CAUTION: Before servicing the chassis, read the "Important Service safety Information"
section on page 2 of this manual.
PORTABLE MW/FM RADIO WITH CASSETTE RECORDER
T
SOP
A
P
SPECIFICATIONS CONTENTS
MW/FM TUNER SECTION
ANTENNA SYSTEM
TUNING RANGE
INTERMEDIATE FREQUENCY
AUDIO SECTION
SPEAKER IMPEDANCE
GENERAL
POWER INPUT
AC POWER CONSUMPTION
MW: FERRITE BAR
FM: TELESCOPIC
MW: 530~1500KHz
FM: 64~108KHz
MW: 455KHz +/-5KHz
FM: 10.7MHz +/-0.1MHZ
8 ohms
AC 230V, 50Hz
14W DC 12V
IMPORTANT SERVICE SAFETY INFORMATION
DISASSEMBLY INSTRUCTIONS
ALIGNMENT PROCEDURES
LOCATION OF CONTROLS
WIRING DIAGRAM
BLOCK DIAGRAM
IC BLOCK DIAGRAM
PRINTED CIRCUIT BOARDS
SCHEMATIC DIAGRAMS
EXPLODED VIEW
EXPLODED PARTS LIST
REPLACEMENT PARTS LIST
2
3
4
5
6
7
8-10
11-15
16-17
18
19
20-23
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 t 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 unit 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.
c.
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.), 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 HERENIN INDICATE A POTENTIAL
SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE
RETURNING THE UNIT TO THE CUSTOMER.
(READING SHOULD
NOT BE ABOVE
0.5mA)
AC Leakage Test
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 the jumpered AC
plug and each exposed metallic cabinet part on the unit, such as
screwheads, 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.
TEST ALL
EXPOSED METAL
SURFACES
+
LEAKAGE
CURRENT
TESTER
EARTH
GROUND
ANTENNA
TERMINAL
EXPOSED
METAL
PART
2.
PRODUCT SAFETY NOTICE
OM
OHMMETER
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 does 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.
SERVICING PRECAUTIONS
3.
CAUTION”Before servicing the unit covered by this service manual
and its supplements read and follow the SAFETY PRECAUTIONS on
this page. NOTE”If unforeseen circumstances create a conflit
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 electrolytic
capacitor in the unit.
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 of 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.
LASER PRECAUTIONS
4.
WARNING!!
When servicing, (in case it is necessary to confirm Laser Beam
1.
Emission) be sure not to place your eyes any closer than 1 ft or
30cm from the surface of the Objective Lens on the Opticval
Pickup Block.
HANDLING THE LASER PICKUP
2.
Laser diodes are extremely susceptible to damage from static
electricity. Even if a static discharge does 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
DISASSEMBLY INSTRUCTIONS
1) ROTATE THE UNIT TO EXPOSE THE BACK SIDE.
2) REMOVE THE 8 SCREWS AS SHOWN IN FIG.1.
FIG.1
3
ALIGNMENT PROCEDURES
AM I.F. ALIGNMENT
1. Set the POWER BUTTON to POWER"ON".
2. Set the FUNCTION SELECTOR SWITCH to RADIO & AM BAND.
3. Connect a SWEEPSCOPE OUTPUT to AM antenna terminal.
4. Connect a SWEEPSCOPE INPUT to pin16 or pin17 of IC001 through a 1uf capacitor and ground.
STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR
1 455KHz GANG OPEN T003(AM IF)
AM R.F. ALIGNMENT
1. Connect an RF generator to a standard radiating loop.
2. Connect a SCOPE and VTVM across the speaker output.
STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR
1 530KHz GANG CLOSED T001 (AM OSC COIL)
2 1500KHz GANG OPEN CT003 (AM OSC TRIM.) MAXIMUM
3 600KHz 600KHz L004 (AM ANT COIL) OUTPUT
4 1400KHz 1400KHz CT004 (AM ANT TRIM.)
5 REPEAT STEPS 3 AND 4 TO OBTAIN BEST TRACKING.
FM I.F. ALIGNMENT
1. Set the POWER SWITCH to POWER "ON".
2. Set the FUNCTION SELECTOR to RADIO & FM BAND.
3. Connect a SWEEPSCOPE OUTPUT to pin5 of IC001 through a 20pF capacitor and ground.
4. Connect a SWEEPSCOPE INPUT to pin16 or pin17 of IC001 through a 1uf capacitor and ground.
STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR
1 10.7MHz GANG OPEN
T002 (FM IF T)
CENTER
& MAXIMUM OUTPUT
WITH 10.7MHz AT
ZERO CROSSOVER
FM R.F. ALIGNMENT
1. Connect an RF generator to the FM antenna terminal and ground.
2. Connect a SCOPE & VTVM across the speaker output.
STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR
1 64MHz GANG CLOSED L003 (FM OSC COIL)
2 108MHz GANG OPEN CT002 (FM OSC TRIM.) MAXIMUM
3 90MHz 90MHz L002 (FM RF COIL) OUTPUT
4 106MHz 106MHz CT001 (FM RF TRIM)
5 REPEAT STEPS 3 AND 4 TO OBTAIN MAXIMUM OUTPUT.
CASSETTE ALIGNMENT
1. Set the FUNCTION SELECTOR SWITCH TO TAPE.
2. Connect a Scope & VTVM across the speaker output.
3. Insert the 8KHz tape in to scassette deck and push play BUTTON.
4. ADJUST HEAD for speaker maximum output.
SCREWDRIVER
ADJUSTING
SCREW
CD ALIGNMENT
Auto alignment.
MOTOR
SCREWDRIVER
4
TA2111 N
FM/AM IF
AM 'RF
FM 'RF
BLOCK DIAGRAM
TUNER
TAPE
6
DECK
THL-21VB
CD MECH
SONY
KSM-213CDM
PRE. AMP
BA3308
CD
TC94A29F
TA2157FN
SA1469PH
LCD
DISPLAY
POWER AMP
UTC1316
SASS
BOOST
POWER SUPPLY
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