KX-TG6461CAT, KX-TGA641RUT - Panasonic Telephone Service Manual (repair manual). Page 9

Read Panasonic KX-TG6461CAT / KX-TGA641RUT Service Manual online

9
KX-TG6461CAT/KX-TGA641RUT
4.2.2.
Power Supply Circuit
The power is supplied to the BBIC,TAM Companion,Power AMP,LCD module,EEPROM,Flash Memory,LED,LCD backlight from
AC Adaptor(+6.5V) as shown in Fig 1.
When power line failure, the power is supplied to BBIC,TAM companion,EEPROM from telephone line instead of AC Adaptor
through D138 and Q341.
• BBIC (IC501) 
• TAM Companion (IC201) 
AC adaptor 
→ F301 → D301→ IC301 → D353 → IC201 (VDDPA 3.2V)
• RF Power AMP (IC801) 
AC adaptor 
→ F301 → D301→ IC304 → Q608 → IC801 (VCC)
• EEPROM (IC561) 
• Flash memory (IC541)
AC adaptor 
→ F301 → D301→ IC301 → D311 → IC501 (BAT:CP_VOUT1) → IC541 (VDD 3.0V)
• LCD module
AC adaptor 
→ F301 → D301→ IC301 → D311 → IC501 (BAT:CP_VOUT1) → CN1 → LCD module (VDD 3.0V)
• LED
AC adaptor 
→ F301 → D301→ IC301 → D311 → IC501 (BAT:CP_VOUT1) → CN1 → LED (3.0V)
• LCD backlight
AC adaptor 
→ F301 → D301 → IC301→ CN2 → LCD backlight (3.5V)
<Fig.1>
Page of 96
Display

Click on the first or last page to see other KX-TG6461CAT / KX-TGA641RUT service manuals if exist.