Text preview for : Arcam-DV29-dvd-sm.pdf part of ARCAM Arcam-DV29-dvd-sm ARCAM DV29 Arcam-DV29-dvd-sm.pdf
Back to : Arcam-DV29-dvd-sm.pdf | Home
Service
Manual
Issue 1.0
DV29 DVD Player
ARCAM
Bringing music & movies to life
DV29
Contents List
Circuit Description
Power Supply L959AY
! CCT diagram
! Component layout diagram
! Parts list
Main Board L971AY
! CCT diagram
! Component layout diagram
! Parts list
Display Board L972AY
! CCT diagram
! Component layout diagram
! Parts list
Transformers
! L924TX
! L925TX
! L931TX
Mechanical Assembly
! Mechanical and packing part list
FMJ Dv29 Circuit description.
Overview
Fig 1 PSU clock control and IC305 line status
The DV29 is effectively a no compromise version both
electronically and mechanically of the DV79. Fs PSUFS1 PSUFS0 PSUCLK
Frequency Pin 11 Pin 12 Output Pin 5
The player is based around acclaimed Zoran Vaddis select IC305a IC305a of IC305a
V chipset coupled to high specification Wolfson D to A 44.1 kHz 0 0 44.1 kHz
converters for all six audio output channels, also 48 kHz 0 0 48 kHz
88.2 kHz 0 1 44.1kHz
featured in this design is a HDMI transmitter with
96 kHz 0 1 48 kHz
digital Video and a Audio output capable of Digital 176.4 kHz 1 0 44.1 kHz
Surround. 192 kHz 1 0 48 kHz
Others 1 1 OFF
The DV29 and the DV79 use the same main board
and power supply stage but with many of the The PSU sync signal is driven into the power supply via
components either upgrade or replaced with different Resistor R9 if no Sync is present the unit is set to free run at
topologies, many of the critical audio/video xxxx due to the RT/RC network attached to Pin 4.
components with 0.1% tolerance within the DV29 and
we also have an extra toroid power supply for the IC1 is running in regulated mode and monitors the voltage
Audio stages. output on the +5V and +3V3 D.C lines, the two voltages are
summed by TR8 and Driven into the VFB and Comp inputs
Both the HDMI chip and Video encoder are of a higher of IC1, the Voltage is then regulated by changing the time
quality than those found inside the DV79. base of the PWM output at pin 6 (longer the time base the
lower the voltage), the PWM switching frequency is driven
Power supply board. into the switch-mode transformer by the high speed Nmos
device at position M1, R5 is used to sense the Current
Non-switching across the gate of the Nmosfet and in the event of a short
circuit will safely shut the power supply down. We derive the
Mains power arrives at IEC inlet socket SKT1 and is 12v Mech supply from the output of M1 using the Ultra-fast
filtered by EMC choke LI and Y caps C3 and C4, Diode at location D8 to rectify the PWM line.
mains switch SW2a/b switches both Negative and Live
phases before the power reaches the mains select The D.C outputs from the switch mode have extensive
switch at location SW1 the switch allows the primary switch mode noise removing filters these are seen as 100n
windings of the transformer TX1 to be wired in either caps down to ground and Wire wound inductors in series
Parallel or Series configuration. with the supply rail.
The Bridge rectifying Diode package at location D1 Power supply main board
forms the basis of the conventional power stage and
supplies a VN35V6 (-35.6v) to the Switch mode All the power supply rails are supplied to the main board via
stage, transistor TR1 is biased by 2v7 Zener diode the 32 way FFC conector at location CON1001.
DZ1 and allows for the series Zener diodes DZ2, DZ3,
DZ3 to supply the VN13V5 and VN19V rails. The Digital supplies from the switch mode stage of the
power supply arrive as 3V3D, +5VD and +12VD we also see
We will also see a simple A.C present circuit this is the Display board power supplies arrive as