Thomson RP7930B SERVICE MANUAL

RP-7930B VOLTAGE CHART

5-1

RP-7930B VOLTAGE CHART

5-2

RP7930B
APRIL/01

Audio/Communication
Basic Service Data

Latin America After Sales

Indianapolis, IN 46290 U.S.A.

SERVICE DATA INDEX

General Information/Safety Precautions ......................................................................... 1-2

Disassembly ................................................................................................................... 2-1

Alignments ...................................................................................................................... 3-1

Troubleshooting Guides ................................................................................................. 4-1

Trouble Aids (Waveforms, Voltage, Timing Charts) ...................................................... 5-1

Replacement Partslist ..................................................................................................... 6-1

Exploded Views .............................................................................................................. 7-1

Block Diagrams ............................................................................................................... 8-1

Schematic Diagrams ........................................................................................................ 9-1

Circuit Boards ................................................................................................................. 10-1

RP7930B

Page

Number

CAUTION: Modification or repair of this unit by unauthorized persons is a direct violation of FCC Rules Part 68.216 and could

result in risk of electric shock. You are urged to contact a qualified factory authorized service facility for repairs.

SAFETY NOTICE

USE ISOLATION TRANSFORMER WHEN SERVICING

Components having special safety characteristics are identified by a ( ) on schematics and on the parts list in this Service Data and its bulletins.
Before servicing this instrument, it is important that the service technician read and follow the "Safety Precautions" in the Basic Service Data.

First Edition - First Printing
Copyright 2001 - Thomson Multimedia, Inc.
Printed in U.S.A. - Trademark(s)

®

Registered - Marca(s) Registrada(s)

RP7930B

RP-7930B ALIGNMENTS

3-1

RP-7930B ALIGNMENTS

3-2

RP-7930B ALIGNMENTS

3-3

RP-7930B ALIGNMENTS

3-4

RP-7930B ALIGNMENTS

3-5

RP-7930B ALIGNMENTS

3-6

BLOCK DIAGRAM RP-7930B

8-7

RP-7930B SPECIFICATIONS

1-3

RP-7930B SPECIFICATIONS

1-4

CABINET AND CHASSIS ASSEMBLY

7-1

RP-7930B IC LEAD IDENTIFICATION

8-1

RP-7930B IC LEAD IDENTIFICATIONS

8-2

RP-7930B IC LEAD IDENTIFICATIONS

KA9220C

8-3

RP-7930B IC LEAD IDENTIFICATIONS

8-4

RP-7930B IC LEAD IDENTIFICATIONS

8-5

RP-7930B IC LEAD IDENTIFICATIONS

8-6

SAFETY PRECAUTIONS

1. Before returning the instrument to the customer, always
make a safety check of the entire instrument, including, but not
limited to, the following items:

a. Be sure that no built-in protective devices are defective and/

or have been defeated during servicing. (1) Protective
shields are provided on this instrument to protect both the
technician and the customer. Correctly replace all missing
protective shields, including any removed for servicing
convenience. (2) When reassembling the instrument, be
sure to put back in place all protective devices, including, but
not limited to, nonmetallic control knobs, insulating fishpapers,
adjustment and compartment covers/shields, and isolation
resistor/capacitor networks. Do not operate this instrument

or permit it to be operated without all protective devices
correctly installed and functioning. Servicers who defeat
safety features or fail to perform safety checks may be
liable for any resulting damage, and may expose
themselves and others to possible injury.

b. Be sure that there are no cabinet openings through which an

adult or child might be able to insert their fingers and contact
a hazardous voltage. Such openings include, but are not
limited to, (1) excessively wide cabinet ventilation slots, and
(2) improperly fitted and/or incorrectly secured cabinet covers.

c. Leakage Cold Check - With the instrument AC plug removed

from any AC source, connect an electrical jumper across the
two AC plug prongs. Place the instrument AC switch in the
on position. Connect one lead of an ohmmeter to the AC plug
prongs tied together and touch the other ohmmeter lead in
turn to each push button/customer control, exposed metal
screws, metallized overlays and to each cable connector. If
the measured resistance is less than 1.0 megohm or greater
than 5.2 megohm an abnormality exists that must be corrected
before the instrument is returned to the customer. Repeat
this test with the AC switch in the off position.

d. Leakage Current Hot Check

On completely assembled instrument, plug the AC line cord
directly into a 120V AC outlet. (Do not use an isolation
transformer during this test.) Use a leakage current tester or
a metering system that complies with American National
Standards Institute (ANSI) C101.1 Leakage Current for

Appliances and Underwriters Laboratories (UL) 1492 (Section

67). Measure for current from a known earth ground (metal

waterpipe, conduit, etc.) to all exposed metal or conductive
parts of the instrument (antenna connections, handle bracket,
metal cabinet, screwheads, metallic overlays, push-buttons,
control shafts, etc.), especially any exposed metal parts that
offer an electrical return path to the chassis. Any current
measured must not exceed 0.5 milliamp. Reverse the
instrument power cord plug in the outlet and repeat the test.

ANY MEASUREMENTS NOT WITHIN THE LIMITS
SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK
HAZARD THAT MUST BE ELIMINATED BEFORE
RETURNING THE INSTRUMENT TO THE CUSTOMER OR
BEFORE CONNECTING TO ANTENNA OR
ACCESSORIES.

e. Interconnected Equipment AC Leakage Test

Avoid shock hazards. The instrument, accessory, or cable(s)
to which this instrument is connected should have the
applicable sections of the leakage resistance cold check and
the leakage current hot check performed. Do not connect
this instrument to an antenna, cable or accessory that
exhibits excessive leakage currents.

2. Read and comply with all caution and safety-related notes on or
inside the instrument cabinet, and on the chassis.

3. Design Alteration Warning - Do not alter or add to the mechanical
or electrical design of this instrument. Design alterations and
additions, including, but not limited to, circuit modifications and
the addition of items such as auxiliary audio output connections,
cables and accessories, etc., might alter the safety characteristics
of this instrument and create a hazard to the user. Any design
alterations or additions will void the manufacturer's warranty and
will make you, the servicer responsible for personal injury or
property damage resulting therefrom.

4. Observe original lead dress. Take extra care to assure correct
lead dress in the following areas: (a) near sharp edges, (b) near
thermally hot parts - be sure that leads and components do not
touch thermally hot parts, and (c) the AC supply. Always inspect
in all areas for pinched, out-of-place, or frayed wiring. Do not
change spacing between components and the printed-circuit
board. Check AC power cord for damage.

5. Components, parts and/or wiring that appear to have overheated
or are otherwise damaged should be replaced with components,
parts or wiring that meet original specifications. Additionally,
determine the cause of overheating and/or damage and, if
necessary, take corrective action to remove any potential safety
hazard.

6. PRODUCT SAFETY NOTICE - Many electrical and mechanical
parts have special safety-related characteristics, some of which
are often not evident from visual inspection, nor can the protection
they give be obtained by replacing them with components rated
for higher voltage, wattage, etc. Parts that have special safety
characteristics are identified in this service data by a ( ! ) on
schematics and in the parts list. Use of a substitute replacement
that does not have the same safety characteristics as the
recommended replacement part in this service data parts list
might create shock, fire and/or other hazards. Product Safety is
under review continuously and new instructions are issued
whenever appropriate. For the latest information, always consult
the appropriate current service literature.

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RP-7930B SPECIFICATIONS

1-5

RP-7930B SPECIFICATIONS

1-6

RP-7930B TROUBLESHOOTING GUIDES

4-1

RP-7930B TROUBLESHOOTING GUIDES

4-2

REPLACEMENT PARTS

6-1

March

2000

RP7930B

6-1

BEFORE REPLACING PARTS, READ THE FOLLOWING:
Approved Substitute Stock Numbers - Before ordering stock numbers

in the part list, look for an approved substitute stock number in the
current Price Schedule. This will minimize your service time and
avoid ordering parts you already have in stock.

PRODUCT SAFETY NOTE: Components marked with a critical
safety symbol have special characteristics important to safety.
Before replacing any of these components, carefully read the
PRODUCT SAFETY NOTICE in the basic service data. Do not
degrade the safety of the set through improper servicing. Although
assemblies as a whole may not be marked with a critical safety
symbol , replacement of assemblies with other assemblies not
approved may result in a safety hazard.

Critical Safety Symbol
Not Eligible For Warranty

@NOTE: When ordering components that are listed more than once in this part list, always adhere to the serial number application guidelines
given in the description column. If a serial number application guideline is not given, always select the component with a value, rating, other
specification or identification marking(s) that match those of the corresponding component in the instrument you are servicing.

StockSymbol DescriptionDrawing Symbol StockDescription Drawing

Warranty Status of Assemblies and Parts - All assemblies and
components shown in this part list are eligible for warranty exchange
or replacement except those with a dot shown to the left of the
Description. Assemblies and components with a dot to the left of the
Description are NOT eligible for warranty exchange or replacement.

Warranty replacement of cabinet parts requires the approval of a
Thomson Consumer Electronics Field Service Manager.

Warranty Status and Specifications of assemblies and components
are subject to change without notice. Consult the TCE Parts Pricing
Microfiche for the latest warranty status information.

RP-7930B
CABINET & CHASSIS

1 6A26787 LENS, CASSETTE DOOR43-07930-02
2 9A26788 DOOR, CASSETTE66-07930-02
3 3A26789 SPRING, CASSETTE DOOR36-07930-00
4 6A28734 LENS, DISPLAY CD43-07930-01
5 89A26791 GRILLE, NET "R"41-07930-01
6 45A26792 FOOT, RUBBER81-00088-00H
7 98A26793 PANEL, FRONT60-07930-01
14 43A28737 BUTTON, "R" CD53-07931-01
15 43A28736 BUTTON, "L" CD53-07931-00
17 89A26799 GRILLE, NET "L"41-07930-00
18 43A25141 KNOB, TUNING51-00088-00
34 43A28735 KEY, CASSETTE COMMAND53-07930-01
40 3A28739 SPRING, BATTERY TERMINAL74-13244-00B
42 98A26800 CABINET, REAR61-07930-01
45 9A25146 DOOR, BATTERY58-00088-00
46 38A25143 SPRING, BATTERY74-13244-01A
48 43A26802 KNOB, SLIDE52-00088-00
50 9A30713 COVER, HANDLE57-07930-02
51 78A26803 HANDLE57-07930-01
55 43A25134 BUTTON, BASS BOOST53-00088-02
56 43A25150 KNOB, ROTARY VOLUME51-00088-02
66 2A28743 PLATE, CLAMPER39-07930-06
67 2A25164 HOLDER, CLAMPER55-00141-01
68 2A28744 CLAMPER55-09019-01A
69 60A26917 FELT68-00023-00
70 2A28745 MAGNET97-09019-00
72 9A26811 DOOR, CD66-07930-01

73 43A25160 BUTTON, EJECT CD53-00088-03
74 3A28738 SPRING, CD DOOR OPEN36-00088-01D
78 3A26814 SPRING, CD DOOR36-07930-01
COR 66A21431 CORD, AC/POWER30-00030-00G
MEC 73A28740 MECHANISM, CD ASY00-00231-01

CASSETTE MECHANISM

4 5A26780 REEL, TAKEUP ASY003530301
5 5A26781 REEL, SUPPLY ASY003530031
7 2A25203 GEAR FF000110070
8 2A26782 ARM, RS000110069
31 1A25204 ROLLER ARM ASY002328301
34 2A26783 ARM, RF ASY011120301
36 1A25205 BELT, FLYWHEEL011135015
37 2A25206 FLYWHEEL, ASY009036301
38 1A25207 BELT, MAIN009064085
40 6A25208 PULLEY005036003
48 2A25209 SLIDER, E030014002
49 39A25210 SWITCH, MAIN020428100
51 72A22523 MOTOREG-530AD-9B
52 62A25211 HEAD R/PYB-BS0951
CAS 62A25137 CASSETTE MECHANISM94-10200-02

ELECTRICAL COMPONENTS

ANT 82A26821 ANTENNA, ROD23-07930-00
CF101 36A25175 FILTER09-50107-20T
CF102 36A25176 FILTER09-00455-01T
D101 EA16X0878 DIODE 1N414802-04148-00
D102 EA16X0878 DIODE 1N414802-04148-00
D103 16A11218 DIODE FV-104302-01043-00
D104 17A25173 DIODE LED02-50000-02T

6-2

REPLACEMENT PARTS

March

2000

6-2

StockSymbol DescriptionDrawing Symbol StockDescription Drawing

(Continued)

D201 198597 DIODE 1N400102-04001-00
D202 198597 DIODE 1N400102-04001-00
D203 198597 DIODE 1N400102-04001-00
D204 16A14915 DIODE ZENER02-50068-00
D205 EA16X0878 DIODE 1N414802-04148-00
D206 EA16X0878 DIODE 1N414802-04148-00
D207 16A24329 DIODE ZENER02-50075-00
D208 EA16X0878 DIODE 1N414802-04148-00
D801 EA16X0878 DIODE 1N414802-04148-00
D802 EA16X0878 DIODE 1N414802-04148-00
D807 EA16X0878 DIODE 1N414802-04148-00
D808 EA16X0878 DIODE 1N414802-04148-00
D810 EA16X0878 DIODE 1N414802-04148-00
IC101 EA33X9422 IC AN720503-07205-00
IC102 33A25174 IC AN702403-07024-00
IC201 EA33X9424 IC AN731203-07312-00
IC202 33A25179 IC TA7769P03-07769-00
IC801 33A26826 IC KA9220B03-09220-01
IC802 33A26828 IC KS9282B03-09282-00
IC803 33A26827 IC KA927003-09270-00
IC804 33A26829 IC KS57C0104-1203-57010-43
IC805 33A26775 IC KA9258D03-09258-00
J201 41A25180 JACK12-00035-31
LCD1 63A26831 DISPLAY LCD91-00088-03
Q201 15A26816 TRANSISTOR 9013G01-09013-07
Q202 15A11215 TRANSISTOR 9014C01-09014-03
Q203 15A26816 TRANSISTOR 9013G01-09013-07
Q204 15A11215 TRANSISTOR 9014C01-09014-03
Q205 15A11215 TRANSISTOR 9014C01-09014-03
Q206 15A26815 TRANSISTOR 2SD201201-02012-00
Q207 15A15170 TRANSISTOR 9014C01-09015-03
Q208 15A11215 TRANSISTOR 9014C01-09014-03
Q209 15A11215 TRANSISTOR 9014C01-09014-03
Q801 15A10368 TRANSISTOR KSA928A-Y01-00928-00
Q802 15A12584 TRANSISTOR DTC124ES01-00124-05
Q803 15A25193 TRANSISTOR 2SA131701-01317-00
SOC 8A25151 SOCKET AC12-00004-09
SPE 95A28741 SPEAKER14-03508-340
SW1 39A26820 SWITCH TACT16-10102-03S
SW101 39A26770 SWITCH SLIDE16-10202-44L
SW2 39A26820 SWITCH TACT16-10102-03S
SW201 39A25182 SWITCH PUSH16-10902-02L
SW202 39A25187 SWITCH PUSH16-10202-15L
SW203 39A25183 SWITCH SLIDE16-10603-09L
SW204 39A25184 SWITCH SLIDE16-10203-58L
SW3 39A26820 SWITCH TACT16-10102-03S
SW4 39A26820 SWITCH TACT16-10102-03S
SW5 39A26820 SWITCH TACT16-10102-03S
SW6 39A26820 SWITCH TACT16-10102-03S
SWI 39A25181 SWITCH MICRO CD DOOR16-10101-07H
SWI 39A26818 SWITCH LEAF BATTERY11-00088-15A
SWI 39A28742 SWITCH LEAF31-60350-54
TRA 88A25152 TRANSFORMER POWER15-00088-05

X801 41A26776 CRYSTAL04-16934-41