Ic Block Diagrams; Ic1 Cxa1364R (Rf Amp Board); Ic3 Cx20115A (Drum Drive Board); Ic307 Cxd8493M (Audio Board) - Sony PCM-R500 Service Manual

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• IC Block Diagrams

ENV COMP
ENV PEAK
P ENV OUT
TE
L 13942296513

IC3 CX20115A (DRUM DRIVE board)

16 15 14 13 12 11
LIMITER
CAP FG
PREAMP
Vcc
DRUM FG
DRUM
COMPARATOR
REG
FG
PREAMP
BUFFER
1 2 3
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IC1 CXA1364R (RF AMP board)

48 47 46 45
1
LIM OUT
LIM GND 2
MOD1 IN 3
LOGIC
4
MOD2 IN
5
LIM VCC
6
ENV OUT
PB LIMIT
RF
7
ENVELOPE
8
DET
9
LIM IN
10 PCM EQ
EQ OUT
PILOT
ENVELOPE
11
DET
PILOT
12
P ENV IN
OCA
PILOT
FILTER
13 14 15 16 17
10 9
CAPSTAN
FGx2
CAP FG LOGIC
COMPRATOR
COMPARATOR
PG
PG
COMPARATOR
PREAMP
LEVEL +
–
SHIFT
4 5 6 7 8
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8
44 43 42 41 40 39 38 37
A
PB
REC OCA
AMP
A
REC
AMP
SWITCH
B
REC
AMP
B PB
AMP
REG
22
18 19 20 21 23 24
Q Q
3 6 7 1 3

IC307 CXD8493M (AUDIO board)

1
AGND
APD 2
AINL +
3
+ +
– –
AINL -
4
ACAL 5
LGND 6
VL +
7
PDML 8
9
NC
10
NC
11
NC
12
NC
13
NC
NC 14
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2 9 9 4 2 8
36 ALPC
35 A PC
34
A HA IN
33 A RA OUT
32 REC VCC
31
HA VCC
30 REC BIAS
29
REC GND
28 HA GND
27 B RA OUT
26
B HA IN
25
B PC
1 5 0 5 8 2 9 9 4
28
VOLTAGE
REFERENCE
27
+ 26
+
+
+
–
–
25
– –
24
23
22
21
20
19
18
17
16
15
m
co
9 9
2 8 9 9
VREF +
VREF -
AINR +
AINR -
VA -
VA +
I CKL
PDMR
NC
NC
NC
NC
NC
NC