Panasonic KX-TDA6382X / KX-TDA6382SX Service Manual ▷ View online
29
KX-TDA6382X/KX-TDA6382SX
In case of the Main Board is Defective (Continue)
NG
NO
OK
OK
Cannot detect a incoming call.
Check R5A-H, C3A-H.
Replace the
damaged parts.
Check the photo couplers.
The four pins of PC2A-H and
PC1A-H should repeat
L → H → L → H
while the bell is ringing.
Replace the photo
couplers and the
peripheral R or C.
Replace the relevant
CODEC IC6 and IC7.
CODEC IC6 and IC7.
END
30
KX-TDA6382X/KX-TDA6382SX
In case of the Main Board is Defective (Continue)
NO
NO
OK
OK
NG
OK
NG
OK
NG
OK
NG
OK
The line can not be acquired.
Is the CODEC(IC6,IC7) dial port
H
ĺ L while the line is acquiring ?
Replace the
NG parts of CODEC.
Replace the
NG parts of RL3A-H.
Replace the
NG parts of Q4A-H.
Replace the
NG parts of D3A-H.
Replace the
NG parts of L1A-H.
Replace the
NG parts of TH1A-H or J1A-H.
Are RL3A-H ON
while the line is acquiring ?
Check the transistors
Q4A-H.
Check D3A-H.
Check L1A-H.
Check TH1A-H or J1A-H.
END
31
KX-TDA6382X/KX-TDA6382SX
In case of the Main Board is Defective (Continue)
NO
Yes
NG
Cannot make an outgoing call.
(DTMF Dialing Mode)
Can DTMF signal be sent
between T-R?
Confirm DTMF waveform of
Vout pin(51, 53, 60, 62) of Codec.
Replace the faulty parts of
IC6, 7.
OK
NG
Confirm DTMF waveform
of OP_AMP IC1A-H pin1.
OK
Go to the flowchart
"The line cannot be acquired."
NG
The dial tone can be heard
from the station.
Confirm Dial tone waveform
of OP-AMP IC1A-H pin1.
OK
NG
Confirm Dial tone waveform of
Vin pin(49, 55, 58, 64) of Codec.
NO
END
Yes
OK
Replace the relevant Codec
IC6, 7.
NG
Replace the faulty parts of
IC1A-H.
Replace the faulty parts of
IC1A-H.
Check C11A-H (0.1 F).
Replace the faulty parts of
C11A-H.
32
KX-TDA6382X/KX-TDA6382SX
In case of the Main Card is Defective (Continue)
NG
all ports
CO1-4 ports
CO5-8 ports
CO5-8 ports
OK
OK
Caller ID is not detected.
END
Dose this occur in a specific port
or all ports or CO1-4 or CO5-8.
a specific port
Another Case.
Check soldering of terminal of IC308
and 409 and the peripheral parts.
Resolder IC308 and 409.
Check the test
land between [4M] and [DG].
4.096MHz?
NG
Check IC3 Pin123, L101,
RA18 Pin7 and 2.
NG
Replace the
defective parts.
Check the test
land between [+2.5] and
[DG] 2.5V?
OK
Replace the IC308 or 409.
Replace the IC308 or 409.
NG
Check IC803, L1 and C1, C8.
NG
Replace the
defective parts.
OK
OK
Check the voltage
of Pin61(PLL_VCNT) of
IC308, IC409:0.8-0.9V.
NG
Check
CO#1-4:R3140, C3148
CO#5-8:R4240, C4248.
CO#1-4:R3140, C3148
CO#5-8:R4240, C4248.
NG
Replace the
defective parts.
OK
Check the voltage of test land
[VREF1] of IC308
of [VREF2] of IC408
:1.5-1.8V.
OK
NG
Replace the defective parts.
OK
Replace the IC308 or 409.
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