Daewoo DSD-9255E, Service Manual

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23
CIRCUIT OPERATION MANUAL
Chart 81. SCART PINSPEC.
1) PCM Audio
Audio related output of the Sti5518 is made in the form of PCM format and AC3 Interface format.
DSD-9255M uses the serial data of PCM format. PCM Data output format is in Standard format and I2S Compatible
PCM format.
Followings are the interface signals of PCM format.
PCMDATA (Sti5518 Pin52) : PCM Serial Data Output
SCLK (Sti5518 Pin51) : PCM Clock Output
LRCLK (Sti5518 Pin56) : Left/Right Channel select
PCMCLK (Sti5518 Pin55) : PCM Clock Input(18.432Mhz)
Data of PCM format is modified to Analogue signals at the external Audio DAC. The output information is sent to
external output port through Output magnifying equipment and AV Switch.
DSD-9255M can use two Audio DAC systems. (PCM1754/Texas Instruments)
Following diagram shows Timing Diagram with Audio DAC and TI PCM1754 Block.
(2) Audio
Pin Name Description Singnal Level Impedance
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
AOR
AIR
AOL
AGND
B GND
AIL
B
SWITCH
G GND
CLKOUT
G
DATA
R GND
DATAGND
R
BLNK
VGND
BLNKGND
VOUT
VIN
SHIELD
Audio Out Right
Audio In Right
Audio Out Left + Mono
Audio Ground
RGB Blue Ground
TV/AV(4:3, 16:9) Mode Select
RGB Green Ground
Data 2 : Clock pulse Out
(Unavailable)
RGB Blue In
TV/AV(4:3, 16:9) Mode select
RGB Green in
Data 1: Data Out(Unavailable)
RGB Red Ground
Data Ground
RGB Red In/Chrominance
Blanking Singnal
Composite Video Ground
Blanking Signal Ground
Composite Video Out
Composite Video In/Luminance
Ground/Shield(Chassis)
0.5 Vrms
0.5 Vrms
0.5 Vrms
0.5 Vrms
0.7 V
0.7V
0.7V
(Chrom.:0.3V burst)
1-3V=RGB, 0-0.4V=Composite
1V
1V
<1k ohm
>10k ohm
<1k ohm
>10k ohm
75 ohm
75 ohm
75 ohm
75 ohm
75 ohm
75 ohm