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Summary of Contents for Arcam P1
- Page 1 Service Manual Issue 1.0 P1 AmpliÞer ARCAM ARCAM Bringing music & movies to life Bringing music & movies to life...
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Page 2: Circuit Diagrams
Contents List Circuit description Circuit diagrams o L929AY switch PCB o L962AY amplifier main PCB Transformers o L929TX – 115/230VAC toroidal o L927TX – 100VAC toroidal o L907TX – 100VAC frame Exploded view diagram Mechanical & packing parts list Circuit board silk screen & parts list o L929AY switch PCB o L962AY amplifier main PCB... -
Page 3: Product Description
+/- 90-degree phase. down and to disconnect the speaker output under a fault condition, this relay is controlled by the Micro at location IC1 as the P1 has no manual speaker switching capabilities the micro will automatically initialise the speaker relay 3... - Page 4 CON4. Applying a 12v trigger signal to strap circuit. This supply is exceptionally quite either (or both) trigger inputs on the SKT2 and is critical to the sound quality of the P1. instructs the microcontroller to enable or disable the power amplifier. The trigger will Amplifier Stage be seen as a HI line on Pin 11 of CON 4.
- Page 5 supply pin currents are half wave-rectified TR103 provides a 4.7v bias voltage to allow versions of the drive current of the amplifier. the following pre-driver stage to operate in This causes the voltage gain, which is buffered Class A. and passed on to the outputs. The feedback from pin 1 of IC101 acts to reduce the gain of the TR123 and TR125 form a Class A pre-driver amplifier;...
- Page 6 Protection circuit block RTH100 is low when the amplifier is cool typically a few hundred ohms, in the event of a The P1 Power amplifier incorporates 4 modes of thermal overload situation (Above 110 c) protection these are as follows.
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Page 7: Test Specification
0.05% THD+N TLO 72 Bias setting notes The bias of the P1 is set using an Audio precision audio analysis package and we calibrate the power stage for minimum THD the bench set up procedure follows. - Page 8 ITEM1 L929PB Blank PCB P35/P1 FMJ Amp Microcontroller Board +5V_D CON1 +5V_D 0W25 0W25 0W25 BC556B BC556B 0W25 SPARE1 STANDBY SPKR1 ON BC556B BC556B SPKR2 ON TO-92 TO-92 THERMPROT 1 TO-92 TO-92 VIPROT 1 HT48R30A-1 DCPROT 1 L019SW AC PRESENT...
- Page 9 Cover For FHLDR5 ITEM7 F022 Fuseholder Cover For 20mm Fuseholder Cover For FHLDR6 ITEM8 L962PB Blank PCB P1 Amplifier Main Board ITEM9 E802AP Pad Damping 15x6x3MM Sorbo hane See Assy Drawing for location ITEM10 E826AP Pad Damping 7 5x6x3 Sorbo hane...
- Page 10 MOLEX 5229-NCPB 70R@100MHz CHASSIS2 DRAWING TITLE 03_E249 22/08/03 Stability mods DGND AGND_RC P1 Amplifier Main PCB 100N 03_E203 16/07/03 Production Release, VI Limiting changes 0805 Filename: L962CT2 2.0 PSU and Control.Sch 03_E184 23/06/03 Changed sorbothane part numbers, corrected R179-182, R185-187...
- Page 11 R117 R115 100R 100R DRAWING I LE 03_E2 9 22/08/03 Stab lity mods 0W25 0W25 0W25 P1 Amplifier Main PCB 1206 1206 1206 03_E203 16/07/03 Production Re ease, VI Limiting changes D103 23425 Fi ename: L962C 3_2 0_Power Amplifier sch...
- Page 12 120mm dia max Transformer Specifica ion For 115/230V P1 transformer SECONDARIES Connector Latch Arcam Part Number L926TX COUNTERBORE DIA 25mm BLACK Material Safety Specification 10 9 50.8Vac VP70V 1. Winding Wire to be Grade 2 (130C ra ing) to BS 60317-4 1995...
- Page 13 120mm dia max Transformer Specifica ion For 100V P1 transformer SECONDARIES Connector Latch Arcam Part Number L927TX COUNTERBORE DIA 25mm BLACK Material Safety Specification 10 9 50.8Vac VP70V 1. Winding Wire to be Grade 2 (130C ra ing) to BS 60317-4 1995...
- Page 16 P1 Mechanical and packing parts list Part No Item no Description GENERAL MECHANICAL PARTS E200AY Rear Panel Assembly FMJ P1 E212AY FMJ A32 Chassis Assembly E822PM1 Foot Black Alpha E907MC Koolpad O/P Device Diva A85 E912MC Clamp 85 Amp Transistor...
- Page 18 P1 Amplifier display cct board L929AY issue 2.0 Designator Part Description 2A410 Capacitor Ceramic 5mm Pitch 50V 10% 100nF 2A410 Capacitor Ceramic 5mm Pitch 50V 10% 100nF 2A410 Capacitor Ceramic 5mm Pitch 50V 10% 100nF 2A410 Capacitor Ceramic 5mm Pitch 50V 10% 100nF...
- Page 20 P1 Amplifier main cct board L962AY issue 2.1 Designator Part Description 2K233 Capacitor X1 Y2 Rated Ceramic 7.5mm Pitch 3N3 250V 2K233 Capacitor X1 Y2 Rated Ceramic 7.5mm Pitch 3N3 250V 2K233 Capacitor X1 Y2 Rated Ceramic 7.5mm Pitch 3N3 250V 2K233 Capacitor X1 Y2 Rated Ceramic 7.5mm Pitch 3N3 250V...
- Page 21 P1 Amplifier main cct board L962AY issue 2.1 Designator Part Description C125 2N647B Capacitor Radial Electrolytic Dia 10mm Pitch 5mm 47UF 100V C126 2DA210 Capacitor Boxed Polypropylene 5mm Pitch 100V 5% 1N0 C127 2P710AC Capacitor Radial Electrolytic Elna ROA Series 100UF 25V...
- Page 22 P1 Amplifier main cct board L962AY issue 2.1 Designator Part Description DBR6 3BGBU8D Diode Bridge Rectifier GBU8D Plastic Package 8A 200V DBR100 3BW02 Diode Bridge Rectifier W02G Plastic Package 3CW34V7 Zener Diode 0.25W Surface Mount BZX84C4V7 SOT-23 Package DZ100 3CW34V7 Zener Diode 0.25W Surface Mount BZX84C4V7 SOT-23 Package...
- Page 23 P1 Amplifier main cct board L962AY issue 2.1 Designator Part Description 1A310 Resistor 1206 Surface Mount 0.25W 1% 10K 1E310 Resistor Carbon Film 1W 5% 10K 1E310 Resistor Carbon Film 1W 5% 10K R100 1A010 Resistor 1206 Surface Mount 0.25W 1% 10R...
- Page 24 P1 Amplifier main cct board L962AY issue 2.1 Designator Part Description R158 1A210 Resistor 1206 Surface Mount 0.25W 1% 1K0 R159 1A210 Resistor 1206 Surface Mount 0.25W 1% 1K0 R160 1A210 Resistor 1206 Surface Mount 0.25W 1% 1K0 R161 1A022 Resistor 1206 Surface Mount 0.25W 1% 22R...
- Page 25 P1 Amplifier main cct board L962AY issue 2.1 Designator Part Description TR11 4D10KN Digital Transistor MMUN2211LT1 SOT23 Package TR100 4AFMMT497 Transistor FMMT497 SOT23 Package TR101 4AFMMT497 Transistor FMMT497 SOT23 Package TR102 4AFMMT497 Transistor FMMT497 SOT23 Package TR103 4AFMMT497 Transistor FMMT497 SOT23 Package...
- Page 26 ARCAM All parts can be ordered via spares@arcam.co.uk Pembroke Ave, Waterbeach, Cambridge, CB5 9PB, ENGLAND TEL: +44(0) 1223 203 203 FAX: +44(0) 1223 863 384...