Panasonic KX-TS2361CAW Service Manual ▷ View online
9
KX-TS2361CAW
4.2.4.
Power Circuit and Redial Back-up Circuit
4.2.4.1.
Function
This set is powered from the line. When it is an OFF-HOOK status, Tel Line
D1 Q1 R14 pin 17 of IC1 (to become the
power supply for IC1 speech network).
The voltage from the line is turned into a constant voltage by D6 and then supplied to the IC1 and sending and receiving circuit
of the set.
At ON-HOOK status the voltage from the line via R40, R5 is turned into a constant voltage by D8, and then become power sup-
ply for IC1 (Pin17), and the redial Back-up will be done.
The voltage from the line is turned into a constant voltage by D6 and then supplied to the IC1 and sending and receiving circuit
of the set.
At ON-HOOK status the voltage from the line via R40, R5 is turned into a constant voltage by D8, and then become power sup-
ply for IC1 (Pin17), and the redial Back-up will be done.
4.2.5.
Sending Circuit (Tx)
When a person talk through the Handset, the voice analog signal flow from the
mic
mic
C20 VR2 R33 C21 Q9 R38 C23 Q3 J10 R111 Q1 D1 Tel line.
Q9 and Q3 is an amplifier for the voice signal.
4.2.6.
Receiving Circuit (Rx)
Receiving signal from the line go through
D1
D1
Q1 R111 J10 C10 C12 R15 Q4 C15 R19 C16 Q6 C17 R26 Q7 C18 VR1
Handset speaker.
Q4 and Q6 is amplifier for the Receiving signal.
10
KX-TS2361CAW
5 Location of Controls and Components
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
6 Installation Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
7 Operating Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
11
KX-TS2361CAW
8 Troubleshooting Guide
8.1.
Service Hints
8.2.
Pulse Dialing Problems
SYMPTOM
CURE
No Tone Dialing.
Check IC1, Q3, Q9, VR3, R38, R34 and R35.
Dead.
Check IC1, Q2 and Q1.
Rings, no dial tone, no pulse or tone.
Check Q1, Q2, and D1.
No rings.
Check C1, R1, R3 and IC2.
No pulse dial.
Check Q1 and Q2.
Can a pulse sound be
monitored?
monitored?
Does the voltage across
Tip (T) and Ring (R)
rapidly switch between
48 V and 10V?
Tip (T) and Ring (R)
rapidly switch between
48 V and 10V?
Check Q1, Q2, D1,
and SA1.
and SA1.
Do pulses (0.6 Vp-p)
appear at the base of
Q2?
appear at the base of
Q2?
Does Pin 10 of IC1
output the dial pulse?
output the dial pulse?
Check D1, SA1, Q1
and Q2 and POS1.
and Q2 and POS1.
Check Q2 and C6
of Pin 10 of IC1.
of Pin 10 of IC1.
Check IC1.
OK
NO
NO
YES
YES
YES
YES
NO
NO
12
KX-TS2361CAW
8.3.
Problems With the Handset
8.4.
Tone Dialing Problems
NO
NO
YES
YES
NO
NO
NO
YES
YES
YES
NO
Connect to the
Telephone line and
lift the Handset.
Telephone line and
lift the Handset.
Can a dial tone be
heard from the
handset?
heard from the
handset?
Can signals be
transmitted from
the handset?
transmitted from
the handset?
Is there a dial tone at
Q4 and Q6 collector?
Q4 and Q6 collector?
Is there a dial
tone at Q7 Emitter?
tone at Q7 Emitter?
Check the handset,
handset cord,
C8 and R9.
handset cord,
C8 and R9.
Does a signal
appear at C20?
appear at C20?
Does a signal
appear at Q9 base?
appear at Q9 base?
Check Handset MIC
and Handset Cord.
and Handset Cord.
Does signal appear
at Q3 Emitter?
at Q3 Emitter?
Check VR2, R32,
C21, R34, R35.
C21, R34, R35.
NO Check C23, R38,
Q3.
Check R26, C17,
C16, R19, C15.
C16, R19, C15.
Check Q1, D1
Q2, SA1, POS1
and C22.
Q2, SA1, POS1
and C22.
OK
YES
OK
YES
Check D1,SA1
and POS1.
and POS1.
Check IC1.
Check C24, VR3, Q9.
YES
YES
YES
YES
NO
NO
NO
NO
Check "DIALING MODE"
SW is TONE.
Can the DTMF sound
be monitored?
SW is TONE.
Can the DTMF sound
be monitored?
Does a DTMF signal
appear at Q9 collecton?
appear at Q9 collecton?
Does a DTMF signal
appear at emitter of
Q1?
appear at emitter of
Q1?
Is DTMF signal at
Pin 11 of IC1?
Pin 11 of IC1?
Check Q1 and Q2.
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