Read Panasonic KX-TDA620BX Service Manual online
7 OUTLINE
7.1. GENERAL DESCRIPTION
The TDA620 is a port expansion unit for the TDA600.
Control of the telephone operates as a PBX, control of the call path, and control of the power supply of the option card
contained in the shelf are done by the BUS-S card.
BUS-S, the option card, and power supply are connected each other through the backboard, and are connected to BUS-M
contained in the TDA600 with a bus cable.
The LPR card has a sub-processor, communicates with the CPU of BUS-S through DPRAM of the on board ASIC and controls
various terminals.
Control of the telephone operates as a PBX, control of the call path, and control of the power supply of the option card
contained in the shelf are done by the BUS-S card.
BUS-S, the option card, and power supply are connected each other through the backboard, and are connected to BUS-M
contained in the TDA600 with a bus cable.
The LPR card has a sub-processor, communicates with the CPU of BUS-S through DPRAM of the on board ASIC and controls
various terminals.
7.1.1. BUS-S Card
This card is a control card for the expansion shelf. It controls the option card contained in the expansion shelf according to the
instructions of EMPR.
On the BUS-S card are LEDs in two colors that indicate the status of the card and the bus cable connector for connecting to
the BUS-M card.
Card component outline:
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instructions of EMPR.
On the BUS-S card are LEDs in two colors that indicate the status of the card and the bus cable connector for connecting to
the BUS-M card.
Card component outline:
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• 32bit CPU
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• SDRAMs, SRAM
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• FLASH memory
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• System TSW, Communication IC
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• Lithium Battery for back-up of static RAM.
7.1.2. Back Board
BB is the motherboard of the expansion shelf.
This board connects the power supply to BUS-S and the option card.
This board connects the power supply to BUS-S and the option card.
7.1.3. Power Supply Unit
This unit is switching regulator power supply and supplies DC voltages to BUS-S card, and optional service card (free slot). PSU
(power supply unit) has four outputs (40V, 30V, 15VPT, 15V). 15V output is supplied only in BUS-S card and option card. Other
outputs are mainly used as an object for the electric supply to a terminal. Refer to each S/M for the details of PSU.
(power supply unit) has four outputs (40V, 30V, 15VPT, 15V). 15V output is supplied only in BUS-S card and option card. Other
outputs are mainly used as an object for the electric supply to a terminal. Refer to each S/M for the details of PSU.
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KX-TDA620BX
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