Panasonic KX-TDA0194XJ / KX-TDA0194X Service Manual ▷ View online
5
KX-TDA0194XJ/KX-TDA0194X
3 Technical Descriptions
3.1.
Block Diagram
Connector to OPB3
KX-TDA0194X/XJ ESVM4 BLOCK DIAGRAM
DSP
DSP
Memory
Memory
VOX
detection (0)
(1)
(0)
VOX
detection (4)
VOX
detection #2
VOX
detection #3
VOX
detection #4
VOX
detection (5)
VOX
detection (6)
VOX
detection (7)
VOX
detection (1)
VOX
detection (2)
VOX
detection (3)
CNG
detection (0)
CNG
detection (1)
P-I/O
CO-CO
connection
Card ID
SLOT1[0:7]
A
B
B
A
B
B
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KX-TDA0194XJ/KX-TDA0194X
3.2.
Circuit Operation
3.2.1.
ESVM4 Card
Composition:
DSP IC (IC1, IC4)
Flash ROM (IC2, IC5)
Circuit Operation:
This card has four voice message circuits. The voice message circuit is composed of DSP and Flash ROM.
DSP has the functions that PCM recording and playback, voice prompting, tone detection and generation.
DSP stores Flash ROM with voice data and voice prompt.
DSP IC (IC1, IC4)
Flash ROM (IC2, IC5)
Circuit Operation:
This card has four voice message circuits. The voice message circuit is composed of DSP and Flash ROM.
DSP has the functions that PCM recording and playback, voice prompting, tone detection and generation.
DSP stores Flash ROM with voice data and voice prompt.
3.2.2.
CHP[0]-CHP[7] TIMING CHART
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KX-TDA0194XJ/KX-TDA0194X
3.2.3.
Vox Detection (0:3)
The VOX detection section consists of the DSP (IC1, IC4), operational amplifier (IC30, IC31), comparator (IC32) and 4 VOX
detection circuits.
detection circuits.
3.2.4.
Vox Detection (4:7)
The VOX detection section consists of the PCM CODEC (IC10-13), operational amplifier (IC33, IC34), comparator (IC35) and 4
VOX detection circuits.
VOX detection circuits.
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KX-TDA0194XJ/KX-TDA0194X
4 Location of Controls and Components
4.1.
Names and Locations
Overview
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