Daewoo AKD-80C, Service Manual

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DAEWOO
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General I/O pin 2.This controls the commands from the microcontroller.When not
used,either set this as an input port and connect to 0V, or set this as an output port
and leave it open.
I/O
CONT2 33
PIN
No
General I/O pin4.This controls the commands from the microcontroller.This pin is
shared exclusively with the sub code frame sync signal output(SFSY).When not
used,either set this as an input port and connect to 0V,or set this as an output port
and leave it open.
General I/O pin4.This controls the commands from the microcontroller.This pin is
shared exclusively with the sub code P,Q,R,S,T,U,V,W output(PW).When not
used,either set this as an input port and connect to 0V,or set this as an output port
and leave it open.
General I/O pin3.this controls the commands from the microcontroller.This is
shared exclusively with the sub code read clock input(SBCK).When not
used,either set this as an input port and connect to 0V, or set this as an output port
and leave it open.
16.9344 MHz output
4.2336 MHz output
Digital output EIAJ format.
Test input.Equipped with internal pull-down resistor.Must be connected to 0v
G1,G2,one error, two error correction monitor output
7.35KHz sync signal output(frequency divided from the crystal oscillator)
Sub code block sync signal output
Test input.Equipped with internal pull-down resistor.Must be connected to 0v
Deemphasize monitor output.When high level, a deemphasize disc is being played back.
G2 flag output
Tracking error Test output.Under normal operation ,this should be left open.
DRAM switch:high: 1M, low:4M
Test input.Must be connected to 0V
Test input.Must be connected to 0V
L channel mute output
L channel power supply
L channel output
L channel ground.Must be connected to 0V
R channel output
R channel power supply
R channel mute output
Crystal oscillator power supply
16.9344 MHz crystal oscillator connection.
Crystal oscillator ground. Must be connected to 0V
Read/write control input.Schmidt input.
Microcontroller command input.
34
CONT3/
SBCK
I/O
35
36
37
PIN NAME I/O
I/O
I/O
O
I
O
I
O
O
O
O
O
O
O
I
I
I
O
P
AO
P
AO
P
O
P
O
I
P
I
I
FUNCTION
CONT4/
SFSY
CONT5/
PW
SBSY
TEST3
DOUT
TEST4
16M
4.2M
EFLG
FSX
EMPH
C2F
TOUT
MR1
TESE
TESD
MUTESL
LVdd
For the one-bit
D/A converter
LCHO
L/RVss
RCHO
RVdd
MUTER
XVDD
XOUT
XIN
XVSS
RWC
COIN
38
39
40
41
42
43
44
45
46
47
49
51
52
53
54
55
56
57
58
59
60
61
62
63
48
50