ARKAM Diva CD73 free download

File name ARKAM diva CD73 service manual issue_1.0.pdf

DiVA Service Manual Issue 1.0 CD73 Compact Disc player ARCAM Bringing music & movies to life Diva CD73 Circuit description. By Andy Moore. Overview The CD73 is a completely new design platform for Arcam although the circuit building blocks will show a passing resemblance to the earlier Diva designs; the main difference is that the mechanism control circuitry is now incorporated within the main circuit board design of the CD player. Power supply and Power supply control. The mains power supply enters the player via the IEC socket at location SK501 and is filtered by Y Caps C501 ­ C502 and X Cap C503, resistor R501 sits between the Neutral and Positive a.c supply rails. L501 and L502 filter electromagnetic noise and reduce stray E.M.F. SW501 A/B is used to switch the primary feed to the transformer at location TX501, capacitors C504 and C505 help to prolong the life expectancy of the mains switch by reducing contact sparks. The transformer at location TX501 has multiple windings and allows for operation from 115v or a 230v mains supply, the mains select switch at location SW502 connects the duel primaries in series or parallel depending on the supply requirements. For 100v operation remove J504 and J503 and fit J502 and J501. Please note: The Primary of the transformer is internally fused at 117 degrees C. Fig 1. Power supply identification and related components. Power supply name AC1 ­ AC2 +11V(U) D.C +8V D.C -30VF F1 ­ F2 +12V(A) - 12V(A) +5V(A)=(DAC) +5V(D) +3.6V(D) Associated components On/Off mute circuit. DAC card Option at SK203. U102 (tray control) U202 (laser optic ­ spindle motor). Relay RLY501 analogue supply switch. Filament display grid. Filament A.C supply. Audio output op-amps U403, U404, U405 and DAC card option at SK203. Audio output op-amps U403, U404, U405 and DAC card option at SK203. DAC at location U401 and DAC card option at location SK203. Digital control devices U101, U301, U402, U406, U407, U701 and DAC card option at SK203. DSP at location U201, Focus/Tracking and sledge control at location U101. We will now breakdown the power supplies down individually, please refer to Fig 1 for information on key components driven by the individual power supply section. Digital Power supplies AC1 ­ AC2 are used to drive the Audio mute and fast power down control of the Audio output relay at location RLY 401, Diodes D518 and D519 rectify the A.C and the following R ­ C network and transistor switch stage Q501 ­ Q505 allowing for the delayed switch on (+ 4 secs) and instant power down of the Audio output relay the control line is seen as RLYPWR on the circuit diagram and should measure +10v D.C at Jumper PL402. The +11V(U) supply rail is protected by fuse FS501 and will only be used directly when an additional DAC card is added; we use this supply rail within the CD73 to derive the +8V using U502 and reservoir capacitor C513, the +8V supply feeds the Tray control and Laser optic drive packages at location U102 and U202. The -30VF D