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Allgemeiner T

eil / General Section

EC 4790 CD

1 - 8

GRUNDIG

Service

Operating Hints

This chapter contains excerpts from the operating instructions. For further particulars please refer to the appropriate user instructions the part number of which is indicated in the relevant
spare parts list.

Example: Bass

Repeatedly and briefly press the left-hand
control knob 

ÄÄ  

until the display indicates:

Turn the left-hand control knob 

ÄÄ  

until the

bass tones are to your taste.
Instant resetting to medium position: 
Press the left-hand control knob 

ÄÄ  

until a

signal sounds.

LOUD (Loudness)

The loudness function improves the sound
quality at low volume. It can be switched on
and off with the left-hand control knob 

ÄÄ

.

Press the 

ÄÄ

knob until the signal sounds. The

display then indicates either ”

LOUD    ON

” or

LOUD    oFF

”.

Volume and Sound Settings

Volume

Turn the left-hand control knob 

ÄÄ

.

The display indicates:

VOL 00

” … ”

VOL 46

”.

Sound settings

For each of the FADERLOUDBASS,
TREBLE, and BALANCE settings applies:

1. Select the desired function by briefly 

pressing the left-hand control knob 

ÄÄ

once or several times.

2. Adjust the desired sound by turning the

left-hand control knob 

ÄÄ

or
select the basic setting: press the left-hand
control knob 

ÄÄ  

until a signal sounds.

3. Terminate settings: press the left-hand con-

trol knob 

ÄÄ  

again until the display indica-

tes, for example, the name or frequency of
the station.

66

After approximately 10 seconds, each 
setting is terminated automatically.

FAD (Fader)

The fader function is used to alter the balance
between the front (”F”) and rear (”R”) loud-
speaker groups.

66

If you wish to connect only one loudspea-
ker pair, use the 2 x 20 Watt adapter sup-
plied. The fader control then must be set to
its medium position.

BAL (Balance)

The balance function is used to alter the
balance between the left (”L”) and right (”R”)
loudspeakers.

Left-hand 
control knob 

ÄÄ

SOUND

Radio (Tuner)

Selecting the TUNER FM range

Repeatedly and briefly press the 

¡

button

until the display indicates ”

TUNER FM

”.

Stereo reception (FM only)

You are receiving a stereo broadcast when the
display indicates ”

)

” .

Traffic announcement standby (TP)

TP (TRAFFIC PROGRAM) = 
stations broadcasting traffic announcements.

Switching TP on/off:
Briefly press the

¡

TP      

button.

Traffich announcement stanby on: the ”TP
sign is surrounded by an orange rectangle.

66

If the station tuned to is no TP station, the
radio starts automatically a search for the
next TP station.

Aborting the current traffic announcement:
Briefly press the

¡

TP      

button.

…

Traffic announcements come through
with a certain minimum volume.

You can adjust this minimum volume for 
traffic announcements in the EXPERT control
level menu, see page 15, EXPERT 

§?

.

66

You will hear only traffic annoucements if
the "Traffic announcement standby" func-
tion is activated with the

¡

TP      

button and

the volume level is set to ”zero” with the
left-hand control knob 

ÄÄ  

(turn to left end

stop).

66

When a traffic announcement is received,
CD play or CD changer play will be inter-
rupted for the duration of this announce-
ment.

Alternative frequencies (AF)

When receiving a DSR programme which is
broadcast by several stations on different fre-
quencies, the car radio will automatically tune
to the frequency giving best reception.

66

When you are in an area with very poor
reception conditions, it may happen that
short pauses occur while the radio is
searching for the alternative frequencies. 
It is best in this case to switch the AF 
function off.

Switching off the AF function
This applies only for stations broadcasting
alternative frequencies.

Press the 

¡

TP      

button until the signal

sounds. The red rectangle around the 
AF” sign disappears. 

Indication:
AF

AF switched off, but the received
station offers AF.

Re-activating the AF function
Press the 

¡

TP      

button until the signal

sounds. A red rectangle around the ”AF” sign
appears. 

Indication:

The received station offers AF and the
function is activated. This is the factory
default setting.

AF

2. Select a station/RDS programme (FM), for

example, by calling up a LEARN memory
position.

66

If the selected station/RDS programme is
already stored in a memory position, the
display will indicate its number.

3. Store the selected station/RDS programme:

Briefly press the 

¡

button. The STORE

sign is shown in the display. Select the
desired memory position (Preset) number
1 to 48 by turning the right-hand 

¢

¢

control

knob.

Confirm this by pressing the 

¡

button 

or the right-hand 

¢

¢

control knob until the 

signal sounds and 

STORED

” appears in the

display.

66

If you select no Preset number, the station
is automatically allocated to the next free
Preset. The display indicates ”

FREE

”. 

66

The selected AF and TP settings are stored
along with the station.

Setting RDS programmes with the
LEARN memory

With the push of a button you can store up to
25 RDS programmes in the LEARN memory!
The stored RDS programmes can be called up
one after the other, see ”Important Informati-
on”, page 20.

66

The LEARN memory is useful if you are 
in an unknown reception area and do 
not wish to erase your stored stations 
(Presets).

Releasing a LEARN search

Select the ”

TUNER FM

” range by pressing the

¡

button.

Press on the right-hand 

¢

¢

control knob until

the first signal sounds.

LRN ...

” appears in the display and the radio

scans the FM range.

66

Always wait until the LEARN search is
completed. It is not possible to abort the
search function.

Radio

66

If no reception is possible (in an under-
ground car park, or when the aerial is
defective, for example, see page 21), the
LEARN search function can be endless.
As soon as the LEARN search function is
completed, up to 25 stations are stored 
and you will hear the station giving best
reception.

Calling up the LEARN memory contents

Select the ”LEARN” mode by repeatedly pres-
sing the right-hand 

¢

¢

control knob until the

display briefly indicates ”

LEARN

”.

Turn the right-hand 

¢

¢

control knob to call up

the Presets stored in the LEARN memory in
the desired direction. 
While the radio scans the memory, the display
indicates ”

RDS-SCAN

”.

Allocating FM Presets

48 Presets (memory positions) are availabe in
the ”

TUNER FM

” range.

1. Select the ”

TUNER FM

” range by pressing

the 

¡

button.

Manual frequency tuning

1. Select the ”

TUNER FM

” or ”

TUNER AM

range.

2. Press the right-hand 

¢

¢

control knob until

the second signal sounds and the display
indicates the red ”MAN” sign and briefly

MANUAL

”.

3. Turn the right-hand 

¢

¢

control knob to the

left or to the right to change the frequency
in the corresponding direction in steps of
50 kHz in the FM band and in steps of 
1 kHz in the AM band. The display indica-
tes 

FM 92.70

, for example.

66

The right-hand 

¢

¢

control knob has a

”flywheel” function for fast tuning.

4. If you wish to store the found stations on

Presets (memory positions), see page 8,
”Allocating FM presets”.

5. To terminate manual frequency tuning,

press the right-hand 

¢

¢

control knob.

Selecting stations/RDS programmes
with the search function

1. Select the ”

TUNER FM

” range by pressing

the 

¡

button.

2. Repeatedly and briefly press the right-hand

¢

¢

control knob until ”

SEARCH

” appears 

briefly in the display. 

3. Turn the right-hand 

¢

¢

control knob to start

the search function in the desired direction.

66

The search function operates with two 
different sensitivities. When exploring the
frequency range the first time, it searches
for stations with high field strength (local
reception). When exploring the range the
second time, it searches also for stations
with low field strength (distant reception).

4. If you wish to store the found stations on

Presets (memory positions), see page 8,
”Allocating FM presets”.

Radio

Calling up Presets

1. Select the ”

PRESET

” mode by repeatedly

and briefly pressing the right-hand 

¢

¢

con-

trol knob until the display briefly indicates

PRESET

” and then the  green PRESET

sign.

2. Turn the right-hand 

¢

¢

control knob to 

select the desired Preset. 

66

The memory contents are maintained even
when disconnecting the battery voltage.

Erasing Presets

To erase an occupied memory position (Pre-
set), briefly press the 

¡

button until the

display indicates the STORE sign. Turn the
right-hand 

¢

¢

control knob to select the Preset

you wish to erase then press this knob until
two signals sound and the display indicates
for approximately two seconds ”

ERASED

”.

Summary of Contents for EC 4790 CD

Page 1: ...s for the Complete Service Service Manual Grundig Service Hotline Deutschland TV TV SAT VCR LiveCam HiFi Audio Car Audio Telekommunikation Fax Planatron 8 00 22 00Uhr 0180 52318 41 0180 52318 49 0180 52318 48 0180 52318 42 0180 52318 43 0180 52318 44 0180 52318 45 0180 52318 51 0180 52318 99 Mo Fr 8 00 18 00 Uhr 0180 52318 40 0180 52318 50 Telefon Fax Technik Ersatzteil Verkauf Mo Fr 8 00 19 00 Uh...

Page 2: ...Board 3 24 Spare Parts List 4 1 4 2 jInhaltsverzeichnis Seite Allgemeiner Teil 1 2 1 7 Meßgeräte Meßmittel 1 2 Ausbauhinweise 1 3 Bedienhinweise 1 4 Abgleichvorschriften 2 1 2 3 Schaltpläne und Druckplattenabbildungen 3 1 3 24 Schaltpläne Bedien Teil 3 1 CD Teil 3 3 HF Teil 3 4 Prozessor Teil 3 7 NF Teil 3 11 Platinenabbildungen Hauptplatte 3 15 Bedienplatte 3 23 Anschlußplatte 3 24 Ersatzteillist...

Page 3: ... L Fig 1 and 2 screws M Fig 7 Lift the CD Drive and open flexprint connector Fig 1 Ausbauhinweise 1 Entnehmen einer CD bei defektem Laufwerk Deckelblech abnehmen Die 4 Schrauben A Fig 1 herausschrauben und die Abdeckung B hochheben Achtung Kabel C Den CD Deckel D Fig 2 hochheben und die CD herausnehmen Beim Wiederzusammenbau auf die Rastung E Fig 3 achten 2 Frontblende abnehmen Deckel und Bodenble...

Page 4: ...st AF aktiviert AF 2 Stellen Sie einen Sender RDS Programm UKW ein z B durch Abruf eines LEARN Speichers 6 6Ist der eingestellte Sender RDS Programm bereits auf einem Speicherplatz abgelegt wird die jeweilige Ziffer im Anzeigefeld dar gestellt 3 Eingestellten Sender RDS Programm speichern Taste kurz drücken Das Zeichen STORE im Anzeigefeld ist zu sehen Stellen Sie mit dem rechten Drehgeber den gew...

Page 5: ...N Zufalls Titelsuche beenden Drücken Sie den rechten Drehgeber länger im Anzeigefeld erscheint RND OFF Diese Funktion wird beim Ausschalten auto matisch zurückgesetzt CD Wechsler Betrieb beenden Drücken Sie kurz die Taste und wählen Sie eine andere Programmquelle DAT Betrieb 6 6Diese Funktionen können Sie nur aus führen wenn Sie einen geeigneten CD Wechsler angeschlossen haben Bitte beachten Sie a...

Page 6: ...ingeschaltet und SAFE erscheint im Anzeigefeld Aktivieren Sie die Einstellung Drücken Sie den rechten Drehgeber kurz Im Anzeige feld erscheint CH 1 CH Change ändern 2 Code Nr siehe Identity Card wie im Kapitel Codierung aktivieren beschrieben durch Drehen des rechten Drehgebers eingeben 3 Code Nr bestätigen Rechten Drehgeber drücken bis im Anzeigefeld vorübergehend CODE erscheint Nach ca 3 Sekunde...

Page 7: ...C17 C6 und A5 darf zusammen 0 5 A nicht übersteigen Ein und Ausbau CD Entfernen Sie bei ausgeschaltetem Radio eine ausgeschobene CD um eine Verletzung durch die CD bei plötzlichem Bremsen oder einem Unfall zu vermeiden Befestigen Sie das Radio sicher im Einbau schacht damit Sie auch bei schlechter Weg strecke CD Musik in hoher Qualität genießen können Radio Empfangsbedingungen UKW Empfang Während ...

Page 8: ...ogramme FM for example by calling up a LEARN memory position 6 6If the selected station RDS programme is already stored in a memory position the display will indicate its number 3 Store the selected station RDS programme Briefly press the button The STORE sign is shown in the display Select the desired memory position Preset number 1 to 48 by turning the right hand control knob Confirm this by pre...

Page 9: ...right hand control knob until RND OFF appears in the display When switching the radio off this function will automatically be reset Ending CD changer mode Briefly press the button and select another programme source 6 6The following functions are only possible if you have connected a suitable CD changer to your radio Please also observe the ope rating instructions of the CD changer On page 21 you ...

Page 10: ...nob The display indicates CH 1 CH Change 2 Enter the code number on the Identity Card by turning the right hand control knob as described under Activating Coding 3 Confirm the code number Press the right hand control knob until CODE appears briefly in the display The radio will play after approximately 3 seconds Coding is deactivated If you have entered the incorrect code number SAFE remains in th...

Page 11: ...nd Removal CD When the radio is switched off remove an ejected CD to prevent injuries by the CD in the case of sudden braking or accidents Fix the radio securely in its mounting facility to ensure high quality CD play even in the case of bad roads Radio reception conditions VHF FM reception Reception conditions change constantly while you are driving Mountains buildings or bridges can all disturb ...

Page 12: ...eingang Frequenz 87 8MHz fmod 1kHz Hub 22 5kHz E 3µV 10dBµV NF Voltmeter an Lautsprecher Ausgang Meßsender an Antenneneingang Frequenz 93 5MHz fmod 1kHz Hub 22 5kHz E 3µV 10dBµV NF Voltmeter an Lautsprecher Ausgang Meßsender an Antenneneingang Frequenz 93 5MHz keine Modulation E 100µV 40dBµV DC Voltmeter zwischen FMP121 und FMP122 Mit L612A 2 bei 531kHz auf 1 2V 20mV abgleichen Kontrolle bei 1602k...

Page 13: ...ope to FMP115 Connect a Test Generator to aerial input Frequency 87 8MHz fmod 1kHz dev 22 5kHz E 3µV 10dBµV Connect an AF Voltmeter to Loudspeaker Output Connect a Test Generator to aerial input Frequency 93 5MHz fmod 1kHz dev 22 5kHz E 3µV 10dBµV Connect an AF Voltmeter to Loudspeaker Output Connect a Test Generator to aerial input Frequency 93 5MHz no modulation E 100µV 40dBµV Connect DC Voltmet...

Page 14: ...12A 2 L613A 3 L603A 4 L604A 5 F101 8 L04 7 F105 L01 9 L03 0 F601A 1 Q873 Q701 Q883 1 3 CD BUS 4 1 FL RL RL RR RR FR FR FL 4 1 2 3 1 IC1471L 2 3 1 IC1472L Q301 F102 F104 F103 CR105 6 20 11 10 1 CIC101 1 16 9 8 CIC01 1 16 9 8 CIC701 1 16 9 8 CIC601A CIC501 44 1 34 33 22 23 12 11 CIC1501 CBU1471L 80 1 64 65 41 40 25 24 CIC800 1 14 8 7 CIC802 639 122 121 115 24 ...

Page 15: ...02 10N CC1001 G1001 39K CR1021 39K CR1019 CS1004 39K CR1018 39K CR1017 390K CR1061 1N0 CC1011 1N0 CC1008 22N CC1009 22N CC1007 1N0 CC1006 CS1002 CS1001 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CBU1001 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CBU1002 27K CR1056 BC847B CT1001 27K CR1057 22N CC1004 INK2 INK2 G_SIEB G_SIEB 30V 30V T T T TAST TAST TAST LK1 LK1 G1 S14 S13...

Page 16: ...EGATIV ALLE SPANNUNGEN SIND NÄHERUNGSWERTE GEMESSEN BEI UB 14V GEGEN MINUS 13V8 5V0 5V0 D S G BF543 CT606A 10U 16V C603A 1SV172 CD01 BU01 22U 16V C30 BC818 40 CT603A BC848C CT604A BC848C CT607A C606A CC12 3P9 12P CC05 CC10 4P7 8P2 CC07 CC25 100N 15P CC08 CC09 1P0 2P2 CC04 CC20 COG 1N0 8P2 CC06 3P3 CC02 22N CC21 47N CC604A 100N CC609A CC613A CC614A 1N0 COG 1N0 CC22 CC617A 10N CC612A COG 1N0 CC11 10...

Page 17: ... PREAMPLIFIER N DIVIDER R DIVIDER OSCILLATOR LATCH SHIFT REG LATCH INTERFACE I C BUS 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CIC701 U4286BM FB 1 2 4 6 8 CR105 100K FMP636 FMP103 FMP106 FMP113 FMP107 FMP01 FMP658 FMP116 FMP624 FMP111 FMP122 FMP663 FMP108 FMP626 FMP121 FMP672 FMP104 FMP102 FMP618 FMP639 FMP646 MP606 FMP115 7 8 1 3 4 6 F601A 100U 10V C717 100U 10V C707 1MHZ 50khz DEMOD QUADRATUR KOMP ...

Page 18: ...4 FIP6 CIC800 UPD78045 4U7 16V C804 FMP803 FMP802 FMP801 1U0 50V C806 4 3 2 1 8 7 6 5 CIC801 24LC16 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CBU802 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CBU801 100U 6V3 C891 100U 6V3 C808 7 6 5 4 3 2 1 8 9 10 11 12 13 14 GND VDD CIC802 40106 8305 741 106 LH3344 00 D802 220U 6V3 C823 220U 6V3 C802 1K0 CR849 CR821 10K CR819 10K CR81...

Page 19: ...ENZ DECODER DIFFERENTIAL 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 CIC501 8305 826 579 SAA6579T 1U0 50V C2052 1U0 50V C2064 1U0 50V C2301 5 6 7 8 4 3 2 1 CIC2052 L78L05ACD BC368 T2302 BC368 T2301 100U 6V3 C2051 47U 16V C2053 10U 16V C2302 47K CR2051 100K CR2054 3K3 CR2052 47K CR2053 47K CR2056 CR2057 100R 15K CR2070 1K0 CR2066 22K CR2064 27K CR2069 CR503 0R CR2076 100R CR2077 100R 10K CR2061 CR2062 1...

Page 20: ...2 FMP301 FMP201 FMP308 FMP307 FMP1624 FMP1623 FMP1622 FMP1621 FMP1554 FMP1552 FMP1550 FMP1501 FMP1600 FMP1601 FMP1602 FMP1603 FMP1508 CD301 BAV99 BC848C CT301 CSB456_F11 Q301 10U 16V C307 220N 50V C301 PAUSE LEVEL VHCC VSB VR CREF GND VS MPX IN PEAK TBLANK HCR HCL TRR TRL L L R R CSM L R INR INL OUTL OUTR TREBLE R ICD CD L L PHONE GND PHONE IN CDR MUTE FM L FM R DIGGND SDA SCL TBR TBL BEEP AM CD B...

Page 21: ...4V 14V 14V 14V GND GND L RR L RR CD L CD L FR A CD BUS CD R CD GND CD L A A A A U 15 07 99 19373 228 00 HAUPTPLATTE 19373 222 00 ENDSTUFE POWER AMPLIFIER 9V2 4 CONNECTING BOARD ANSCHLUSSPLATTE MAIN BOARD BAUTEILE REFLOWSEITE S KONT S KONT WS VI GN RT BR SW BR OR SW BL GE GN RT II 5 II 6 II 7 II 8 II 3 II 4 II 1 3N9 CC1732 A9 A8 A7 A4 A5 A10 A1 A2 A3 A11 3N9 CC1738 II 2 3N9 CC1707 A13 I 2 I 5 I 4 I...

Page 22: ...54 C2069 20 147 C2071 33 148 C2301 24 114 C2302 19 117 D802 8 154 D2064 35 143 F101 123 31 F102 119 41 F103 120 56 F104 120 49 F105 134 80 F601A 97 38 F602A 91 36 IC1471L 12 28 IC1472L 42 12 IC1601 73 166 IC2001 137 111 L01 132 17 L03 133 29 L04 135 43 L603A 92 16 L604A 101 16 L612A 82 16 L613A 74 16 L2001 111 146 L2060 25 163 Q301 126 84 Q701 91 60 Q873 52 71 Q883 54 58 R1471L 25 13 R1472L 57 13 ...

Page 23: ...069 20 147 C2071 33 148 C2301 24 114 C2302 19 117 D802 8 154 D2064 35 143 F101 123 31 F102 119 41 F103 120 56 F104 120 49 F105 134 80 F601A 97 38 F602A 91 36 IC1471L 12 28 IC1472L 42 12 IC1601 73 166 IC2001 137 111 L01 132 17 L03 133 29 L04 135 43 L603A 92 16 L604A 101 16 L612A 82 16 L613A 74 16 L2001 111 146 L2060 25 163 Q301 126 84 Q701 91 60 Q873 52 71 Q883 54 58 R1471L 25 13 R1472L 57 13 R2010...

Page 24: ...CR854 42 78 CR856 40 86 CR857 37 86 CR858 35 86 CR859 33 86 CR860 39 95 CR861 34 81 CR866 30 86 CR867 27 86 CR868 25 86 CR871 32 101 CR872 27 104 CR873 51 29 CR874 48 29 CR876 48 71 CR877 56 71 CR879 45 66 CR891 14 101 CR1504 89 89 CR1507 93 100 CR1508 96 90 CR1514 119 123 CR1516 115 123 CR1517 121 125 CR1518 130 119 CR1523 99 106 CR1524 100 101 CR1532 102 86 CR1534 107 82 CR1601 95 135 CR1602 91 ...

Page 25: ...CR828 33 53 CR829L 41 62 CR831L 38 57 CR832L 41 54 CR833 44 55 CR841 56 57 CR843 48 62 CR846 36 72 CR847 48 68 CR848 47 71 CR849 36 69 CR851 39 73 CR862 37 86 CR863 35 86 CR869 25 84 CR870 37 113 CR1070 8 164 CR1071 13 148 CR1072 12 124 CR1073 9 124 CR1074 15 154 CR1075 16 148 CR1472L 63 91 CR1473L 45 93 CR1474L 61 108 CR1476L 58 108 CR1477L 66 108 CR1481L 64 108 CR1501 110 114 CR1502 107 114 CR15...

Page 26: ...27 CR1026 CR1023 CR1022 CR1021 CR1019 CR1018 CR1017 CR1061 CT1001 CC1008 Bedienplatte Operating Board Ansicht von der Bestückungsseite View of Component Side 02 00 2B 19373 402 01 2B 00 19373 402 22 1 22 1 G1001 G1051 CS1004 CS1002 TAST C A B R 35 30 25 43 40 15 10 5 2 1 CBU1001 CBU1002 L1003 L1004 L1002 L1001 44 20 CS1001 CS1003 01 425 00 2B 19373 0 1 1 9 3 7 3 4 2 5 0 0 2 L SICHANSL Ansicht von ...

Page 27: ...0 1 18398 103 0000 DREHKNOPF ABNEHMBAR KPL ROTARY KNOB REMOVABLE CPL 0022 000 18313 088 0000 ETUI KPL ETUI CPL 0024 000 18147 035 0000 ANTENNEN ADAPTER ANTENNA ADAPTER 0025 000 18147 036 0000 ADAPTER CLIPS ADAPTER CLIPS 0026 000 18300 099 0100 ANTENNENBUCHSE KPL ANTENNA SOCKET CPL 0027 000 19771 616 1300 ANSCHLUSSGEHAEUSE CONNECTION TERMINAL 0032 000 12037 040 0000 EINBAURAHMEN KPL MOUNTING FRAME ...

Page 28: ... 143 ZK CT 00125 83010 068 4800 SMD TRANS BC 848 C CT 00126 83010 068 4800 SMD TRANS BC 848 C CT 00301 83010 068 4800 SMD TRANS BC 848 C CT 00602 83011 309 9200 SMD TRANS BF 992 A CT 00603 83010 068 1800 SMD TRANS BC 818 40 S8 CT 00604 83010 068 4800 SMD TRANS BC 848 C CT 00606 83011 305 4300 SMD TRANS BF543E7810 SIE CT 00607 83010 068 4800 SMD TRANS BC 848 C CT 00608 83013 701 4300 SMD TRANS DTA ...

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