TP–nKP
Principle of each function
1. Receiving and Call sound
Receiving a call
While pressing a button voltage drop from DC 10~12V to less than
5V at “L” Terminal
▶
12V to Q6 “Collector” Terminal
▶
IGenerating
“Tremolo”sound through Q1,Q2,Q3
Generating 12V at Q4 “Collector” termina
▶
Power supplying to 386
IC No.6 pin
“Tremolo” sound generated from Q1,Q2,Q3
▶
HOOK S/W
▶
IC1 3rd pin input
▶
5th pin output
▶
V/R
▶
Speaker
AMP IC Power
Making a signal
Make a sound through a speaker
2. Making a call
Speak with handset
C-MIC
▶
HOOK S/W
▶
IC1 3rd pin
▶
IC1 5th pin
▶
HOOK S/W
▶
T1 Trans
▶
Output through “L1”
Deliver a voice message
3. Receiving a call
Pick up the phone
“L1” terminal
▶
T1 Trans
▶
HOOK S/W
▶
Speaker
Listening
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