Text preview for : 16_00_01.pdf part of PANASONIC KX-TCD290 SERVICE MANUAL
Back to : KX-TCD290FXT.part1.rar | Home
SPEAKER RECEIVER MIC HEADSET JACK
1 2 3 4 5
30 32 66 67 80 72
Speech Decoding Speech Encoding Burst Decoding Burst Encoding
23 22 19 25 26 24
RXDA TXDA RSSI SYDA SYEN SYCL RF 21 31 Module 2 CN6
ANT1 ANT2
D/A A/D
Analog Front End
ADPCM Codec Filter DSP
RF Interface BMC
CHARGE(+) CHARGE CONTACTS CHARGE(-)
CHARGE CIRCUIT
Q4,Q5,Q9 R7
CHARGE
62
15
XTAL X1 10.368 MHz BATTERY ON SWITCH
CHARGE DETECT 52 EEPROM SCL 45 SDA 44 VBAT1 58 17
D7 J1 BATTERY TERMINAL J2 SWITCHED SUPPLY Q1 4.0V
IC3
61
DC/DC-SWITCH 56 2.5V 2.5V Q3 59 1.8V 60 1.8V Q2 RS 11 77 6 9 10 7 75 46 BBIC
IC1
CPU
1,12,40,76
ROWS
KEYPAD 27,28,34,35,36,74 COLUMNS
LCD
RESET CS SI SCL
LCD-BACK LIGHT KEY-BACK LIGHT ANTENNA LIGHT
KX-TCA128 BLOCK DIAGRAM (HANDSET)