power source to protect electrostatically sensitive parts. Do
not attempt to modify any circuit unless so recommended by the
manufacturer. When servicing the receiver, use an isolation transformer
between the line cord and power receptacle.
SERSER
SERSER
SERVICINGVICING
VICINGVICING
VICING THE HIGHTHE HIGH
THE HIGHTHE HIGH
THE HIGH VV
VV
VOLOL
OLOL
OLTT
TT
TAA
AA
AGE AND CRGE AND CR
GE AND CRGE AND CR
GE AND CRTT
TT
T
Use EXTREME CAUTION when servicing the high voltage circuits. To
discharge static high voltage, connect a 10K ohms resistor in series with a
test lead between the receiver ground and CRT anode lead. DO NOT lift
the CRT by the neck. Always wear shatterproof goggles when handling
the CRT to protect eyes in case of implosion.
X-RAX-RA
X-RAX-RA
X-RAY RADIAY RADIA
Y RADIAY RADIA
Y RADIATION AND HIGHTION AND HIGH
TION AND HIGHTION AND HIGH
TION AND HIGH VV
VV
VOLOL
OLOL
OLTT
TT
TAA
AA
AGE LIMITSGE LIMITS
GE LIMITSGE LIMITS
GE LIMITS
Be aware of the instructions and procedures covering X-ray radiation. In
solid-state receivers and monitors, the CRT is the only potential source of
X-rays. Keep an accurate high voltage meter available at all times. Check
meter calibration periodically. Whenever servicing a receiver, check the
high voltage at various brightness levels to be sure it is regulating
properly. Keep high voltage at rated value, NO HIGHER. Excessive high
voltage may cause X-ray radiation or failure of associated components.
DO NOT depend on protection circuits to keep voltage at rated value.
When troubleshooting a receiver with excessive high voltage, avoid close
contact with the CRT. DO NOT operate the receiver longer than
necessary. To locate the cause of excessive high voltage, use a variable
AC transformer to regulate voltage. In present receivers, many electrical
and mechanical components have safety related characteristics which are
not detectable by visual inspection. Such components are identified by a
# on both the schematic and the parts list. For SAFETY, use only
equivalent replacement parts when replacing these components.
GENERAL GUIDELINESGENERAL GUIDELINES
GENERAL GUIDELINESGENERAL GUIDELINES
GENERAL GUIDELINES
Perform a final SAFETY CHECK before returning receiver to customer.
Check repaired area for poorly soldered connections, and check entire
circuit board for solder splashes. Check board wiring for pinched wires or
wires contacting any high wattage resistors. Check that all control knobs,
shields, covers, grounds, and mounting hardware have been replaced. Be
sure to replace all insulators and restore proper lead dress.
SAFETY CHECKS — FIRE AND SHOCK HAZARDSAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARDSAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARD
Cold LeakaCold Leaka
Cold LeakaCold Leaka
Cold Leakagg
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ks fks f
ks for Receiveror Receiver
or Receiveror Receiver
or Receivers with Isolated Grs with Isolated Gr
s with Isolated Grs with Isolated Gr
s with Isolated Groundound
oundound
ound
Unplug the AC cord, connect a jumper across the plug prongs, and turn
the power switch on (if applicable). Use an ohmmeter to measure the
resistance between the jumped AC plug and any exposed metal cabinet
parts such as antenna screw heads, control shafts, or handle brackets.
Exposed metal parts with a return path should measure between 1M
ohms and 5.2M ohms. Parts without a return path must measure infinity.
Hot LeakaHot Leaka
Hot LeakaHot Leaka
Hot Leakagg
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Plug the AC cord directly into an AC outlet. DO NOT use an isolation
transformer. Use a 1500 ohms, 10W resistor in parallel with a .15µF
capacitor to connect between any exposed metal parts on the receiver and
a good earth ground. (See figure below.) Use an AC voltmeter with at
least 5000 ohms per volt sensitivity to measure the voltage across the
resistor. Check all exposed metal parts and measure voltage at each point.
Voltage measurements should not exceed .75VAC, 500µA. Any value
exceeding this limit constitutes a potential shock hazard and must be
corrected. If the AC plug is not polarized, reverse the AC plug and repeat
exposed metal part voltage measurement at each point.
The listing of any available replacement part herein in no case constitutes a recommendation, warranty, or guarantee by
SAMS Technical Publishing as to the quality and suitability of such replacement part. The numbers of the listed parts have
been compiled from information furnished to SAMS Technical Publishing by the manufacturers of the specific type of
replacement part listed.
Reproduction or use, without express permission, of editorial or pictorial content, in any manner, is prohibited. No patent
liability is assumed with respect to the use of the information contained herein.
© 2002
5436 West 78th Street
Indianapolis, IN 46268-4149
Printed in the United States of America 5 4 3 2 1 02PF01839
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SET 4552SET 4552
SET 4552
UPC
HERE
4552
Representative Model
HIGHHIGH
HIGHHIGH
HIGH VV
VV
VOLOL
OLOL
OLTT
TT
TAA
AA
AGE SHUTDOGE SHUTDO
GE SHUTDOGE SHUTDO
GE SHUTDOWNWN
WNWN
WN TESTTEST
TESTTEST
TEST
Apply 120VAC to set, turn set on, and adjust brightness and contrast to maximum. Short
XRP-1 to XRP-2. The set should shut down and then cycle on and off. If the set does not
shut down and then cycle on and off, the shutdown circuoit requires repair. To resume normal
operation remove the short from XRP-1 to XRP-2.

TUNER INFORMATION
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MISCELLANEOUS ADJUSTMENTS
TUNERTUNER
TUNERTUNER
TUNER VV
VV
VOLOL
OLOL
OLTT
TT
TAA
AA
AGE CHARGE CHAR
GE CHARGE CHAR
GE CHARTT
TT
T
PinPin
PinPin
Pin VHF LoVHF Lo
VHF LoVHF Lo
VHF Low Bandw Band
w Bandw Band
w Band VHF High BandVHF High Band
VHF High BandVHF High Band
VHF High Band UHF BandUHF Band
UHF BandUHF Band
UHF Band
1 (AGC) 5.4V 4.1V 7.9V
2 (+12V) 12.0V 12.0V 12.0V
3 (IF) 11.7V 11.6V 11.7V
4 (+33V) 33.0V 33.0V 33.0V
5 (-12V) -10.0V -10.0V -10.0V
6 (+5V) 5.0V 5.0V 5.0V
7 (SDA) 5.0V 5.0V 5.0V
8 (SCK) 5.0V 5.0V 5.0V
Note: VHF Low Band voltages taken on channel 2.
VHF High Band voltages taken on channel 7.
UHF Band voltages taken on channel 14
t(1)
t(8)
t(6)
t(4)
t(3)
t
t
(2)
(5)
t
(7)
TUNERTUNER
TUNERTUNER
TUNER TERMINAL GUIDETERMINAL GUIDE
TERMINAL GUIDETERMINAL GUIDE
TERMINAL GUIDE
ImporImpor
ImporImpor
Important Ptant P
tant Ptant P
tant Parar
arar
arts Infts Inf
ts Infts Inf
ts Informationormation
ormationormation
ormation
nThe parts listed here are those not usually available from a well-stocked supply cabinet or bin.
nWhere items may be replaced with equivalent parts, several alternates are shown from participating vendors.
nOn the parts lists, safety items are marked with a ##
##
# to remind you that only exact replacements are recommended for
these items.
nWhen ordering parts, state the model number, part number, and description.
Obtaining PObtaining P
Obtaining PObtaining P
Obtaining Parar
arar
artsts
tsts
ts
Many of these parts are available from your local Sams authorized distributor or the manufacturer of the equipment. Call
Sams for the name of your nearest distributor:
800-428-7267
Or consult the Sams Annual Index for the address of the original equipment manufacturer.
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ticipatingticipating
ticipating VV
VV
Vendorendor
endorendor
endorss
ss
s
Information on test equipment and replacement parts is listed in these pages for the following participating vendors.
Consult the Sams Annual Index for their current address.
nNTE Electronics, Inc. (NTE) nSencore, Inc.

SET 4552 PSET 4552 P
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TEST EQTEST EQ
TEST EQTEST EQ
TEST EQUIPMENTUIPMENT
UIPMENTUIPMENT
UIPMENT
Test equipment listed by participating manufacturer illustrates typical or
equivalent equipment used by Sams engineers to obtain measurements.
This equipment is compatible with most types used by field service
technicians.
EquipmentEquipment
EquipmentEquipment
Equipment Sencore No.Sencore No.
Sencore No.Sencore No.
Sencore No.
Oscilloscope SC3100
Generators
RGB CM2125
Multiburst Signal VG91
Color Bar VG91
TV Stereo VG91
Digital VOM SC3100
Frequency Meter SC3100
Hi-Voltage Probe HP200
Accessory Probes TP212
Isolation Transformer PR570
Capacitance Analyzer LC102
CRT Analyzer CR7000
AC Leakage Tester PR570
Inductance Analyzer LC102
Flyback Yoke Tester TVA92
Field Strength Meter SL753
Transistor Tester TF46
Horizontal Analyzer HA-2500
Video Analyzer VG91, TVA92

SET 4552 PSET 4552 P
SET 4552 PSET 4552 P
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RCA MODEL F27730EMFB1 (CHASSIS CTC169CF5)RCA MODEL F27730EMFB1 (CHASSIS CTC169CF5) RCA MODEL F27730EMFB1 (CHASSIS CTC169CF5)RCA MODEL F27730EMFB1 (CHASSIS CTC169CF5)
RCA MODEL F27730EMFB1 (CHASSIS CTC169CF5)

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