12.6. Receiving Circuit (Rx)
Receiving signal from the line go through
D1 Q1 R15 Q4 R19 C16 Q6 C17 R26 Q7 C18 R29 Handset
speaker.
* Q4 and Q6 is amplifier for the Receiving signal.
13. TROUBLE SHOOTING GUIDE
13.1. Service Hints
SYMPTOM CURE
No Tone Dialing. Check IC1, Q3, Q9, R37, R38, R34 and R35.
Dead. Check IC1, Q2 and Q1.
Rings, no dial tone, no pulse or tone dial. Check Q1, Q2, D1.
No rings. Check C1, R1, R3 and IC2.
No pulse dial. Check Q1 and Q2.
13.2. Pulse Dialing Problems
13
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