AV8 Digital Board

Introduction

Refer to circuit diagram L896 sheet 1

The AV8 digital board is the heart of the AV8 surround sound decoder. It includes the H8S system control micro, the RS232 interface chip, the two Crystal DSPS one used for the surround sound decoding the other for THX post processing, a SPDIF receiver, four DACS, the bass redirection multiplexers and one ADC along with the associated support circuits and Power supply.

Connections

SK100 ADC input

Pin1

AGND

Pin2

Analogue right input

Pin3

AGND

Pin4

Analogue left input

Pin5

AGND

SK102 DAC output for left, right, centre and sub

Pin1

DACL

Pin2

DACGL

Pin3

DACR

Pin4

DACGR

Pin5

DACC

Pin6

DACGC

Pin7

DACS

Pin8

DACGS

SK103 DAC output for left / right surround and left / right surround back

Pin1

DACLS

 

Pin2

DACGLS

 

Pin3

DACRS

 

Pin4

DACGRS

 

Pin5

DACLSB

 

Pin6

DACGLSB

 

Pin7

DACRSB

 

Pin8

DACGRSB

 

SK900 connections to video board

 

Pin1

VIDSD - video serial data

 

Pin2

DGND - digital ground via 22R

 

Pin3

VIDSCLK - video serial clk

 

Pin4

DGND - digital ground via 22R

 

Pin5

VIDCL - video comp latch

 

Pin6

VIDSL - video svid latch

 

Pin7

SPDIFL - spdif latch

 

Pin8

VIDZCS - video zone2 cs

 

Pin9

VIDOC - video osd cs

 

Pin10

Z2 VID - zone2 video in present

 

Pin11

OSDVID - osd video in present

 

Pin12

PROG - Program

 

Pin13

VSYNC - vsync

 

Pin14

DGND - digital ground via 22R

 

Pin15

VSYNCZ2 - vsync zone2

 

Pin16

DGND - digital ground via 22R

 

Pin17

CSYNC - comp sync

 

Pin18

DGND - digital ground via 22R

 

Pin19

SPDIFRX - spdif rxn

 

Pin20

DGND - digital ground via 22R

 

Pin21

RX DATA - rxdata

 

Pin22

SIGGND - signal ground

 

Pin23

TXDATA - txdata

 

Pin24

DGND - digital ground via 22R

 

Pin25

DEM1 - demod1

 

Pin26

DGND - digital ground via 22R

 

Pin27

DEM2 - demod2

 

Pin28

DGND - digital ground via 22R

 

Pin29

SPDIFATX - spdif adc tx

 

Pin30

DGND - digital ground via 22R

 

SK901 connections to display board

 

Pin1

0VF2GND

 

Pin2

P5VF2

 

Pin3

P36VF1

 

Pin4

0VF1GND

 

Pin5

DISPBLK

 

Pin6

DGND

 

Pin7

DISPLAT

 

Pin8

DGND

 

Pin9

DISPCLK

 

Pin10

DGND

 

Pin11

DISPDAT

 

Pin12

P3V3D

 

Pin13

FCK2 - fclock2

 

Pin14

FCK1 - fclock1

 

Pin15

DGND

 

Pin16

IRFP - irfp in

 

Pin17

LEDEN - led enable

 

Pin18

PHB - phase B

 

Pin19

PHA - phase A

 

Pin20

KEYB2 - keyB2

 

Pin21

KEYB1 - keyB1

 

Pin22

KEYB0 - keyB0

 

Pin23

P5VD

 

Pin24

KEYBL - keyboard latch

 

Pin25

DGND

 

Pin26

LEDL - led latch

 

Pin27

DGND

 

Pin28

KEYBCK - keyboard clock

 

Pin29

DGND

 

Pin30

KEYBD - keyboard data

 

SK902 connections to audio board

 

Pin1

PHINS - phones inserted 3V3

 

Pin2

DGND - digital ground via 22R

 

Pin3

AUDSD - aud sdata

 

Pin4

DGND - digital ground via 22R

 

Pin5

AUDSCK - aud sclock

 

Pin6

DGND - digital ground via 22R

 

Pin7

AUDSEL0 - aud sel 0

 

Pin8

DGND - digital ground via 22R

 

Pin9

AUDSEL1 - aud sel 1

 

Pin10

DGND - digital ground via 22R

 

Pin11

AUDSEL2 - aud sel 2

 

Pin12

DGND - digital ground via 22R

 

Pin13

AUDCTRL - aud control enable

 

Pin14

DGND - digital ground via 22R

 

Pin15

DGND - digital ground via 22R

 

Pin16

DGND - digital ground via 22R

 

Pin17

DGND - digital ground via 22R

 

Pin18

DGND - digital ground via 22R

 

Pin19

DGND - digital ground via 22R

 

Pin20

DGND - digital ground via 22R

 

Pin21

DGND - digital ground via 22R

 

Pin22

DGND - digital ground via 22R

 

Page 36
Image 36
Arcam AV8 service manual Introduction Refer to circuit diagram L896 sheet, Connections

AV8 specifications

The Arcam AV8 is a high-performance audio-video receiver that has garnered attention for its exceptional sound quality and versatile features, making it a sought-after option for both audiophiles and home theater enthusiasts. Designed to provide an immersive viewing experience, the AV8 is equipped with a range of technologies that enhance its performance.

One of the standout features of the Arcam AV8 is its support for high-definition audio formats. The receiver can decode various lossless audio formats, including Dolby TrueHD and DTS-HD Master Audio, allowing users to experience studio-quality sound. This capability is complemented by its advanced digital signal processing, which ensures that the audio output is clear and dynamic, enhancing the overall entertainment experience.

The AV8 is built with an emphasis on connectivity and flexibility. It boasts multiple HDMI inputs and outputs, facilitating seamless connections to a variety of devices such as Blu-ray players, gaming consoles, and streaming devices. With support for 4K video pass-through, the AV8 is future-proofed for high-definition content, ensuring compatibility with the latest video technologies.

Another notable aspect of the Arcam AV8 is its user-friendly interface. The receiver is equipped with an intuitive on-screen display that simplifies navigation and setup. Additionally, Arcam has incorporated room calibration technology, which analyzes the acoustic properties of the listening environment and adjusts the audio output accordingly. This feature allows for optimal sound reproduction, tailored to the specific characteristics of the room.

The build quality of the AV8 is exceptional; it features a robust chassis designed to minimize vibration and interference, ensuring high-fidelity sound reproduction. The receiver is designed for ease of use, with remote control functionality and smart home integration options, making it convenient to operate alongside other devices.

In summary, the Arcam AV8 is a powerful AV receiver that combines high-definition audio capabilities, extensive connectivity options, and user-friendly features. With its strong emphasis on sound quality and innovative technologies, it stands out in the competitive landscape of home theater equipment, catering to the discerning tastes of audio enthusiasts and casual users alike. Whether for music or movie playback, the AV8 offers a compelling solution for those seeking an elevated audio-visual experience.