ARCAM hfe arcam diva dt81 service en free download

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Service Manual DT81 Issue 1.0 DiVA DT81 Digital Radio Tuner ARCAM Contents List ! Contents list ! Circuit description ! Service guide ! Circuit diagrams ! Component overlays ! Circuit board parts list ! General assembly parts list Z201 is the SPDIF transmitter. Each one of the differential ouputs is DT81 Circuit Description used separately. SPDIF_OP is for the optical output, SPDIF_CX is for the coax output. Summary The L918 forms the basis of the DT81 DAB tuner. All the circuitry DAC of the tuner is on the same board, with the exception of the front panel PCB. Z101 is a CS4327 D-A converter, followed by filter/buffer Z102. The tuner is based on the Roke Manor gold card which provides the This is followed by ac coupling capacitors. The relay RLY1 is the RF receiver and DAB decoding. To accompany this module the DAB last stage before the phono output connectors. 2 stereo outputs are motherboard has various power supplies, a Hitachi H8 provided on SK101. SK102 is an input which gets routed through the microcontroller, a D-A converter with output buffer, and an SPDIF relay when the relay is off. transmitter. An external FM tuner can be connected to this, in order to avoid taking up an extra input on the amplifier. When the tuner is off or in bypass mode, the FM tuner is routed to the output. Power supplies and muting The digital audio outputs are also shown on this sheet. TX101 and associated components provide an isolated unbalanced SPDIF output The mains transformer T1 is used for 230V and 115V operation, the on SK103, and Z4 produces an optical output. voltage selection is done by fitting different fuses. F1 160mA is fitted for 230V and F2 250mA for 115V. The front panel board is powered from the 7.5V unregulated supply (it has its own regulator). The digital supplies are switched by SW3, Software notes while the analogue supplies are on all the time while the mains is connected. The system has non volatile storage in the form of the EEPROM,