Marantz CR710/F1W Service Manual page 11

IC61 : TA2150FN (RF/DIGITAL SERVO)
BLOCK DIAGRAM
PIN FUNCTION
PIN No. NAME I/ O
1 VCC - Power supply input terminal
RF amplitude adjustment control signal input
2 RFGC I terminal. Controlled by 3 PWM signal
(PWM carrier = 88.2 kHz)
Open loop gain adjustment terminal for AGC amp.
3 GMAD I
Main beam l-V amp input terminal.
4 FNI I
Main beam l-V amp input terminal.
5 FPI I
Sub beam l-V amp input terminal.
6 TPI I
Sub beam l-V amp input terminal.
7 TNI I
Monitor photo diode amp input terminal.
8 MDI I
Laser diode amp input terminal.
9 LDO O
Laser diode control signal input terminal and APC
circuit ON/OFF control signal terminal.
SEL
SW1
SEL I GND ON
10
OFF
HIZ
Vcc OFF
Tracking error balance adjustment signal input terminal.
11 TEN I Controlled by 3-PWM signal.
(PWM carrier = 88.2 kHz)
12 2VRO O Reference voltage (2vro) output terminal.
2VRO=4.2V when Vcc=5V
13 TEN I TE amp negative input terminal.
14 TEO O TE error signal output terminal.
15 SBAD O Sub beam adder signal output terminal.
16 FEO O Focus error signal output terminal.
17 FEN I FE amp negative input terminal.
RFRP output circuit switching terminal.
SEB
GND
18 SEB I
HIZ
Vcc
19 VRO O Reference signal(VRO) output terminal.
VRO = 2.1V when Vcc=5V
20
RFRP O Track count signal output terminal.
21
BTC I Time constant adjustment terminal for bottom detection.
DESCRIPTION REMARK
3 signal input
(2 VRO, VRO, GND)
(Note1)
Connected to pin diode
output B+D
(through resistor).
Connected to pin diode
output A+C
(through resistor).
Connected to pin diode
output F.
Connected to pin diode
output E.
Connected to monitor photo
diode.
Connected to laser diode control
circuit.
LDC
RFRP Detct
Frequency
SW2 SW3
OFF OFF LOW
3 signals input.
ON ON
LOW
ON ON High (Vcc, HIZ,GND)
3 signals input.
(2VRO, VRO, GND)
-
Connected to TEO through
feedback resistor.
-
-
-
Connected to FEO through
feedback resistor.
Bottom Detect Peak Detect
Low(GND) is for nomal use.
ON ON
ON ON
OFF ON
-
-
Adjusted by capacitance.
PIN No. NAME I/ O
-
22 RFCT O
23 PKC I
24 RFRPIN I
25 RFGO O
26 GVSW I
27 AGCIN I
28 RFO O
29 GND -
30 RFN2 I
15
+
DESCRIPTION
RFRP signal center level output terminal.
Time constant ajustment terminal for peak detection.
Input terminal for track count signal output amp.
Output terminal for RF signal amplitude adjustment amp.
Amp(AGC, FE, TE) gain switching terminal.
GVSW
Mode
GND CD-RW
HIZ
Nomal
Vcc
Input terminal for RF signal amplitude adjustment amp.
Output terminal RF signal amp.
Ground terminal.
Input tetminal for RF signal amp.
REMARK
-
Adjusted by capacitance.
-
-
Low(GND) is for 5 times gain.
Connected to RFO through
capacitance.
-
-
Connected to pin-diode
output A+B+C+D
(through resistor.