Service Manuals, User Guides, Schematic Diagrams or docs for : ARCAM DV79 Arcam-DV79-dvd-sm

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.



Image preview - the first page of the document



>> Download Arcam-DV79-dvd-sm documenatation <<

Text preview - extract from the document

DiVA          Service
              Manual
              Issue 1.0



DV79 DVD Player




                          ARCAM
                          Bringing music & movies to life
  DV79
Contents List

                Circuit Description

                Power Supply L959AY
                     ! CCT diagram
                     ! Component layout diagram
                     ! Parts list

                Display Board L961AY
                      ! CCT diagram
                      ! Component layout diagram
                      ! Parts list

                Main Board L967AY (for serial numbers below D79V03175)
                      ! CCT diagram
                      ! Component layout diagram
                      ! Parts list

                Main Board L974AY (for serial numbers above D79V03174)
                      ! CCT diagram
                      ! Component layout diagram
                      ! Parts list

                Transformers
                      ! L924TX
                      ! L925TX

                Mechanical Assembly
                     ! Exploded view diagram
                     ! Mechanical and packing part list
Diva Dv79 Circuit description.


Overview

The DiVa DV/79 is a completely new design platform          Fig 1 PSU clock control
and only shares it power supply board and display
board with the DV78.                                         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 and a           48 kHz        0          0          48 kHz
                                                             88.2 kHz      0          1          44.1kHz
extremely high quality digital video encoder also
                                                             96 kHz        0          1          48 kHz
featured in this design is a HDMI output digital Video.      176.4 kHz     1          0          44.1 kHz
                                                             192 kHz       1          0          48 kHz
Power supply board.                                          Others        1          1          OFF

Non-switching                                             The PSU sync signal is driven into the power supply via
                                                          Resistor R9 if no Sync is present the unit is set to free run at
Mains power arrives at IEC inlet socket SKT1 and is       xxxx due to the RT/RC network attached to Pin 4.
filtered by EMC choke LI and Y caps C3 and C4,
mains switch SW2a/b switches both Negative and Live       IC1 is running in regulated mode and monitors the voltage
phases before the power reaches the mains select          output on the +5V and +3V3 D.C lines, the two voltages are
switch at location SW1 the switch allows the primary      summed by TR8 and Driven into the VFB and Comp inputs
windings of the transformer TX1 to be wired in either     of IC1, the Voltage is then regulated by changing the time
Parallel or Series configuration.                         base of the PWM output at pin 6 (longer the time base the
                                                          lower the voltage), the PWM switching frequency is driven
The Bridge rectifying Diode package at location D1        into the switch-mode transformer by the high speed Nmos
forms the basis of the conventional power stage and       device at position M1, R5 is used to sense the Current
supplies a VN35V6 (-35.6v) to the Switch mode             across the gate of the Nmosfet and in the event of a short
stage, transistor TR1 is biased by 2v7 Zener diode        circuit will safely shut the power supply down. We derive the
DZ1 and allows for the series Zener diodes DZ2, DZ3,      12v Mech supply from the output of M1 using the Ultra-fast
DZ3 to supply the VN13V5 and VN19V rails.                 Diode at location D8 to rectify the PWM line.

We will also see a simple A.C present circuit this is     The D.C outputs from the switch mode have extensive
used for delayed output relay operation and fast relay    switch mode noise removing filters these are seen as 100n
closure under interrupted supply conditions thus          caps down to ground and Wire wound inductors in series
preventing power down op-amp offsets from reaching        with the supply rail.
the Audio output sockets.
                                                          Power supply main board
Switch mode
                                                          All the power supply rails are supplied to the main board via
The switch mode supply is formed around the               the 32 way FFC conector at location CON1001.
Driver/Control chip IC1 UC3843 (used in regulating
mode). The chip is referenced the 

◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo