Read Sharp CD-CH1500 (serv.man8) Service Manual online
CD-CH1500H/CD-CH1500W
– 52 –
IC6 VHiTA2147F/-1: Servo Pre Amp. (TA2147F)
1
VCC
Input
3.3 V power supply terminal.
2
FNI
Input
Main beam amp input terminal.
3
FPI
Input
Main beam amp input terminal
4
TPI
Input
Sub-beam amp input terminal.
5
TNI
Input
Sub-beam amp input terminal.
6
MDI
Input
Monitor photodiode amplifier input terminal.
7
LDO
Output
Laser diode amp output terminal.
8
SEL
Input
APC circuit ON/OFF signal, LDO terminal control input terminal and bottom/peak
detection frequency switching terminal.
detection frequency switching terminal.
9
TEB
Input
Tracking error balance adjustment signal input terminal.
• TEBC input voltage.
• TEBC input voltage.
10
TEN
Input
Tracking error signal generation amp antiphase input terminal.
11
TEO
Output
Tracking error signal generation amp output terminal.
12
SBAD
Output
RF signal peak detection output terminal.
13
GVSW
Input
AGC, FE, TE amp gain switching terminal.
14
VRO
Output
Reference voltage (VRO) output terminal. • VCC= 3.3 V: VRO= 1/2 VCC
15
FEO
Output
Focus error signal generation amp output terminal.
16
FEN
Input
Focus error signal generation amp antiphase input terminal.
17
RFRP
Output
Signal generation amp output terminal for track count.
18
RFIS
Input
Signal generation amp input terminal for track count.
19
RFGO
Output
RF signal amplitude adjustment amp output terminal.
20
RFGC
Input
RF amplitude adjustment control signal input terminal. • RFGC input voltage.
21
AGCI
Input
RF signal amplitude adjustment amp input terminal.
22
RFO
Output
RF signal generation amp output terminal.
23
RFN
Input
RF signal generation amp input terminal.
24
GND
—
GND terminal.
Terminal Name
Pin No.
Input/Output
Function
GND
OFF
Connection to VCC via 1 k
Ω
Hi-z
ON
Control signal output
VCC
ON
Control signal output
SEL
APC circuit
LDO
GND
CD-RW
Hi-z
CD-DA
VCC
CD-CA
GVSW
Mode
Figure 52 BLOCK DIAGRAM OF IC
PIN
SEL
(APC_SW)
TEB
(TE_BAL)
RFGC
(AGC_Gain)
GVSW
(CD/RW)
V
CTRL
V
CC
HiZ
GND
APC ON
APC ON
APC OFF
(LDO=H)
-50%
0%
+50%
+12dB
+6dB
0dB
DA
(0dB)
DA
(0dB)
RW
(+12dB)
GVSW
VRO
FEO
FEN
RFRP
20K
20K
20K
15K
15K
10p
50u
20
µ
12K
20K
20K
20K
2K
40K
50K
50K
40K
10p
1.3V
1K
14K
2K
SBAD
TEO
TEN
TEB
SEL
LDO
MDI
TNI
TPI
FPI
FNI
VCC
80K
80K
20K
20K
240K
15p
240K
15p
180K
40p
40p
60k
60k
180K
40K
20K
30K
3K
20K
12K
RFGC
AGCI
RFO
RFN
GND
RFIS
RFGO
3K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
BOTTOM
PEAK
PEAK
K
x0.5
x2
x2
x0.5
1
Click on the first or last page to see other CD-CH1500 (serv.man8) service manuals if exist.