AKG Pro AKG C451 B Manual Do Proprietário
C 451B
2895Z00..
Service Department, Lemböckgasse 21-25, A-1230 Wien, Austria.Tel.: (431)86654-0, FAX: (431)86654-1514, e-mail:
service@akg.com
10/12
2/5
How to dismantle the capsule side:
For access to the capsule elements or for replacing the cap hold microphone in one hand with the thumb
pressing firmly against the top end of the capsule. The cap is spring loaded and needs quite some force to
be held in place. Now undo the four screws 10. Attention, danger: During this job, never release the cap
1. Otherwise the spring 9 will cause the cap to suddenly come off when loosing the fourth screw causing
damage or injuries. Once the screws 10 are removed, slowly and gently release the cap 1 from the housing
2 and take off cap with capsule assembly. The electrode 6 can be pulled out from the housing by spring 9.
Please never touch the surface of the electrode with bare fingers and prevent any direct mechanical
contact. The membrane 7 lies loosely in the cap 1 and it's surface must never be touched. Take the part
only with utmost care on the circumference of the gold plated holder ring using a fine sized pair of
tweezers. Take care that the ring is not bent.
pressing firmly against the top end of the capsule. The cap is spring loaded and needs quite some force to
be held in place. Now undo the four screws 10. Attention, danger: During this job, never release the cap
1. Otherwise the spring 9 will cause the cap to suddenly come off when loosing the fourth screw causing
damage or injuries. Once the screws 10 are removed, slowly and gently release the cap 1 from the housing
2 and take off cap with capsule assembly. The electrode 6 can be pulled out from the housing by spring 9.
Please never touch the surface of the electrode with bare fingers and prevent any direct mechanical
contact. The membrane 7 lies loosely in the cap 1 and it's surface must never be touched. Take the part
only with utmost care on the circumference of the gold plated holder ring using a fine sized pair of
tweezers. Take care that the ring is not bent.
Inside the front portion of the cap 1 a plastic insulation strip 8 is inserted at the area where the high
impedance elements of the capsule are close to the cap's inner wall (Fig. 1). When replacing the cap this
insulation strip either has to be renewed or taken out from the former cap and used again if not
mechanically damaged. The strip 8 is not contained in spare part 1.
impedance elements of the capsule are close to the cap's inner wall (Fig. 1). When replacing the cap this
insulation strip either has to be renewed or taken out from the former cap and used again if not
mechanically damaged. The strip 8 is not contained in spare part 1.
Fig. 1
Mounting the insulation strip 8 has to be done very carefully. If fitted correctly the strip shall perfectly cling
to the inner wall of the cap. Otherwise proper insertion of membrane and electrode will not be possible. It
may be easier to put the membrane 7 in place first and than wrap the strip over the membrane ring. If not
carefully done the danger of accidental damage to the membrane foil however is high.
to the inner wall of the cap. Otherwise proper insertion of membrane and electrode will not be possible. It
may be easier to put the membrane 7 in place first and than wrap the strip over the membrane ring. If not
carefully done the danger of accidental damage to the membrane foil however is high.
The cap 1 already contains top grid 1.2 and grid sleeve 1.1. The latter is secured to the cap housing with a
two component conductive adhesive. If ever possible this procedure should be carried out when fixing new
grid sleeves.
two component conductive adhesive. If ever possible this procedure should be carried out when fixing new
grid sleeves.
How to remove the amplifier board
If only the printed circuit board or parts of it need replacement, it is not necessary to remove the cap.
Press the microphone with it's connector end firmly to a plain surface against the force of the spring. Then
remove screw and pull out the board 3. When reassembling the capsule contact sleeve will find it's way to
the capsule's contact pin simply by pushing the board home. Now press board into housing and fasten
screw 11. For replacing the contact carrier 3.4 remove all solder from the joint between capsule connector
and board, undo screws 3.5 and pull off the carrier. Please also note the hints on page 4.
Press the microphone with it's connector end firmly to a plain surface against the force of the spring. Then
remove screw and pull out the board 3. When reassembling the capsule contact sleeve will find it's way to
the capsule's contact pin simply by pushing the board home. Now press board into housing and fasten
screw 11. For replacing the contact carrier 3.4 remove all solder from the joint between capsule connector
and board, undo screws 3.5 and pull off the carrier. Please also note the hints on page 4.
Other parts than those mentioned in the parts list are not available.
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Zerlegen des Kapselteiles
Um an die Teile der Kapsel zu gelangen, oder zum Tausch der Kappe 1 halten Sie das Mikrofon in einer
Hand und drücken mit dem Daumen fest gegen die Frontseite der Kappe. Die Kappe ist durch eine Feder 9
mechanisch vorgespannt und eine größere Kraft ist notwendig, um sie in der ursprünglichen Position zu
halten. Nun lösen Sie die vier Schrauben 10. Achtung, Gefahr: Während dieser Tätigkeit niemals die
Kappe 1 auslassen. Andernfalls kann durch die Feder 9 nach lösen der vierten Schraube die Kappe plötzlich
weggeschleudert werden, was Beschädigungen oder Verletzungen zur Folge haben kann. Nachdem die
Schrauben 10 entfernt wurden, lassen Sie die Kappe 1 langsam und vorsichtig aus und nehmen Sie diese
mit den Teilen der Kapsel vom Gehäuserohr 2 ab. Die Elektrode 6 kann an der Feder 9 aus der Kappe
gezogen werden. Berühren Sie bitte niemals die Elektrodenfläche mit bloßen Fingern und vermeiden Sie
Hand und drücken mit dem Daumen fest gegen die Frontseite der Kappe. Die Kappe ist durch eine Feder 9
mechanisch vorgespannt und eine größere Kraft ist notwendig, um sie in der ursprünglichen Position zu
halten. Nun lösen Sie die vier Schrauben 10. Achtung, Gefahr: Während dieser Tätigkeit niemals die
Kappe 1 auslassen. Andernfalls kann durch die Feder 9 nach lösen der vierten Schraube die Kappe plötzlich
weggeschleudert werden, was Beschädigungen oder Verletzungen zur Folge haben kann. Nachdem die
Schrauben 10 entfernt wurden, lassen Sie die Kappe 1 langsam und vorsichtig aus und nehmen Sie diese
mit den Teilen der Kapsel vom Gehäuserohr 2 ab. Die Elektrode 6 kann an der Feder 9 aus der Kappe
gezogen werden. Berühren Sie bitte niemals die Elektrodenfläche mit bloßen Fingern und vermeiden Sie
8
1
1.2
1.1
6
7