Sharp XL-520W Service Manual page 40

XL-520W/CP-520
IC802 VHiTC9284BF-1:Servo/Signal Control (TC9284BF)
TESTX 65
HS
66
GNDD
67
SPDA
68
COFS
69
WDCK 70
CHCK
71
BCK
72
AOUT
73
EMPH
74
DOUT
75
TEST2
76
V 77
DDX
XI
78
XO 79
GNDX 80
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
PLL circuit
Data slicer
Internal TMAX detection circuit
CLV servo circuit
status
Sync separating circuit
EFM demodulation circuit
Correcting
output
circuit
audio
output
Correcting
circuit
Digital Out
DA
Clock
converter
generator
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Figure 40 BLOCK DIAGRAM OF IC
AD converter
Address
circuit
Servo status
generating
16K RAM
Sub-code
Q data
demodulation
RAM
circuit
– 40 –
Focus/
tracking
servo
Tracking
signal
search
control
circuit
circuit
Correcting
system
timing
generator
CD bus
interface
40 DMPC
DMFC
39
DMON
38
TEST
37
FMFB
36
35 TEST1
FMON
34
TKIC
33
TGUH1
32
TGUH2
31
TGUL
30
TEL1
29
28 TEL2
DFCT
27
26 GNDD
V
25
DDD