Sony MDS-DRE1, Service Manual

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6-24. IC PIN FUNCTION DESCRIPTION
•
BD BOARD IC101 CXA1981AR (RF AMP, FOCUS/TRACKING ERROR AMP)
Pin No. Pin Name I/O Function
1 VC O
Middle point voltage (+2.5V) generation output terminal
2 to 7 A to F I
Signal input from the optical pick-up detector
8 FI I
Operational input for the F signal
9 FO O
Operational output for the F signal
10 PD I
Light amount monitor input from the optical pick-up block laser diode
11 APCREF I
Reference voltage input terminal for setting laser power
12 TEMPI I
Connected to the temperature sensor
13 GND —
Ground terminal
14 AAPC O
Laser amplifier output terminal to the automatic power control circuit
15 DAPC O
Not used (open)
16
TEMPR O
Output terminal for a temperature sensor reference voltage
17 XRST I
Reset signal input from the system controller (IC101) “L”: reset
18 SWDT I
Writing serial data input from the system controller (IC101)
19 SCLK I
Serial data transfer clock signal input from the system controller (IC101)
20 XLAT I
Serial data latch pulse signal input from the system controller (IC101)
21 VREF O
Reference voltage output terminal Not used (open)
22 TENV O
Not used (open)
23 THLD I
Connected to the external capacitor for set the internal circuit
24 VCC —
Power supply terminal (+5V)
25 TFIL I
Connected to the external capacitor for set the internal circuit
26 TE O
Tracking error signal output to the CXD2535CR (IC121)
27 TLB I
Adder signal input of the tracking error
28 CSLED I
Connected to the external capacitor for low-pass filter of the sled error signal
29 SE O
Sled error signal output to the CXD2535CR (IC121)
30 ADFM O
FM signal output of the ADIP
31 ADIN I
Receives a ADIP FM signal in AC coupling
32 ADAGC I
Connected to the external capacitor for ADIP AGC
33 ADFG O
ADIP duplex signal (22.05 kHz
±
1 kHz) output to the CXD2535CR (IC121)
34 AUX O
Auxiliary signal (I
3
signal/temperature signal) output to the CXD2535CR (IC121)
35 FE O
Focus error signal output to the CXD2535CR (IC121)
36 FLB I
Adder signal input of the focus error Not used (open)
37 ABCD O
Light amount signal (ABCD) output to the CXD2535CR (IC121)
38 BOTM O
Light amount signal (RF/ABCD) bottom hold output to the CXD2535CR (IC121)
39 PEAK O
Light amount signal (RF/ABCD) peak hold output to the CXD2535CR (IC121)
40 RFAGC I
Connected to the external capacitor for RF auto gain control circuit
41 RF O
Playback EFM RF signal output to the CXD2535CR (IC121)
42 ISET I
Connected to the external capacitor for set the internal circuit 22 kHz, BPF center frequency
43 AGCI I
Receives a RF signal in AC coupling
44 RFO O
RF signal output terminal
45 MORFI I
Receives a MO RF signal in AC coupling
46 MORFO O
MO RF signal output terminal
47 I I
I-V converted RF signal I input from the optical pick-up block detector
48 J I
I-V converted RF signal J input from the optical pick-up block detector