Read Panasonic KX-TDA3168XJ / KX-TDA3168X (serv.man3) Service Manual Supplement online
1.6. CIRCUIT DESCRIPTION
Change from the Original Service Manual Section 7.1.
This EXT-CID card generates the extension Caller ID signals (FSK signal) with the PBX main CPU control.
The data flow is shown below.
1.7. POWER SUPPLY
Change from the Original Service Manual Section 7.2.
+3.3V and +5V powers are supplied to this EXT-ICD card via 60 pins connector (CN101) from the PBX main board.
+3.3V power generates +2.5V by the DC/DC converter, and supplies this card´s internal circuit power.
The power supply system is shown below.
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KX-TDA3168XJ / KX-TDA3168X
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