— 8 —
MAJOR WAVEFORMS
1
Clock pulse
MSM6755B-17 pin 32
1
2
+5 V source DVDD
JC connector pin 6
3
APO signal
JC connector pin 5
2
3
4
Sound waveform (R-ch) Tone:
Whistle
JC connector pin 4
Key:
A4
5
Sound waveform (L-ch) Volume:
JC connector pin 3
4
5
6
Button scan signal KO6
JA connector pin 14
7
Button scan signal KO7
JA connector pin 15
6
7
8
LCD common signal COM9
SED1278F0A pin 55
9
LCD common signal COM10
SED1278F0A pin 56
8
9
Содержание CTK-401
Страница 11: ...9 PRINTED CIRCUIT BOARDS Main PCB JCM442 MA1M Top View Bottom View 1 2 3 4 5 8 9 6 7...
Страница 12: ...11 SCHEMATIC DIAGRAMS Main PCB JCM442 MA1M 6 7 1 9 8 5 4 3 2...
Страница 13: ...12 Sub PCB JCM442 MA2M...
Страница 14: ...13 Keyboard PCBs KDM4910K KY1M KY2M...
Страница 16: ...15 EXPLODED VIEW 18 14 13 15 12 11 19 17 16 10 R 1 R 2 R 3 5 6 8 7 9 4 R 4 R 6 R 5 4 3 1 2...
Страница 19: ...MA0600571A...
