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Dynacord DPA 4245 Service Manual

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SERVICE MANUAL
DPA 4245 / DPA 4260 POWER AMPLIFIER

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Summary of Contents for Dynacord DPA 4245

  • Page 1 SERVICE MANUAL DPA 4245 / DPA 4260 POWER AMPLIFIER...
  • Page 2 MEASUREMENT SPECIFICATIONS: DPA power amplifiers complete appliance Names of the individual printed board assemblies and their corresponding EDP numbers: EDP numbers of the main boards DPA 4245 DPA 4260 84 188 84 189 Board section Index Main PCB Supply PCB LED PCB Input-PCB (index 1) and Output-PCB (Index 2) are located on the printed board assembly 81340.

  • Page 3: Idling Current Adjustment

    Nominal load impedances 100V output 70V output 25V output DPA 4245 28,5 DPA 4260 1,25 1. Operation voltage: U(B) = 230V / 50Hz ... 60Hz 2. Deviation limit of the operation voltage: -30% ..+10% 3. Power consumption (both channels driven via the 100V output, f = 1kHz)
  • Page 4 5.2.3. Attack- and release times separately testing the power amplifier channels is mandatory: Test has to be performed at the Direct Output without load. 1.) Drive the power amplifier's input with a burst signal (f = 1kHz, 10 cycles, rate : 3 sec.) and U(E) = +10dBu. 2.) Monitor the output signal via oscilloscope.
  • Page 5 6. Level CHANNEL A B 6.1. VOLTAGE AMPLIFICATION Appliance Input U(E) Measuring point U(A) Load Frequency DPA 4245 CH. A/B 0dBu Direct Out A/B 33.8dBu 37.8V 1kHz DPA 4245 CH. A/B 0dBu 100V Output 42.2dBu 99.2V 1kHz 28.5 DPA 4245 CH.
  • Page 6 - All inputs have to be terminated with 50 each; during the noise interference measurement, the outputs have to be without load Power amplifier Output U(F) U(G) U(A) IN(A) S/N-R. LEVEL control up DPA 4245, 4260 100V -102 DPA 4245, 4260 -102 DPA 4245, 4260 -102 DPA 4245, 4260 Direct -102...
  • Page 11 Seite / Page 1 / 9 Ersatzteilliste - Bill of Materials 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description Zubehör Accessories & packing material 355871 BEDIENUNGSANL. DPA4245/426 user manual DPA4245/4260 300425 KABEL-NETZ 2.0 M 10A...
  • Page 12 Seite / Page 2 / 9 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description CN020 344862 MESSERLST. 8POL connector male 8-pin CN08X 343516 FL.STECKER 4.8/0.5 connector 4.8mm faston CN18X 341937 MESSERLST. 4POL connector male 4-pin...
  • Page 13 Seite / Page 3 / 9 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description C0124 301519 KO-KER 10.0PF 500V 10% cap ceramic 10pF C0125 301474 KO-EL 22.000MF 16V BIP cap bip electr. 22uF/16V...
  • Page 14 Seite / Page 4 / 9 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description D0019 304360 DIODE 1N 4007 GEGURTET diode 1N 4002 D0020 304992 DIODZ BZX 55C 6V8 0.50W diode zener 6V8...
  • Page 15 Seite / Page 5 / 9 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description E0100 354859 RELAIS 793-P-1C-S-24V DC relay 24V E0300 354859 RELAIS 793-P-1C-S-24V DC relay 24V F0001 302582 SICHER T 1...
  • Page 16 Seite / Page 6 / 9 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description Q0115 348421 TRANS 2N 3906 transistor 2N 3906 00010 338869 TRANS MJE 350 transistor MJE 350 00010 338868 TRANS MJE 340...
  • Page 17 Seite / Page 7 / 9 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description Q0323 351981 TRANS MJL 3281 A transistor MJL 3281 A Q0324 351982 TRANS MJL 1302 A transistor MJL 1302 A...
  • Page 18 Seite / Page 8 / 9 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description VR101 348674 WI-TRI 250.00 OHM LIN pot trim 250 Ohm lin VR300 348486 WI-TRI 47.00 KOHM LIN pot trim 47k Ohm lin...
  • Page 19 Seite / Page 9 / 9 121714 DPA 4245 2X450W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description I0100 327197 IC NE 5532 P 2FACH OP IC NE 5532 N I0102 327197 IC NE 5532 P 2FACH OP...
  • Page 20 Seite / Page 1 / 9 Ersatzteilliste - Bill of Materials 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description Zubehör Accessories & packing material 355871 BEDIENUNGSANL. DPA4245/426 user manual DPA4245/4260 300425 KABEL-NETZ 2.0 M 10A power cable Europe 354179 KABELGEHÄUSE 12POL KGS-MS...
  • Page 21 Seite / Page 2 / 9 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description CN020 344862 MESSERLST. 8POL connector male 8-pin CN08X 343516 FL.STECKER 4.8/0.5 connector 4.8mm faston CN18X 341937 MESSERLST. 4POL connector male 4-pin CN20X 344862 MESSERLST.
  • Page 22 Seite / Page 3 / 9 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description C0124 301519 KO-KER 10.0PF 500V 10% cap ceramic 10pF C0125 301474 KO-EL 22.000MF 16V BIP cap bip electr. 22uF/16V C0126 329021 KO-KER...
  • Page 23 Seite / Page 4 / 9 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description D0019 304360 DIODE 1N 4007 GEGURTET diode 1N 4002 D0020 304992 DIODZ BZX 55C 6V8 0.50W diode zener 6V8 D0021 304992 DIODZ BZX 55C 6V8 0.50W...
  • Page 24 Seite / Page 5 / 9 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description E0100 354859 RELAIS 793-P-1C-S-24V DC relay 24V E0300 354859 RELAIS 793-P-1C-S-24V DC relay 24V F0001 302582 SICHER T 1 A 250V fuse 1A slow blow F0002...
  • Page 25 Seite / Page 6 / 9 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description Q0115 348421 TRANS 2N 3906 transistor 2N 3906 00010 338869 TRANS MJE 350 transistor MJE 350 00010 338868 TRANS MJE 340 transistor MJE 340 Q0118 348409...
  • Page 26 Seite / Page 7 / 9 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description Q0321 335763 TRANS 2N 3904 transistor 2N 3904 Q0322 348421 TRANS 2N 3906 transistor 2N 3906 Q0323 351981 TRANS MJL 3281 A transistor MJL 3281 A Q0324 351982...
  • Page 27 Seite / Page 8 / 9 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description R0423 341713 WI-DR 4.70 OHM 4.00W 5% resistor 4.70 Ohm 4watt R0425 341713 WI-DR 4.70 OHM 4.00W 5% resistor 4.70 Ohm 4watt R0427 341713 WI-DR...
  • Page 28 Seite / Page 9 / 9 121715 DPA 4260 2X600W VERST. Pos. Nr. Best. Nr. Ref. No. Part No. Bezeichnung Description D0105 304360 DIODE 1N 4007 GEGURTET diode 1N 4002 D0500 304360 DIODE 1N 4007 GEGURTET diode 1N 4002 D0501 304360 DIODE 1N 4007 GEGURTET...

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Dpa 4260