Ic Block Diagram - NAD C 541 Service Manual

IC BLOCK DIAGRAM

U101: LA9240
U301: LC78621ED
DEFI
1
EFMIN
11
FSEQ 22
CLV+
13
CLV–
14
V/P 15
PW,SBCK 59,61
57,60
SBSY,SFSY
WRQ,SQOUT 63,65
CQCK
67
COIN 66
RWC 64
DEMO 30
64 63 62
APC
FIN2 1
FIN1 2
I/V
E 3
BAL
F 4
TB 5
TE
TE– 6
TE 7
TESI 8
T.SERVO & T.LOGIC
SCI 9
TH 10
TA 11
TD– 12
TD 13
JP 14
TO 15
FD 16
Slice level VCO clock Oscillator
control Clock control
SYNCHRONIZATION
DETECTION
EFM DEMODULATION
CLV DIGITAL
SERVO
SUBCODE
SEPARATION
Q CRC
MICROPROCESSOR
INTERFACE
SERVO
COMMAND
61 60 59 58
REF
RF DET
VCA
µ - com
VCA
INTER FACE
F.SERVO & F.LOGIC SPINDLE SERVO
17 18 19 20 21 22 23 24
2K x 8-bit RAM
C1 AND C2 ERROR DETECTION
AND CORRECTION
FLAG PROCESSING
Crystal oscillator system
Timing generation
17
57 56 55 54 53 52 51 50 49
SLC
RF Amp
SLED SERVO
25 26 27 28 29 30 31
RAM address
generator
Interpolation
and muting
Digital
output
Antishock
interface
Level meter
Digital
Peak meter
attenuator
8x oversampling
digital filters
1bit DAC
48 NC
47 TBC
46 FSC
45 DGND
44 SLI
43 SLC
42 RFS–
41 RFSM
40 CV+
39 CV–
38 SLOF
37 HFL
36 TES
35 TOFF
34 TGL
33 JP+
32
42 LRSY
C2F
45
ROMXA
44
DOUT
56
ASDACK
38
ASDFIN
39
ASDFIR
40
ASLRCK
41
DACKO
36
DFOLO
35
DFORO
34
LRCKO
33