Description Of Major Ics 1-15~33 - JVC KD-S785 Service Manual

Description of major ICs
TC9490FA (IC541) : DSP & DAC
1.Pin layout & Block daiagram
48 47
DV 49
SS3
50
RO
51
DV
DD3
LPF
52
DVR
53
LO
54
DV
SS3
55
ZDET
V 56
SS5
BUS0 57
58
BUS1
59
BUS2
60
BUS3
61
BUCK
Micro-
62
/CCE
controller
interface
63
/RST
64
V
DD5
1 2
46 45 44 43 42
Clock
generator
1-bit
DAC
Address
circuit
16k
RAM
Audio output
Digital output
circuit
3 4 5 6 7
41 40 39 38 37
PWM
Servo control
ROM
Digital equalizer
automatic
adjustment circuit
RAM
CLV servo
Sync signal
protection
EFM
Sub code
detector
8 9 10 11 12
36 35 34 33
32 TEZI
31
TEI
D/A
30
SBAD
29
FEI
A/D
28
RFRP
27
RFZI
26
RFCT
25 AV
24 RFI
Data
slicer
23
SLCO
22
AV
VCO
21
VCOF
20
RV
19
LPFO
PLL
TMAX
18
LPFN
17
TMAX
13 14 15 16
KD-S785
DD3
SS3
REF
1-15