Sony CSDMP-100 Service manual
CSD-MP100
SERVICE MANUAL
Ver 1.0 2003. 06
Section
Section
US Model
Canadian Model
AEP Model
UK Model
Australian Model
Model Name Using Similar Mechanism CFD-S200
CD
CD Mechanism Type KSM-213RDP
Optical Pick-up Name KSS-213R
Model Name Using Similar Mechanism NEW
TC
Tape Transport Mechanism T ype MF-MP100
E Model
AUDIO POWER SPECIFICATIONS (US model)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION
With 8-ohm loads, both channels driven from
150 - 6,300 Hz; rated 1.5 W per channelminimum RMS power, with no more than 10%
total harmonic distortion in AC operation.
Other Specifications
CD player section
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wave length: 780 nm
Emission duration: Continuous
Laser output: Less than 44.6 µW
(This output is the value measured at a distance of
about 200 mm from the objective lens surface on
the optical pick-up block with 7 mm aperture.)
Spindle speed
200 r/min (rpm) to 500 r/min (rpm) (CLV)
Number of channels
2
Frequency response
20 - 20,000 Hz +1/–2 dB
Wow and flutter
Below measurable limit
SPECIFICATIONS
Radio section
Frequency range
FM: 87.5 - 108 MHz
US, CND model:
AM: 530 - 1,710 kHz
TW, AUS, KR model:
AM: 531 - 1,611 kHz
AEP, UK, E4, E15, SP model:
AM: 531 - 1,611 kHz (9 kHz step)
530 - 1,610 kHz (10 kHz step)
Antennas
FM: Telescopic antenna
AM: Built-in ferrite bar antenna
Cassette-corder section
Recording system
4-track 2 channel stereo
Fast winding time
Approx. 120 sec. with Sony cassette C-60
Frequency response
TYPE I (normal): 80 - 10,000 Hz
– Continued on next page –
9-877-441-01
2003F04-1
© 2003. 06
CD STEREO RADIO CASSETTE RECORDER
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
1
CSD-MP100
General
Speaker
Full range: 10 cm dia.,
4 Ω, cone type (2)
Power output
2.0 W + 2.0 W (at 4 Ω, 10%
harmonic distortion)
Power requirements
For CD stereo radio cassette recorder:
US, CND, TW model:
120 V AC, 60 Hz
E4 model
200 - 240 V AC, 50/60 Hz
E15 model
220 - 240 V AC, 50/60 Hz
AEP, UK, AUS, SP model:
230 V AC, 50 Hz
KR model:
220 V AC, 60 Hz
9 V DC, 6 size D (R20) batteries
For remote control:
3 V DC, 2 size AA (R6) batteries
Power consumption
AC 10 W
Battery life
For CD stereo radio cassette recorder:
FM recording
Sony R20P: approx. 13.5 h
Sony alkaline LR20: approx. 24 h
Tape playback
Sony R20P: approx. 7.5 h
Sony alkaline LR20: approx. 15 h
CD playback
Sony R20P: approx. 2.5 h
Sony alkaline LR20: approx. 7 h
Dimensions
Approx. 390 × 170 × 259.5 mm (w/h/d)
3/8 × 6 3/4 × 10 1/4 inches) (incl. projecting parts)
(15
Mass
Approx. 4 kg (8 lb. 13 oz.) (incl. batteries)
Supplied accessories
AC power cord (1)
Remote control (RM-Z1S002) (1)
Design and specifications are subject to change without
notice.
•Abbreviation
CND : Canadian model
E4 : AC 200-240V area in E model
E15 : AC 220-240V area in E model
TW : Taiwan model
AUS: Australian model
SP : Singapore model
KR : Korean model
AEP, UK, E, AUS model
CLASS 1 LASER PRODUCT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARAT
This Compact Disc player is classified as a CLASS 1
LASER product.
The CLASS 1 LASER PRODUCT mark is located at the
bottom.
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270˚C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY P ARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
2
CSD-MP100
About “MP3”
What is the MP3
MP3 (MPEG 1 Audio Layer -3) is a standard technology and format
for compressing a sound sequence. The file is compressed to about
1/10 of its original size.
Sounds outside the range of human hearing are compressed while
the sounds we can hear are not compressed.
Playable “MP3” files on the player
You can only play MP3 files recorded by following requirements.
Usable media
CD-Rs and CD-RWs
Usable disc format
You can use ISO 9660 Level 1, Level 2 and Joliet extension format
discs. In some cases, MP3 files that are recorded in a format other
than these formats may not play normally or the file and folder
names may not be displayed correctly.
The major specifications of the usable disc format are as follows:
• Maximum directory steps: 8
• Usable characters for a file/folder name: A - Z, a - z, 0 - 9 and
_ (underscore)
• Maximum number of characters for a file name: 16 (8) including quotation marks and a 3-character extension code
Notes for saving files on the media
When the disc is inserted, the player reads all the files on that disc.
If there are many folders or non-MP3 files on the disc, it may take a
long time for play to begin or for the next MP3 file to start play.
Do not save unnecessary folders or files other than MP3 ones in the
disc to be used for MP3 listening.
We recommend that you do not save other types of files
or unnecessary folders on a disc that has MP3 files.
About “ID3 tag”
ID3 tag is a format for adding certain information (track title, artist
name and album title, etc.) to MP3 files.
This player conforms to Version 1.1 of the ID3 tag information,
“track title”, “artist name” and “album title” can be displayed.
Note
If you use a version other than 1.1, ID3 tag information will not be
displayed correctly.
Notes
•When naming, be sure to add the file extension “mp3” to the file
name.
• If you put the extension “mp3” to a file other than an MP3 file,
the player cannot recognize the file properly and will generate
random noise that could damage your speaker.
•The file name does not correspond to the ID tag.
The usable number of folders/files
• Maximum number of folders and files: 512 (in total)
Settings for compression software and writing software
•To compress a source for an MP3 file, we recommend setting
the transfer bit rate of the compression software to “44.1 kHz”,
“128 kbps” and “Constant Bit Rate”.
•To record up to the maximum capacity, set to the “halting of
writing”.
•To record at one time up to the maximum capacity on media that
has nothing recorded it, set to “Disc at Once”.
3
CSD-MP100
TABLE OF CONTENTS
1. SERVICING NOTES......................................................... 5
2. GENERAL............................................................................ 6
3. DISASSEMBLY
3-1. Cabinet Rear Assy............................................................... 9
3-2. Chassis CD Assy ................................................................. 9
3-3. Main Board, Tape Board ................................................... 10
3-4. Tape Mechanism Deck ...................................................... 10
3-5. Cassette Lid Assy .............................................................. 11
3-6. Display Board ...................................................................11
3-7. CD Block Assy.................................................................. 12
3-8. CD/MP3 Board ................................................................. 12
3-9. Optical Pick-up ................................................................. 13
3-10. Tuner Board....................................................................... 13
3-11. Power Trans Board ............................................................ 14
3-12. HRP301, HE301, Pinch Roller Arm Assy ......................... 14
3-13. M301, Belt ........................................................................ 15
4. MECHANICAL ADJUSTMENTS............................... 16
5. ELECTRICAL ADJUSTMENTS
Tape Section .......................................................................... 16
Tuner Section......................................................................... 17
CD Section ............................................................................ 18
6. DIAGRAMS
6-1. IC Pin Description............................................................. 19
6-2. Block Diagram – CD Section –......................................... 23
6-3. Block Diagram – Main Section –...................................... 24
6-4. Circuit Boards Location .................................................... 25
6-5. Printed Wiring Board – CD Section – ............................... 26
6-6. Schematic Diagram – CD Section –.................................. 28
6-7. Printed Wiring Board – Tuner Section – ........................... 29
6-8. Schematic Diagram – Tuner Section –.............................. 30
6-9. Printed Wiring Board – Main Section – ............................ 31
6-10. Schematic Diagram – Main Section (1/2) – ...................... 32
6-11. Schematic Diagram – Main Section (2/2) – ...................... 33
6-12. Printed Wiring Board – Tape Section – ............................. 34
6-13. Schematic Diagram – Tape Section – ............................... 35
6-14. Printed Wiring Board – Display Section – ........................ 36
6-15. Schematic Diagram – Display Section –........................... 37
6-16. Printed Wiring Boards – Power Supply Section – ............ 38
6-17. Schematic Diagram – Power Supply Section –................. 40
6-18. IC Block Diagrams............................................................ 41
7. EXPLODED VIEWS
7-1. Main Board Section .......................................................... 44
7-2. Cabinet Front (1) Section .................................................. 45
7-3. Cabinet Front (2) Section .................................................. 46
7-4. Chassis CD Section ........................................................... 47
7-5. Cabinet Rear Section......................................................... 48
7-6. Tape Mechanism Section .................................................. 49
7-7. CD Mechanism Section .................................................... 50
8. ELECTRICAL PARTS LIST......................................... 51
4
SECTION 1
solder
SERVICING NOTES
CSD-MP100
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the lid (CD), use
Chuck Plate Jig.
• Code number of Chuck Plate Jig: X-4918-255-1
PRECAUTION TO REPLACE OPTICAL BLOCK
(KSM-213RDP)
Body or clothes electrostatic potential could ruin laser diode
in the optical block. Be sure ground body and workbench,
and use care the clothes do not touch the diode.
1) After the connection, remove solder shown in the right figure.
5
CSD-MP100
SECTION 2
GENERAL
This section is extracted
from instruction manual.
PAUSE
STOP/EJECT
FF REW PLAY
REC
6
CSD-MP100
7
CSD-MP100
SECTION 3
DISASSEMBLY
• The equipment can be removed using the following procedure.
SET
3-1. CABINET REAR ASSY
(Page 9)
3-2. CHASSIS CD ASSY
(Page 9)
3-3. MAIN BOARD,
TAPE BOARD
(Page 10)
3-4. TAPE MECHANISM DECK
(Page 10)
3-5. CASSETTE LID ASSY
(Page 11)
3-6. DISPLAY BOARD
(Page 11)
3-10. TUNER BOARD
(Page 13)
3-7. CD BLOCK ASSY
(Page 12)
3-8. CD/MP3 BOARD
(Page 12)
3-9. OPTICAL PICK-UP
(Page 13)
3-13. M301, BELT
(Page 15)
3-11. POWER TRANS BOARD
(Page 14)
3-12. HRP301, HE301,
PINCH ROLLER ARM ASSY
(Page 14)
8
Note : Follow the disassembly procedure in the numerical order given.
)
3-1. CABINET REAR ASSY
4
1
knob RTRY VOL
7
CN101
6
two
BVTP 3 x 25
(+
screws
CSD-MP100
2
)
3
two
screws
BVTP 3 x 10
(+
)
cover (BATT)
5
three
(+
BVTP 3 x 25
screws
)
3-2. CHASSIS CD ASSY
cabinet front assy
2
CN401
(flat type)
8
CNP1
MAIN board
5
chssis CD assy
9
cabinet rear assy
3
two
screws
BVTP 3 x 10
(+
4
1
CN604
MAIN board
9
CSD-MP100
)
)
3-3. MAIN BOARD, TAPE BOARD
qs
two
holders (PWB)
7
1
CN201
8
CN301
6
screw
(+
3
CN601
(flat type)
BVTP 3 x 10
qa
two
(+
4
CN603
(flat type)
)
5
CN602
(flat type)
0
Removal the solders.
screws
BVTP 2.6 x 10
2
CN302
9
(+
qf
)
two
screws
BVTP 2.6 x 10
MAIN board
3-4. TAPE MECHANISM DECK
cabinet front assy
qd
TAPE board
3
two
(+
BVTP 2.6 x 10
screws
2
two
(+
BVTP 2.6 x 10
)
screws
10
1
4
tape mechanism deck
3-5. CASSETTE LID ASSY
)
)
2
damper
1
screw
(+
BVTP 2.6 x 10
CSD-MP100
4
3-6. DISPLAY BOARD
3
cassette lid assy
cassette spring T
cabinet front assy
2
three
(+
screws
KTP 3 x 10
)
1
three
(+
screws
KTP 3 x 10
3
DISPLAY board
11
CSD-MP100
3-7. CD BLOCK ASSY
4
two vibration proof rubbers
two claws
chassis CD assy
3
CD cover
two claws
3-8. CD/MP3 BOARD
2
(
two
screws
2.6 x 10
5
two vibration proof rubbers
)
6
CD block assy
1
two
(
2.6 x 10
CD mechanism
screws
)
12
4
connector
1
(+
screw
3
2
Remove the two solderings of motor.
BVTT 2 x 6
Remove the two solderings of motor.
5
CD/MP3 board
)
3-9. OPTICAL PICK-UP
)
3
screw
PWB tapping (M2)
(+
5
sled shaft
CSD-MP100
6
optical pick-up
claw
1
gear (A)
4
)
2
screw
PWB tapping (M2)
(+
)
3-10. TUNER BOARD
3
screw
(+
BVTP 3 x 10
holder (PWB TU)
)
5
6
TUNER board
2
telescopic antenna
1
(+
screw
B 2.6 x 10
4
two claws
13
CSD-MP100
y
3-11. POWER TRANS BOARD
4
transformer shield
2
CN103
1
CN102
6
POWER TRANS board
5
two
screws
3
four
BVTP 3 x 20
(+
screws
)
(screw (2.6))
3-12. HRP301, HE301, PINCH ROLLER ARM ASSY
5
screw
(azimuth)
7
azimuth spring
3
screw
(+B bind)
4
lug plate
6
HRP301 (REC/PB head)
1
pinch roller arm ass
14
2
HE301
(ERASE head)
claw
claw
3-13. M301, BELT
4
main belt
3
RF belt
2
1
screw (MB)
5
two
screws
(motor coller)
motor bracket
6
M301
(sub motor assy)
CSD-MP100
15
CSD-MP100
SECTION 4
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer close to the erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power
supply voltage (9V) unless otherwise noted.
Torque Measurement
Mode Torque meter Meter reading
2.95 – 6.86 mN • m
FWD CQ-102C (30 – 70 g • cm)
(0.42 – 0.97 oz • inch)
FWD
Back Tension
FF CQ-201B (more than 60 g • cm)
REW CQ-201B (more than 60 g • cm)
CQ-102C (1.5 – 5.5 g • cm)
0.15 – 0.53 mN • m
(0.021 – 0.076 oz • inch)
more than 5.88 mN • m
(more than 0.83 oz • inch)
more than 5.88 mN • m
(more than 0.83 oz • inch)
TAPE SECTION 0 dB = 0.775 V
• Standard Output Level
Output terminal SPEAKER L-CH (SP301)
load impedance 8 Ω
output signal level 0.25 V (–10 dB)
• Test T ape
Type Signal Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
Tape Speed Adjustment
Procedure:
Mode: playback
test tape
WS-48A
(3 kHz, 0 dB)
set
SPEAKER, L-CH (SP301)
Adjust so that the value on the digital frequency counter is
3,000 Hz.
digital frequency
counter
4
Ω
Tape Tension Measurement
Mode Tension meter Meter Reading
FWD CQ-403A
more than 100 g
(more than 3.53 oz)
Specification Value:
Digital frequency counter
2,940 to 3,060 Hz
Adjust so that the frequency at the beginning and that at the end of
tape winding are between 2,970 to 3,030 Hz.
Adjustment Location:
16
Tape speed adjustment
control inside motor
CSD-MP100
)
TUNER SECTION 0 dB = 1 µV
• FM Section
Setting:
BAND button: FM
FM RF signal
generator
TP (FM IN)
0.01
µ
F
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
• AM Section
Setting:
BAND button: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
• Connecting Level Meter (FM and AM)
Put the lead-wire
antenna close to
the set.
level meter
(range: 0.5–5 V ac
4
Ω
set
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7 MHz
FM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display 87.5 MHz 108 MHz
Reading on Digital voltmeter 1.3 ± 0.3 V 3.0 ± 0.2 V
Adjustment Part <confirmation> L2
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
87.5 MHz 108 MHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
AM FREQUENCY COVERAGE
ADJUSTMENT
530 kHz 1,710 kHz
Frequency Display
(US, CND) (US, CND)
531 kHz 1,611 kHz
(Except US, CND) (Except US, CND)
Reading on
Digital voltmeter
1.0 ± 0.05 V 5.3 ± 0.7 V
Adjustment Part L4 <confirmation>
set
SPEAKER, L-CH (SP301)
• Connecting Digital Voltmeter (FM and AM)
digital
voltmeter
100 kΩ
TP (VT)
•Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 CT3
620 kHz (US, CND) 1,400 kHz (US, CND)
621 kHz (Except US, CND) 1,404 kHz (Except US, CND)
Adjustment Location: See page 18.
17
CSD-MP100
Q701
3
R
7
IC
Adjustment Location:
– MAIN board (component side) –
TP (FM IN)
(CONDUCTOR SIDE)
T1
AM
IF
ADJUSTMENT
FM
ADJUSTMENT
T2
IF
T1
T2
L1
L3
CT1
IC1
CT1, L1
FM
TRACKING
ADJUSTMENT
L2
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
CT3, L3
AM
TRACKING
ADJUSTMENT
CT3
L4
TP (VT)
(CONDUCTOR SIDE)
L4
AM
FREQUENCY
COVERAGE
ADJUSTMENT
IC2
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between IC701 pin 4 and pin qa (or
TP (RF) and TP (VREF)).
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the N X (CD) button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
VOLT/DIV : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
RF level :
0.85 ± 0.2 Vp-p
Test Point:
— CD/MP3 board (side B) —
R724
C746
C717
C716
C718
R745
R723
C763
C742
C721
C719
C720
R755
C744
C743
C705
R708
R710
R709
C711
R711
R759
C712
TP
(RF)
C710
C707
R764
R726
C708
R727
R730
C713
TP
(VREF)
R729
C706
R725
R763
C709
C740
R728
C714
C701
C715
C
C761
R7
R73
C762
701
18
CSD-MP100
SECTION 6
DIAGRAMS
6-1. IC PIN DESCRIPTIONS
• IC1001 LC78684E (MP3 DECODER, CD-ROM DECODER, ANTI-SHOCK CONTROLLER) (CD/MP3 BOARD)
Pin No. Pin Name I/O Pin Description
1 LRSY I CD L/R clock input
2 ADDATA O Audio data output
3 ADBCK O Audio bit clock output
4 ADLRCK O Audio L/R clock output
5 C2FIN I CD C2 error flag input
6 VSS — Ground
7 CKIN I System clock (16.9344 MHz) input
8 VSS — Ground
9CKOUT O Clock (384Fs) output for external DF/DAC.
10 VSS — Ground
11 DVDD1 — Digital power supply pin for I/O.
12 PW I CD subcode data serial input
13 SBSY I CD subcode block synchronized signal input
14 SFSY I CD subcode frame synchronized signal input
15 SBCK O Serial clock output for CD subcode transfer. (Not used. (Open))
16 AVDD — Analog (PLL) power supply pin
17 VPRFR — VCO oscillation range setting pin
18 VCOC I VCO control voltage input
19 VPDO O VCO charge pump output
20 AVSS — Analog ground
21 DVDD2 — Power supply pin for internal logic.
22 VSS — Ground
23 to 30 MDATA0 to 7 I/O DRAM data bus 0 to 7
31 DVDD3 — Digital power supply pin for I/O.
32 VSS — Ground
33 to 40 MDATA8 to 15 I/O DRAM data bus 8 to 15
41 RASB O Row Address Strobe signal output (L: active)
42 WEB O Data Write Enable signal output (L: active)
43 CASLB O Column Address Strobe signal output (for lower byte, L: active)
44 CASUB O Column Address Strobe signal output (for upper byte, L: active)
45 OEB O Output enable signal output (L: active)
46 to 49 MADRS12 to 9 O DRAM address output 12 to 9 (Not used. (Open))
50 MADRS8 O DRAM address output 8
51 DVDD4 — Digital power supply pin for I/O.
52 VSS — Ground
53 to 60 MADRS7 to 0 O DRAM address output 7 to 0
61 DVDD5 — Power supply pin for internal logic.
62 VSS — Ground
63 STREQ I/O
64 STCK I/O MP3 data transfer clock input/DRAM data transfer clock output (Not used. (Open))
65 STDAT I/O MP3 data serial input/DRAM data serial output (Not used. (Open))
66 FSYNC O MP3 frame synchronized signal input (H: active) (Not used. (Open))
67 CRCF O
68 DVDD6 — Power supply pin for internal logic.
69 VSS — Ground
70 WOK I
MP3 data request flag output (H: active)/DRAM data request flag input (H: active)
(Not used. (Open))
CDROM-CRC flag output (H: active)/DRAM data output enable signal output
(H: active) (Not used. (Open))
DRAM write OK input (at CD-DA, H: active)/DRAM data request flag input
(at CD-ROM, H: active)
19
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