Panasonic KX-NCP1174XJ (serv.man2) Service Manual ▷ View online
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KX-NCP1174XJ
5.2.13. Power Supply Voltage Generator
The input from the main power supply is in 3 voltage levels: +15V, +30V, +40V.
Since the voltage levels: +15V, +5V, +3.3V, +40V, +160V, -100V and AC 75Vrms are required onboard, voltage levels are generated
onboard as written below.
Since the voltage levels: +15V, +5V, +3.3V, +40V, +160V, -100V and AC 75Vrms are required onboard, voltage levels are generated
onboard as written below.
The protection circuit consists of an output short protection and an overvoltage protection.
When an output of power supply is short, IC7 or IC10 works to stop the output as the output short protection.
When +5V and/or +3V output become overvoltage caused by Q12 and/or Q13 short, it is detected by D20 and D21. Q15 is cut by
Q16 to shut down the input power supply as the overvoltage protection.
When an output of power supply is short, IC7 or IC10 works to stop the output as the output short protection.
When +5V and/or +3V output become overvoltage caused by Q12 and/or Q13 short, it is detected by D20 and D21. Q15 is cut by
Q16 to shut down the input power supply as the overvoltage protection.
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KX-NCP1174XJ
6 Location of Controls and Components
6.1.
Names and Locations
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KX-NCP1174XJ
7 Installation Instructions
7.1.
Information about the Physical Extension Cards
7.1.1.
SLC16 Card
Function
16-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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KX-NCP1174XJ
8 Troubleshooting Guide
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