SONY CFD G700CP Service Manual
CFD-G70
SERVICE MANUAL
Ver. 1.4 2005.09
With SUPPLEMENT-1
US Model
Canadian Model
E Model
Model Name Using CD Section CFD-S40CP
Similar Mechanism Tape Section CFD-S40CP
CD Mechanism Type KSM-213CDP
Optical Pick-up Type KSS-213C
Tape Transport Mechanism Type MF-V5-117
AUDIO POWER SPECIFICATIONS (US Model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
Main speaker with 3.2-ohm loads, both channels driven from
1,000 - 10,000 Hz; rated 3 W per channel-minimum RMS power,
with no more than 10 % total harmonic distortion in AC operation.
Subwoofer with 4-ohm loads, driven at 50 - 150 Hz; rated 6 W
minimum RMS power, with no more than 10 % total harmonic
distortion in AC operation.
GAME Xpand with 12-ohm loads, driven at 3,000 - 10,000 Hz;
rated 1 W per channel minimum 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: 87.6 - 108 MHz
AM: 530 - 1,710 kHz
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): 70 - 13,000 Hz
General
Speakers
Main speaker: 10 cm (4 in.) dia., 3.2 Ω, cone type (2)
Subwoofer: 8 cm (3 1 ⁄4 in.) dia., 4 Ω, cone type (1)
GAME Xpand: 5 cm (2 in.) dia., 12 Ω, cone type (2)
Inputs
LINE IN jack (stereo minijack): sensitivity 436 mV
Outputs
Headphones jack (stereo minijack): for 16 - 68 Ω
impedance headphones
– Continued on page 2 –
CD RADIO CASSETTE-CORDER
9-873-132-15
2005I02-1
© 2005.09
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
CFD-G70
Power output
Main speaker: 4 W + 4W (at 3.2 Ω, 10 % harmonic
distortion in DC operation)
Subwoofer: 12 W (at 4 Ω, 10 % harmonic distortion in
DC operation)
GAME Xpand: 1.2 W + 1.2 W (at 12 Ω, 10 % harmonic
distortion in DC operation)
Power requirements
For CD radio cassette-corder:
120 V AC, 60 Hz
12 V DC, 8 size D (R20) batteries
For remote control:
3 V DC, 2 size AA (R6) batteries
Power consumption
AC 35 W
Battery life
For CD radio cassette-corder:
FM recording
Sony R20P: approx. 8 h
Sony alkaline LR20: approx. 18 h
Tape playback
Sony R20P: approx. 1.5 h
Sony alkaline LR20: approx. 6 h
CD playback
Sony R20P: approx. 1 h
Sony alkaline LR20: approx. 4 h
Dimensions
Approx. 530 × 193 × 345 mm (w/h/d)
(20 7 ⁄8 × 7 5 ⁄8 × 13 5 ⁄8 inches) (incl. projecting parts)
Mass
Approx. 7 kg (15 lb. 5 oz) (incl. batteries)
Supplied accessories
AC power cord (1)
Remote control (1)
AV connecting cord (1)
Audio connecting cord (1)
Design and specifications are subject to change without
notice.
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.
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 PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
TABLE OF CONTENTS
Specifications ............................................................................... 1
1. SERVICING NOTES ...................................................... 3
2. GENERAL
Location and Function of Controls ....................................... 5
3. DISASSEMBLY
3-1. Cabinet (Front) ASSY, Cabinet (Rear) ASSY ............. 6
3-2. Control-1 Board, Control-2 Board .............................. 7
3-3. Headphone Board ........................................................ 7
3-4. Cabinet (Top) ASSY .................................................... 8
3-5. LCD Board .................................................................. 8
3-6. AC Inlet Board, Power Board, VOL SEL Board ......... 9
3-7. Tuner Board ................................................................. 9
3-8. BATT Board, BATT COM Board .............................. 10
3-9. Main Board ................................................................ 10
3-10. CD Board, TC Board, Optical Pick-up Block,
Mechanism Deck ....................................................... 11
3-11. M321 (Capstan/Reel Motor), Belt,
HRP301 Head, Magnetic (Record/Playback),
HE301 Head (Erase) .................................................. 11
3-12. Optical pick-up (KSS-213C) ..................................... 12
4. ADJUSTMENTS
4-1. Mechanical Adjustments............................................ 13
4-2. Electrical Adjustments ............................................... 13
5. DIAGRAMS
5-1. Explanation of IC Terminals ...................................... 17
5-2. Block Diagram – Tuner/TC Section – ....................... 19
5-3. Block Diagram – Main Section – .............................. 20
5-4. Block Diagram – CD Section – ................................. 21
5-5. Printed Wiring Board – Tuner Section – ................... 22
5-6. Schematic Diagram – Tuner Section – ...................... 23
5-7. Printed Wiring Board – CD Section – ....................... 24
5-8. Schematic Diagram – CD Section – .......................... 25
5-9. Printed Wiring Board – TC Section – ........................ 26
5-10. Schematic Diagram – TC Section – .......................... 26
5-11. Printed Wiring Board – Main Section – .................... 27
5-12. Schematic Diagram – Main Section (1/2) – .............. 28
5-13. Schematic Diagram – Main Section (2/2) – .............. 29
5-14. Printed Wiring Board – Control Section – ................ 30
5-15. Schematic Diagram – Control Section – ................... 31
5-16. Printed Wiring Board – Power Supply Section – ...... 32
5-17. Schematic Diagram – Power Supply Section – ......... 33
6. EXPLODED VIEWS
6-1. Cabinet (Front) Assy.................................................. 38
6-2. Cabinet (Rear) Assy................................................... 39
6-3. Cabinet Top Assy ....................................................... 40
6-4. Mechanism Deck Section (1) .................................... 41
6-5. Mechanism Deck Section (2) .................................... 42
6-6. Optical Pick-up Block Section .................................. 43
7. ELECTRICAL PARTS LIST...................................... 44
ATTENTION AU COMPOSANT AYANT RAPPORT
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES 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.
À LA SÉCURITÉ!!
2
SECTION 1
SERVICING NOTES
CFD-G70
SAFETY CHECK-OUT (US model)
After correcting the original service problem, perform the
following safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage. Check
leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
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
pick-up block. Therefore, when checking the laser diode
emission, observe more than 30 cm away from the objective
lens.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
• Code number of Chuck Plate Jig : X-4918-255-1
To Exposed Metal
Parts on Set
0.15
µ
F
Ω
1.5k
Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Press CD open knob.
2. Open the lid for CD.
3. Push on SWITCH (S801) as following figure.
4. Confirm the laser diode emission while observing the
objecting lens. When there is no emission, Auto Power
Control circuit or Optical Pick-up is broken.
Objective lens moves up and down once for the focus
search.
Insert a precision
screw driver and push
SWITCH (S801)
3
CFD-G70
Y
• Service Position
Note: For removal, a screwdriver with the long shaft 25cm or more is required.
Repair without removing Headphone board.
Cabinet (front) ASS
Cabinet (rear) ASSY
Cabinet top ASSY
Main board
Tuner board
4
LOCATION AND FUNCTION OF CONTROLS
wd
ws
wa
w;
SECTION 2
GENERAL
1 623 45 7
CFD-G70
This section is extracted from
instruction manual.
8
9
0
qa
1 Tape operation buttons
REC z
PLAY N
REW m
FF M
STOP/EJECT x/Z
PAUSE X
2 PRESET – button
3 PRESET + button
4 CD u button
5 CD x button
6 VOLUME –/+ button
7 Z PUSH OPEN/CLOSE
8 GAME/LINE button
9 GAME Xpand button
0 MODE button
qkql
qh
qg
qs
qf
qdqj
qa SOUND button
qs RADIO BAND/AUTO PRESET button
qd POWER DRIVE WOOFER button
qf CD: AMS > button
Radio: TUNE + button
qg CD: AMS . button
Radio: TUNE – button
qh Remote sensor
qj Display window
qk GAME/LINE IN jack
ql i jack
w; OPR/BATT indicator
wa DISPLAY ENT/MEMORY button
ws POWER button
wd SLEEP button
5
CFD-G70
DISASSEMBLY
z
The equipment can be removed using the following procedure.
SECTION 3
Cabinet (front) ASSY
Control-1 board, Control-2 board Headphone board
Set
Cabinet (rear) ASSY Cabinet top ASSY LCD board
AC inlet board, Power board,
VOL SEL board (E4 model)
Tuner board
Main board
• Abbreviation
E4 : 110-120V/220-240V AC changeable
Note : Follow the disassembly procedure in the numerical order given.
3-1. CABINET (FRONT) ASSY, CABINET (REAR) ASSY
7
Connectors
(from Headphone board CN391, 394, 396)
BATT board,
BATT COM board
CD board, TC board,
Optical pick-up block,
Mechanism deck
M321 (Capstan/Reel motor),
Belt, HRP301 Head, magnetic,
HE301 Head (Erase)
Optical pick-up (KSS-213C)
Cabinet (front) ASSY
6
Flexible cable
(from Main board CNP805)
8
4
5
Screw
(+BVTP 3
2
×
3
Screws
Screw
(+BVTP 3
10)
1
(+BVTP 3
×
20)
Cabinet (rear) ASSY
Lid, battery case
×
14)
3
Screws
2
Screw
(+BVTP 3
3
Screws
(+BVTP 3
(+BVTP 3
×
×
×
20)
14)
14)
6
3-2. CONTROL-1 BOARD, CONTROL-2 BOARD
)
)
7
Button (top) sub ASSY
6
Button (volume)
6
Button (power)
8
CFD-G70
Control-2 board
3-3. HEADPHONE BOARD
5
4
Screws
(+BVTP 2.6
2
Button (front)
×
8)
4
Screws (+BVTP 2.6 × 8)
3
Control-1 board
1
Screws
(+BVTP 2.6
×
8
4
1
Connector
(from Headphone board CNP392)
1
Connector
(from Headphone board CNP393)
1
Connector
(from Headphone board CNP395
3
Jack hold board
Headphone board
2
Screw
(+PWH 2
×
6)
7
CFD-G70
)
3-4. CABINET TOP ASSY
1
Connector
(from Power board CNP903)
2
Screws (+BVTP 3 × 10)
4
Cabinet top ASSY
1
3
Connector
(from Tuner board CNP1
3-5. LCD BOARD
LCD board
1
Screws
(+BVTP 3 × 10)
3
2
Flexible cable
(from Main board CNP803)
8
3-6. AC INLET BOARD, POWER BOARD, VOL SEL BOARD (E4 model)
1
Connector
(from Power board
CNP902)
3
Screws
(+BVTP 3
5
Screw
(+BVTP 3
×
×
10)
10)
5
Screw
(+BVTP 3
AC inlet board
×
10)
CFD-G70
Power board
3-7. TUNER BOARD
6
E4 Model
VOL SEL board
7
Screw
(+BVTP 3
4
Chassis (trans)
×
10)
2
Screws
(+BVTP 3
×
10)
Chassis (TU)
1
Screw
(+BVTP 3
×
10)
4
2
3
Screws
(+BVTP 3
Tuner board
×
10)
9
CFD-G70
)
)
3-8. BATT BOARD, BATT COM BOARD
3
Claw
4
BATT board
2
1
Screw
(+WH 3
×
BATT COM board
8
3-9. MAIN BOARD
2
Flexible cable
(from Main board CNP801)
Main board
1
Screw
(+BVTP 3
5
×
10)
1
Screws
(+BVTP 3
4
Flexible cable
(from Main board CNP802
×
10)
10
3
Connector
(from Main board CNP322)
3-10. CD BOARD, TC BOARD, OPTICAL PICK-UP BLOCK, MECHANISM DECK
)
3
1
Screws
(+PWH 2.6
8
Screw (+PTT 2 × 6)
4
Flexible cable
(from CD board CNP701)
×
10)
6
Screws
(+BVTP 3
×
10)
Screw (+P 2 × 6)
5
CD board
1
Screws
(+PWH 2.6
Optical pick up block
×
CFD-G70
10)
0
TC board
9
Unsolder lead wires
Mechanism deck
3-11. M321 (CAPSTAN/REEL MOTOR), BELT,
“HRP301 HEAD, MAGNETIC (RECORD/PLAYBACK)”
HE301 HEAD (ERASE)
5
HRP301
Head, magnetic (record/playback)
2
7
6
HE301
Head (erase)
3
Belt
1
Screws
(+B 2.6 × 5)
Mechanism deck
2
4
M321
(Capstan/reel motor
11
CFD-G70
)
3-12. OPTICAL PIC-UP (KSS-213C)
Cover, CD
Claws
Optical pick-up (KSS-213C)
4
Shaft, sled
Claw
1
Claw
3
Bend the stopper
5
Gear
Claw
2
Chassis ASSY, motor (MB) (spindle
12
SECTION 4
y
ADJUSTMENTS
CFD-G70
4-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan
2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer 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 (12V) unless otherwise noted.
Torque Measurement
Torque Torque Meter Meter Reading
1.77 – 5.88 mN•m
Forward CQ-102C (18 – 60 g•cm)
(0.25 – 0.83 oz•inch)
Forward
Back Tension
Fast Forward CQ-201B (45 – 95 g•cm)
Rewind CQ-201B (45 – 95 g•cm)
CQ-102C (1.0 – 5.0 g•cm)
0.1 – 0.49 mN•m
(0.014 – 0.069 oz•inch)
4.42 – 9.31 mN•m
(0.62 – 1.32 oz•inch)
4.42 – 9.31 mN•m
(0.62 – 1.32 oz•inch)
4-2. ELECTRICAL ADJUSTMENTS
TAPE RECORDER SECTION
Standard Output Level
Output terminal HP OUT
load impedance 32 Ω
output signal level 0.25V (–10dB)
Test Tape
Type Signal Used for
WS-48A 3kHz, 0dB Tape Speed Adjustment
Tape Speed Adjustment
Procedure :
Mode : Playback
test tape
WS-48A
(3kHz, 0dB)
set
Adjustment so than the value on the digital frequency counter is
3,000 Hz.
Adjustment Value : 3,000Hz
Standard Value : 2,940 - 3,060Hz
32
J391 (
0dB = 0.775V
digital frequenc
counter
Ω
i
jack)
Tape Tension Measurement
Torque Meter Meter Reading
CQ-403A
more than 60g
(more than 2.12 oz)
Frequency difference between the beginning and the end of the tape
should be within 1.5% (45Hz).
Adjustment Location : Mechanism deck
Tape speed adjustment
control inside motor
13
CFD-G70
c
)
TUNER SECTION
AM Section
Function switch : AM
Volume : MIN
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM Section
Function switch : FM
Volume : MIN
FM RF signal
generator
33.75kHz frequency deviation by
1kHz signal.
Output level : as low as possible
0dB = 1 µV
Put the lead-wire
antenna close to
the set.
0.01µF
telescopi
antenna
terminal
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 450 kHz
( ): E4
AM FREQUENCY COVERAGE CHECK
Frequency Display
Reading on Digital voltmeter
Adjustment Part < L 4 > <confirmation>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 CT3
620 kHz 1,400 kHz
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 ± 0.4 V 3.0 ± 0.3 V
Adjustment Part <confirmation> L2
530 kHz 1,710 kHz
(530 kHz) (1,610 kHz)
1.0 ± 0.1 V 5.3 ± 0.8V
(1.0 ± 0.1 V) (4.8 ± 0.8V)
• Connecting Level Meter (FM and AM)
level meter
(range: 0.5–5 V ac
32 Ω
set
J391 ( i jack)
• 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.
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
87.5 MHz 108 MHz
• Abbreviation
E4 : 110-120V/220-240V AC changeable.
Adjustment Location : Main board (See page 16)
14
CFD-G70
)
8
8
C70
FB70
7
W
7
oscilloscope
(AC range)
TP (RF)
(GND)
CD BOARD (Conductor side)
TP (RF)
CD SECTION
Perform all CD section check and all adjustments in the test mode.
How to put the set into CD test mode
1. Press the POWER button turn the set ON.
2. Press the FUNCTION button to select CD.
3. Set Tset mode by momentarlly shorting both side of TEST A.
4. Press the x button two times. The set is into CD test mode.
(88 is displayed)
5. Turn the power off to release test mode.
(Conductor side)
S402
MODE
R401
S404
SOUND
R402
R403
R404
R407
KH402
(TEST A)
CONTROL-1 BOARD
S401
GAME/LINE
D401
GAME Xpand
S403
GAME Xpand
When observing the eye pattern, set the oscilloscope for AC range
and raise certical sensitivity.
C
R707
Q701
R712
C72
C701
C751
JW714
C729
JW723
C702
R728
R727
JW712
JW713
JW725
C704
R711
JW711
R726
C730
R730
R708
R710
R709
J
C731
R702
R703
R705
R701
R706
R729
C705
R704
C747
C703
C743
JW726
JW708
C744
C734
C736
C74
C742
JC703
JW707
C707
JW709
IC701
C708
C717
R
JW710
C733
C750
C706
C732
1-6
Focus Bias Check
1. Connect the oscilloscope between TP (RF) and GND on CD
board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01) (CD)
3. Press the u button two times (LPC ON).
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.
5. Press the u button.(LPC OFF)
6. Perform confirmation in step 4 again.
• RF Signal Reference Waveform (eye pattern)
VOLT/DIV : 200mV
TIME/DIV : 500 nS
TEST mode : momentarily short
RF level
0.83 – 0.87 Vp-p (LPC ON)
0.82 – 0.88 Vp-p (LPC OFF
15
CFD-G70
t
Adjustment Location :
TUNER BOARD
(Component side)
L1: FM Tracking Adjustment
CT1: FM Tracking Adjustment
L3: AM Tracking Adjustment
CNP1
T2: FM IF Adjustment
T1: AM IF Adjustment
CT3: AM Tracking Adjustmen
T4: AM Frequency Coverage Adjustment
L2: FM Frequency Coverage Adjustment
16
SECTION 5
DIAGRAMS
5-1. EXPLANATION OF IC TERMINALS
IC802 CXP83620-031Q SYSTEM CONTROL
Pin No. Pin name I/O Description
1 WRQ I CD subcorde Q signal input
2 RMC I Remote control signal input
3 R-MUTE O Radio mute signal output
4 ADJ O DC 1.7 V output for beep signal (Not used)
5 C-FSEQ I CD FSEQ signal input
6 C-CE O CD chip select signal output
7 C-CL O CD clock signal output
8 C-DO I CD serial data signal input
9 C-DI O CD serial data signal output
10 C-DRF I CD DRF signal input
11 C-RES O CD reset signal output
12 NC — Not used
13 SUR ON/OFF O Surround ON/OFF signal output
14 R-COUNT I Radio count signal input
15 R-CLOCK O Radio control clock signal output
16 R-DATA O Radio control data signal output
17 R-CE O Radio latch signal output
18 V-LATCH O Data latch signal output to LC75342 (VOL IC)
19 V-DATA O Data signal output to LC75342 (VOL IC)
20 V-CLOCK O Clock signal output to LC75342 (VOL IC)
21 P-CON O Power control signal output
22 REG CHK I Regulator voltage check signal input
23 REC I Tape recording function signal input
24 SDA I/O EEPROM serial data in/out
25 – 27 KEY-1 – 3 I Key input terminal of A/D port
28 LIGHT CONT O Woofer monitor LED ON/OFF signal output
29 MODE CHECK I Reading specification and MEGA BASS signal input terminal (A/D port)
30 RST I System reset signal input
31 EXTAL I Crystal oscillator terminal (4.0MHz)
32 XTAL O Crystal oscillator terminal (4.0MHz)
33 VSS — Ground terminal
34 VL O LCD bias control signal output
35 VLC3 — LCD bias voltage terminal
36 VLC2 — LCD bias voltage terminal
37 VLC1 — LCD bias voltage terminal
38 – 41 COM0 – 3 O LCD common signal output
42 – 59 SEG0 – 17 O LCD segment signal output
60, 61 NC — Not used
62 INIT O Initial signal output
63, 64 WOOFER2, 1 O Woofer function signal output
65 VM O Battery check signal output
66 VH O TAPE deck motor control signal output
67, 68 ISS1, 2 O ISS select signal output
69 TAPE O TAPE function signal output
70 RADIO O Radio function signal output
CFD-G70
17
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