Sharp DV-550U, Service Manual

Page: 28 / 84

DV-550U
12. IC FUNCTION LIST
12-1. IC301 IX1461GE
RF PRE AMP.
24 23 22 21 20 19 18 17 16 15 14 13
1 9 8 7 6 5 4 3 2 10 12 11
MIX
EIN
CIN
BIN AIN
S/Dsel
GND1
FIN
VrefIN
DIN
DOUT FOUT
VCC1
GAINsel1
GAINsel2
RFPOUT VCC2 AOUT BOUT COUT EOUT RFNOUT GND2 MIXOUT MIXIN
12-1-2. Block Diagram
Pin No. Terminal name I/O Operation function
1 EIN I RF signal input. Input of RF signal output of optical pickup.
2 GND1 – Ground
3 S/Dsel I Single layer/dual layer selection signal input.
4 AIN I RF signal input. Input of RF signal output of optical pickup.
5 BIN I RF signal input. Input of RF signal output of optical pickup.
6 CIN I RF signal input. Input of RF signal output of optical pickup.
7 DIN I RF signal input. Input of RF signal output of optical pickup.
8 VrefIN I Reference voltage input. (2.1V)
9 FIN I RF signal input. Input of RF signal output of optical pickup.
10 GAINsel1 I Amp gain selection input 1.
11 VCC1 – Power terminal. (5.0V)
12 GAINsel2 I Amp gain selection input 2.
13 FOUT O RF signal output. Input RF signal is current-voltage-converted and output.
14 EOUT O RF signal output. Input RF signal is current-voltage-converted and output.
15 DOUT O RF signal output. Input RF signal is current-voltage-converted and output.
16 COUT O RF signal output. Input RF signal is current-voltage-converted and output.
17 BOUT O RF signal output. Input RF signal is current-voltage-converted and output.
18 AOUT O RF signal output. Input RF signal is current-voltage-converted and output.
19 VCC2 – Power terminal. (5.0V)
20 RFPOUT O Data read signal output. The same phase as MIXIN.
21 RFNOUT O Data read signal output. Reverse phase with respect to MIXIN.
22 MIXIN I Data read signal input.
23 MIXOUT O Data read signal output.
24 GND2 – Ground
12-1-1. Mode selection table
GAINsel1 (Terminal 10) GAINsel2 (Terminal 12) Amp gain
L L +6dB
H, OPEN L -2dB
L H, OPEN +2dB
H, OPEN H, OPEN -6dB
Layer S/DSEL (Terminal 3) Amp gain
Single L, OPEN 0dB
Dual H +10dB
Single layer/dual layer selection
Amp. gain selection
12-1