LG CRD-8401B User manual

3
INTRODUCTION
GENERAL FEATURE
SPECIFICATIONS
1. MODEL: CRD-8481B
1) SUPPORTED SYSTEM
• IBM Compatible 486SX or Above (With PIO mode 4 recommended)
2) SUPPORTED OS
3) GENERAL PERFORMANCE
• Data Transfer Rate .........................................................................................Sustained Data Transfer Rate
20Times Speed (Inner side) : 3,000 kbytes/sec
48 Times Speed (max., Outer side) : 7,200 kbytes/sec
• Data Buffer Capacity.....................................................................................................................128 kbytes
• Access Time...................................................................................................Random Access Time : 75 ms
4) POWER REQUIREMENTS
• Voltage ......................................................................................................................................+5V DC +5%
+12V DC +5%
• Ripple ..................................................................................................................+5V : Less than 100mVp-p
+12V : Less than 100mVp-p
• Current .......................................................................................................................+5V : 0.9A (Maximum)
+12V : 1.5A (Maximum)
5) AUDIO PERFORMANCE
• Frequency Response.....................................................................................................20Hz~20KHz(+3dB)
• S/N Ratio (IHF-A+20 KHz LPF) .......................................................................85 dB (Typical at 1 KHz 0dB)
80 dB (Limit at 1 KHz 0dB)
• T.H.D. (IHF-A+20 KHz LPF) ............................................................................0.05% (Typical at 1 KHz 0dB)
0.15% (Limit at 1 KHz 0dB)
• Channel Separation (IHF-A+20 KHz LPF) .............................................................................80 dB (Typical)
70 dB (Limit)
• Output Voltage (1kHz 0dB) 47KΩLoad.................................................................................0.7Vrms +10%
• Headphone Level (1kHz 0dB) 33ΩLoad...............................................................................0.7Vrms +20%
• Enhanced IDE interface
• Internal 5.25 inch, halfheight CD-ROM Drive
• Fast 75ms Average Access Time
• Max 7,200KB/sec Sustained Transfer rate
• CRD-8481B: Max 7,200 KB/sec Sustained
Transfer rate
• CRD-8401B: Max 6,000 KB/sec Sustained
Transfer rate
• Photo-CD Multisession Disc Spec compliant
• Multimedia MPC-3 Spec compliant
• Power Tray Loading/Ejection Mechanism
• 3 Way Eject support
(Software, O/C Button, Emergency Eject)
• Closed Enclosure
• Built-in ATAPI Interface Controller
• Software Volume Control
• 8 Times Digital Filter for CD Audio
• Front panel Volume Control for Headphone Output
• Built-in MODE-1 ECC/EDC
• MTBF 125,000h POH (at 10% Utilization)
• PIO Mode 4 & Multi DMA Mode 2 support
• Horizontal or Vertical Mounting
• Digital audio output connector
• Digital audio through ATAPI Interface
• Subcode (P-W) through ATAPI Interface
• Spin-down Mode for energy saving
• MS-DOS Version 3.1 or Higher
• Windows '95/'98
• Solaris Ver 2.4 or Higher
• Linux slackware Ver 2.3
• Windows NT 4.0 or later
• OS/2 Warp (Ver 3.0)
This service manual provides a variety of service
information. It contains the mechanical structure of
the CD-ROM Drive together with mechanical
adjustments and the electronic circuits in schematic
form. This CD-ROM Drive was manufactured and
assembled under our strict quality control standards
and meets or exceeds industry specifications and
standards.

4
2. MODEL: CRD-8401B
1) SUPPORTED SYSTEM
• IBM Compatible 486SX or Above (With PIO mode 4 recommended)
2) SUPPORTED OS
3) GENERAL PERFORMANCE
• Data Transfer Rate .........................................................................................Sustained Data Transfer Rate
18Times Speed (Inner side) : 2,700 kbytes/sec
40 Times Speed (max., Outer side) : 6,000 kbytes/sec
• Data Buffer Capacity.....................................................................................................................128 kbytes
• Access Time...................................................................................................Random Access Time : 75 ms
4) POWER REQUIREMENTS
• Voltage ......................................................................................................................................+5V DC +5%
+12V DC +5%
• Ripple ..................................................................................................................+5V : Less than 100mVp-p
+12V : Less than 100mVp-p
• Current .......................................................................................................................+5V : 0.9A (Maximum)
+12V : 1.5A (Maximum)
5) AUDIO PERFORMANCE
• Frequency Response.....................................................................................................20Hz~20KHz(+3dB)
• S/N Ratio (IHF-A+20 KHz LPF) .......................................................................85 dB (Typical at 1 KHz 0dB)
80 dB (Limit at 1 KHz 0dB)
• T.H.D. (IHF-A+20 KHz LPF) ............................................................................0.05% (Typical at 1 KHz 0dB)
0.15% (Limit at 1 KHz 0dB)
• Channel Separation (IHF-A+20 KHz LPF) .............................................................................80 dB (Typical)
70 dB (Limit)
• Output Voltage (1kHz 0dB) 47KΩLoad.................................................................................0.7Vrms +10%
• Headphone Level (1kHz 0dB) 33ΩLoad...............................................................................0.7Vrms +20%
• MS-DOS Version 3.1 or Higher
• OS/2 Warp (Ver 3.0)
• Windows '95/'98
• Solaris Ver 2.4 or Higher
• Linux slackware Ver 2.3
• Windows NT 4.0 or later

5
LOCATION OF CUSTOMER CONTROLS
(1) Headphone Jack
3.5mm jack for monitoring the audio signal from audio
CDs.
(2) Headphone Volume Control
Adjusts the headphone sound level.
(3) Disc Drawer
Accepts a CD-ROM disc on its tray.
(4) Busy Indicator
The Busy Indicator lights during initialization and data-
read operations.
(5) Emergency Eject Hole
Insert a paper clip here to eject the drawer manually or
when there is no power.
(6) Play/Skip Button
When an Audio CD is in the Disc Drawer, pressing
this button will start playing audio CDs from the first
track. If an audio CD is playing, pressing this button
will skip to the next track.
(7) Open/Close/Stop Button
This button is pressed to open or close the CD tray.
If an audio CD is playing, pressing this button will stop
it, and pressing it again will open the tray.
COMPACT
1254 6 73
Figure 1. Front View
(1) Digital Audio Output Connector
This is a digital audio output connector or Video CD
output connector.
You can connect this to the digital audio system or
Video CD Board.
(2) Analog Audio Output Connector
The Audio Output Connector connects to a sound
card.
The supplied audio cable is a SoundBlaster®type
cable. If you have a different sound card, you will
need to contact the sound card manufacturer to obtain
the proper cable for that card.
(3) Master / Slave / CSEL Jumper
These three jumpers are used to set the CD-ROM
Drive to either a Master, Slave, or CSEL drive.
(4) Interface Connector
This 40-pin connector is used to transfer and control
signals between the CD-ROM Drive and your PC.
Connect the 40-pin IDE cable in your PC to this
connector.
(5) Power-in Connector
Attach a power cable from the computer to this
connector.
Figure 2. Back View
DIGITAL ANALOG
INTERFACE POWER
DR CSM
SLA
GLG39 1+5 +12
GND
40 2
AUDIO AUDIO
125
4
3
FRONT
REAR
Figure 2. Back View

1. CABINET and CIRCUIT BOARD
DISASSEMBLY
1-1. Bottom Chassis
A. Release 4 screws (A) and remove the Bottom
Chassis in the direction of arrow (1). (See Fig. 1-1)
1-2. Front Bezel Assy
A. Insert and Press a rod in the Emergency Eject
Hole and then the CD Tray will open in the
direction of arrow (2).
B. Remove the Tray Door in the direction of arrow (3)
by pushing it outward.
C. Release 3 stoppers and remove the Front Bezel
Assy.
1-3. Cabinet and Main Circuit Board
A. Remove the Cabinet in the direction of arrow (4).
(See Fig. 1-3)
B. Release 2 hooks (a) and remove the CD Tray.
C. Remove the Soldering of the LD- and LD+ (B) for
the Loading Motor, and then remove the Main
Circuit Board.
D. At this time, be careful not to damage the 3
connectors of the Main Circuit Board.
2. MECHANISM ASSY
A. Separate the Pick-Up Unit from the Mechanism
Assy.
B. Release 1 screws (C) and then remove the Pick-
Up ( ).
DISASSEMBLY
(A)
(A)
(A)
(A)
(1)
Bottom Chassis
(3)
(2)
Tray Door
Stoppers
CD Tray
Emergency Eject Hole Front Bezel Assy
(4)
Hooks (a)
Cabinet
Main
Circuit Board
(B)
Mechanism Assy
(C)
Pick-up Unit
Fig. 1-1
Fig. 1-2
Fig. 1-3
Fig. 1-4
6

2. Trouble List (Circuit)
A. LED doesn’t light.
B. Pick-Up doesn’t move to the inner-track.
C. The Laser of Pick-Up doesn’t light.
D. Pick-Up lens doesn’t move up and down.
E. Disc doesn’t rotate.
F. TOC isn’t read. (The LED turns on, but doesn’t flicker.)
G. During Audio CD Play, LED flickers, but Speaker is silent.
21
TROUBLESHOOTING GUIDE
1. Initial Lead-in Operation
Reset or Power-On.
LED Flickers.
Pick-Up moves to the inner-Track.
Laser on the Pick-Up lights.
Focus Search (through moving up and down the lens of Pick-Up)
Focus Servo On (FOK Port : H, FEO(TP15) signal generation)
Rotate disc.
Tracking Servo On (TEO(TP14) Signal generation)
Spindle Servo On (MDP(TP25) Signal generation)
Read TOC Area (LED Flickers)
Search the Start of Data Area and then pause.

22
3. Troubleshooting Guide
A. LED doesn’t light.
Check Power Voltage
(TP1:3.3V, TP2:12V, TP20:2.7V)
Reference Voltage
[TP3:DVC(1.35V) and GND.]
Does “H” output in IC501
pin ?
Check and replace R705,
R706, Q701 and LED701
(LED703 for DELL).
Is the CLOCK Frequency of
IC501 pin 33.86MHz?
Check the power input
pattern.
Check IC501.
Check and replace
X501; 33.86MHz,
X502: 40MHz
Is the CLOCK Frequency
of IC501 pin 33.86MHz?
Check and replace IC501.
YES
OK
NG
YES
YES
NO NO
NO
109 171
171
A-1
A-1

23
B. Pick-Up doesn’t move to the inner track.
Do the signals appear at
IC501 pin , ?
(Refer to Fig. B-1.)
Do the signals appear in
PN301 pin?
(Refer to Fig. B-2.)
Does “H” output at IC201
pin ?
Is the 1.35V at IC201 pin ?
Check the pattern from
IC501 pin to IC201
pin
.
Check IC501.
Check the R190 and
then replace IC102.
Check the PN301, and then
replace the Sled Motor.
YES
YES
YES
YES
NO
NO
Replace IC201.
NO
NO
73
41
25
74
106
41
CH1
PIN74
DA0
CH2
PIN73
DA1
CH1 TP4
CH2 TP5
CH3 TP6
CH4 TP7
Fig. B-1. DA0 and DA1 Signals Fig. B-2. TP4, TP5, TP6 and TP7 Signals

Check the pattern from
IC501 pin to R225
and then replace IC501.
24
Does “Low” or “High”
output at IC102 pin ?
Is the voltage of IC102 pin
(LD) 2V?
Check Pick-Up FFC, PN101.
Check Q101, C101, C102
and then replace IC102.
Check R118 and replace IC501.
YES
YES
NO
NO
1
4
12
Does the focus search signal
appear at FAO (TP9)?
(Refer to Fig. D-1.)
Is the 1.35V at IC201 pin ?
Check the R190 and then
replace IC102.
YES
YES
YES
NO
NO
Replace IC201.
NO
25
Does the focus search
signal appear between F+
(TP10) and F- (TP11)?
(Refer to Fig. D-2.)
C. The Laser of Pick-Up doesn’t light.
D. The Pick-UP lens doesn’t move up and down.
D-1

25
Check the pattern from
pin , of IC201 to
pin , of PN101.
Check the PN101, Pick-Up
FFC.
Replace the Pick-Up.
Replace PN101 or Pick-Up
FFC.
OK
OK
NG
34 35
14
CH1
TP9
(FAO)
CH1
TP10(F+)
TP11(F-)
Fig. D-1. FAO Signal Fig. D-2. Focus Search Signal
D-1

26
Does the signal appear at
the MDP (TP25)?
(Refer to Fig. E-4.)
Do the signals appear at
IC201 pin (W), (V),
and (U)?
Replace IC501.
Replace IC201.
YES
NO
NO
12
14
13
Check the pattern from
IC201 pin , , to
PN201 , , .
YES
OK
12 13 14
13 12 11
Check Spindle Motor FFC
and then replace the
Spindle Motor.
Does the signal appear at
FEO (TP15) when the
R504 opened?
(Refer to Fig. E-2.)
YES
YES YES
NO NO
Replace IC501.
Replace IC501.
Replace Pick-Up.
NO
Do the signal appear at
TP15 (FEO)?
(Refer to Fig. E-3.)
Does the signal appear at
FOK (TP18) during focus
search?
(Refer to Fig. E-1.)
E. Disc doesn’t rotate.

27
Fig. E-3. FEO Signal
CH1
TP15:
FEO
Fig. E-4. MDP Signal
CH1
TP25:
MDP
Fig. E-1. FOK, F+ Signal
CH1
TP10:
F+
CH2
TP18:
FOK
Fig. E-2. S-Curve (R505:Open)
CH1
TP15:
S-Curve

28
Is the Focus Servo ON?
(Does FEO (TP15) signal
appear?)
Does A, B, C, D signal
appear at IC102 pin ,
, , ?
YES YES
NO
6
7 8 9
NO
Is the Tracking Servo ON?
(Does TEO (TP14) signal
appear?)
Does E, F signal appear
at IC102 pin , ?
YES
NO
10
YES
Is TOC area on the disc
read? (Does LED flicker?)
Does the other disc
operate normally?
Normal Disc is defective.
YES YES
NO
11
NO
Does RFAC signal (TP16)
and RFDC signal (TP17)
appear?
Is Spindle Servo ON?
(Does MDP signal (TP25)
appear?)
YES YES
NO
NO
NO
Does A, B, C, D signal
appear at IC102 pin ,
, , ?
6
7 8 9
Replace IC102.
Replace IC102.
Replace IC501.
Replace Main Circuit
Board or MD Ass’y.
NO
Refer to C.
(The Laser of Pick-Up
doesn’t light.)
F. TOC isn’t read.

29
Does PWM signal appear at
IC501 pin , , , ?
(Refer to Fig. G-1.)
YES
NO
166 167 174 175
Replace IC501.
Replace IC601.
Does Audio signal appear
at IC601 pin , ?
(Refer to Fig. G-2.)
YES YES
NO
312 Is the voltage of IC601
pin and 2.5V?
9
NO
Check the C602.
8
Does “H” signal appear at
IC501 pin ?
YES
NO
108
Check the IC501 pin
and then replace IC401.
108
Check C702.
YES
YES
YES
Are L-ch, R-ch signals
appear at JK701 and
Audio Line out connector
each?
NO Check JK701 and
L701,L703.
Does Audio signal appear
at IC701 pin , ?
NO
1 7
Is the voltage of IC701
pin 2.5V?
6
NO Replace IC701.
G. During Audio CD play, LED flickers, but Speaker is silent.
G-1

30
Is the connection
between JK801 (or Audio
Line out connector) and
Line (or Jack) normal?
NO Check the JK801 and
Audio line pattern.
YES
Check your sound card,
Audio Cable, Speaker,
Volume and Headphone
Jack.
Fig. G-1. PWM Signal
CH1
PIN6 of
IC601
CH2
PIN10 of
IC601
Fig. G-2. Audio Signal
CH2
PIN3 of
IC601
CH2
PIN12 of
IC601
G-1

12
PHOTO DIODE STRUCTURE OF THE PICK-UP
(1) Focus Error Signal –> (A+C)-(B+D)
(Control the Pick-up’s up and down to focus on the Disc)
(2) Tracking Error Signal –> (E-F)
(Control the Pick-up’s left and right shift to find the track on the Disc)
(3) RF Signal –> (A+B+C+D)
( RF Signal is converted to Data Signal in One Chip IC (IC501))
Three signals (Focus Error Signal, Tracking Error Signal and RF Signal) above are I-V converted and
amplified at the IC102, and then are transmitted to One Chip IC (IC501) to generate the Servo Control
Signal and Data Signal.
Red laser
Pick-Up module
Tracking
Focusing
B
C
EF
D
A

13
AC SUM
AC VCA EQ
EQ_ON/OFF
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
VC
VC VC
DVC
DVC
DVcc
DVcc
DVcc
DVcc
DVcc
VOFST
A
A
B
B
C
C
D
D
6
4 3 23 24 26 25
7 8 9
E10 F11
12
22 5 27 14
gm
gm
VOFST
VOFST
DVC
DVC
DVC
DVC
AVC
AVC
AVC
Vcc
Vcc
APC-OFF (Hi-Z)
(H/L)
APC
SW
PD LD
Vcc
GND
AVC
DVC
2 1
13
CE
20
CEI TE
21
18
TE_BAL
19
FE
16
FEI
RFDCO RFDCI DC_OFST
17
28 29 30
RFAC
15
AC_SUM
EQ_IN
RFG
BST
RFC
VFC
Pin No. Symbol I/O Description Pin No. Symbol I/O Description
1 LD O APC Amp Output 16 FE O Focus Error Amp Non-inverted Output
2 PD I APC Amp Input 17 FEI –Focus Error Amp Inverted
3EQ
–IN I
RFAC VCA Block, EQ Block Input 18 TE O Tracking Error Signal Output
4AC
–SUM O
RFAC RF SUM Output 19 TE_BAL I TE Control
5 GND I GND 20 CE O Center Error Signal Output
6 A I RF Input (A Signal) 21 CEI –CE Amp Inverted
7 B I RF Input (B Signal) 22 Vcc I Vcc
8 C I RF Input (C Signal) 23 RFG I RFAC Low Frequency Gain Control
9 D I RF Input (D Signal) 24 BST I EQ Boost Volume Control
10 E I RF Input (E Signal) 25 VFC I EQ Cut OFF Frequency Control
11 F I RF Input (F Signal) 26 RFC I EQ Cut OFF Frequency Control
12 SW I
Mode Switching Signal Input 27 VC O VC Output
13 DVcc I DVcc 28 RFDCO O RFDC Output
14 DVC O DVC Output 29 RFDCI –RFDC Amp Inverted
15 RFAC O RFAC Summing Equalized Output 30
DC_OFST –RFDC Signal Output Control
Pin Description
IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION
•IC102 (CXA2581N) : RF Amplifier IC
I-V converts and amplifies the signal received from the pick-up and then applies to DSP part of one-
chip IC (IC501).
Block Diagram

14
•IC201 (M63021FP) : Drive IC (Spindle/Servo Actuator)
Rotates the Spindle Motor by receiving MDP signal from IC501.
Generates the signal to drive Focus Actuator Coil, Tracking Actuator Coil, Sled Motor, and Stepping
Motor by Control Signal input from DSP and u-COM.
Block Diagram
x12 x8
x12
FG
HU+
HU-
HV+
HV-
HW+
HW-
HB
SPIN
REF
SL1IN
SL2IN
FOIN
TOIN
5Vcc
TO+
TO-
FO+
FO-
GND
LO+
LO-
VM3
LOIN+
BRS
OSC
MU1
S
SS
S
VM1 RSP U V
W
RSL1 RSL2 SL1+ SL1- SL2+ SL2- VM2
FG Reverse
Detect
120ß
MATRIX
Hall Bias
CTL
amp
Direction
comp
Direction
comp Direction
comp
Current
comp
Current
comp Current
comp
CTL
amp CTL
amp
Logic Logic
TSD
BIAS
Frequency
generator
VM1
Regulator
Reg
Pin Description
Pin No. Symbol Description Pin No. Symbol Description
1 SL1IN Slide control voltage input 1
2 SL2IN Slide control voltage input 2
3 VM2 Motor Power Supply 3 (for Slide)
4 RSL2 Slide current sense 2
5 SL2+ Slide non-inverted output 2
6 SL2- Slide inverted output 2
7 GND GND
8 RSL1 Slide current sense 1
9 SL1+ Slide non-inverted output 1
10 SL1- Slide inverted output 1
11 GND GND
12 W Motor drive output W
13 V Motor drive output V
14 U Motor drive output U
15 RSP Spindle current sensie
16 HW- HW- sensor amp. input
17 HW+ HW+ sensor amp. input
18 HV- HV- sensor amp. input
19 HV+ HV+ sensor amp. input
20 HU- HU- sensor amp. input
21 HU+ HU+ sensor amp. input
22 VM1 Motor Power Supply 1 (for Spindle)
23 HB Bias for Hall Sensor
24 FG Frequency generator output
25 REF Refernce voltage input
26 SPIN Spindle control voltage input
27 FOIN Focus control voltage input
28 TOIN Tracking control voltage input
29 GND GND
30 5VCC 5V Power Supply (for FS, TS)
31 TO- Tracking inverted output
32 TO+ Tracking non-inverted output
33 GND GND
34 FO+ Focus non-inverted output
35 FO- Focus inverted output
36 LO+ Loading non-inverted output
37 LO- Loading inverted output
38 BRS Brake select control terminal
39 VM3 Motor power supply 3.(for Loading)
40 LOIN+ Loading control input(+)
41 MU1 Mute 1
42 OSC PWM carrier oscilation set

1Mbits DRAM
CLOCK
GEN
DATA
processor
DMA SEQUENCER
ADDRESS GEN
(Serial I/F)
CLOCK
GEN
PRIORITY RESOLVER
Subcode
Deinterleave & ECC
MAIN DATA
ERROR CORRECTION
ATAPI REGISTERS
12byte PACKET FIFO
HOST
I/F
DESCRAMBLER
SYNC CONTROL
Sub CPU I/F
DRVss
DRVDD
HDB0~F
139~142, 145~148, 151~154, 156~159
HCS0,1
123~125
121,122
HA0~2
XHRD XHWR XHAC HDRQ HINT XS16 REDY
D0~7*
A0~6*
DASP XPDI HAST
137 119 120
130 127 128 136 129 135 134
DMA FIFO
Digital OUT
8fs
1bit DAC
Error
Correction
block
Subcode P~W
Processor
32K RAM
EFM
Timing Generator
Subcode Q
Processor
XRD*
XWR*
XCS*
XTL1
XINT*
XWAT*
XTL2
PWM2N
PWM2P
FOK
PWM1N
175 167 166 161 162
PWM1P
MIRR
DFCT
174
OP Amp
DACSERVO DSP
Auto Sequencer
8bit
A/D
OP Amp
Analog SW
SAO
TAO
FAO
BSSD
DOUT
DAC
I/F
CD-DSP
I/F
CPU Interface
FOK
MIRR
DFCT
XTLO XTLI
170 171
Digital PLL
ASY
Sync protector
PCO
VDD
Vss
52
FILI 51
FILO 50
CLTV 53
ASYI 57
ASYO 58
WFCK
SCOR*
29
RFDC
CE
TE
SE
FE
VC
SQCK*
SQSO*
SENS*
COUT*
MDP
PWMI
ADIO
RFAC 55
CLV/CAV
Processor
SERVO BLOCK
DAC BLOCK
DATA BLOCK
19 20
41 42 43 44 45 46 47
5 4 3 2 21 65 64 16
15
•IC501 (CXD3035R) : DSP+ATAPI DECODER+DRAM+µ-COM
Block Diagram *is connected to µ-com port inside.

16
•IC501 CXD3035R
Pin Description
Pin No. Symbol I/O Description
1 AVS6 Analog GND
2 SAO O Analog DAC Analog Output of Slide Filter
3 TAO O Analog DAC Analog Output of Tracking Filter
4 FAO O Analog DAC Analog Output of Focus Filter
5 BSSD I Constant Current Input for DAC Analog of Servo Filter
6 AVD6 Analog Power Supply (2.5V)
7 VSIO0 Digital GND
` 8 SFDF O 1,0 Control Output of stepping Motor
9 SFDR O 1,0 Control Output of stepping Motor/SLED drive
10 SRDF O 1,0 Control Output of stepping Motor
11 SRDR O 1,0 Control Output of stepping Motor/SLED drive
12 VDC0 Digital Power Supply (2.5V)
13 RMUT O 1,0 Audio DAC, Rch Zero Detection Play/PWM0*/COUT*/Signal Output
14 LMUT O 1,0 Audio DAC, Lch Zero Detection Play/RWM1* Signal Output
15 VSC0 Digital GND
16 DOUT O 1,0 Digital-Out Output
17 VDIO0 Digital Power Supply (3.3V)
18 SSTP I Disc Inner Track Detection Signal Input
19 MDP O 1,Z,0 Control Output of Spindle Motor
20 PWMI I External Terminal Input of Spindle Motor
21 DFCT I/O 1,0 Defect Signal In/Output
22 ATSK I Pin for Anti-Shock. It set to “L”When is not used.
23 MNT0 O 1,0 MNT0/XRAOF* Signal Output
24 MNT1 O 1,0 MNT1/C2PO* Signal Output
25 MNT2 O 1,0 MNT2/XUGF* Signal Output
26 MNT3 O 1,0 MNT3/GTOP* Signal Output
27 XPLCK O 1,0 XPLCK/WDCK*/C2PO*/PWM4* Signal Output
28 VSIO1 Digital GND
29 WFCK O 1,0 WFCK/LRCK*/BLRCK*/PWM2* Signal Output
30 RFCK O 1,0 RFCK/PCMD*/BPCMD*/PWM3* Signal Output
31 LOCK O 1,0 LOCK/BCK*/BBCK* Signal Output
32 VDC1 Digital Power Supply (2.5V)
33 MTST3 I Test Pin. Normally “L”
34 VSC1 Digital GND
35 MTST2 I Test Pin. Normally “L”
36 MTST1 I Test Pin. Normally “L”
37 VDIO1 Digital Power Supply (3.3V)

17
Pin No. Symbol I/O Description
38 AVD2 Analog Power Supply (2.5V)
39 IGEN I Resistor Connection Pin of Current Source Reference for OP Amp
40 AVS2 Analog GND
41 ADIO O Analog OP Amp Output
42 RFDC I RF Signal Input
43 CE I Center Servo Analog Input
44 TE I Tracking Error Signal Input
45 SE I Slide Error Signal Input
46 FE I Focus Error Signal Input
47 VC I Center voltage Input
48 VPCO1 O 1,Z,0 Output of VCO2 for Wide-Band EFM PLL
49 VCTL I Input of VCO2 Control voltage for Wide-Band EFM PLL
50 FILO O Analog Filter Output for Master PLL (Slave = Digital PLL)
51 FILI I Filter Input for Master PLL
52 PCO O 1,Z,0 Change Pump Output for Master PLL
53 CLTV I Multiplier VCO Control Voltage Input
54 AVS1 Analog GND
55 RFAC I EFM Signal Input
56 BIAS I Asymmetry Circuit Constant Current Input
57 ASYI I Asymmetry Comparator Voltage Input
58 ASYO O 1,0 EFM Full-Swing Output (L=VSS, H=VDD)
59 AVD1 Analog Power Supply (2.5V)
60 VDC2 Digital Power Supply (2.5V)
61 VDC3 Digital Power Supply (2.5V)
62 VSC2 Digital GND
63 VSC3 Digital GND
64 FOK I/O 1,0 Focus OK Signal IN/OUT
65 MIRR I/O 1,0 Mirror Signal IN/OUT
66 GFS O 1,0 GFS Output
67 PG7/SCKZ0 Serial Clock In/Output port
68 PG6/SO0 I/O 1,0 Serial Data Output
69 PG5/SI0 Serial Data Input
70 PG4/SCSZ0 Serial chip select Input
71 PG3/XWP (Port G) In/Output port as 1 bit Write protect output port
72 PG2/XONBR I/O 1,0 Active Hard Reset Input port
73 PG1/PWM1/DA1
74 PG0/PWM0/DA0
75 DRVDD0 Internal DRAM Exclusive Power Supply
(Port G)
IN/Output port as 1 bit
(Port G)
IN/Output port as 1 bit 14 bit PWM Output port DA Gate pulse Output port