P-250 OVERALL CIRCUIT DIAGRAM 1/4 (DM)
P-250
P-250
P-250
A
Q
P
O
N
M
L
K
J
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
I
H
G
F
E
D
C
B
12
11
10
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
CPU
BUFFER
BUFFER
SDRAM 64M
SDRAM 64M
SDRAM 64M
FLASH ROM
64M
MASK ROM
64M
FLASH ROM
16M
RESET
REG5V
REG3.3V
REG1.5V
REG2.0V
(+VCC-ADJ)
DAC
I/V AMP
I/V AMP
SWP50
SWP50
SWP50
OR
INVERTER
OP AMP
not installed
FLASH ROM
64M
28CC1-8823074
8
USB
CONTROLLER
See parts list for details of circuit board component parts.
Note: