Read Panasonic KX-TG2560B / KX-TG2560S Service Manual online
KX-TG2560B/KX-TG2560S
56
RX VOL
+7dB
0dB
–7dB
EV1
H
L
L
EV2
L
H
L
22 pin
21 pin
R204
R201
Q201
Q202
RINGER
24
23
ALARM_VOL
ALARM
IC901
3. Ringer Circuit
If the ringer volume is set to low and the key is entered an alarm tone is output from pin 23 of the CPU and input to Q202. If the
ringer volume is set to high, Q201 turns on and results in a louder beep tone.
ringer volume is set to high, Q201 turns on and results in a louder beep tone.
4. Reception Signal Circuit
The receiver circuit comprises expander IC201.
After being adjusted to the appropriate level by VR202, the signal passes through a 3 kHz LPF and an expander built into IC201.
When the user talks more softly, the received audio signal is audible at the standard level.
After being adjusted to the appropriate level by VR202, the signal passes through a 3 kHz LPF and an expander built into IC201.
When the user talks more softly, the received audio signal is audible at the standard level.
Circuit Diagram
SP MUTE H : SPEAKER OFF
L : SPEAKER ON
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