— 3 —
BLOCK DIAGRAM
CPU
MSM 6755B-17
LSI1
Keyboard
Buttons
LCD
LCD Driver
KS0066U-10B
LSI3
Reset IC
IC1
Power
Switch
Oscillator
X1, Q1
Power Supply Circuit
Q101 ~ Q104, D205
Power Amp.
LA4598
IC101
Filter (L)
Q106
Filter (R)
Q107
Phones/Output
Speaker (L)
Speaker (R)
VC
VCC
DVDD
AVDD
APO
MD0 ~ MD7
MA0 ~ MA18
DC + 9 V IN
DB4 ~ DB7
COM1 ~ COM14
SEG1 ~ SEG40
RS
R/W
E
KO8 ~
KO12
KI0 ~ KI6
KI0 ~ KI7
KO0 ~ KO7
ROM(2M-bit)
LC372100PM-
H78
LSI2
Summary of Contents for CTK-485
Page 12: ...11 PRINTED CIRCUIT BOARDS Main PCB JCM450 MA1M Top View Bottom View 1 2 7 5 3 4...
Page 13: ...12 Keyboard PCB KDM6111K KY1M Keyboard PCB KDM6111K KY2M Main PCB JCM450 MA2M 6 8 9 10...
Page 14: ...13 SCHEMATIC DIAGRAMS Main PCB JCM450 MA1M 1 2 7 5 3 4...
Page 15: ...14 Main PCB JCM450 MA2M 8 6 9 10 2 9 V 5 3 V 0 7 V...
