Belson BSA-1061 Schematic
BELSON
BSA-1061 (2 W remote)
MICRO COMPONENT SYSTEM
C.E.C BELSON/DPTO.TECNICO/MOD:BSA-1061/Ed.01
MODEL BSA-1061
CAUTION: Before servicing the chassis, read the " important service safety information"
section on page 2 of this manual.
MICRO HI-FI STEREO RADIO WITH CD PLAYER
SPECIFICATIONS CONTENTS
AM/FM
ANTENNA
FM : AERIAL
TUNING RANGE
AUDIO SECTION
SPEAKER IMPEDANCE : 4 OHM
GENERAL : 2 W x 2
POWER INPUT : AC 230 V, ~ 50Hz
AC POWER CONSUMPTION
DIMENSIONS : (136W)x(240D)x(146H)mm
TUNER SECTION
SYSTEM
AM : FERRITE BAR
PIGTAIL
530 - 1600
AM :
FM : 88 - 108 MHz
kHz
ANT.
IMPORTANT SERVICE SAFETY INFORMATION------2
ADJUSTMENT LOCATION--------------------------3
DISASSEMBLY INSTRUCTION----------------------4
ALIGNMENT PROCEDURES----------------------5-6
VOLTAGE CHARTS--------------------------------7
IC BLOCK DIAGRAMS-------------------------8-12
BLOCK DIAGRAM--------------------------------13
WIRING DIAGRAM------------------------------14
PRINTED CIRCUIT BOARDS-------------------15-16
SCHEMATIC DIAGRAMS-----------------------17-20
EXPLODED VIEW/PARTS LIST (CABINET)------21-23
C.E.C BELSON/DPTO.TECNICO/MOD:BSA-1061/Ed.01
IMPORTANT SERVICE SAFETY INFORMATION
1.SAFETY PRECAUTIONS
Before returning a unit to the customer, always make a safety check of the
Entire unit, 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 to protect both the technician and the
customer. Correctly replace all missing protective shields including any
removed for servicing convenience.
(2) when reinstalling the chassis and/or other assemblies in the cabinet, 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 isolating resistor/
capacitor networks. Do not operate this or permit it to be operated
Without all protective devices correctly installed and functioning .
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, excessively wide cabinet ventilation
slots, and an improperly fitted and/or incorrectly secured cabinet
back cover.
Leakage current hot check - with the unit completely reassembled ,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) 1410 (50.7). WITH THE UNIT AC
switch first in the ON position And then in the OFF position, measure from a known
earth ground (metal water pipe, conduit, etc.) To all exposed metal parts of the
Unit (antennas, handle bracket, metal cabinet, screw heads , metallic overlays,
control shaft, 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 unit power cord plug in the outlet and repeat test . ANY
MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HERENING INDICATE A POTENTIAL
SHOCK HAZARD THAT MUST BE ELIMINATED RETURNING THE UNIT TO THE CUSTOMER.
AC LEAKAGE TEST
TEST ALL
EXPOSED METAL
DEVICE
UNDER
TEST
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
D. Insulation resistance test cold check
unplug the power supply cord and connect a jumper wire between the two prongs
of the plug .
Turn on the power switch of the unit.
Measure the resistance with an ohmmeter between jumpered AC PLUG AND EACH
Exposed metallic cabinet part on the unit, such as screw heads, antenna, control
shafts, handle brackets, etc. When the exposed metallic part has a return path to
the chassis , the reading should be between 1 and 5.2 megohms. When there is
no return path to the chassis, the reading must be " infinite". If it is not within the
limits specified, there is the possibility of a shock hazard, and the unit must be
repaired and rechecked before it is returned to the customer.
SURFACES
(READING SHOULD
NOT BE ABOVE
0.5mA)
LEAKAGE
CURRENT
TESTER
EARTH
GROUND
ANTENNA
TERMINAL
EXPOSED
METAL
PAR T
OM
OHMMETER
2. PRODUCT SAFETY NOTICE
some electrical and mechanical parts have special safety related
characteristics which are often not evident from visual inspection.
Nor can the protection they give necessarily be obtained by replacing
them with components rated for higher voltage , wattage, etc. Parts
that have special safety characteristics are identified by a on
!
schematic and parts list. Use of a substitute replacement that dose not
have the same safety characteristics as the recommended replacement
part might create shock, fire, and/or other hazards. Product safety is
under review continuously and new instructions are issued whenever
Appropriate.
3. Servicing precautions
caution: before servicing the unit covered by this service by this service
manual and its supplements. Read and follow the SAFETY PRECAUTIONS on
this page. NOTE: if unforeseen circumstances create a conflict between
the following servicing precautions and any of the safety precautions,
always follow the safety precautions. Remember: safety first.
General servicing precautions.
A. Always unplug the unit's AC power cord from the AC power source
Before:
(1) removing or reinstalling any component, circuit board, module or
any other unit assembly.
(2) disconnecting or reconnecting any unit electrical plug or other
Electrical connection.
(3) connecting a test substitute in parallel with an electrical capacitor
caution: a wrong part substitution or incorrect polarity installation
Of electrolytic capacitors may result in an explosion hazard.
B. Do not defeat any plug/socket b+ voltage interlocks with which
the unit covered by this service manual might be equipped.
C. Do not apply AC power to this unit and/or any its electrical assemblies
unless all solid-state device heat sinks are correctly installed.
D. Always connect a test unit instrument's ground lead to the unit's
chassis ground before connecting the test instrument's positive lead
always remove the test instrument's ground lead last.
4. Laser precautions
warning!
1. When servicing.(In case it is necessary to confirm laser beam
emission ) be sure not to place your eyes any closer than 1 or
30cm from the surface of the objective lens on the Optical
pickup block.
HANDLING THE LASER PICKUP
2. Laser Diodes are Extremely Susceptible to damage from static
electricity even if a static discharge dies not ruin the diode, it can
shorten its life or cause it to work improperly. When replacing
the pickup, use a conductive mat on the floor and desk and wear
a wrist band connected to ground through a 1M ohm resistor to
protect the laser diode from static damage. If the lens should get
dusty, blow off the dust carefully from the object.
3. There are no adjustable parts in the pickup assembly. If it is defective,
replace the whole pickup assembly.
CAUTION:
USE OF CONTROLS, ADJUSTMENTS OR PERFORMANCE OF PROCEDURES
HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
DANGER:
IF INTERLOCK FAILS OR IS DEFEATED, THE LASER LIGHT IS ABLE TO
FUNCTION. THE LASER IS INVISIBLE, AVOID DIRECT EXPOSURE TO BEAM.
2
C.E.C BELSON/DPTO.TECNICO/MOD:BSA-1061/Ed.01
3
MODEL :BSA-1061
DISASSEMBLY INSTRUCTIONS
3x12KA
3x10PA
3x12KA
C.E.C BELSON/DPTO.TECNICO/MOD:BSA-1061/Ed.01
4
BSA-1061
ADJUSTMENT LOCATION
C.E.C BELSON/DPTO.TECNICO/MOD:BSA-1061/Ed.01
5
BSA-1061
ALIGNMENT PROCEDURE
ALIGNMENT INSTRUCTION
FM & FM STEREO SECTION NE -291/MW/FM/FM.ST IC-TA2111N DATE: 2002-05-10
STEP ALIGN TEST EQUIPMENT SIGNAL IN SIGNAL OUT ALIGNMENT REMARK
FREQ
1 10.7MHz (1) FM IF SWEEP THROUGH A TP4 & TP5 ADJUST T203 FOR PVC AT HIGH END
GENESCOPE 100PF AND GND MAX.OUTPUT &
(2) POWER SUPPLY CAPACITOR LINEARITY AND 'S'
TO TP2& GND CURVE BALANCE
AROUND 10.7MHz
2 87.35MHz FM SIGNAL TP1& GND TP4 & TP5 ADJUST L202 FOR PVC AT LOW END
GENERATOR MOD AND GND 87.35MHz FREQ
22.5KHz/1KHz
3 108.5MHz SAME AS STEP 2 SAME AS SAME AS ADJUST PVC FC2 PVC AT HIGH END
STEP 2 STEP 2 FOR 108.5MHz FREQ
4 REPEAT 2,3 FOR
BEST RESULTS
5 90MHz SAME AS STEP 2 SAME AS SAME AS ADJUST L201 FOR TUN PVC TO
STEP 2 STEP 2 MAX OUTPUT RECEIVE SIGNAL
6 106MHz SAME AS STEP 2 SAME AS SAME AS ADJUST PVC FC1 SAME AS
STEP 2 STEP 2 FOR MAX OUTPUT STEP 5
7 REPEAT5, 6 AND
THEN REPEAT 2,3,5,6
FOR BEST RESULTS
8 98MHz 1.FM SIGNAL SAME AS STEP2 CHECK WHETHER FM STEREO
GENERATOR TP7 & TP8 THE STEREO LED ON POSITION
SEV 75KHZ AND GND MUST BE ON
1KHZ W/STEREO VCO FREQ:76KHz
2. 2-CH.V.T.V.M
3. OSCILLOSCOPE
4. DC POWER
SUPPLY
C.E.C BELSON/DPTO.TECNICO/MOD:BSA-1061/Ed.01
6
BSA-1061
ALIGNMENT PROCEDURE
ALIGMENT INSTRUCTIONS
MW SECTION
STEP ALIGN TEST EQUIPMENT SIGNAL IN SIGNAL OUT ALIGNMENT REMARK
FREQ
465KHz (1)AM IF SWEEP MW ANT. COIL TP4 & TP5 ADJUST T202 (1)MW POSITION
1 &455KHz GENSCOPE CLOSE TO AND GND FOR MAX OUTPUT (2)PVC AT HIGH
(2)LOOP ANT LOOP ANT. AROUND 465 KHz & END
(3)POWER SUPPLY 455KHz
520KHz (1)LOOP ANT. RADIATE 60CM TP4 & TP5 ADJUST L205 FOR (1)MW POSITION
2 (2) AM SIGNAL APART FROM AND GND 520KHz (2)PVC AT LOW
GENERATOR TEST UNIT
MOD.1KHz 30%
1620KHz SAME AS STEP 2 SAME AS SAME AS ADJUST PVC C2 (1)MW POSITION
3 STEP 2 STEP 2 1620KHz (2)PVC AT HIGH
END
4 REPEAT 2,3 FOR
BEST
5 600KHz SAME AS STEP2 SAME AS SAME AS ADJUST L2 FOR (1)MW POSITION
STEP 2 STEP 2 MAX OUTPUT (2)TUNE PRC TO
RECEIVE SIGNAL
6 1400KHz SAME AS STEP 2 SAME AS SAME AS ADJUST PVC C1 SAME AS
STEP 2 STEP 2 FOR MAX OUTPUT ABOVE
7 REPEAT 5,6, AND
THAN REPEAT 2,3,5.6
FOR BEST RESULTS
C.E.C BELSON/DPTO.TECNICO/MOD:BSA-1061/Ed.01
7
BSA-1061
VOLTAGE CHARTS
IC VOLTAGE TABLE
{NO SIGNAL INPUT (EXCEPT FM STEREO BAND),VOLUME MINMUN}
MODEL : NE-291(2-3W-REM)
IC306 PINS 1 2 3 4 56789101112
TA8227P 16 8 0 0 0.5 000.5 8 15 8 16
IC 304 PINS 1 2 3 4 567891011121314
TC4013BP 6.2 00 0 00006.5 006.5 0 6.5
IC202 PINS 1 2 3 4 56789101112131415161718192021222324
TA2111P FM 0.8 0 0.3 6 0 6.1 5.6 5.9 0 0 4.6 5.4 1.3 1.3 5.4 5.3 0.7 0.9 0.3 6.1 6.1 6.6 6.1 6.1
AM 001.1 6.8 0.5 6.6 6.1 6.8 005.3 6.3 1.3 1.3 6.1 6.8 0.7 1.4 1.4 6.8 6.8 6.8 6.8 6.8
PINS 1 2 3 4 56789101112131415
U201 8 0 2.5 2.5 3.6 3.6 0 0 0 3.5 3.5 2.5 2.5 5 7.3
LA6541D PINS 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
8 4.8 2.5 2.5 3.5 3.5 0 0 0 3.6 3.6 2.5 2.5 2.5 8
123 4 5678910111213141516
2.9 0.9 2.7 2.7 2.6 2.6 2.6 2.7 0 2.7 2.7 2.7 2.7 2.7 2.7 0
U101 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.5 2.5 1.6 0
LA9242M 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
000 0 0002.755002.7002.7
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
0 2.4 0 0 0 2.7 0 5 5 2.7 2.7 0 0 2.7 0 0
123 4 5678910111213141516
U301 0 0 0.2 1.1 5 2 0 2.5 2.4 0 2.6 2.6 0 0 0 5
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
52.60 0 040000052.505 5
LC78601RE 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
2.9 2.8 2.9 0.9 0.9 0 0 2.8 2.8 5 5 0 0.1 0.1 0 0
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
500 0 022402002.555 0
PINS 1 2 3 4 56789101112131415161718
IC2 2.1 2.1 2.1 2.1 2.1 2.8 2.3 2.1 2.6 2.4 2.4 2.4 2.4 2.6 1.8 1.8 0.5 1
SC3610 PINS 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
0 1.5 4.6 4.6 4.6 4.6 4.6 4.3 0 0 0 000 3.3 0 1.6 5.2
IC 302 PINS 1 2 3 4 5678910111213141516
PT2249 0 0 0 0 00000000003.16.2
IC 305 PINS 1 2 3 4 5678910111213141516
PT2253A 0 3.3 3.3 3.3 0 0 6.6 6.6 6.6 6.6 3.3 0 3.3 3.3 3.3 6.6
Q303 E B C Q304 E B C Q306 E B C Q219 E B C
9014 0.7 1.4 0.9 9014 6.2 6.8 14 A928 17 16 17 8050 8 0.1 7.9
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