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Summary of Contents for Diva P1000
- Page 1 DiVA Service Manual Issue 1.0 P1000 Amplifier ARCAM ARCAM Bringing music & movies to life Bringing music & movies to life...
- Page 2 The “A” gain position provides an overall gain of 31.5 dB and is compatible with other Arcam amplifiers. The “B” setting is for use in THX compliant systems and the low gain “C” position can be used to lower the overall system noise level in installations where the speakers are very close to the listener.
- Page 3 Arcam P-1000 Amplifier Board functions and operation In the amplifier portion of the board, Q2 acts as a level shifter and drives the class A transistor Q13. The voltage source for the class A stage is from Q14 and is regulated by Z1.
- Page 4 Arcam P-1000 Amplifier Board functions and operation With the amplifier operating at low output levels (<20 W) only the +/-20V low voltage rails are used. As the output requirements increase, the signal from U2-A also COMM increases and the peak value of this signal is compared to the low rail reference voltage at the comparators U4-A and U5-B.
- Page 5 FIGURE 1 POSITIVE RAIL SWITCHING WAVEFORM FIGURE 2 NEGATIVE GOING WAVEFORM FIGURE 3 BIAS CONTROL AT MAX CCW POSITION...
- Page 6 FIG 4 BIAS PROPERLY ADJUSTED (COLD)
- Page 7 P-1000 Display Board functions and operation. The P-1000 display functions are divided into two separate blocks, power on/off and channel status indications. The power on/off LED indicators are driven by the Standby Power supply on the main board and are active any time the P-1000 is connected to the AC mains supply and the rear panel power switch is on.
- Page 8 Arcam P-1000 Main Board functions and operation In addition to the high current supply voltages for the seven amplifier channels, the Main board also contains the circuitry for power on/off control, DC fault protection, the standby housekeeping power and other control circuits as well as the bussing interconnections to all channels.
- Page 9 Arcam P-1000 Main Board functions and operation To perform these functions an AC mains sine wave from the standby transformer secondary is applied to the input of U2-D. This signal is then half wave LV_AC_IN rectified and the output of gate U2-D is a square wave clock signal to the CLK input of U-1B.
- Page 14 ARCAM P-1000 AMPLIFIER BOARD REVISION A Reference No Part No Description CAPACITOR C1 C45 205-813-4 CAP EL RADIAL 47uF 100V 210-311-4 CAP EL NP 22uF 25V 206-529-4 CAP EL RADIAL .22uF 50V C4 C22 C23 C39 C42 203-038-4 CAP CERAMIC 330pF 1KV 20%...
- Page 15 RES CF 1/4W 5% 2 OHM .4" 114-004-0 RES 5W WW 5% .2 OHM 114-004-0 RES 5W WW 5% .2 OHM 103-064-4 RES CF 1/4W 5% 470 OHM .4" ARCAM P-1000 AMPLIFIER BOARD REVISION A Reference No Part No Description 103-064-4 RES CF 1/4W 5% 470 OHM .4"...
- Page 16 RES MOX 5.1 OHM 1W 103-104-4 RES CF 1/4W 5% 22K .4" 103-103-4 RES CF 1/4W 5% 20K .4" 103-113-4 RES CF 1/4W 5% 51K .4" ARCAM P-1000 AMPLIFIER BOARD REVISION A Reference No Part No Description 103-113-4 RES CF 1/4W 5% 51K .4"...
- Page 17 Reference No Part No Description 322-010-0 IC TLO82 DUAL OPAMP U2 U3 U6 322-007-0 IC 4560 DUAL OPAMP DIP U4 U5 322-029-0 IC LM393 DUAL COMP ZENER 303-025-0 DIODE ZEN 4758 54V .4" 303-004-0 DIODE ZEN 4738 8.2V .4" Z3 Z4 303-010-0 DIODE ZEN 4754 39V .4"...
- Page 20 ARCAM P-1000 DISPLAY BOARD REVISION A Reference No Part No Description DIODE 307-010-0 DIODE LED YEL/GRN D9 D10 D11 302-001-4 DIODE 1N4148 SIGNAL .4" D2 D3 D4 D5 D6 D7 D8 307-010-0 DIODE LED YEL/GRN TRANSISTOR Q1 Q2 311-009-0 TRANS MPSA06 NPN TO-92...
- Page 24 ARCAM P-1000 MAIN BOARD REVISION A Reference No Part No Description CAPACITOR C1 C2 202-101-4 CAP MYLAR .001uF 100V 5% C3 C9 C51 202-124-4 CAP MYLAR .082uF 100V 5% C4 C10 C30 205-509-4 CAP EL RADIAL 10uF 50V C5 C55...
- Page 25 RES CF 1/4W 5% 10 OHM .4" 103-024-4 RES CF 1/4W 5% 10 OHM .4" 101-096-0 RES CF 1/8W 5% 10K .35" 103-111-4 RES CF 1/4W 5% 43K .4" ARCAM P-1000 MAIN BOARD REVISION A Reference No Part No Description 103-123-4 RES CF 1/4W 5% 130K .4"...
- Page 26 321-009-0 IC4093 QUAD NAND GATE 325-002-0 IC MCO3011 OPTOCOUPLER DIP6 324-002-0 IC 7912 LINEAR REG 12V NEG 324-001-0 IC 7812 LINEAR REG 12V POS ARCAM P-1000 MAIN BOARD REVISION A Reference No Part No Description MISC CON7-10 14 20 25...
- Page 31 ARCAM P-1000 FINAL ASSEMBLY REVISION A Item Part Description Part No Where Used HEX NUT 10MM SUPPLIED WITH TRANSFORMER LOCATING WASHER SUPPLIED WITH TRANSFORMER RUBBER MTG GASKET SUPPLIED WITH TRANSFORMER TRANSFORMER 800VA 115V 356-123-0 US/CAN MODEL TRANSFORMER 800VA 230V 356-223-0...
- Page 32 Item Part Description Part No Where Used WIRE 18GA TEW BLU 3.5" 413-030-0 USE WITH BRIDGE RECT WIRE 18GA TEW BLK 4" 413-031-0 PWR SW TOP TO FUSE END TERM WIRE 18GA TEW BLK 5.5" 413-032-0 PWR SW BOT TO AC LINE BOT WIRE 18GA TEW BLK 13.25"...
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