40
IC801 MPU
WRGATE2
RFPDSH
Optical
Pick-up
LD
Driver
Write
Strategy
FsDAC
WDAC
IAPC
LPF
&
Gain
DSP
WFPDSH
FMON
LSRON
RWAPC
buffe
r
2.5VRE
F
GCA
S/H
B/H
+
-
36
S/H
MU
X
AM
P
APCDAC
(REDA/WRDA)
SCLK , SDATA , LDBUSY , WDEN
16
32
13
31
14
37
32
33
84
89
88
PG101
IC101 (HD153721TF)
IC701 (HD62604FDV)
BCNT
9
10
TCPH
36
27
32
85
R838
SIGN924
R834
49,46,44,45
99,95,97,96
SIGN926
DESCRIPTION OF CIRCUIT
1. ALPC (Automatic Laser Power Control) Circuit
1-1. Block Diagram