Panasonic RF-562DGU User manual

Order No. MD0401005C3
FM-AMPORTABLE RADIO
RF-562DGU / RF-562DGC
Colour
(K)... Black
SPECIFICATIONS
Specification
RADIO
FrequencyRange
FM 88-108 MHz
MW 530-1605 kHz
SW 4.75-18 MHz
Power Requirement Battery; 3V, twoUM-1(R20/LR20)
batteries
Speaker 8 cm
Power output 800 mW(RMS max)
Jack
Output Earphone
Dimensions(WxH x
D) 210 x120 x65 mm
Weight 650 g(without batteries)
Notes:
1. Design and specificationsaresubject to changewithoutnotice.
2004 PanasonicAVCNetworks Singapore Pte. Ltd. All rights
1

reserved. Unauthorized copying and distribution isaviolation of
law.
1. Operating Instructions
1.1. Location of control
1. Speaker
2. Telescopicantenna
FM :Pull out the telescopicantenna and adjust its length and
anglefor optimum reception.
MW :The sensitive ferrite core antenna inside the unitwill provide
excellent MW reception inmost areas. For optimum reception,
turn the unitinthe direction which gives the best results, since
the ferrite core antenna isdirectional.
SW :Extend the telescopicantenna fullyand keep itvertical.
3. Tuning control
4. Earphone jack
-Avoidlistening for prolonged periods of time to prevent
hearing damage.
-The speaker isautomaticallycut off when an earphone is
connected.
5. On-off/volume control switch
Turn clockwise to switch the radioon, and adjust the volume level.
6. Batterycompartment
2. Disassembly and Main Component Replacement
Procedures and Operational Check
“ATTENTION SERVICER”
Some chassis components maybe have sharpedges. Be careful whendiassembling and
servicing.
2

1. Thissection describes procedures for checking the operation of
the major printed circuitboards and replacing the main
components.
2. For reassemblyafter operation checks or replacement, reverse
the respective procedures. / Special reassemblyprocedures are
described onlywhen required.
3. Select items from the following index when checks or
replacement are required.
Content
-Checking Procedure for MainP.C.B.
2.1. Checking Procedure for MainP.C.B.
Step1 : Remove the BatteryCover.
Step2 : Remove all the screws.
Step3 : Remove the rearcabinet as arrowshown.
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Step4 : Remove the Volume Knob.
Step5 : Remove all the screws.
3. Notes of Schematic Diagram
(All schematic diagrams maybe modifiedat anytime withthe development of the new
technology)
Note:
SW1
:BAND switch
VR1
:VariableResistor
-The voltage value and waveforms are the reference voltage of this
unitmeasured byDC electronicvoltmeter (high impedance) and
oscilloscope on the basisof chassis. Accordingly, there mayarise
some error involtage values and waveforms depending upon the
internal impedance of the tester or the measuring unit.
< > :FM
-Importance safetynotice :
4

Components identified bymark have special characteristics
important for safety. Furthermore, special parts which have
purposes of fire-retardant (resistors), high-qualitysound
(capacitors), low-noise (resistors), etc. are used. When replacing
anyof components, be sure to use onlymanufacturer's specified
parts showninthe parts list.
Caution !
IC, LSI and VLSI are sensitive tostatic electricity.
Secondarytrouble canbe preventedbytaking care during repair.
-Cover the parts boxes made of plastics with aluminium foil.
-Put aconductive mat on the work table.
-Ground the soldering iron.
-Donot touch the pins of IC, LSI or VLSI with fingers directly.
4. Schematic Diagram
5. Printed Circuit Board
6. Wiring Connection Diagram
7. Measurements and Adjustments
7.1. Tuner Section
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
1. Set volumecontrol to maximum.
2. Set band switch to MW, SW, AMand FM.
3. Set function selector to radio.
4. Set finetunning to centre.
5. Set power source voltageto 6VDC.
6. Outputofsignal generator should beno higher than necessaryto obtain an outputreading.
MW-RFALIGNMENT
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READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
1. Set volume control to maximum.
2. Set band switch to MW, SW, AM and FM.
3. Set function selector to radio.
4. Set fine tunning to centre.
5. Set power source voltage to 6V DC.
6. Output of signal generator should be no higher than necessary to obtain an output reading.
MW-RF ALIGNMENT
Signal Generator or Sweep
Generator
Radio Dial
Setting
Indicator (Electronic
Voltmeter or
Oscilloscope)
Adjustment
(Shown in
Fig.1)
Remarks
Connections Frequency
Fashion a loop of
several turns of
wire and radiate a
signal into loop
ant. of receiver.
511 kHz (GU)
514 ± 3 kHz
(GC)
Tuning
capacitor fully
closed.
Output meter across
voice coil.
L8 (MW OSC
MIN)
Adjust for
maximum
output.
Fashion a loop of
several turns of
wire and radiate a
signal into loop
ant. of receiver.
1,650 kHz (GC)
1639 ± 5 kHz
(GU)
Tuning
capacitor fully
open.
Output meter across
voice coil.
CT2 (MW
OSC MAX)
Adjust for
maximum
output.
Fashion a loop of
several turns of
wire and radiate a
signal into loop
ant. of receiver.
550 kHz Tune to signal. Output meter across
voice coil.
[*1] L3 (MW
ANT Coil)
Adjust for
maximum
output.
Adjust L3
by
moving
coil
bobbin
along
ferrite core.
Fashion a loop of
several turns of
wire and radiate a
signal into loop
ant. of receiver.
1,500 kHz Tune to signal. Output meter across
voice coil.
CT1 (MW
ANT MAX)
Adjust for
maximum
output.
Repeat
steps
(2) ~ (5).
SW-RF ALIGNMENT
8

Signal Generator or Sweep Generator Radio Dial
Setting
Indicator (Electronic
Voltmeter or
Oscilloscope)
Adjustment
(Shown in
Fig.1)
Remarks
Connections Frequency
Fashion a loop of
several turns of wire
and radiate a signal
into loop ant. of
receiver.
4.7 MHz Tuning
capacitor
fully closed.
Output meter across
voice coil.
L9 (SW OSC
MIN)
Adjust for
maximum
output.
Fashion a loop of
several turns of wire
and radiate a signal
into loop ant. of
receiver.
18.5 MHz Tuning
capacitor
fully open.
Output meter across
voice coil.
CT5 (SW
OSC MAX)
Adjust for
maximum
output.
Fashion a loop of
several turns of wire
and radiate a signal
into loop ant. of
receiver.
4.8 MHz Tune to
signal.
Output meter across
voice coil.
L4 (SW ANT
MIN)
Adjust for
maximum
output.
Fashion a loop of
several turns of wire
and radiate a signal
into loop ant. of
receiver.
18.0 MHz Tune to
signal.
Output meter across
voice coil.
CT6 (SW ANT
MAX)
Adjust for
maximum
output.
Repeat
steps
(6) ~ (9)
AM-IF ALIGNMENT
Signal Generator or Sweep
Generator
Radio Dial Setting Indicator (Electronic
Voltmeter or
Oscilloscope)
Adjustment
(Shown in
Fig.1)
Remarks
Connections Frequency
Fashion a loop of
several turns of
wire and radiate a
signal into loop
ant. of receiver.
455 kHz 30
percent Mod.
at 400 Hz
Point of non-
interference. (on/
about 600 kHz)
Output meter across
voice coil.
T2 (AM IF) Adjust for
maximum
output.
[*1] Cement antenna bobbin with wax after completing alignment.
FM-IF ALIGNMENT
9

Signal Generator or Sweep
Generator
Radio Dial Setting Indicator (Electronic
Voltmeter or
Oscilloscope)
Adjustment
(Shown in
Fig.1)
Remarks
Connections Frequency
High side thru.
0.001Micro Farad to
test point TP3.
Negative side to test
point TP2.
10.7 MHz
(SWP)
Point of non-
interference. (on/
about 90 MHz)
Connect vert. amp. of
scope to test point
TP4. Negative side to
test point TP2.
T1 (FM-IF) [V] Adjust for
maximum
amplitude.
(Refer to
fig.
3).
High side thru.
0.001Micro Farad to
test point TP3.
Negative side to test
point TP2.
10.7 MHz
(SWP)
Point of non-
interference. (on/
about 90 MHz)
Connect vert. amp. of
scope to test point
TP5. Negative side to
test point TP4.
T3 (FM-IF) Adjust for
maximum
amplitude.
(Refer to
fig.
2).
FM-RF ALIGNMENT
Signal Generator or Sweep Generator Radio Dial
Setting
Indicator (Electronic
Voltmeter or
Oscilloscope)
Adjustment
(Shown in
Fig.1)
Remarks
Connections Frequency
Connect to test
point TP1 through
FM dummy antenna.
Negative side to test
point TP2.
86.2 MHz (GU)
87.35 MHz ± 50
kHz (GC)
Variable
capacitor
fully closed.
Output meter across
voice coil.
L2 (FM OSC
MIN)
[*2] Adjust
for
maximum
output.
Connect to test
point TP1 through
FM dummy antenna.
Negative side to test
point TP2.
109.2 MHz (GU)
108.28 MHz ± 70
kHz (GC)
Variable
capacitor
fully open.
Output meter across
voice coil.
CT4 (FM OSC
MAX)
CT9 must
be
prealign to
center
before
inserting
into
P.C.B..
Then [*2]
Adjust for
maximum
output.
Connect to test
point TP1 through
FM dummy antenna.
Negative side to test
point TP2.
106 MHz Tune to
signal.
Output meter across
voice coil.
CT3 (FM ANT
MAX)
[*2] Adjust
for
maximum
output.
Repeat
steps
(3) ~ (5)
[*2] Three output responses will be present; proper tuning is the center frequency.
ALIGNMENT POINT
* Please refer to Circuit Board and wiring Connection Diagram for test point locations.
10

DIALTHREADING
1. Remove chasisfrom cabinet (Refer to 2. Disassemblyand Main
Component Replacement Procedures and Operational Check)
2. Turn dial drum to fullycounter-clockwise. (Turn dial gear to fulley
clockwise.).
3. Route dial cord inordered character (1-6), turn 3times at Tuning
Shaft.
4. Cement dial cord ends.
DIALTHREADING
1. Turn dial drum to fullycounter-clockwise. (Turn dial drum to fully
clockwise.)
2. Set dial pointer to start point (0) of dial scale.
3. Attach dial cord to dial pointer.
8. Type Illustrations of ICs, Transistors & Diodes
9. Parts Location and Replacement Parts List
Notes:
-Important safetynotice:
Components identified bymark have special characteristics
important for safety.
Furthermore, special parts which have purposes of fire-retardent
(resistors), high-qualitysound (capacitors), low noise (resistors),
etc are used.
When replacing anyof these components, be sure to use only
manufacturer’sspecified parts showninthe parts list.
9

-The parenthesized indications inthe Remarks columns specifythe
areas or colour. (Refer to the cover page for area or colour)
Parts without these indications can be used for all areas.
-Capacitor values are inmicrofarads ( F) unless specified
otherwise, P= Pico-farads (pF), F= Farads.
-Resistance values are inohms, unless specified otherwise, 1K=
1,000 (OHM).
-The marking (RTL) indicates that the Retention Time islimited for
thisitems. After the discontinuation of thisassemblyin
production, the item will continue to be availablefor aspecific
period of time. The retention period of aavailabilityisdependent
on the type of assembly, and inaccordance with the laws
governing part and product retention. After the end of thisperiod,
the assemblywill no longer be available.
-[M] markings inthe Remarks columns indicates parts supplied by
PAVCSG.
-Reference for O/I book languages are as follows:
Ar: Arabic Du: Dutch It : Italian Sp:
Spanish
Cf : CanadianFrenchEn: English Ko: Korean Sw:
Swedish
Cz : Czech Fr: French Po: Polish Co:
Traditional
Chinese
Da : Danish Ge : German Ru: Russian Cn:
Simplified
Chinese
Pe : Persian
9.1. Cabinet
9.1.1. Cabinet PartsLocation
10