Panasonic KX-TDA0174XJ / KX-TDA0174X (serv.man3) Service Manual / Supplement ▷ View online
13
KX-TDA0174XJ / KX-TDA0174X
14
KX-TDA0174XJ / KX-TDA0174X
1.5. POWER SUPPLY VOLTAGE GENERATOR
Change from the Original Service Manual Section 8.15.
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 generatedonboard as written below.
+160V, -100V and AC 75Vrms are required onboard, voltage levels are generatedonboard 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 byQ16 to shut down the input power supply as the overvoltage
protection.
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 byQ16 to shut down the input power supply as the overvoltage
protection.
15
KX-TDA0174XJ / KX-TDA0174X
1.6. FOR SCHEMATIC DIAGRAM
Change from the Original Service Manual Section 15
1
2
3
4
5
7
8
6
16
KX-TDA0174XJ / KX-TDA0174X
Click on the first or last page to see other KX-TDA0174XJ / KX-TDA0174X (serv.man3) service manuals if exist.