Panasonic RC-Q500 User manual

OrderNo. MD0005083C2
FM-LWDigital Clock Radio
RC-Q500
Colour
(S)..........SilverType
EP....East Europe
SPECIFICATIONS
RADIO
FrequencyRange
FM 65-108 MHz
LW 148.5-285 kHz
IntermediateFrequency
LW 459 kHz
FM 10.7MHz
Sensitivity
FM 15 dB/50 mW
LW 56 dB/m/50 mW
GENERAL
Power requirement
AC 230 -240 V, 50 Hz
Power consumption 5W
Memoryback-up batteryfor
clock 9V(6F22/6LR61, S-006P)
Power output 300 mW(RMS...Max.)
Speakers 8cm (16 )
Dimensions(WxHxD) 231 x60 x153 mm
Weight 689 g withoutbatteries
Notes:
1. Weight and dimensionsshownareapproximate.
2. Design and specificationsaresubject to changewithout notice.

2000 Matsushita Electronics (S)Pte. Ltd. All rights reserved.
Unauthorizedcopying and distribution isaviolation oflaw.
1. Operation Checks and MainComponent
ReplacementProcedures
“ATTENTION SERVICER”
Some chassis components maybe have sharpedges. Be careful whendiassembling and
servicing.
1. Thissection describes theprocedures for checking theoperation
ofthemajor printedcircuitboardsand replacing themain
components.
2. For assemblyafteroperation checks or replacement, reverse the
respectiveprocedures.
Special reassemblyprocedures aredescribedonlywhenrequired.
3. Select itemsfrom thefollowing index whenchecks or
replacementarerequirements.
-Checking Procedurefor eachmajor P.C.B.
...................................................................................................... P.g. 2
-Howtoset adial pointer
.....................................................................................................................
.
P.g. 3
1.1. Checking Procedurefor eachmajor P.C.B.

Step1 Remove 6 screws.
Step2 Remove the volume knob.
Step3 Remove the top cabinetinthe direction of arrow
Step4 Release the 2 claws inthe direction of arrow.

Step5 Remove CP1 bypressing downthe connector.
Note:Please switchAL1 and AL2 to the left side whenassemble back the set.
1.2. Howtoset adial pointer
Step1 Install the dial pointerand align the pointerto the “0”point as shownabove.

Step2 Install the tuning knob as shownabove.
Note:Turnthe tuning knob to the extreme left wheninstalling.
2. Measurementsand Adjustments
2.1. ALIGNMENTINSTRUCTIONS
READ CAREFULLYBEFOREATTEMPTINGALIGNMENT
1. Setpowersource voltage to 230 VAC.
2. Setvolume control to maximum.
3. Setband switchto FMorLW.
4. Setmode selectorto RADIO.
5. Output of signal generatorshouldbe no higherthannecessaryto obtainanoutput reading.
-AM-IFALIGNMENT
Signal GeneratororSweep
Generator RadioDial Setting Indicator (Electronic
Voltmeteror
oscilloscope)
Adjustment
(ShowninFig.1)
Remarks
Connections Frequency
Fashion a loop of
several turns of
wire and radiate
signal into loop of
receiver.
455 kHz30%
Mod. at400 Hz Point of non- interference. (on/
about 150 kHz)
Connectvert.
amp. of scope to
testpoint TP3.
Negative side to
testpoint TP2.
T51 (LWIFT)
Adjust
maximum
output.
-LW-RFALIGNMENT

Signal GeneratororSweepGenerator RadioDial
Setting Indicator (Electronic
Voltmeteror
oscilloscope)
Adjustment
(ShowninFig.1)
Remarks
Connections Frequency
Fashion a loop of
several turns of
wire and radiate
signal into loop of
receiver.
136 kHz Tuning
capacitorfully
closed.
Connectvert.
amp. of scope to
testpoint TP3.
Negative side to
testpoint TP2.
L54 (LWOSC
Coil)
Adjust
maximum
output.
297 kHz Tuning
capacitorfully
opened.
CT1 (LWOSC
Trimmer)
136 kHz Tune to signal [*1]L55 (LW
ANTCoil)
Adjust
maximum
output.
by
L5
moving
along
ferrite
297 kHz CT2 (LWANT
Trimmer)
Adjust
maximum
output.
[*1]Fix antenna coil with wax aftercompleting alignment
-FM-IFALIGNMENT
Signal GeneratororSweepGenerator RadioDial
Setting Indicator (Electronic
Voltmeteror
oscilloscope)
Adjustment(Shown
inFig.1)
Remarks
Connections Frequency
Connectto test
point TP3 through
ceramic capacitor.
Negative side to
testpoint TP2.
10.7 MHz(Sweep) Point of non-
interference.
(on/about 90
MHz)
Connectvert.
amp. of scope to
testpoint TP3.
Negative side to
testpoint TP2.
T50 (FM1st)
Waveform
shown
Fig.2.
T52 (FM2nd)
Waveform
shown
Fig.3.
[*2]Twooutput responses will be present; propertuning is the centerfrequency.
-FM-RFALIGNMENT

Signal GeneratororSweepGenerator RadioDial
Setting Indicator (Electronic
Voltmeteror
oscilloscope)
Adjustment(Shown
inFig.1)
Remarks
Connections Frequency
Connectto test
point TP18 through
FMdummy
antenna. Negative
side to testpoint
TP2.
63.7 MHz Variable
capacitorfully
closed.
Connectvert.
amp. of scope to
testpoint TP3.
Negative side to
testpoint TP2.
L53 (FMOSC
Coil) [*
2]
for
output.
109.2 MHz Variable
capacitorfully
opened.
CT50-1 (FMOSC
Trimmer)
104 MHz Tune to signal. CT50-2 (FMANT
Trimmer)
[*2]Three output response will be present; propertuning is the outerfrequency.
-BATTERY BACK-UP CIRCUITADJUSTMENT(NOTE:Disconnect AC
powercord)
DC PowerSupply Frequency
Counter Adjustment Point Remarks
Connections Voltage
(+)
Side...TP5
(-)
Side...TP4
9 V (+)Side...TP9 (-)
Side...TP10 VR1 AdjustVR3 for2400 ±15 Hzon
frequency
counterreading. [*3, 4, 5]
[*3]Connect1 pF capacitorto the test
point TP9.
[*4]Amplifyits output signal byusing AF
Amp.
[*5]Measure the frequency.
-FMDATAMEASUREMENT
Note:The FMIC (Mixer)has to be isolatedfrom the
antenna whendoing FMmeasurement.
1. De-solderedoneconnection of coupling capacitorthat isconnectedto
the antenna
2. Input the signal directlyto the coupling capacitor.
3. Solderback the capacitorafterthe data has beentaken
2.2. AlignmentPoints

3. Type Illustration ofIC’s, Transistors and Diodes
4. Wiring Connection Diagram

5. Terminal Functions ofICs
-IC1(LM8652) Clock LSI

Pin
No. Mark I/ OFunction
1~13 Segment
signal output O Output terminals for segment drive signals
14 Colon output — Not used
15 Vss I Powersupplyinput
16 CR OSC O Outputs anoscillating
signal source necessary
forthe time base during
back-up operation and
operates the time counter.
Alsofunctions as analarm
tone signal (OSC
frequency=2.4 kHz)
17 SPEED/
POWER I Vss forAC operation.
18 DC OUTPUT O Whenradioon signal is
receivedorgenerates at
IC1, this pinwill send a
high signal to the radio+B
voltage control circuit(Q1).
19,20 19...ALARM1
OUTPUT
20...ALARM2
OUTPUT
OOutputs analarmsignal
(“H”level)whenalarm
time matches the current
time. Whenthis pinis
momentarilygrounded
(VDD)the alarmoutput
stops.
21 ALARM
DISPLAY IWhena high signal is appliedto this pin, the
contents of alarm2 is
displayedand the setting
input is enabled. Whena
lowsignal is applied, the
above applies insteadto
alarm1.
22 TIMESET
INPUT IApplying a signal to this pincauses the value of the
current time of alarmtime
to increment. Ifthe input
voltage is Vss, the time
decreases. Ifthe input
voltage is VDD, the time
increases. Ifthe input
voltage is a pulse
signal(causedby
depressing the switched
S10), the speedincreases.

S10),
the
speed
increases.
Pin
No. Mark I/ OFunction
23 ON/OFF I Byturning on S5, the input
is VSS (high signal)and
the mode switches to
Radioon mode. Byturning
on S4, the input is VDD
(lowsignal)and the mode
is nowswitchto the Radio
off mode.
24 SLEEP/DOZE I Byturning on S3, the input
is VSS (high level)and the
mode switches to sleep
mode. Byturning on S2,
the input is VDD (low
signal)and the mode is
nowswitchto the doze
mode.
25 50/60 Hz
INPUT I Input terminal fornoise filtercircuit.
26 MODE I Terminal to input mode
selection VDD:12-hour, 60
HzOPEN:12-hour, 50 Hz
VSS:24-hour, 50 Hz
27 TIMESET I Input terminal fortime
setting and dinner
adjustment modes. VSS:
Dimmer(Timerlock)OPEN:
Bright (Time lock)VDD :
bright (Time set)
28 VDD — Ground terminal.
6. SchematicDiagram
(All schematic diagrams maybe modifiedatanytime with the development of newtechnology.)
Notes:

SW2: DOZESWITCH
SW3: SLEEP SWITCH
SW4: POWER/TIMESETSWITCH
SW5: RADIOON SWITCH
SW6: ALARM1 DISPLAYSWITCH
SW7: ALARM2 DISPLAYSWITCH
SW8: TIMESETFWD SWITCH
SW9: TIMEREVERSE SWITCH
SW10:TIMESETFASTSWITCH
SW11:RADIO/OFF SWITCH
SW12:BUZZER/OFF SWITCH
SW50:BAND FM/LWSWITCH
VR50: VOLUMECONTROL VR
Batterycurrent: /
-Volumeminimum
24.2mA(Radio)
-Volumemaximum
30.9mA(Radio)
Measurement Instruction:
RADIO: AM-74 dB/m, 30%Mod; FM-60 dB/m, 30%Mod.
-Thevoltagevalueand waveformsarethereference voltageofthis
unitmeasuredbyDC electronicvoltmeter(high impedance) and
oscilloscopeon thebasisofchassis. Accordingly, theremayarise
someerror involtagevalues and waveformsdepending upon the
internal impedance ofthetesteror themeasuring unit.
<> :FM NoMark :Clock
-Importance safetynotice:
Components identifiedbymarkhavespecial characteristics
importantfor safety. Furthermore, special parts whichhave
purposes offire-retardant(resistor), high-qualitysound
(capacitors), low-noise (resistor), etc. areused. Whenreplacing
anyofcomponents, besuretouse onlymanufacturer’sspecified
parts shownintheparts list. /
Caution !
IC, LSI and VLSI aresensitivetostaticelectricity.
Secondarytroublecanbepreventedbytaking careduring repair.
-Covertheparts boxes madeofplastics withaluminium foil.
-Putaconductivemat on theworktable.

-Ground thesoldering iron.
-DonottouchthepinsofIC, LSI or VLSI withfingersdirectly.
7. Printed CircuitBoard
(This printedcircuitboarddiagrammaybe modifiedatanytime with the development of new
technology.)
8. PartsLocation and ReplacementPartsList
Note:
-Importantsafetynotice:
Components identifiedbymarkhavespecial characteristics
importantfor safety.
Furthermore, special parts whichhavepurpose offire-retardant
(resistors), high-qualitysound (capacitors), low-noise (resistors),
etc. areused.
Whenreplacing anyofthese components, besuretouse only
manufacturer’sspecifiedparts shownintheparts list.
-TheparenthesizedindicationsintheRemarks columnsspecifythe
areas or colour. (Refertothecoverpagefor area or colour)
Parts withoutthese indicationscanbeusedfor all areas.
-Capacitor values areinmicrofarads( F)unless specified
otherwise, P=Pico-farads(pF), F=Farads.
-Resistance valueareinohms, unless specifiedotherwise, 1K=
1,000 (OHM).
-Themarking (RTL)indicates that theRetention Timeislimitedfor
thisitem. Afterthediscontinuation ofthisassemblyinproduction,
theitemwill continuetobeavailablefor aspecificperiod oftime.
Theretention period ofavailabilityisdependanton thetypeof
assembly, and inaccordance withthelawsgoverning partand
product retention. Aftertheend ofthisperiod, theassemblywill
no longerbeavailable.
-[M] Indicates intheRemarks columnsindicates parts suppliedby
MESA.
-The“(SF)”markdenotes thestandard part.
-Reference for O/I booklanguages areas follows:

Ar:Arabic Cf :CanadianFrench Cz :Czech Da:Danish
Du:Dutch En :English Fr :French Ge:German
It :Italian Ko :Korean Po :Polish Ru:Russian
Sp:Spanish Sw:Swedish Co :Traditional
Chinese Cn:Simplified
Chinese
8.1. Cabinet
8.1.1. Cabinet Parts Location

8.1.2. Cabinet Parts List
Ref. No. PartNo. PartName& Description Remarks
CABINETAND CHASSIS
1RKMX0004D-S TOPCABINET [M]
2RKSX0004V-S BOTTOMCABINET [M]
3RAS8P03-U SPEAKER [M]
4RGBX0005-S SLIDEKNOB [M]
5RGJX0004-D POINTER [M]
6RGUX0011-H TIMESETBUTTON [M]
7RGWX0006-S VOLUMEKNOB [M]
8RGXX0005-H TUNING KNOB [M]
10 RKWW0004F-S DIALSCALEPANEL [M]
11 RUQ50ZA SPEAKER SPRING [M]
12 SJT777 TERMINALLUG [M]
13 XTV3+12G SCREW [M]
14 XYN26+C8 SCREW [M]
15 4HCR21532 LED DISPLAY [M]
8.2. Electrical Parts List
Ref. No. PartNo. PartName& Description Remarks
P.C.B.
REPT0006A MAIN P.C.B. [M]
INTEGRATED CIRCUITS
IC1 LM8562 IC CLOCK LSI [M]
IC50 TA8164P IC TUNER [M]
IC51 TA7368P IC POWER AMP [M]
IC100 TC74HC4060AP IC COUNTER/OSC [M]
TRANSISTORS
Q1 2SD734FAA TRANSISTOR [M]
Q2 2SC4641TAA TRANSISTOR [M]
Q4 2SD734FAA TRANSISTOR [M]
Q101 2SC4641TAA TRANSISTOR [M]
Q102 2SC4641TAA TRANSISTOR [M]
Q103 2SC4641TAA TRANSISTOR [M]
Q104 2SC4641TAA TRANSISTOR [M]
DIODES
D1 RVD1SR35TR DIODE [M]
D2 RVD1SR35TR DIODE [M]
D3 RVD1SR35TR DIODE [M]
D4 RVDMTZ10BTA DIODE [M]
D5 RVD1SS133TA DIODE [M]

Ref. No. PartNo. PartName& Description Remarks
D6 RVD1SS133TA DIODE [M]
D7 RVD1SS133TA DIODE [M]
D8 RVD1SS133TA DIODE [M]
D9 RVD1SS133TA DIODE [M]
D10 RVDMTZ6R8BTA DIODE [M]
D11 RVD1SS133TA DIODE [M]
D51 SVC251SPA-AC DIODE [M]
D101 RVDMTZ5R1BTA DIODE [M]
VARIABLERESISTORS
VR1 QVNB3A00B224 VARIABLERESISTOR [M]
VR50 EVJF8AF20A14 VARIABLERESISTOR [M]
VARIABLECAPACITOR
VC50 RCV4RDT0V-R VARIABLECAPACITOR [M]
SWITCHES
SW2 EVQ21405R SW DOZE [M]
SW3 EVQ21405R SW SLEEP [M]
SW4 EVQ21405R SW POWER/TIMESET [M]
SW5 EVQ21405R SW RADIO ON [M]
SW6 EVQ21405R SW ALARM1DISP/ADJ [M]
SW7 EVQ21405R SW ALARM2DISP/ADJ [M]
SW8 EVQ21405R SW TIMESETFWD [M]
SW9 EVQ21405R SW TIMESETREV [M]
SW10 EVQ21405R SW TIMESETFAST [M]
SW11 RSS2B035-B SW ALARM1 [M]
SW12 RSS2B035-B SW ALARM2 [M]
SW50 RSS2B019-B SW BAND [M]
CONNECTOR
CP1 RJS2T5ZA CONNECTOR [M]
COILS& TRANSFORMERS
L51 RLQY30S1W-F FMCOIL [M]
L53 RLD4Y54W-F FMOSC COIL [M]
L54 RL02B018-T AMOSC COIL [M]
L55 RLV1C001-0 LWBAR ANTCOIL [M]
T1 RTP1I2B003-G TRANSFORMER [M]
T50 RLI4B153-T TRANSFORMER [M]
T51 RLI2B009-T TRANSFORMER [M]
T52 RLI4B153-T TRANSFORMER [M]
CERAMIC FILTERS
CF50 RLFCCFA459 CERAMIC FILTER [M]
CF51 RLFFEHWN02ZT CERAMIC FILTER [M]
CX1 RSXD51K2S01 CRYSTAL [M]

Ref. No. PartNo. PartName& Description Remarks
WIRES
W2 RJC99029 WIRE [M]
RESISTORS
R1 ERDS2TJ122T 1.2K 1/4W [M]
R2 ERDS2TJ472T 4.7K 1/4W [M]
R3 ERDS2TJ222T 2.2K 1/4W [M]
R4 ERDS2TJ103T 10K 1/4W [M]
R5 ERDS2TJ103T 10K 1/4W [M]
R6 ERDS2TJ103T 10K 1/4W [M]
R7 ERDS2TJ103T 10K 1/4W [M]
R8 ERDS2TJ683T 68K 1/4W [M]
R9 ERDS2TJ562T 5.6K 1/4W [M]
R11 ERDS2TJ330T 33 1/4W [M]
R12 ERDS2TJ560T 56 1/4W [M]
R13 ERDS2TJ560T 56 1/4W [M]
R14 ERDS2TJ562T 5.6K 1/4W [M]
R15 ERDS2TJ222T 2.2K 1/4W [M]
R16 ERDS2TJ183T 18K 1/4W [M]
R17 ERDS2TJ395T 3.9M1/4W [M]
R18 ERDS2TJ223T 22K 1/4W [M]
R19 ERDS2TJ560T 56 1/4W [M]
R20 ERDS2TJ334T 330K 1/4W [M]
R50 ERDS2TJ270T 27 1/4W [M]
R51 ERDS2TJ392T 3.9K 1/4W [M]
R52 ERDS2TJ563T 56K 1/4W [M]
R53 ERDS2TJ223T 22K 1/4W [M]
R54 ERDS2TJ102T 1K 1/4W [M]
R55 ERDS2TJ104T 100K 1/4W [M]
R56 ERDS2TJ151T 150 1/4W [M]
R57 ERDS2TJ101T 100 1/4W [M]
R58 ERDS2TJ104T 100K 1/4W [M]
R59 ERDS2TJ820T 82 1/4W [M]
R60 ERDS2TJ102T 1K 1/4W [M]
R101 ERDS2TJ102T 1K 1/4W [M]
R102 ERDS2TJ222T 2.2K 1/4W [M]
R103 ERDS2TJ683T 68K 1/4W [M]
R104 ERDS2TJ472T 4.7K 1/4W [M]
R105 ERDS2TJ223T 22K 1/4W [M]
R106 ERDS2TJ330T 33 1/4W [M]
R107 ERDS2TJ223T 22K 1/4W [M]
R108 ERDS2TJ330T 33 1/4W [M]
R109 ERDS2TJ103T 10K 1/4W [M]
R110 ERDS2TJ106T 10M1/4W [M]
R111 ERDS2TJ474T 470K 1/4W [M]
R112 ERDS2TJ101T 100 1/4W [M]
CAPACITORS
C1 ECKR1H103ZF5 0.01 50V [M]
C2 ECKR1H103ZF5 0.01 50V [M]

Ref. No. PartNo. PartName& Description Remarks
C3 ECKR1H103ZF5 0.01 50V [M]
C4 ECEA0JU102B 1000P6.3V [M]
C5 ECEA1EU101B 100 25V [M]
C6 ECEA1CU330B 33 16V [M]
C7 ECEA1CU102E 1000P16V [M]
C8 ECEA1CU221B 220 16V [M]
C9 ECBT1H102KB5 1000P50V [M]
C10 ECBT1H102KB5 1000P50V [M]
C11 ECBT1C472MR5 4700P16V [M]
C12 ECBT1C472MR5 4700P16V [M]
C14 ECBT1E223ZF5 0.022 25V [M]
C15 ECEA1AU470B 47 10V [M]
C16 ECBT1C103NS5 0.01 16V [M]
C17 ECBT1H102KB5 1000P50V [M]
C18 ECBT1C103NS5 0.01 16V [M]
C19 ECBT1C103NS5 0.01 16V [M]
C20 ECQG1H152KZT 1500P50V [M]
C21 ECBT1H102KB5 1000P50V [M]
C22 ECEA1HU0R1B 0.150V [M]
C50 ECBT1H220J5 22 50V [M]
C51 ECBT1H390J5 39 50V [M]
C52 ECBT1H180JC5 18 50V [M]
C53 ECCR1H050DC5 550V [M]
C54 ECCR1H080DC5 850V [M]
C55 ECCR1H040CC5 450V [M]
C56 ECFR1C473MR 0.047 16V [M]
C57 ECBT1C122MR5 1200P16V [M]
C58 ECBT1H180JC5 18 50V [M]
C59 ECBT1C472MR5 4700P16V [M]
C60 ECKR1H151KB5 150 50V [M]
C61 ECEA1CU330B 33 16V [M]
C62 ECBT1C122MR5 1200P16V [M]
C63 ECEA0JU101B 100 6.3V [M]
C64 ECBT1C103NS5 0.01 16V [M]
C65 ECEA1HU0R1B 0.150V [M]
C66 ECBT1H102KB5 1000P50V [M]
C67 ECEA1AU470B 47 10V [M]
C68 ECEA1AU470B 47 10V [M]
C69 ECEA0JU221B 220 6.3V [M]
C70 ECEA0JU221B 220 6.3V [M]
C71 ECQP2A221JZT 220 100V [M]
C72 ECBT1H240J5 24 50V [M]
C73 ECBT1H560J5 56 50V [M]
C81 ECBT1H391KB5 390 50V [M]
C82 ECBT1H102KB5 1000P50V [M]
C83 ECBT1H221KB5 220 50V [M]
C84 ECBT1C122MR5 1200P16V [M]
C85 ECBT1H221KB5 220 50V [M]
C101 ECEA0JU101B 100 6.3V [M]
C102 ECBT1C122MR5 1200P16V [M]
C103 ECBT1E223ZF5 0.022 25V [M]
C104 ECBT1H220J5 22 50V [M]
C105 ECBT1H220J5 22 50V [M]
C106 ECBT1C122MR5 1200P16V [M]

Ref. No. PartNo. PartName& Description Remarks
C107 ECBT1C122MR5 1200P16V [M]
8.3. Packing Materials&Accessories Parts List
Ref. No. PartNo. PartName& Description Remarks
PACKING MATERIALS
P1 RPK1385 GIFT BOX [M]
P2 RPHW0001 PROTECTIVE PAD [M]
P3 XZB30X25A04 MIRAMAT [M]
ACCESSORIES
A1 RJA23YB-U AC CORD [M]
A2 RQTT0249-2E O/I BOOK [M]
8.4. Packaging

LM8562 2SD734FAA
2SC4641TAA
TA8164P
TC74HC4060AP
TA7368P RVD1SS133TA
RVD1SR35TR
RVDMTZ10BTA
RVDMTZ5R1BTA
Ca
A
Cathode
Anode
Ca
A
Cathode
Anode
SVC251SPA-AC
RVDTZ6R8BTA