Samsung SC-148B Service Manual page 5

PIN DESCRIPTIONS
PIN NO PIN NAME
1 VCC
2 RFGC
3 RPBW
4 FNI
5 FPI
6 TPI
7 TNI
8 MDI
9 LDO
10 SEL
11 TEB
12 VRO
13 TEN
14 TEO
15 SBAD
16 FEO
17 FEN
18 VDDIN
19 VREF
20 RFRP
21 BTC
22 RFCT
23 PKC
24 RFRPIN
25 RFGO
26 GVSW
27 AGCIN
28 RFO
29 GND
30 RFN2
POWER SOURCE/VOLTAGE TERMINAL
RF FREQUENCY CONTROL SIGNAL INPUT TERMINAL
SEL TERMINAL COMBINATIAU DETELTOR CONTROL TERMINAL
RPBW SEL
L / HiZ L / HiZ
L / HiZ L / HiZ
L / HiZ L / HiZ
MAIN BEAM AMP INPUT TERMINAL
MAIN BEAM AMP INPUT TERMINAL
SUB BEAM AMP INPUT TERMINAL
SUB BEAM AMP INPUT TERMINAL
MONITOR PHOTO-DIODE AMP INPUT TERMINAL
LASER DIODE AMP OUTPUT TERMINAL
APC CIRCHIT ON/OFF SIGNAL, LDO TERMINAL CONTROL INPUT TERMINAL.
BOTTOM/PEAK FREGUENCY SWITCH TERMINAL
SEL LEVEL APC CIRCUIT
GND OFF
HiZ ON
VDD ON
TRACKING ERROR BALANCE CONTROL SIGNAL INPUT TERMINAL
STANDARD VOLTAGE OUTPUT TERMINAL VCC=5.0V
TRACKING ERROR SIGNAL GENERATING AMP REVERSE INPUT TERMINAL
TRACKING ERROR SIGNAL GENERATING AMP OUTPUT TERMINAL
SUB BEAM ADDITIONAL SIGNAL OUTPUT TERMINAL
FOCUS ERROR SIGNAL GENERATING AMP OUTPUT TERMINAL
FOCUS ERROR SIGNAL GENERATING AMP REVERSE INPUT TERMINAL
VDD INPUT TERMINAL
STANDARD VOLTAGE(VREF)OUTPUT TERMINAL VDDIN=3.6[V] VREF=1.80[V]
SIGNAL GENERATING AMP OUTPUT TERMINAL FOR TRACK COUNTER
RECT SIGNAL GENERATING BOTTOM DETECTOR CONTROL TERMINAL
RFRP SIGNAL CENTER LEVEL OUTPUT TERMINAL
RFCT SIGNAL GENERATING PEAK DETECTOR CONTROL TERMINAL
SIGNAL GENERATING AMP INPUT TERMINAL FOR TRACK COUNTER
RF SIGNAL AMPLITUDE ADJUSTING AMP OUTPUT TERMINAL
AGC,TE, FE AMP GAIN SWITCH TERMINAL
GVSW LEVEL
GND
HIZ
VCC
RF SIGNAL AMPLITUDE ADJUSTING AMP INPUT TERMINAL
RF SIGNAL GENERATING AMP OUTPUT TERMINAL
GND TERMINAL
RF SIGNAL GENERATING AMP INPUT TERMINAL
FUNCTION
FC [kHz]
100
400
800
LDO
100
CONTROL SIGNAL OUTPUT
CONTROL SIGNAL OUTPUT
MODE
CD-RW
NORMAL
NORMAL
29
VRD=2.1V