Samsung Electronics 8-5
Troubleshooting
8-1-5 Abnormal Keytone
Y
N
Y
N
Y
N
Y
N
Abnormal keytone.
CLK waveform outputted
from U100 pin 49?
CLK waveform applied
from U330 pin 2?
CLK waveform applied
to U330 pin 3?
Normal keytone?
Replace the Keypad assembly.
Check U330, C333, and C334.
Replace if required.
Resolder R341, C342, R340, C341,
C337, and C334
Check U100 pin 49. Replace if required.
END
Summary of Contents for SCH-1500 series
Page 2: ...Samsung Electronics Co Ltd ELECTRONICS ...
Page 4: ...1 2 Samsung Electronics General Introduction Memo ...
Page 22: ...4 8 Samsung Electronics NAM Programming Memo ...
Page 46: ...Memo 7 4 Samsung Electronics Test Procedure ...
Page 81: ...10 1 DBDM Phone 10 1 1 Main Board PCB REV 2 1 10 PCB Diagrams Top View Bottom View ...
Page 82: ...10 1 2 Memory Board PCB REV 2 0 ...
Page 83: ...10 2 Desk Top Rapid Charger Board PCB ...
Page 84: ...10 3 Travel Charger Board PCB ...
Page 85: ...10 4 Cigarette Lighter Adaptor Board PCB ...
Page 86: ...10 5 Hands Free Kit Board PCB ...
Page 87: ...10 6 Cradle PCB ...
Page 88: ...Memo ...
Page 116: ...12 1 Main Block Diagram ...
Page 117: ...12 2 Desk Top Rapid Charger Block Diagram ...
Page 118: ...12 3 Travel Charger Block Diagram ...
Page 119: ...12 4 Cigarette Lighter Adaptor Block Diagram ...
Page 120: ...12 5 Hands Free Kit Block Diagram ...
Page 121: ...12 6 Logic Circuit Diagram REV 2 1 ...
Page 122: ......
Page 123: ...12 7 Memory Board Circuit Diagram REV 2 0 ...
Page 124: ...12 8 RF Circuit Diagram REV 2 1 ...
Page 125: ...12 9 Desk Top Rapid Charger Circuit Diagram ...
Page 126: ...12 10 Travel Charger Circuit Diagram ...
Page 127: ...12 11 Cigarette Lighter Adaptor Circuit Diagram ...
Page 128: ...12 12 Hands Free Circuit Diagram 12 12 1 Power Supply ...
Page 129: ...12 12 2 Audio Amp ...
Page 130: ...12 12 3 Comm Cont ...
Page 131: ...12 13 Cradle Circuit Diagram ...
Page 132: ...Memo ...