Audiovox DM8900-00, Service Manual, Page: 13 / 19

14
IC501 BU34581-5G
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INSTRUCTION
DECODER
ROM
16384x8
BIT
DPH
DPL
E
H
L
ALU
FLAG
FLAG
STK
Acc
X
Y
CLOCK
GEN
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IO
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PC STACK 8 PC INC
RAM
512x4 BIT
RESET
RESET
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STP
CPUO2A
TEST
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CONTROL
IRQ
L-BUS
U-BUS
OSC1
OSC2
SYSTEM
CLK
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IR
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IR
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IC101 BA6387K
HOLD BLOCK
SCRATCH
CONTROL
FOCUS
SWITCH
GAIN 6dB
DET BLOCK
PS PL BL BS
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
RAMP
OSC
1
17 18
18
19 20 21 22 23 24
25
26
27
28
29
30
31
32
9
10
11
12
13
14
15
16
2
3
4 5 6 7 8
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k
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k
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0.6V
FOK
+
LOOP ON
FOCUS BIAS
+
+
18
1
M
1
0
0
k
2.64k
13.3k
B L 20k
P L 20k
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50k
TEO
402k
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10k
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250k
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50k
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1
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k
3
0
p
3
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p
1
6
0
k
1
6
0
k
1
0
k
2k
2k
2k
2k
60k
60k
10k
10k
44.7k
44.7k
20k
2
0
k
MUTE
high-off
3
9
k
3
9
k
µ