Panasonic KX-NCP1173XJ (serv.man2) Service Manual ▷ View online
11
KX-NCP1173XJ
5.2.3.
Power Supply Circuit
5.2.3.1.
Power Supply Voltage Generator
The input from the main power supply is in 3 voltage levels: +15V,+15VPT,+40V.
Since the voltage levels: +15V,+5V,+3.3V,+40V,+160V,-100V and AC75Vrms are required onboard, voltage levels are generated
onboard as written below.
Since the voltage levels: +15V,+5V,+3.3V,+40V,+160V,-100V and AC75Vrms are required onboard, voltage levels are generated
onboard as written below.
5.2.3.2.
DC/DC Circuit (+3.3V, +5V)
The protection circuit consists of an output short protection and an overvoltage protection.
When an output of power supply is short, IC800 or IC801 works to stop the output as the output short protection.
When +5V and/or +3V output become overvoltage caused by Q802 and/or Q803 short, it is detected by D806 and D807.
Q800 is cut by Q801 to shut down the input power supply as overvoltage protection.
When an output of power supply is short, IC800 or IC801 works to stop the output as the output short protection.
When +5V and/or +3V output become overvoltage caused by Q802 and/or Q803 short, it is detected by D806 and D807.
Q800 is cut by Q801 to shut down the input power supply as overvoltage protection.
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KX-NCP1173XJ
5.2.3.3.
Ringer Generating Circuit
The bell signal forms a sine wave out of the rectangular wave of 20/25Hz transmitted from ASIC of MPR, amplifies it up to
AC75Vrms, and generates it.
+40V is stepped up to +180V and -100V by SW power circuit that oscillates at 200KHz, and the voltage between these is ampli-
fied with a focus on +30V to generate the bell signal of AC75Vrms.
AC75Vrms, and generates it.
+40V is stepped up to +180V and -100V by SW power circuit that oscillates at 200KHz, and the voltage between these is ampli-
fied with a focus on +30V to generate the bell signal of AC75Vrms.
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KX-NCP1173XJ
6 Location of Controls and Components
6.1.
Names and Locations
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KX-NCP1173XJ
7 Installation Instructions
7.1.
Information about the Physical Extension Cards
7.1.1.
SLC8 Card
Function
8-port extension card for SLTs with Caller ID (FSK).
Accessory and User-supplied ltems
Accessories (included): none
User-supplied (not included): RJ45 connector
User-supplied (not included): RJ45 connector
Pin Assignments
RJ45 Connector
LED Indications
No.
Signal Name
Function
1-3
Reserved
-
4
T
Tip
5
R
Ring
6-8
Reserved
-
Indication
Color
Description
CARD STATUS
Green/Red
Card status indication
• OFF: Power Off
• Green ON: Normal (all ports are idle)
• Green Flashing (60 times per minute): Normal (a port is in use)
• Red ON: Fault (includes reset)
• Red Flashing (60 times per minute): Out of Service
• Green ON: Normal (all ports are idle)
• Green Flashing (60 times per minute): Normal (a port is in use)
• Red ON: Fault (includes reset)
• Red Flashing (60 times per minute): Out of Service
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