AKG D 3800 & D 3900 Microphone Service Information
Product Overview
This document provides essential service information, a detailed parts list, and repair guidance for the AKG D 3800 and D 3900 microphones.
Microphone Diagram and Components
The diagram illustrates the internal construction of the AKG D 3800/D 3900 microphones. Key components are identified by numbers:
- 1: Grille cap (Gitterkappe)
- 2: Foam insert (Schaumeinlage)
- 3: Support basket (Stützkorb)
- 4: Capsule, DKC 24 (Kapsel, DKC 24)
- 5: Insert (Einlage)
- 6: Microphone housing (Mikrofongriff)
- 7: Connector/Plug (Steckereinsatz)
- 9: PCB Assembly (Print, kpl.)
- 9.1: Switch (Schalter)
- 9.2: Plug insert (Steckereinsatz)
- 10: Switch cover (Schalterblende)
- 11: Basket (Korb)
- 12: Switch holder (Halterung)
Internal circuitry includes capacitors (C1, C2) and resistors (R1, R2).
Circuit Diagrams
Electrical schematics are provided for the D 3900 and D 3800/D 3800S models, detailing in-phase connections and component layouts.
Parts List
| Description | Item | Order Number | Quantity (D 3800) | Quantity (D 3800S) | Quantity (D 3900) |
|---|---|---|---|---|---|
| Grid cap | 1 | 2505 M 0101 | 1 | 1 | 1 |
| Foam insert | 2 | 2505 2 1801 | 1 | 1 | 1 |
| Support basket | 3 | 25052 0501 | 1 | 1 | 1 |
| Capsule, DKC 24 | 4 | 2224 Z0004 | 1 | 1 | 1 |
| Insert | 5 | 2505 Z 1601 | 1 | 1 | 1 |
| Housing | 6 | 2505 Z 0102 | 1 | ||
| Housing | 6 | 2505 Z0101 | 1 | ||
| Housing | 6 | 2505 Z0103 | 1 | ||
| Screw M2,5x8 | 7 | 0966 D 2503 | 1 | 1 | 1 |
| Switch lever | 8 | *) 2505 Z 2401 | 1 | ||
| PCB Assembly | 9 | 2505 M 0201 | 1 | 1 | 1 |
| Switch | 9.1*) | 0040 E 0125 | 1 | ||
| Switch | 9.1*) | 0040 E 0120 | 1 | ||
| Plug insert | 9.2 | 0016 E 0355 | 1 | 1 | 1 |
| Capacitor 150nF | C1 | 0035 E 1506 | 1 | ||
| Capacitor 47nF | C2 | 0034 E 4703 | 1 | ||
| Resistor 3,3kOhms | R1 | 0004 E 3306 | 1 | ||
| Resistor 1kOhms | R2 | 0004 E 1006 | 1 | ||
| Switch cover | 10 | 2505 Z 1401 | 1 | ||
| Basket | 11 | 2505 Z0301 | 1 | 1 | 1 |
| Switch holder | 12 | 2506 Z 1401 | 1 | ||
| Litz wire, sw, per m | -- | 1801 Z 6505 | X | X | X |
| Litz wire, bn, per m | -- | 1801 Z 6508 | X | X | X |
| Case, compl. | -- | 3828 P 0532 | 1 | 1 | |
| Label for case | -- | 9110 U 2424 | 1 | ||
| Label for case | -- | 9110 U 2425 | 1 | ||
| Label for case | -- | 9110 U 2531 | 1 | ||
| Carrying bag | -- | 1603 P 0001 | 1 | 1 | 1 |
| Stand adapter | SA61/1 | 6001 Η 6101** | 1 | 1 | 1 |
*) These parts are cemented together. If necessary please order both parts.
**) Sales item / Vertriebsware
Repair Instructions
To open the microphone:
- Press the grille cap (1) firmly against your palm.
- Simultaneously turn the microphone housing (6) counterclockwise until the cap disengages.
- The support basket (3) is disengaged by turning it clockwise.
- The capsule (4) is inserted into the microphone housing.
The grille cap (1) and foam insert (2) can be washed in soapy water. Ensure all parts are completely dry before reinstalling.
Wiring Instructions
The brown wire is designated as the "inphase" connection. With the capsule held upright and the membrane facing up, connect this wire to the center solder tag on the capsule body. This tag also connects to the hum compensation coil.
The black wire should be connected to the left solder tag on the capsule body. The right solder tag remains unconnected and serves as a solder post between the voice coil and the hum compensation coil.
On the connector, pin 2 is the "inphase" connection. When replacing the connector, ensure that pin 1 is correctly connected to the grounding tag.
Company Information
AKG Acoustics GmbH, A Harman International Company, Lemböckgasse 21-25, A-1230 Wien, Austria
Phone: (+431) 86654-1519, Fax: (+431) 86654-1514, e-mail: service@akg.com
