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HANDLING CHIP COMPONENTS

© 

WARNING

All ICs and many other semiconductors are susceptible to
electrostatic discharges (ESD). Careless handling during
repair can reduce life drastically.
When repairing, make sure that you are connected with the
same potential as the mass of the set via a wristband with
resistance. Keep components and tools at this potential.

ATTENTION

Tous les IC et beaucoup d´autres semi-conducteurs sont
sensibles aux décharges statiques (ESD). Leur longévite
pourrait être considérablement écourtée par le fait qu´aucune
précaution nést prise à leur manipulation.
Lors de réparations, s´assurer de bien être relié au même
potentiel que la masse de l´appareil et enfileer le bracelet
serti d´une résistance de sécurité.
Veiller à ce que les composants ainsi que les outils que l´on
utilise soient également à ce potentiel.

WARNUNG

Alle ICs und viele andere Halbleiter sind empfindlich
gegenüber elektrostatischen Entladungen (ESD).
Unsorgfältige Behandlung im Reparaturfall kann die
Lebensdauer drastisch reduzieren.
Sorgen Sie dafür, daß Sie im Reparaturfall über ein Puls-
armband mit Widerstand mit dem Massepotential des
Gerätes verbunden sind.
Halten Sie Bauteile und Hilfsmittel ebenfalls auf diesem
Potential.

ñ 

WAARSCHUWING

Alle IC´s en vele andere halfgeleiders zijn gevoelig voor
electrostatische ontladingen (ESD).
Onzorgvuldig behandelen tijdens reparatie kan de levensduur
drastisch doen vermindern. Zorg ervoor dat u tijdens reparatie
via een polsband met weerstand verbonden bent met hetzelfde
potentiaal als de massa van het apparaat.
Houd componenten en hulpmiddelen ook op ditzelfde potentiaal.

AVVERTIMENTO

Tutti IC e parecchi semi-conduttori sono sensibili alle scariche
statiche (ESD).
La loro longevità potrebbe essere fortemente ridatta in caso di
non osservazione della più grande cauzione alla loro
manipolazione. Durante le riparationi occorre quindi essere
collegato allo stesso potenziale che quello della massa
delápparecchio tramite un braccialetto a resistenza.
Assicurarsi che i componenti e anche gli utensili con quali si
lavora siano anche a questo potenziale.

©

Safety regulations require that the set be restored to its
original condition and that parts which are identical with
those specified be used.
Safety components are marked by the symbol

i

Le norme di sicurezza estigono che l´apparecchio venga
rimesso nelle condizioni originali e che siano utilizzati i
pezzi di ricambiago identici a quelli specificati.
Componenty di sicurezza sono marcati con

ñ

Veiligheidsbepalingen vereisen, dat het apparaat in zijn
oorspronkeliijke toestand wordt teruggebracht en dat
onderdelen, identiek aan de gespecificeerde, worden toegepast.
De Veiligheidsonderdelen zijn aangeduid met het symbool

s

 

Varning !

Osynlig laserstrålning när apparaten är öppnad och
spärren är urkopplad. Betrakta ej strålen.

 Advarsel !

Usynlig laserstråling ved åbning når sikkerhedsafbrydere 
er ude af funktion. Undgå udsaettelse for stråling.

ß

 Varoitus !

Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina
näkymättömälle laserisäteilylle. Älä katso säteeseen !

f

"Pour votre sécurite, ces documents doivent être utilisés par
des spécialistes agréés, seuls habilités à réparer votre
appareil en panne".

ESD

SAFETY

d

Bei jeder Reparatur sind die geltenden Sicherheitsvor-
schriften zu beachten. Der Originalzustand des Gerätes
darf nicht verändert werden. Für Reparaturen sind Original-
ersatzteile zu verwenden.
Sicherheitsbauteile sind durch das Symbol          markiert.

f

Les normes de sécurité exigent que l`appareil soit remis
à l`état d`origine et que soient utilisées les pièces de
rechange identiques à celles spécifiées.
Les composants de sécurité sont marqués

CLASS 1

LASER PRODUCT

© 

DANGER: Invisible laser radiation when open.

©

After servicing and before returning the set to customer
perform a leakage current measurement test from all 
exposed metal parts to earth ground, to assure no
shock hazard exists.
The leakage current must not exceed 0.5mA.

AVOID DIRECT EXPOSURE TO BEAM.

HANDLING CHIP COMPONENTS

Содержание MC150/21

Страница 1: ...ce tools 2 1 Service measurement setup 2 2 Connections and controls 3 1 3 2 Disassembly diagram 4 1 Pin description of ICs 4 2 4 4 Set block diagram 5 1 Set wiring diagram 5 2 LCD BOARD circuit diagram 6 1 layout diagram 6 2 HEADPHONE BOARD circuit diagram 6 1 layout diagram 6 2 KEY BOARD circuit diagram 6 1 layout diagram 6 2 POWER BOARD circuit diagram 6 1 layout diagram 6 3 CD BOARD circuit dia...

Страница 2: ...llo stesso potenziale che quello della massa delápparecchio tramite un braccialetto a resistenza Assicurarsi che i componenti e anche gli utensili con quali si lavora siano anche a questo potenziale Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used Safety components are marked by the symbol i Le norme di si...

Страница 3: ...0 Hz Battery remote 3 V R6 x 2 Power consumption normal Standby 3 W Dimension W x H x D 156 x 222 x 216 mm Weight without speakers 2 95 Kg AMPLIFIER Output power mains 2 x 5 W RMS Speaker impedance 2 x 3 ohm Frequency response within 3dB 60 Hz 14 kHz TUNER FM SECTION 87 5 108 MHz IF frequency 10 7 MHz 0 02 MHz Sensitivity 22 dBf at 26dB S N Selectivity 300kHz 40 dB IF rejection 65 dB Image rejecti...

Страница 4: ...Ω Aerial replacement Capacitor R 50Ω Bandpass 250Hz 15kHz e g 7122 707 48001 LF Voltmeter e g PM2534 DUT S N and distortion meter e g Sound Technology ST1700B Frame aerial e g 7122 707 89001 Tuner AM MW LW To avoid atmospheric interference all AM measurements have to be carried out in a Faraday s cage RF Generator e g PM5326 Ri 50Ω Low pass filter 22kHz L R LEVEL METER e g Sennheiser UPM550 with F...

Страница 5: ...t fully for optimum reception C Speakers Connection Front Speakers Connect the speaker wires to the SPEAKERS terminals right speaker to RIGHT and left speaker to LEFT coloured marked wire to and black unmarked wire to Fully insert the stripped portion of the speaker wire into the terminal as shown Notes For optimal sound performance use the supplied speakers Do not connect more than one speaker to...

Страница 6: ...ayback à á fast rewinds forwards the tape STOP OPEN stops the tape opens the tape compartment PAUSE pauses recording or playback 7 VOLUME 3 4 VOL 3 4 adjusts volume level adjusts the hours and minutes for clock timer functions 8 iR SENSOR infrared sensor for remote control 9 TIMER CLOCK activates deactivates or sets the timer function sets the clock function views the clock time 0 REPEAT SHUFFLE r...

Страница 7: ... or coloured red Do not connect either wire to the earth terminal in the plug marked E or e or coloured green or green and yellow Before replacing the plug cover make certain that the cord grip is clamped over the sheath of the lead not simply over the two wires Copyright in the U K Recording and playback of material may require consent See Copyright Act 1956 and The Performer s Protection Acts 19...

Страница 8: ...intenance Use only normal IEC I tape for recording Apply a piece of adhesive tape over the missing tab space GENERAL The system does not react when buttons Remove and reconnect the AC power plug and are pressed switch on the system again Sound cannot be heard or is of poor Adjust the volume quality Disconnect the headphones Check that the speakers are connected correctly Check if the stripped spea...

Страница 9: ...AM A To remove Rear Cabinet B To remove CD Tray C To remove Main Board D To remove CD Board E To remove Tape Deck F To remove LCD Board G To remove Cassette Key Plate H To remove Transformer Holder 2 2 4 3 2 2 2 2 2 5 3 4 5 4 3 ...

Страница 10: ...eft input BUFGND 33 I audio buffer ground LKILL3 4 O KILL output for left channel con urable as open drain RKILL3 5 O KILL output for right channel con urable as open drain N C3 6 O No connection N C3 7 O No connection N C3 8 I No connection CFLAG3 9 O correction g output open drain VSSD1 40 SUP digital ground1 VDDD1 41 SUP digital supply voltage1 SDI 42 I serial data input loopback WCLI 43 I word...

Страница 11: ...CLK16 CLK4 12 TIMING CDTRDY CDTDATA CDTCLK CD TEXT INTERFACE SFSY STATUS SBSY SUB RCK RESET INTERFACE CONTROL DECODER MICRO CONTROLLER INTERFACE VOLTAGE BUFFER HF AND LF CAPTURE SAA7379 This text is here in force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader This text is here inThis text is here in rce landscape pages to be rotated correctly when brows...

Страница 12: ...ENABLE 29 bus write enable input P0 30 programmable output port P0 P1 31 programmable output port P1 AFC 32 450 kHz LC circuit FM IFI2 33 FMIF input 2 input impedance typical 330 Ω VSTAB B 34 internal stabilized supply voltage B FM IFO1 35 FMIF output 1 output impedance typical 330 Ω AM IFI O2 36 input output to IF Tank IFT output current source FM IFI1 37 FMIF input 1 input impedance typical 330 ...

Страница 13: ...SET BLOCK DIAGRAM 5 1 5 1 ...

Страница 14: ...5 2 5 2 SET WIRING DIAGRAM ...

Страница 15: ...6 1 6 1 CIRCUIT DIAGRAM LCD HP KEY RECTIFIER BOARD ...

Страница 16: ...6 2 LAYOUT DIAGRAM LCD BOARD COMPONENT LAYOUT 6 2 SMD LAYOUT LAYOUT DIAGRAM HEADPHONE BOARD COMPONENT LAYOUT SMD LAYOUT LAYOUT DIAGRAM KEY BOARD COMPONENT LAYOUT SMD LAYOUT ...

Страница 17: ...6 3 LAYOUT DIAGRAM POWER BOARD COMPONENT LAYOUT SMD LAYOUT 6 3 ...

Страница 18: ...7 1 CIRCUIT DIAGRAM CD BOARD 7 1 ...

Страница 19: ...7 2 7 2 LAYOUT DIAGRAM CD BOARD COMPONENT LAYOUT LAYOUT DIAGRAM CD BOARD SMD LAYOUT ...

Страница 20: ...CIRCUIT DIAGRAM MAIN BOARD 8 1 8 1 ...

Страница 21: ...CIRCUIT DIAGRAM MAIN BOARD TUNER PART 8 2 8 2 ...

Страница 22: ...8 3 8 3 LAYOUT DIAGRAM MAIN BOARD COMPONENT LAYOUT LAYOUT DIAGRAM MAIN BOARD SMD LAYOUT ...

Страница 23: ...DESCRIPTION QUANTITY SCREW LIST 4 8 7 6 27 13 1 9 12 26 26 24 17 24 11 14 16 21 19 22 23 18 22 ITEM 28 13 6 29 SET EXPLODED VIEW DIAGRAM 9 1 9 1 ...

Страница 24: ...21 Note Only these parts mentioned in the list are normal normal service parts 29 9940 000 00618 TAPE PCB ASS Y ELECTRICAL PARTSLIST 1707 9940 000 00389 REC SWITCH 18PIN 7705 9940 000 00388 IC D7312CP PREAMPLIFIER D407 9940 000 00376 CH VARIABLE CAP DIODE BB804 D408 9940 000 00376 CH VARIABLE CAP DIODE BB804 F701 9940 000 00384 FUSE PTU 1A 250V F702 9940 000 00385 FUSE PTU 2A 250V HP800 9940 000 0...

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