Panasonic KX-NT553RU-B / KX-NT556RU-B Service Manual ▷ View online
29
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
Table-4
Note:
Refer to waveform (5) in Waveform (P.68) .
No. 5
DDR2 Error
[Check Points]
Measure the voltage at C578 (Between VDDIO_DDR and DGND). Is it 3.3V?
Measure the voltage at C521 (Between VDDIO_DDR and DGND). IS It 3.3V?
Measure the DDR_CLK0 signal at J8 of IC501 or R557. Is it 375MHz?
Measure the voltage at C521 (Between VDDIO_DDR and DGND). IS It 3.3V?
Measure the DDR_CLK0 signal at J8 of IC501 or R557. Is it 375MHz?
[Related Parts]
IC501, L508, C503-C508, C511, C512, C513, C537-C540, C560, C577, C578,
R522, R523, R557, R570-R573
L501, C509, C510, C514-C517, C518-C521, C561, R501-R505
R522, R523, R557, R570-R573
L501, C509, C510, C514-C517, C518-C521, C561, R501-R505
[Related Circuit]
30
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
Table-5
No. 7
ASIC initialization Error
[Check Points]
Measure the voltage at C213 (Between 3.3V and DG). Is it 3.3V?
3.3V?Measure the ASIC_CLK signal at Pin 1 of IC205 (Ope PCB)
Flat Cable(Between Main PCB and Ope PCB)
For details to 9.3.1 ASIC Data Error. (P.32)
3.3V?Measure the ASIC_CLK signal at Pin 1 of IC205 (Ope PCB)
Flat Cable(Between Main PCB and Ope PCB)
For details to 9.3.1 ASIC Data Error. (P.32)
[Related Parts]
CN501, L503, L504, L506L509, C527, C526, R565, R567, R568, R586 (Main PCB)
CN205,L211, L213, C202-C204, C213, C241, D201 (Ope PCB),
Flat Cable(Between Main PCB and Ope PCB)
CN205,L211, L213, C202-C204, C213, C241, D201 (Ope PCB),
Flat Cable(Between Main PCB and Ope PCB)
[Related Circuit]
(*1) : except NT551
31
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
Table-6
No. 11
L2SW initialization Error
[Check Points]
Measure the voltage at C349 (Between L2_DVDD and DGND). Is it 3.3V?
Measure the voltage at C301 (Between L2_VDD10 and DGND). IS It 1.0V?
Measure the 25MOUT signal at Pin 117 of IC301 (Main PCB).
Measure the TXCLK signal at Pin 86 of IC301 (Main PCB).
Measure the RXCLK signal at Pin 83 of IC301 (Main PCB).
For details to 9.7.1 PHY Data Error. (P.36)
Measure the voltage at C301 (Between L2_VDD10 and DGND). IS It 1.0V?
Measure the 25MOUT signal at Pin 117 of IC301 (Main PCB).
Measure the TXCLK signal at Pin 86 of IC301 (Main PCB).
Measure the RXCLK signal at Pin 83 of IC301 (Main PCB).
For details to 9.7.1 PHY Data Error. (P.36)
[Related Parts]
IC301, IC502, X501, R304, R306, R308-R310, R342, R343, R506-R509, R513,
R515, R541, R726, C301, C303, C305, C310, C345, C349-C354, C528, C529,
L301, L304, L305, L307
R515, R541, R726, C301, C303, C305, C310, C345, C349-C354, C528, C529,
L301, L304, L305, L307
[Related Circuit]
32
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
9.2.
Main LCD Does Not Operate
Note:
Refer to waveform (5) in Waveform (P.68)
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