8-1
8-1
COMBI BOARD
TABLE OF CONTENTS
Brief Introduction .................................................................... 8-1
Top View Layout ..................................................................... 8-2
Bottom View Layout ................................................................ 8-3
Circuit Diagram (Part 1) .......................................................... 8-4
Circuit Diagram (Part 2) .......................................................... 8-5
Circuit Diagram (Part 3) .......................................................... 8-6
Electrical parts list ................................................................... 8-7
Brief introduction of the Combi Board
The Combi Board consists of both audio signals processing part (AF Part) and microprocessor controlling part (Control Part).
a. Audio Processor IC TDA7468D
Audio Processor IC TDA7468D includes functions such as source selection, loudness control, bass control, treble control and
muting function. Sound features such as IS are controllable via I2C bus. All input sources are used namely, Stereo 1-4 and
Differential input. Mono input is unused and terminated to ground via capacitor.
b. Line out
Line out cinch is included for connection to external devices such as amplifier, recorder etc.
c. Simple Incredible Surround (SIS)
Incredible surround effect using external circuit to create phase shifting and spatial effect.
d. Headphone Amplifier
A Headphone can be driven by Op-amp NJM4556AM.
e. Headphone Sensing
Headphone sense circuit is for muting main speaker when headphone is plugged in.
f.
CD Standby Control
Control circuit that switches on the supply to CD servo IC, HF circuit and laser light pen in CD mode only.
g. CD_ON Control
This switches on the +5V_CD (derived from +5V6) to the CD module.
Summary of Contents for EMOTIVE Micro MZ-1000
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