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| KX-T2388
Mi LINE OUTPUT CIRCUIT
Circuit
Operation:
Each signals are sent to the telephone line as follows.
+ (Beep Tone) pin 8 of IC1
> C34 > R37 — base of Q3 > collector of Q3 > Q101 - D5~8 > Telephone Line.
* (Tape Playback signal) Head
— C39 -> pin 2 of IC2 - pin 16 of IC2 > C46 > R78 > pin 15 of IC2 > pin 14 of IC2 — R55
— C33 — base of Q3 > collector of Q3 > Q101 — D5~8 — Telephone Line.
Circuit Diagram
C34
Beep Signal >~-—_-__+
Playback
oe
RSS
C33
ME POWER SUPPLY CIRCUIT
Function:
Power from the AC adapter Passes through the 2-stage regulating block consisting of Q5, and proviedes system
voltages of 6 v and 5.4 V.
Circuit Operation:
Power from the AC Adapter is supplied directly to the plunger trigger (A). Q5 is the seconde stage regulated power
supply. The voltage at point B is regulated to 6 V by the 6.8 V zener voitage of Dii. The 6 V voltage is shifted by Di2 to
5.4 V which is used to power the CPU, etc.
Circuit Diagram
CPU
Plunger
Luch
Plunger
Trigger
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