Read Panasonic KX-TG2560B / KX-TG2560S Service Manual online
KX-TG2560B/KX-TG2560S
55
RINGER (Q202)
CPU (IC901)
RF CIRCUIT (900M Amp)
RF CIRCUIT (TX CIRCUIT)
IC690 (RF UNIT Rx Block)
(SS ASIC (IC620))
RF CIRCUIT (RX CIRCUIT)
VCC - REF (Pin
50
)
VCC - MAIN (Pin
51
)
IC201
VCC - TXREG (Pin
30
)
VCC - RXREG (Pin
31
)
VCC - SPAMP (Pin
1
)
C223
IC201
DATA Amp 2
CPU (IC901 16PIN)
DATA Amp 1
C217
R213
from RF CIRCUIT
AFOUTPUT
AFOUTPUT
R218
C212
46
47
48
49
NEW CIRCUIT OPERATION (Handset)
1. Power Supply Circuit
The voltage is supplied separately to each block.
Circuit Diagram
Circuit Diagram
2. Data Reception Circuit
The wave detection signal from the RF UNIT has high frequency elements eliminated by a CR filter consisting of R213 and C212.
Then it is amplified by DATA Amp1 and, once again, high frequency elements are eliminated by R218. After this, the signal is
amplified by DATA Amp2 and input to pin 16 of the CPU.
The data output waveform is a block pulse.
Then it is amplified by DATA Amp1 and, once again, high frequency elements are eliminated by R218. After this, the signal is
amplified by DATA Amp2 and input to pin 16 of the CPU.
The data output waveform is a block pulse.
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