Panasonic SV-MP720VGC User manual

TD0503017C3
Digital AudioPlayer
SV-MP720VGC / SV-MP720VGK / SV-MP720VGH / SV-
MP720VGD / SV-MP720VGN
Colour
(W)................... White Type
(K).................... Black Type
SPECIFICATIONS
Specifications
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Memorysize: 512 MB
Supportedsampling frequency:
/
MP3; 32 kHz, 44.1kHz, 48 kHz,
WMA; 8kHz to44.1kHz
Supportedbit-rates: MP38kbpsto320 kbps(128
kbpsisrecommend) WMA32
kbpsto192 kbps(96 kbpsis
recommend)
No. of channels: Stereo, 2channels(MUSIC, FM
RADIO), Mono 1channel (IC
RECORDER)
Frequencyresponse: 20 Hz to20,000 Hz (+0dB, -6dB)
(MUSIC), 300 Hz to4,300 Hz (IC
RECORDER,HQ mode)
MicS/N: 30 dB (IC RECORDER,HQ mode)
RadioFrequencyrange(FM): 87.9MHz to107.9MHz (200kHz
steps),87.5MHz to108.0MHz
(50/100 kHz steps),
Output: 4.5mW+ 4.5mW(16 ,M3
jack)
Power supply: DC 1.2V (onerechargeable
battery)
Approximateplaytimes: 10 hours (MUSIC),
5hours (FM RADIO)
Approximaterecording times: 9hours (IC RECORDER, HQ
mode)
5hours (FM RADIO)
Cabinet dimensions(WxHxD): 70.0x22.2x14mm
Mass: 36.2gwithbattery/ 23.5g
without battery
AC adaptirinput: AC110V ~ 240V,50 Hz/ 60 Hz
Power consumption instandby
mode: 0.2W
-Specificationsaresubject to changewithoutnotice.
-Theplaytimes shown depend on operating conditions.
-Mass and dimensionsareapproximate.
-MB meansonemillion bytes. Useablecapacitymaybeless.
-Thisproduct iscompatiblewith thefollowing character code. The
displaymaynotappear correctlywith other character codes.
-(When thesupplied rechargeablebatteryisfullycharged.)
2005 Matsushita ElectricTAIWAN Industrial Co., Ltd. All rights
reserved. Unauthorized copying and distribution isaviolation of
law.
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1. Accessories
-Stereo earphones
(L0BAB0000188) ............................................................. 1pc.
-USBCable
(K1HA05AD0003)............. ................................................ 1pc.
-Neck Strap
(RFAT0006-Q) ....................................................................1pc.
-CD-ROMDriver
(RFET0002) ...................................................................... 1pc.
-AC Adaptor
(N0JZCD000001) ...........................................................[GK].
(N0JZCD000002) ...........................................................[GD].
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(N0JZCD000003) ...........................................................[GC].
(N0JZCD000004) ...........................................................[GH].
(N0JZCD000005) ...........................................................[GN].
-BatteryAss’y
(ZBRP-BP65HE)................................................................1pc.
-BatteryCase
(RFCT0005-H) ............................................................ 1pc.
2. Supply of Rechargeable Battery as Replacement
Parts
-Please take note of the following points relating to Carrying Case
to be used for protection of RechargeableBatteryfrom shorting.
Replacement Parts:
-RechargeableBattery(ZBRP-BP65HE) to be supplied will be
provided with Carrying Case (RFCT0005-H).
-Noreplacement parts will be supplied for RechargeableBattery
without Case.
-Replacement parts will be supplied for Carrying Case (RFCT0005-
H)without RechargeableBattery.
-To your customers, deliveryRechargeableBatterytogether with
Carrying Case to prevent shorting accidents that mayoccur when
RechargeableBatteryiscarried about without Carrying Case.
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3. Caution in Use of Rechargeable Battery
-Take RechargeableBatteryout of Carrying Case and use iy. Be
sure to carryRechargeableBatteryinthisCarrying Case. Ifnot,
mayeither head or ignite byshorting with ametal.
4. Location of Controls
5. Operation Checks and Component Replacement /
Procedures
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 ressemblyprocedures are
described onlywhen required.
3. Select item from the following index when checks or replacement
are required.
Contents
1. Checking for the mainP.C.B.
2. Checking for the memoryP.C.B.
3. Checking for the tuner P.C.B.
4. Checking for the LCD ass’y.
5. Checking for the prevent electrostaticdischarge.
5.1. Removal of the batterycover
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5.2. Removal of the front cabinet
5.3. Removal of the memoryP.C.B.
5.4. Removal of the mainP.C.B.
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5.5. Removal of the batteryterminal.
5.6. Removal of the LCD Ass’y
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5.7. Removal of the LCD Piece
5.8. Removal of the mode button and holdknob
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5.9. Removal of the USBfixpiece and USBcover
5.10. Removal of the RECbutton
5.11. Removal of the tuner P.C.B. and MICass’y
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6. Instructions for Repair Service
7. Service Position
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8. Service Mode
8.1. Checking Procedures for IC3C2HBZG000008
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8.2. Checking Procedures for Font table
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9. Service Precautions
9.1. Install and Copythe software (DFU,firmware,font table) After
replacing the mainPCB and DSP IC(mainCPU),reinstall DFUand
firmware,and copyfont tableagain.
9.2. Please contact to the service organization of the belonging for
the acquisition of data and obtainthe software.
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10. Troubleshooting
-What to prepare
-APCthat has the exclusive application software (WindowsMedia
Player V9.0) installed. Besure to check for normal operation of the
PC. Ifother application software isinstalled inthe PC, be sure that
thissoftware does not affect the operation of the WindowsMedia
Player V9.0.
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-When auser’sproduct istaken infor service, be sure to obtainnot
onlythe player and USBreader/writer. Also, tryto obtainas much
information as possibleon the operational environmentofthe
user’sPC.
<PC’soperational environment>
Product name, model number, name of CPU, operation clock, RAM
capacity, HD capacity, names of installed software, use of USB
hub, and anyequipment connected with USBsimultaneously.
-Checkpoints before servicing
-Does the batteryhave enough capacity?
Beaware that manganese batteries do not have sufficient
capacitor; theiruse can resultinimproper operation.
-Precautions
-APCsometimes does not recognize the USBreader/writer
depending on its conditions (such as competing with the installed
software). Therefore, alwayskeep the PCingood condition so that
anyadaptor can be connected properly.
-There isapossibilitythat not onlythe hardware but also software
(PC’sapplication software) maybe the source of the problem.
Therefore, be sure to inspect all potential sources carefullyand
thoroughlybefore specifying anycauses.
Remarks:
-When the PCdoes not recognize the USBreader/writer as a
removabledisc even when the USBreader/writer isconnected to
the PC, thisisan indication of an abnormal USBreader/writer. To
confirm this, and to improve the accuracyof your service
diagnosis, however, itisrecommended that you repeat the check
procedure with anew, properlyfunctioning USBreader/writer.
-Ifthe PCdoes not operate normally, itisnot possibleto check the
problem accurately.
-Besure to keep the PCworking properlyaccording to its operating
requirements.
-WindowsMediaPlayer (V9.0) (recommended) Free download from:
http://www.microsoft.com/downloads/
11. Troubleshooting guide
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-Before repairing the unit, make the below check.
-Nooperation:
-The HOLDfunction ison.
-The rechargeablebatterymaybe depleted.
-Playtime isshort after recharging:
-Thismayoccur the first time you recharge the batteryor ifyou
haven’tused them for along time.Playtime shouldbe restored
after afew recharges.
-Ifplayisextremelyshort even after fullyrecharging the battery,
the batterymayhave exceeded theirlife. Rechargeablebatterycan
be recharged approximately300 times.
-Nosound or there isalot of noise:
-Ensure the earphone plug isinserted firmly.
-Wipe the plug clean with aclean cloth.
-Turn up the volume.
-Keep thisunitawayfrom mobiletelephones.
-Playdoesn’tresume from the track where I stopped play:
-Thisdoesn’twork if:
You download, record, or delete files,or charge the battery.
The random playmode ison.
-Playdoesn’tstart from the first track:
-The random playmode maybe on.
-Playusuallyresumes from the track where you last stopped play.
Use skipto return to the first track.
-The unitstops working:
-Take the rechargeablebatteryout for about 5seconds, then
reinsert it.
-RESET procedure
1.Slide the HOLDswitch to ON.
2.Turn the uniton.
3.Press [-MODE] 3times.
4.Press [REC/STOP].
All the memories inthe unit are deleted.
-The displayistoo dark or too light:
-Adjust the contrast.
-Playdoesn’tstart immediately:
-Depending on the amount of data inthe unit, itmaytake some time
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for playto start after downloading / recording or changing the
battery.
-The AC adaptor becomes warm during recharging:
-Thisisnormal.
12. Type Illustration of ICs, Transistors and Diodes
13. Block Diagram
14. Schematic Diagram Notes
Notes:
-Circuitvoltage and waveform described hereinshall be regarded
as reference information when probing defect point, because it
maydiffer from an actual measuring value due to difference of
Measuring instrument and its measuring condition and product
itself.
Thisschematicdiagram maybe modified at anytime with the
development of new technology.
S1: PLAY / STOP switch
S2: FF switch
S3: REW switch
S4: Volume up switch(VOL+)
S5: Volume downswitch(VOL-)
S6: REC switch
S7: MODE switch
S8: HOLD switch(HOLD)
-The supplypart number isdescribed alone inthe replacement
parts list.
-Voltage from negative terminal of battery.
()...MP3 position, []...FM position.
Nomark...MP3 AND FM position.
-Voltage and signal line / :Positive voltage line /
:FM RFsignal line / :Audiosignal line / :Mp3
signal line / :RECsignal line /
-Important safetynotice:
Components identified bymark have special characteristics
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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 only
manufacturers specified parts showninthe parts list.
-Caution!
ICand LSI are sensitive to staticelectricity.
Secondarytroublecan be prevented bytaking care during repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
Put aconductive mat on the work table.
Donot touch the legs of ICor LSI with the fingers directly.
15. Schematic Diagram
16. Printed Circuit Board Diagram
17. Cabinet Parts Location
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