DPA Type HMA4000 Podręcznik użytkownika - Strona 7
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The Type HMA4000 is fitted with a 250 mA slow blow fuse (DVF0250).
The fuse is rated to give adequate protection at both 110 VAC and 230 VAC.
Only the correct replacement must be fitted.
WARNING! Disconnect the HMA4000 from the mains supply
before removing the instrument casing.
1. The mains fuse holder is located on the printed circuit board of the
HMA4000. To gain access to it, the front and rear face panels of the
HMA4000 should be removed by pulling the top and bottom edges of
the clip on frame outwards (as shown in Fig. 7).
2. Unscrew the two retaining screws on the metal casing of the HMA4000
3. Gently pull out circuit board.
4. Remove the Mains Fuse with a screwdriver and insert a new
Mains Fuse likewise.
Fig. 7.
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User's Manual
Changing the Main Fuse on HMA4000
User's Manual
Care of the HMA4000
Care of the HMA4000
The operating temperature range of Type HMA4000 Two-Channel High-
Voltage Microphone Amplifier is from -10 °C to +55 °C (+14 °F to +131 °F).
The instrument is protected against internal overheating by a self-resetting
thermal switch which operates at 125 °C ±5 °C.
The HMA4000 is extremely robust. It is insensitive to vibration and will
withstand mechanical shock. Therefore the HMA4000 is well suited for
placement on the stage or the studio floor.
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