Panasonic KX-F680BX - Page 59

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KX-F680BX/KX-F2681BX
CH1 5V/div
CH2 5V/div
CH3 5V/div
CH4 5V/div
W1 5µs/div
Length 1k
W2 5µs/div
Length 1k
Sampling
Normal
20Msps
Marker 1
T 352.95µs
V 0.2 V
Marker 2
T 7.50µs
V 5.0 V
T -345.45µs
1/ T
2.895k Hz
V 4.8 V
W1 5µs
W2 5µs
Position
W1 327.95ms
W2 25.10ms
Time
Time Base Roll
Off
Time Base
External
Internal
Internal
-40.0V
327.95µs 377.95µs
Time/div
10.0V
H1 W1
A0
D0
ROMCS
MDMCS
NG
Too many MDMCS
Trigger CH1/2 MEM1 MEM2
The graphs below show you the wave form that is observed when MODEM doesn't work. (Oscillation is not intentionally
supplied to MDM.)
Please compare OK form to NG form.
MDMCS (pin 52 of IC5) signal is coming many times more than good wave form.
In the case of this wave form MODEM doesn't work. If soldering, conductance is no problem, we need to replace MODEM
(IC5).
CH1 5V/div
CH2 5V/div
CH3 5V/div
CH4 5V/div
W1 5µs/div
Length 1k
W2 5µs/div
Length 1k
Sampling
Normal
20Msps
Marker 1
T 352.95µs
V 0.2 V
Marker 2
T 7.50µs
V 5.0 V
T -345.45µs
1/ T
2.895kHz
V 4.8 V
W1 5µs
W2 5µs
Position
W1 1347.40µs
W2 25.10µs
Time
Time Base Roll
Off
Time Base
External
Internal
Internal
-40.0V
1347.40µs 1397.40µs
Time/div
10.0V
H1 W1
A0
D0
ROMCS
MDMCS
Too many
NG