Read Panasonic KX-NCP1190XJ (serv.man3) Service Manual online
7
KX-NCP1190XJ
4.2.
Circuit Operation
4.2.1.
Function
• OPB3 CARD is an optional base card.
• MSG4/DPH4/EIO4/ECHO16/ESVM2/ESVM4 card can be mounted.
• 3 optional cards mountable (max).
• Software downloadable from the PBX main unit.
• MSG4/DPH4/EIO4/ECHO16/ESVM2/ESVM4 card can be mounted.
• 3 optional cards mountable (max).
• Software downloadable from the PBX main unit.
4.2.2.
Explanation of the Circuit Operation
OPB3 CARD consists of the following
• CPU Circuit
• Timing Signal Generator Circuit
• Timing Signal Generator Circuit
4.2.3.
CPU Circuit
Composition:
SH1 8bit CPU (IC2)
ROM 512kB (IC500)
RAM 1kB (internal)
128kB (external) (IC501, IC504, IC507)
ROM 512kB (IC500)
RAM 1kB (internal)
128kB (external) (IC501, IC504, IC507)
4.2.4.
Timing Signal Generation Circuit
Composition:
IC1, IC13, IC14, IC15
Circuit Operation:
This is a circuit which generates the timing signals for using for DPH4, MSG4, ESVM2, ESVM4.
These signals are generated from the signals (SHW_FH, SHW_CLK) which are presented from IC1.
These signals are generated from the signals (SHW_FH, SHW_CLK) which are presented from IC1.
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