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64
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KX-F680BX/KX-F2681BX
CH1 5V/div
CH2 5V/div
CH3 5V/div
CH4 5V/div
W1 5
µ
s/div
Length 1k
W2 5
µ
s/div
Length 1k
Sampling
Normal
20Msps
Marker 1
T 352.95
µ
s
V 0.2 V
Marker 2
T 7.50
µ
s
V 5.0 V
T -345.45
µ
s
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
327.95
µ
s
377.95
µ
s
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 5
µ
s/div
Length 1k
W2 5
µ
s/div
Length 1k
Sampling
Normal
20Msps
Marker 1
T 352.95
µ
s
V 0.2 V
Marker 2
T 7.50
µ
s
V 5.0 V
T -345.45
µ
s
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
1347.40
µ
s
1397.40
µ
s
Time/div
10.0V
H1 W1
A0
D0
ROMCS
MDMCS
Too many
NG
Summary of Contents for KX-F680BX
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Page 130: ... 165 KX F680BX KX F2681BX EC1 EC2 EC3 EC4 EC5 EC6 EC7 EC9 EC10 EC11 EC12 EC13 EC8 TOOLS ...
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