Aiwa 6ZG-1 Service Manual page 17

IC DESCRIPTION
IC, LC78641NE-D
Pin No. Pin Name
1 PDO1
2 PDO2
3 VVSS
4 PCKIST
5 VVDD
6 FR
7 HFL
8 SLCIST
9 SLCO
10 EFMIN
11 JITTV
12 JITTC
13 BH
14 PH (RFENV)
15 FE
16 TE
17 VREF
18 ADAVDD
19 ADAVSS
20 PHREF
21 BHREF
22 TBLO
23 TDO
24 FDO
25 SPDO
26 SLDO
27 DVREF/FG
28 LASER
29 CONT1
30 CONT2
31 CONT3
32 CONT4
33 CONT5
34 PCK
35 C2F
36 VDD
37 DOUT
38 FSX
I/O
O Internal VCO control phase comparator output pin. (Pull down)
Internal VCO control phase comparator output pin.
O
OFF for rough servo, ON for phase servo. (Pull down)
— Internal VCO ground pin.
— PDO output current adjustment resistor connection pin.
— Internal VCO power supply pin.
— VCO frequency range adjustment resistor connection pin. (Pull up)
I Mirror detection signal input pin.
— SLCO output current adjustment resistor connection pin.
O Control output.
I EFM signal input pin.
O Jitter detection monitor pin. (Not connected)
O Jitter detection adjustment pin. (Pull down)
I BH signal input pin. (Connected to GND)
I PH signal or RFENV signal input pin.
I FE signal input pin.
I TE signal input pin.
I VREF input pin.
— Servo A/D, D/A power supply pin.
— Servo A/D, D/A ground pin.
O PH reference output pin. (Not connected)
O BH reference output pin. (Not connected)
O Tracking balance output pin.
O Tracking control output pin.
O Focus control output pin.
O Spindle control output pin.
O Thread control output pin.
I/O Output driver VREF output pin. FG signal input pin. (Connected to GND)
O Laser ON/OFF control pin.
I/O General-purpose input/output pin 1. (Connected to GND)
I/O General-purpose input/output pin 2. (Connected to GND)
I/O General-purpose input/output pin 3. (Connected to GND)
I/O General-purpose input/output pin 4.
I/O General-purpose input/output pin 5. (Not connected)
EFM data playback clock monitor pin. Average 4.3218MHz when the phase is locked.
O
(Not connected)
O C2 flag output pin. (Not connected)
— Digital power supply pin.
O Digital out output pin. (EIAJ format)
Output pin for the 7.35kHz synchronization signal divided from the crystal oscillator.
O
(Not connected)
21
Description