MX-G70
MX-G70
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
Area Suffix
MX-G70
A
UP
US
UW
UY
Australia
Korea
Singapore
Brazil,Mexico,Peru
Argentina
STANDBY/ON
PLAY & EXCHANGE
STANDBY
CD-R/RW PLAYBACK
MX-G70
SP-MXG70
CA-MXG70
SP-MXG70
(No MIC jack and MIC LEVEL volume for A,UP,UY ver.)
Contents
Safety precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method
1-2
1-3
1-4
1-5
1-25
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
This service manual is printed on 100% recycled paper.
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
1-29
1-30
1-30
1-31~49
No.20986
Jun. 2001
MX-G70
1. This design of this product contains special hardware and many circuits and components specially for safety
purposes. For continued protection, no changes should be made to the original design unless authorized in
writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services
should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product
should not be made. Any design alterations or additions will void the manufacturer's warranty and will further
relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These
characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily
be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in the Parts List of Service Manual. Electrical
components having such features are identified by shading on the schematics and by ( ) on the Parts List in
the Service Manual. The use of a substitute replacement which does not have the same safety characteristics
as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or
other hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be
separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of
electric shock and fire hazard. When service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been returned to normal, after re-assembling.
5. Leakage current check (Electrical shock hazard testing)
After re-assembling the product, always perform an isolation check on the exposed metal parts of the product
(antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor
between an exposed metal part and a known good earth ground.
AC VOLTMETER
Measure the AC voltage across the resistor with the AC
(Having 1000
ohms/volts,
voltmeter.
or more sensitivity)
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
0.15 F AC TYPE
the chassis, and measure the AC voltage across the resistor.
Place this
Now, reverse the plug in the AC outlet and repeat each
probe on
measurement. Voltage measured any must not exceed 0.75 V
each exposed
AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).
1500 10W
metal part.
Good earth ground
1. This equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.
!
Burrs formed during molding may
be left over on some parts of the
chassis. Therefore, pay attention to
such burrs in the case of
preforming repair of this system.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor (
), diode (
) and ICP (
) or identified by the " "
mark nearby are critical for safety.
When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.
(Except the J&C version)
1-2
MX-G70
Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
the complete Laser Unit if it malfunctions.
4.CAUTION : The compact disc player uses invisible laser
radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
! CAUTION Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
dangerous to defeat the safety switches.
VARNING : Osynlig laserstrålning är denna del är öppnad
ADVARSEL : Usynlig laserstråling ved åbning , når
och spårren är urkopplad. Betrakta ej strålen.
VARO
sikkerhedsafbrydere er ude af funktion. Undgå
: Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Älä katso
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
säteeseen.
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
POSITION OF LABELS
CLASS 1
LASER PRODUCT
WARNING LABEL
DANGER : Invisibie laser radiation
VARO : Avattaessa ja suojalukitus
VARNING : Osynlig laserstrålning
when open and interlock or
ohitettaessa olet alttiina
är denna del är öppnad och spårren ved åbning , når
defeated.
näkymättömälle lasersäteilylle.Älä
är
sikkerhedsafbrydere er ude af
urkopplad. Betrakta ej strålen.
funktion. Undgå udsættelse for
(s)
stråling.
AVOID DIRECT EXPOSURE TO
BEAM
(e)
katso säteeseen.
(d)
ADVARSEL :Usynlig laserstråling
(f)
1-3
MX-G70
Preventing static electricity
1. Grounding to prevent damage by static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
2. About the earth processing for the destruction prevention by static electricity
In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of
the work environment.
Be careful to use proper grounding in the area where repairs are being performed.
2-1 Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over
it before placing the traverse unit (optical pickup) on it.
2-2 Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
3. Handling the optical pickup
1. In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.
4. Handling the traverse unit (optical pickup)
1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific
details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse
unit. Be careful not to take too long a time when attaching it to the connector.
3. Handle the flexible cable carefully as it may break when subjected to strong force.
4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the CD traverse mechanism.
1. Remove the disk stopper and T. bracket on the CD changer mechanism
assembly.
2. Disconnect the harness from connector on the CD motor board.
3. CD traverse unit is put up as shown in Fig.1.
4. Solder is put up before the card wire is removed from connector CN601
on the CD servo control board as shown in Fig. 2.
(When the wire is removed without putting up solder, the CD pick-up
assembly might destroy.)
5. Please remove solder after connecting the card wire with CN601 when
you install picking up in the substrate.
1-4
CD changer
mechanism
assembly
CD traverse
unit
Fig.1
Flexible cable
Soldering
Fig.2
MX-G70
Disassembly method
A
Metal cover
<Main body>
Removing the metal cover
(See Fig.1 to 3)
1. Remove the six screws A on the back of the body.
2. Remove the two screws B
body.
on both sides of the
3. Remove the metal cover from the body by lifting the
rear part of the cover.
A
A
CAUTION: Do not break the front panel tab fitted to
the metal cover.
Fig.1
Metal cover
B
Fig.2
Metal cover
Fig.3
B
1-5
MX-G70
Front panel assembly
Removing the CD changer mechanism
assembly
(See Fig.4 to 6)
Prior to performing the following procedure, remove
the metal cover.
C
C
1. Disconnect the card wire from connector CN561 on
the Main board.
2. Remove the two screws C on the upper side of the
body and the two screws D on the back of the rear
panel.
3. Remove the plastic rivet attaching the main board.
4. Remove the fan connector CN705.
5. Pull both the rear panel and the front panel assembly
to the outside, then remove the CD changer
mechanism assembly by lifting the rear part of the
assembly.
CD changer
mechanism assembly
Main board
CN561
Fig.4
CD changer mechanism assembly
Rear panel
Rear panel
Main board
CN561
D
Plastic rivet
CAUTION: To prevent damage to the CD fitting, be
sure to pull both the rear panel and the
front panel assembly enough to remove
the CD changer mechanism assembly.
Front panel assembly
Fig.5
Amplifier board
CN703
Tie band
Main board
CN870
CN871
CN705
CN315
Removing the front panel assembly
(See Fig.6 to 10)
Prior to performing the following procedure, remove
the metal cover and CD changer mechanism
assembly.
1. Disconnect the card wires from connector CN870,
CN871 and CN315 on the main board respectively.
2. Remove the tie band and disconnect the wire from
connector CN703 on the amplifier board.
Transformer board
CN220
Fig.6
Front panel
assembly
3. Disconnect the wire from connector CN220 on the
transformer board.
Front panel assembly
Main board
Fig.7
1-6
MX-G70
4. Remove the four screws E
body.
on the bottom of the
E
Front panel assembly
5. Release the two joints a on the lower right and left
sides of the body using a screwdriver, and remove
the front panel assembly toward the front.
(Bottom)
Fig.8
Joint a
Front panel assembly
Fig.9
Joint a
Front panel assembly
Fig.10
1-7
MX-G70
Removing the tuner board
(See Fig.11 and 12)
Plastic rivet
Tuner board
CN1
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
Rear panel
1. Disconnect the card wire from connector CN1 on the
tuner board on the right side of the body.
2. Remove the plastic rivet fixing the tuner board.
3. Remove the two screws F on the back of the body.
Fig.11
G
Rear panel
F
Removing the rear cover / rear panel
(See Fig.12 to 15)
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
Joint b
Joint b
1. Remove the screw G attaching the rear cover on the
back of the body.
2. Push each tab of the four joints b in the direction of
the arrow and release.
Rear cover
Fig.12
Rear panel
3. Remove the twelve screws F and two screws F'
(Only US,UW ver.) attaching the rear panel.
4. Release the joints c on each lower side of the rear
panel using a screwdriver and remove the rear panel
backward.
F
F
Note : Remove the tuner board in case of necessity.
(Refer to Fig.16)
F'
F
(Only US,UW ver. )
F
Fig.13
Joint c
Rear panel
Fig.15
1-8
Rear panel
Joint c
Fig.14
MX-G70
Removing the main board
(See Fig.16 and 17)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly, the rear panel and the tuner board.
Main board
CN870
Front panel assembly
CN871
CN315
Amplifier board
CN704,CN706
1. Disconnect the card wires from connector CN870,
CN871 and CN315 on the main board.
2. Disconnect the flat wires from connector CN704 and
CN706 on the amplifier board.
3. Remove the screw H attaching the main board on
the right side of the body.
4. Disconnect connector CN211 and CN212 on the
main board from the regulator board.
Fig.16
Front panel assembly
Plastic rivet
Main board
Regulator board
H
CN211
CN212
Fig.17
Removing the speaker terminal board
(See Fig.18)
Speaker terminal board
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
REFERENCE: It is not necessary to remove the main
board.
1. Disconnect connector CN217 on the speaker
terminal board from the regulator board.
Regulator board
Fig.18
CN217
1-9
MX-G70
Removing the power supply board (On
the voltage selector). (only US,UW
ver.)
(See Fig. 19-1)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Power supply
board
CN250
1. Disconnect the wires from connector CN218, CN219
and CN250 on the power supply board respectively.
2. Remove the tie band attaching the wire to the power
supply board.
CN218
CN219
CN213
Tie band
Fig.19-1
3. Move the power cord stopper upward and pull out it
from the base chassis.
4. Disconnect connector CN213 on the power supply
board from the regulator board.
Removing the power supply board (On
the ECO Circuit). (Only A ver.)
(See Fig.19-2)
Voltage board
Power supply
board
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Power
cord
1. Disconnect the wire from connector CN250 on the
power supply board.
Power cord
stopper
2. Move the power cord stopper upward and pull out it
from the base chassis.
3. Disconnect the wire from connector CN218 on the
power supply board.
4. Disconnect connector CN213 on the power supply
board from the regulator board.
1-10
Base chassis
CN213
CN250
CN218
Fig.19-2
MX-G70
Removing the amplifier board / voltage
board / heat sink
(See Fig.20 and 21)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Amplifier board
CN704
CN706
Voltage
board
Tie band
CN703
1. Remove the two tie band attaching the wire to the Regulator
board
amplifier board and the voltage board.
CN215
2. Disconnect the wires from connector CN703, CN704
and CN706 on the amplifier board respectively.
3. Disconnect connector CN215 on the amplifier board
and CN216 on the voltage board from the regulator
board (The heat sink and heat sink bracket will be
detached at once).
CN216
Fig.20
J
Heat sink
4. Pull out the upper and lower heat sink brackets from
the heat sink respectively.
5. Remove the four screws I
board to the heat sink.
Voltage board
attaching the amplifier
Amplifier board
6. Remove the two screws J, the board bracket and
the voltage board.
Removing
assembly
the
power
transformer
(See Fig.22)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel and power supply
board.
1. Disconnect the wire from connector CN204 on the
regulator board.
I
Fig.21
K
Regulator board
CN204
2. Remove the plastic holder.
Transformer
board
3. Remove the four screws K attaching the transformer
assembly.
Removing the regulator board
(See Fig.22)
Prior to performing the following procedure, remove
metal cover, CD changer mechanism assembly, rear
panel, tuner board, main board, amplifier board,
voltage board, power supply board and speaker
board.
Power
transformer
assembly
Plastic
holder
K
L
Regulator board
Fig.22
1. Disconnect the wire from connector CN204 on the
regulator board.
2. Remove the two screws L attaching the regulator
board.
1-11
MX-G70
<Front panel assembly>
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the front panel assembly.
Removing
assembly
the
cassette
mechanism
(See Fig.23)
1. Disconnect the card wire from connector CN306 on
the head amplifier & mechanism control board.
2. Remove the four screws M and three screws M'
attaching the cassette mechanism assembly.
Head amplifier
& Mechanism control board
CN306
M
M
M
M'
M'
M'
Cassette mechanism
assembly
Fig.23
N
Removing the display system control
board
(See Fig.24 to 26)
1. Remove the five screws N attaching the stay bracket.
2. Disconnect the card wires from connector CN316 and
CN880 on the display system control board.
3. Remove the seven screws O attaching the display
system control board.
Display system control board
4. If necessary, disconnect the wire from connector
CN911 on the front side of the display system control
board and unsolder FW915.
Fig.24
O
CN316
If necessary, remove the CD play board. (Fig. 29)
O
Removing the CD play board
(See Fig.26 and 27)
O
1. Remove the three screws P attaching the CD eject FW915
(Soldering)
board.
2. If necessary, unsolder FW915 on the CD eject
board.
CD play board
FW915
(Soldering)
P
Stay bracket
O
O
Display system control board
CN880
Fig.25
CN911
CD play board
FW915
P
FW915
Display system control board
Fig.27
1-12
Fig.26
MX-G70
Preset / tuning switch board
Removing the preset / tuning switch
board
(See Fig.28 and 29)
Prior to performing the following procedure, remove
the display system control board.
Q
1. Pull out the preset knob on the front panel.
2. Remove the five screws Q attaching the preset /
tuning switch board.
Q
Fig.28
Removing the operation switch board
(See Fig.29 and 30)
PRESET knob
SOUND MODE knob
Prior to performing the following procedure, remove
the display system control board and the preset /
tuning switch board.
SUB WOOFER
level knob
1. Pull out the volume knob on the front panel and
remove the nut. Pull out the sound mode knob and
the sub woofer level knob mic level knob toward the
front. (Only US,UW ver.)
Attention: A,UP,UY ver. have no mic volume knob
2. Remove the Thirteen screws R
operation switch board.
Nut
attaching the
MIC LEVEL
volume knob
3. Release the wire clamp.
4. Remove the screw R' attaching the earth terminal
extending from the switch board.
(Only US,UW
ver.)
VOLUME knob
Fig.29
Release each tab of the seven joints g retaining the
operation switch board.
R
Joints g
R
Operation
switch board
Joint g
R
Joint g
Joint g
R
Wire clamp
Joints g
R
R R
R'
Fig.30
1-13
MX-G70
A
Removing the CD Servo control board
(See Fig.1)
1.Remove the metal cover.
2.Remove the CD changer mechanism assembly.
3.From bottom side the CD changer mechanism assembly,
remove the four screws A retaining the CD servo control
board.
4.Absorb the four soldered positions "a" of the right and
left motors with a soldering absorber.
5.Pull out the earth wire on the CD changer mechanism
assembly.
6.Disconnect the connector CN854 on the CD servo
control board.
7.Disconnect the card wire CN601 and the connector
CN801 on the CD servo control board.
a
a
CN854
A
CN651
CD servo control board
CN652
CN801
CN151
CN601
Removing the CD tray assembly
(See Fig.2~4)
1. Remove the front panel assembly.
2. Remove the CD changer mechanism assembly.
3. Remove the CD Servo control board.
4. Remove the screw B' retaining the lod stopper.
5. From the T.bracket section "b" and clamper base
section "c" , remove both of the edges fixing the
rod(See Fig.2 and 3).
6. Remove the screw B retaining the disc stopper
(See Fig.3).
7. Remove the three screws C retaining the T.bracket
(See Fig.3).
8. Remove the screw D retaining the clamper assembly
(See Fig.3).
9. From the left side face of the chassis assembly, remove
the one screw E retaining both of the return spring and
lock lever(See Fig. 4).
10. By removing the pawl at the section "d" fixing the return
spring, dismount the return spring(See Fig.4).
11. Remove the three lock levers(See Fig.4).
Earth
wire
A
Fig.1
A
Clamper base
b
Rod
c
T.Braket
Fig.2
Disc stopper
T.Braket
d
B
C
C
B'
a
Lod stopper
(C/J version only)
Return spring
C
D
b
Lock lever
Clamper ass'y
1-14
Fig.4
Fig.3
E
MX-G70
Stopper
11. Check whether the lifter unit stopper has been caught
into the hole at the section "e" of CD tray assembly as
shown in Fig.5.
12. Make sure that the driver unit elevator is positioned as
shown in Fig.6 from to the second or fifth hole on the
left side face of the CD changer mechanism assembly.
[Caution] In case the driver unit elevator is not at above
position, set the elevator to the position as
shown in Fig.7 by manually turning the pulley
gear as shown in Fig.8.
e
13. Manually turn the motor pulley in the clockwise
direction until the lifter unit stopper is lowered from the
section "e" of CD tray assembly(See Fig.8).
14. Pull out all of the three stages of CD tray assembly in
the arrow direction "f" until these stages stop
(See Fig.6).
15. At the position where the CD tray assembly has
stopped, pull out the CD tray assembly while pressing
the two pawls "g and g' " on the back side of CD tray
assembly(See Fig.9). In this case, it is easy to pull out
the assembly when it is pulled out first from the stage
CD tray assembly.
CD tray
assembly
Fig.5
Chassis assembly
f
CD tray assembly
Refer to Fig.7
Pawl
Fig.7
g
Drive unit of elevator
Fig.6
CD 3
CD 2
CD 1
CD tray assembly
Pulley gear
Motor pulley
Pawl
Fig.8
g , g'
Fig.9
1-15
MX-G70
Cams R1, R2 assembly
Removing the CD loading mechanism
assembly(See Fig.10)
1. While turning the cams R1 and R2 assembly in the
arrow direction "h" ,align the shaft "i" of the CD loading
mechanism assembly to the position shown in Fig.10.
2. Remove the four screws F retaining the CD loading
mechanism assembly.
Removing the CD traverse mechanism
(See Fig.11 and 12 )
Arrow
h
i
F
F
1. For dismounting only the CD traverse mechanism
without removing the CD loading mechanism assembly,
align the shaft "j" of the CD loading mechanism
assembly to the position shown Fig.11 while turning the
cam R1 and R2 assembly in the arrow direction "k" .
2. By raising the CD loading mechanism assembly in the
arrow direction "l", remove the assembly from the lifter
unit
F
F
Cam R1, R2 assembly
CD loading mechanism assembly
Fig.10
CD traverse mechanism
Arrow
k
j
Lifter unit
Arrow
l
Fig.11
Fig.12
CD Pickup unit
Removing the CD pick unit
(See Fig.13 )
1. Move the cam gear in the arrow direction "m" . Then,
the CD pickup unit will be moved in the arrow direction
"n" .
2. According to the above step, shift the CD pickup unit to
the center position.
3. While pressing the stopper retaining the shaft in the
arrow direction "o" , pull out the shaft in the arrow
direction "p".
4. After dismounting the shaft from the CD pickup unit,
remove the CD pickup unit
n
m
Shaft
Cam gear
Shaft
Shaft
p
o
Stopper
Stopper
Fig.13
1-16
CD loading
mechanism
MX-G70
Removing the try select switch board
(See Fig.14)
Chassis assembly
1. Remove the two screws G retaining the tray select
switch board.
2. Disconnect the tray select switch board from connector
CN804 on the CD servo control board.
Tray select
switch board
CN854
Removing the cam unit
(See Fig.15 ~17 )
1. Remove the CD loading mechanism assembly.
2. While turning the cam gear "q", align the Paul "r"
position of the drive unit to the notch position(Fig.16) on
the cam gear "q".
3. Pull out the drive unit and cylinder gear(See Fig.17).
4. While turning the cam gear "q", align the Paul "s"
position of the select lever to the notch position(Fig.18)
on the cam gear "q".
5. Remove the four screws H retaining the cam unit(cam
gear "q" and cams R1/R2 assembly)(See Fig.18).
CN851
CN804
G
Fig.14
Cam gear q
Drive unit
r
Fig.15
Drive unit
Cylinder gear
H
Cam gear q
Cams R1, R2 assembly
Cam unit
J
H
s
Fig.16
Select lever
Fig.17
1-17
MX-G70
Removing the actuator motor and belt
(See Fig.18~21)
Gear bracket
1. Remove the two screws I retaining the gear bracket
(See Fig.18).
2. While pressing the pawl "t" fixing the gear bracket in the
arrow direction, remove the gear bracket
(See Fig.18).
3. From the notch "u section" on the chassis assembly
fixing the edge of gear bracket, remove and take out the
gear bracket(See Fig. 19).
4. Remove the belts respectively from the right and left
actuator motor pulleys and pulley gears(See Fig. 18).
5. After turning over the chassis assembly, remove the
actuator motor while spreading the four pawls "v" fixing
the right and left actuator motors in the arrow
direction(See Fig. 20).
[Note] When the chassis assembly is turned over under
the conditions wherein the gear bracket and belt
have been removed, then the pulley gear as well
as the gear, etc. constituting the gear unit can
possibly be separated to pieces. In such a case,
assemble these parts by referring to the assembly
and configuration diagram in Fig. 21.
Pulley gear
Belt
Motor pulley
I
Pawl
t
Pulley gear Belt
Motor pulley
I
Fig.18
Actuator motor
Chassis assembly
u
v
Gear bracket
v
Fig.20
Fig.19
Assembly and Configuration Diagram
Pulley gear
Gear B
Pulley gear
Cylinder gear
Gear B
Gear C
Select gear
Gross gear L
Fig.21
1-18
Gross gear U
Gear C
MX-G70
Slit washer
Removing the cams R1/R2 assembly
and cam gear q(See Fig.22)
Cam R2
Slit washer
1. Remove the slit washer fixing the cams R1 and R2
assembly.
2. By removing the two pawls "w" fixing the cam R1,
separate R2 from R1.
3. Remove the slit washer fixing the cam gear "q".
4. Pull out the cam gear "q" from the C.G. base assembly.
Cam gear q
J
Pawl
Cam R1
Removing the C.G. base assembly
(See Fig.22 and 23)
w
Pawl
w
Remove the three screws J retaining the C.G. base
assembly.
[Caution] To reassemble the cylinder gear, etc.with the
cam unit (cam gear and cans R1/R2 assembly),
gear unit and drive unit, align the position of the
pawl "x" on the drive unit to that of the notch on
the cam gear "q". Then, make sure that the
gear unit is engaged by turning the cam gear
"q" (See Fig. 23).
Cam switch board
C.G. base assembly
Fig.22
Cam gear q
Cam R1, R2 assembly
Notch
Pawl
x
Gear unit
Cylinder
gear
Drive unit
Gear bracket
Fig.23
1-19
MX-G70
< Cassette mechanism section >
Cassette mechanism
Removing the playback,recording and eraser
heads (See Fig.1~3)
1. While shifting the trigger arms seen on the right
side of the head mount in the arrow direction,turn
the flywheel R in counterclockwise direction until
the head mount has gone out with a click
(See Fig. 1).
2. When the flywheel R is rotated in counterclockwise
direction, the playback / recording & eraser head will
be turned in counterclockwise direction from the
position in Fig.2 to that in Fig.3.
3. At this position, disconnect the flexible P.C.board
(outgoing from the playback head) from the
connector CN301 on the head amp. and mechanism
control P.C. board.
4. Remove the flexible P.C.board from the chassis
base.
5. Remove the spring "a" from behind the playback /
recording head.
6. Loosen the reversing azimuth screw retaining the
playback head.
7. Take out the playback head from the front of the
head mount.
8. The recording and eraser heads should also be
removed similarly according to Steps 1~7 above.
Reassembling the playback, recording
and eraser heads (See Fig.3)
1. Reassemble the playback head from the front of
the head mount to the position as shown in Fig.3.
2. Fix the reversing azimuth screw.
3. Set the spring a from behind the playback head.
4. Attach the flexible P.C.board to the chassis base
as shown in Fig.3.
5. The recording and eraser heads should also be
reassembled similarly according to Steps 1~4
above.
Flywheel R
Head mount
Trigger arm
Fig.1
(Mechanism A side)
Playback/Recording &
eraser head
Flexible
P.C.board
Spring "a"
Trigger arm
CN301
Head amplifier & mechanism
control P.C. board
Fig.2
Flywheel R
(Mechanism A side)
Reversing azimuth
screw
Playback head
Head
mount
Spring "a"
Flexible
P.C.board
CN302
FPC holder
Fig.3
Head amplifier &
mechanism control
P.C. board
(Mechanism B side)
1-20
MX-G70
Removing the head amp. and mechanism
control board (See Fig. 4)
1.Remove the cassette mechanism assembly.
2.After turning over the cassette mechanism
assembly,remove the five screws "A" retaining
the head amplifier & mechanism control board.
3.Disconnect the connectors CN303 on the board
and the connectors CN301 and on CN302 both
the right and left side reel pulse boards.
4.When necessary, remove the 4pin parallel
wire soldered to the main motor
A
Head amplifier &
mechanism control board
A
CN303
CN302
Removing the capstan motor assembly
A
CN301
A
Flexible
board
(See Fig.5 to 7)
1.Remove the six screws "B" retaining capstan
motor assembly (See Fig. 5).
2.While raising the capstan motor, remove the
capstan belts A and B respectively from the
motor pulley (See Fig. 6).
Flexible
board
A
Fig.4
B
B
Capstan motor
assembly
Caution 1: Be sure to handle the capstan
belts so carefully that these belts
will not be stained by grease and
other foreign matter. Moreover,
these belts should be hand while
referring to the capstan belt
hanging method.(See Fig.6 and 7)
B
B B B
Fig.5
Capstan motor
Capstan
belt A
Capstan
belt A
Capstan
belt B
Fig.7
Capstan
belt B
Motor pulley
Fig.6
1-21
MX-G70
Removing the capstan motor (See Fig. 8)
C
Capstan motor
From the joint bracket, remove the two screws "C"
retaining the capstan motor.
Joint
bracket
Removing the flywheel (See Fig. 9,10)
1.Remove the head amp. and mechanism control
P.C.Board.
2.Remove the capstan motor assembly.
3.After turning over the cassette mechanism, remove
the two slit washers "a" & "b" fixing the capstan shafts
R and L, and pull out the flywheels R and L respectively
from behind the cassette mechanism.
C
Fig.8
Flywheel R
Flywheel L
a
Flywheel R
b
Slit
washer "a"
Flywheel L
Fig.10
Slit
washer "b"
Fig.9
Removing the reel pulse board and solenoid
(See Fig. 11)
1.Remove the five pawls (c,d,e,f,g) retaining
the reel pulse P.C.Board.
2.From the surface of the reel pulse P.C.Board parts,
remove the two pawls "h" and "i" retaining the solenoid.
c
h
d
e
f
g
Reel pulse board
i
Solenoid
Solenoid
1-22
Fig.11
MX-G70
< Speaker section >
Attention which adheres to speaker box
The speaker box of this model is a unit supply.
Therefore, we do not supply it as individual parts though
the method of disassembling the speaker box has been
described.
Removing the side cover
A
A
(See Fig.1)
Side cover
1. Remove the four screws A on the side of the body.
A
A
Removing the sub woofer speaker
(See Fig.2)
Fig.1
Prior to performing the following procedure, remove
the side cover.
1. Remove the four screws B on the side of the body.
B
Sub woofer speaker
2. Disconnect the red and black wires from the speaker
terminals on the sub woofer speaker.
Removing the front cover (See Fig.3 to 4)
Prior to performing the following procedure, remove
the side cover.
1. Remove the four screws C respectively.
B
2. Remove the front cover toward the front and
disconnect the yellow and black wires from the
tweeter speaker terminals.
Fig.2
C
C
Tweeter speaker
Front cover
C
Fig.4
C
Fig.3
1-23
MX-G70
Removing the woofer speaker (See Fig.5)
Prior to performing the following procedure, remove
the side cover and the front cover.
1. Remove the four screws D on the front of the body.
2. Pull out the woofer speaker toward the front and
disconnect the wire (yellow and black, blue and
black) from the two speaker terminals.
D
D
Removing the tweeter speaker
(See Fig.6)
Woofer speaker
Fig.5
Prior to performing the following procedure, remove
the side cover and the front cover.
1. Remove the two screws F attaching the tweeter
speaker on the back of the front cover.
F
Tweeter speaker
Front cover
1-24
Fig.6
MX-G70
Adjustment method
Measurement instruments required
for adjustment
1. Low frequency oscillator,
This oscillator should have a capacity to output 0dBs
to 600ohm at an oscillation frequency of 50Hz-20kHz.
2. Attenuator impedance : 600ohm
3. Electronic voltmeter
4. Frequency counter
5. Wow flutter meter
6. Test tape
VTT712 : For Tape speed and wow flutter ( 3kHz)
VTT724 : For Reference level (1kHz)
TMT7036 : For Head angle(10kHz),Play back frequency
characteristics(1kHz),and dubbing frequency
characteristics(63,1,10kHz)
Because of frequency-mixed tape with 63,1k,10k and
14kHz(250nWb/m -24dB).
Use this tape together with a filter.
7. Blank tape
TAPE : AC-225,
8. Torque gauge : For play and back tension
Forward ; TW2111A, Reverse ; TW2121A
Fast Forward and Rewind ; TW2231A
9. Test disc
: CTS-1000(12cm),GRG-1211(8cm)
10. Jitter meter
Measurement conditions
Power supply voltage
AC240V(50Hz): A model
AC220V(50Hz): UP,UY model
AC110/127/230-240V(50/60Hz): US,UW model
Measurement
output terminal : Speaker out
:TP101(Mesuring for TUNER/DECK/CD)
:Dummy load 6ohm
Radio input signal
AM modulation frequency : 400Hz
Modulation factor : 30%
FM modulation frequency : 400Hz
Frequency displacement : 22.5kHz
Frequency Range
AM
531kHz~1710kHz : UP,US,UW,UY model
522kHz~1629kHz : A model
FM
87.5MHz~108MHz
Standard measurement positions of volume
and switch
Power : Standby (Light STANDBY Indicator)
Sub woofer VOL. : Minimum
Sound mode : OFF
Main VOL. : 0 Minimum
Traverse mecha set position : Disc 1
Mic MIX VOL : MAX (Only US,UW ver.)
ECHO : OFF
Precautions for measurement
1. Apply 30pF and 33kohm to the IF sweeper output
side and 0.082 F and 100kohm in series to
the sweeper input side.
2. The IF sweeper output level should be made as
low as possible within the adjustable range.
3. Since the IF sweeper is a fixed device, there is
no need to adjust this sweeper.
4. Since a ceramic oscillator is used, there is no need
to perform any MPX adjustment.
5. Since a fixed coil is used, there is no need to adjust
the FM tracking.
6. The input and output earth systems are separated.
In case of simultaneously measuring the voltage
in both of the input and output systems with an
electronic voltmeter for two channels, therefore,
the earth should be connected particularly.
7. In the case of BTL connection amplifier, the minus
terminal of speaker is not for earthing. Therefore,
be sure not to connect any other earth terminal
to this terminal. This system is of an OTL system.
1-25
MX-G70
Arrangement of adjusting positions
Cassette mechanism section (Mechanism A section)
Cassette mechanism section (Back side)
Head azimuth
adjusting screw
(Forward side)
Head azimuth
adjusting screw
(Forward side)
Playback
head
Head azimuth
adjusting screw
(Reverse side)
Head azimuth
adjusting screw
(Reverse side)
Playback, recording and eraser
heads or playback head
Cassette Mechanism Unit Section
Tape speed ADJ
Bias ADJ L
Bias ADJ R
1-26
MX-G70
Tape recorder section
Items
Measurement
conditions
Measurement method
Standard
values
Adjusting
positions
Confirmation
of head angle
Test tape
:TMT7036(10kHz)
Measurement
output terminal
:Speaker terminal
Speaker R
(Load resistor:6 )
:Headphone terminal
1.Playback the test tape TMT7036(10kHz).
2.With the playback mechanism or recording &
playback mechanism, adjust the head azimuth
screw so that the forward and reverse output
levels become maximum.After adjustment,lock
the head azimuth at least by half a turn.
3.In either case,this adjustment should be
performed in both the forward and reverse
directions with the head azimuth screw.
Maximum
output
Adjust the head
azimuth screw
only when the
head has been
changed.
Confirmation
of tape speed
Test tape
:VTT712(3kHz) or
TMT7036(3kHz)
Measurement
output terminal
:Headphone terminal
<Constant speed>
Adjust VR301 so that the frequency counter reading
becomes 3,000Hz 60Hz when playing back the
test tape VTT712(3kHz)with the playback mechanism
or playback and recording mechanism after ending
forward winding of the tape.
Tape speed
of decks
(A and B)
:3,000Hz
60Hz
VR301
Reference values for confirmation items
Items
Double tape
speed
Measurement
conditions
Test tape
:TMT7036(10kHz)
Measurement
output terminal
:Speaker terminal
Speaker R
(Load resistance:6 )
measurement
output terminal
:Headphone terminal
Difference
between the
forward and
reverse speed.
P.mecha and
R/P mecha
speed
Wow & flutter
Test tape
:TMT7036(10kHz)
Measurement
output terminal
:Headphone terminal
Measurement method
After setting to the double speed motor, confirm
that the frequency counter reading becomes
4,800+400/-300Hz when the test tape VTT712
(3kHz) has been play back with the playback
mechanism.
Adjusting
Standard
positions
values
4,800+400/ Playback
-300Hz
mechanism side
When the test tape VTT712(3kHz) has been played
back with the playback mechanism or recording and
playback mechanism at the beginning of forward
winding, the frequency counter reading of the
difference between both of the mechanisms should
be 6.0Hz or less.
60Hz or
less
Both the playback
and recording &
playback
mechanism
When the test tape VTT712(3kHz) has been played
back with the playback mechanism or recording and
playback mechanism at the beginning of forward
winding the frequency counter reading of wow &
flutter should be 0.25% or less(WRMS).
with in
0.25%
JIS(WTD)
Both the playback
and recording &
playback
mechanism
1-27
MX-G70
Electrical performance
Measurement
Measurement method
conditions
Adjustment of *Mode : Forward or
1.With the recording and playback mechanism,
recording bias
reverse mode
load the test tapes(AC-225 to TYP ),and set the
current
*Recording mode
mechanism to the recording and
(Reference
*Test tape
pausing conditions in advance.
value)
: AC-225
2.After connecting 100 in series to the recorder
Measurement output
head,measure the bias current with a valve
terminal
voltmeter at both of the terminals.
:Both recording and 3.After resetting the [PAUSE] mode,start recording.
headphone terminals At this time,adjust VR101 for LcH and VR201 for
RcH so that the recording bias current values
become 4.0 A (TYP ).
Standard
values
AC-225
:4.20 A
Adjusting
positions
LcH
:VR101
RcH
:VR201
Adjustment of
recording and
playback
frequency
characteristics
Output
deviation
between
1kHz and
10kH
:-1dB 2dB
LcH
:VR101
RcH
:VR201
Items
Reference frequency
:1kHz and 10kHz
(REF:-20dB)
Test tape
:TYP AC-225
Measurement input
terminal
:OSC IN
1.With the recording and playback mechanism,load
the test tape(AC-225 to TYP ),and set the
mechanism to the recording and pausing condition
in advance.
2.While repetitively inputting the reference frequency
signal of 1kHz and 10kHz from OSC IN, record and
playback the test tape.
3.While recording and playing back the test tape in
TYP ,adjust VR101 for LcH and VR201 for RcH
so that the output deviation between 1kHz and
10kHz becomes -1dB 2dB.
Reference values for electrical function confirmation items
Items
Measurement
conditions
Recording
*Recording and
bias frequency playback side forward
or reverse
*Test tape
:TYP
AC-225
*Measurement
terminal BIAS TP on
P.C.board
Eraser current *Recording and
(Reference
playback side forward
value)
or reverse
*Recording mode
*Test tape
:AC-225
Measurement terminal
Both of the eraser
head
1-28
Measurement method
1.While changing over to and from BIAS 1 and 2,
confirm that the frequency is changed.
2.With the recording and playback mechanism.
load the test tape (AC-225 to TYP ),and set the
mechanism to the recording and pausing
conditions in advance.
3.Confirm that the BIAS TP frequency on the
P.C.board is 100kHz 6kHz.
1.With the recording and playback mechanism,
load the test tapes(AC-225 to TYP ),and set the
mechanism to the recording and pausing condition
in advance.
2.After setting to the recording conditions,connect
1M in series to the eraser head on the recording
and playback mechanism side,and measure the
eraser current from both of the eraser terminal.
Standard
values
100kHz
+9kHz
-7kHz
TYP
:75mA
Adjusting
positions
MX-G70
Flow of functional operation until TOC read
Check Point
Play Key
Power ON
Slider turns REST
SW ON.
Confirm that the voltage at the pin5
of CN801 is "H"\"L"\"H".
Automatic tuning
of TE offset
Check that the voltage at the
Laser ON
pin40 of IC651 is + 5V?
Detection of disc
Automatic tuning of
Focus offset
Automatic measurement of
Focus S-curve amplitude
Disc is rotated
Tracking error waveform at TOC reading
pin 25 of
IC601(TE)
Approx.3sec
Confirm that the Focus error
S-cuve signal at the pin28 of
IC651 is approx.2Vp-p
Confirm that the signal from
pin24 IC651 is 0V as a
accelerated pulse during
approx.400ms.
Focus servo ON
(Tracking servo ON)
Approx
1.8V
VREF
Automatic measurement of
Tracking error amplitude
Tracking
Disc to be
servo
braked to stop
on states
Disc states
TOC reading
to rotate
finishes
Automatic measurement
of TE amplitude and
500mv/div
automatic tuning of
2ms/div Fig.1
TE balance
Tracking
servo
off states
Confirm the waveform of
the Tracking error signal.
at the pin 25 of IC601 (R604)
(See fig-1)
Automatic tuning of
Tracking error balance
Automatic tuning of
Focus error balance
Automatic tuning of
Focus error gain
Automatic tuning of
Tracking error gain
TOC reading
Confirm the eys-pattern
at the lead of TP1
Play a disc
1-29
MX-G70
Maintenance of laser pickup
(1) Cleaning the pick up lens
Before you replace the pick up, please try to
clean the lens with a alcohol soaked cotton
swab.
(2) Life of the laser diode
When the life of the laser diode has expired,
the following symptoms will appear.
Replacement of laser pickup
Turn off the power switch and, disconnect the
power cord from the ac outlet.
Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)
1. The level of RF output (EFM output : ampli
tude of eye pattern) will below.
Is the level of
RFOUT under
1.25V 0.22Vp-p?
NO
Replace it.
Plug the power cord in, and turn the power on.
At this time, check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.
YES
O.K
Play a disc.
Check the eye-pattern at TP1.
Finish.
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser
power. Since this adjustment should be performed to match the characteristics of the whole optical block, do not
touch the semi-fixed resistor.
If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should
be replaced.
If the semi-fixed resistor is adjusted while the pickup is functioning normally, the laser pickup may be damaged
due to excessive current.
1-30
MX-G70
Description of major ICs
AN7345(IC302) : PB/REC AMP
1. Block diagram
L1
L2
NF1
OUT1
EQ1
24
23
22
21
20
EQ
CTL1 RIN1 RNF1 ROUT1 CTL
19
18
Pre
Source
CTRL
Pre
AMP
16
17
15
ALC
AMP
RF
VCC
14
13
REPPLE
REJ
EQ
Pre
AMP
1
2
3
4
R1
R2
NF2
OUT2
5
ALC
ALC
AMP
CTRL
6
EQ2 CTL2
7
8
10
9
RIN2 RNF2 ROUT2 LC
11
12
LPF
GND
2. Pin Function
Pin
No.
Symbol
I/O
Function
Pin
No.
Symbol
I/O
Function
1
R1
I
Playback amplifier input
13
Vcc
I
Power supply
2
R2
I
Playback amplifier input
14
RF
I
Ripple filter
3
NF2
I
Playback amplifier negative feedback
15
EQCTL
I
EQ control
4
OUT2
O
Playback amplifier output
16
ROUT1
O
Recording amplifier output
5
EQ2
I
Equalizer
17
RNF1
I
Recording amplifier negative feedback
6
CTL2
I
Pre Amplifier input switching time
constant
18
RIN1
I
Recording amplifier input
7
RIN2
I
Recording amplifier input
19
CTL1
I
Pre amplifier input switching control
8
RNF2
I
Recording amplifier negative feedback
20
EQ1
I
Equalizer
Recording amplifier output
21
OUT1
O
Playback amplifier output
NF1
I
Playback amplifier negative feedback
9
ROUT2
O
10
LC
I
ALC low cut
22
11
LPF
I
ALC low pass filter
23
L2
I
Playback amplifier input
12
GND
I
24
L1
I
Playback amplifier input
1-31
MX-G70
BA15218F-XE (IC652) / BA15218N (IC481,501,502,526,571) : Dual op. amp.
1. Pin layout
OUT1 1
8 Vcc
-IN1 2
7 OUT2
1
+IN1 3
6 -IN2
2
VEE 4
5 +IN2
2. Block diagram
Vcc
R1
Q8
Q5
Q13
Q18
Q19
Q11
-IN
Q1 Q2
Q9
R6
OTHER
CH
Q16
Q10
+IN
C2
R5
R7
R8
D1
Q12
Q6
Q3
R2
Q4
C1
R3
Q7
Q14 Q114 Q15
R4
VEE
OUTPUT
1-32
Q17
R9
MX-G70
1
2
3
4
5
6
REC
SW
G
P/B
SW
Vcc
GND
CONT.
P/B
SW
G
REC
SW
BA3126N(IC301) : R/P Switch
7
8
9
BU4094B(IC303):Serial to parallel port extension
1.Pin layout
2.Block diagram
STROBE
DATA
1
2
16
15
Vdd
OUTPUT ENABLE
CLOCK
Q1
Q2
3
4
5
14
13
12
Q5
Q6
Q7
Q3
Q4
Vss
6
7
8
11
10
9
Q8
Q's
Qs
2
DATA
10
8-STAGE
SHIFT REGISTER
3
CLOCK
STROBE
OUTPUT
ENABLE
1
8-BIT
LATHES
15
3-STATE
OUTPUTS
9
Q's
SERIAL
Qs OUTPUT
Q8
Q1
PARALLEL OUTPUT
KIA7019AP (IC830) : Voltage detector
1. Pin layout
2. Pin function
Pin No.
1
2
3
1
2
Function
Vcc
Ground
OUT
3
1-33
MX-G70
LB1641 (IC851,IC852) : DC motor driver
1. Pin layout
3
4
5
GND OUT1 P1
1
2
VZ
IN1
6
7
8
9
IN2 VCC1 VCC2 P2
10
OUT2
2. Pin function
Input
Output
Mode
IN1
IN2
OUT1
OUT2
0
0
0
0
1
0
1
0
0
1
0
1
COUNTER-CLOCKWISE
1
1
0
0
Brake
Brake
CLOCKWISE
NJM4580L (IC901) : Mic Amplifier
1. A OUTPUT
2. A-INPUT
3. A+INPUT
4. V 5. B+INPUT
6. B-INPUT
1
1-34
2
3
4
5
6
7
8
7. B OUTPUT
MX-G70
BA3835S (IC812) : SPI B.P.F.
1.Block Diagrams
BIASC
1
BIAS
18 GND
VREFC
2
VREF
17
AOUT
RREF
3
REFERENCE
CURRENT
16
TEST
N.C.
4
15
N.C.
14
N.C.
13
SEL
12
C
11
B
10
A
N.C.
5
DIFOUT
6
105Hz
BPF
PEAK
HOLD
340Hz
BPF
PEAK
HOLD
1kHz
BPF
PEAK
HOLD
RES
RES
A-C
MPX
RES
CIN
7
AIN
8
VCC
9
DIF
3.4kHz
BPF
PEAK
HOLD
10.5kHz
BPF
PEAK
HOLD
RES
RES
DEC
2.Pin Function
No.
Symbol
I/O
Function
1
BIASC
-
Decoupling condenser connection terminal.
2
VREFC
-
Decoupling condenser connection terminal.
3
RPEF
-
Reference resistance connection terminal.
4
NC
-
Non connect.
5
NC
-
Non connect.
6
NC
-
Non connect.
7
CIN
-
Connected to GND of audio system through a condenser.
8
AIN
I
Inputs the audio signal through a condenser.
9
VCC
-
Power supply terminal.
10
SPI-A
O
Output selection control terminal.
11
SPI-B
O
Output selection control terminal.
12
SPI-C
O
Output selection control terminal.
13
SPICSB
O
Output selection control terminal.
14
NC
-
Non connect.
15
NC
-
Non connect.
16
TEST
-
Connected to GND upon normal use.
17
AOUT
O
Multi-plexor output terminal.
18
GND
-
Connect to GND.
1-35
MX-G70
BA3837(IC466):MIC Mixer
1.Block diagram
C
16
B
15
ROUT
13
A
14
LP
12
LP
10
+
- +
LOGIC
LP
11
RIN
9
- +
R
L+R
SW2
SW1
- +
L-R
+
+
L
+ 1
VCC
2
MIC
+ 3
LOUT
4
FK
5
TK
6
LIN
7
BIAS
8
GND
2.Pin function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1-36
Symbol
VCC
MIC IN
LOUT
FK
TK
LIN
BIAS
GND
RIN
LPF1
LPF2
LPF3
ROUT
CONTA
CONTB
CONTC
I/O
I
O
I
I
I
O
O
O
O
I
I
I
Description
Power supply
Microphone mixing input
Channel L output
Non connect
Non connect
Channel L input
Signal bias
Connect to GND
Channel R input
Connects to LPF time constant element
Connects to LPF time constant element
LPF outpout
Channel R output
Mode select input A
Mode select input B
Mode select input C
MX-G70
BU9253AS(IC902) : LPF&ECHO MIX.
1.Pin layout & block diagram
1
ECHO VR
2
OSC
COUNTER
GND
18 CR
17 MUTE
16
BIAS
4
15 VCC
DAINT IN
5
14 ADINT IN
DAINT OUT
6
DALPF IN
7
A/D
D/A
SRAM
3
12 ADLPF OUT
-+
MIX OUT
9
11 ADLPF IN
MIX
8
-+
DALPF OUT
13 ADINT OUT
10 MIX IN
2.Pin function
Pin No.
Symbol
I/O
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
GND
ECHO VR
I
I
O
I
O
O
I
I
O
O
I
I
-
BIAS
DAINT IN
DAINT OUT
DALPF IN
DALPF OUT
MIX OUT
MIX IN
ADLPF IN
ADLPF OUT
ADINT OUT
ADINT IN
VCC
NC2
MUTE
CR
Descriptions
Connect GND
Echo level control
Non connect
Analog part DC bias
DA side integrator input
DA side integrator output
DA side LPF input
DAside LPF output
Mix AMP output for original tone& echo tone
Mix AMP input pin for original tone
AD side LPF input
AD side LPF output
AD side integrator output
AD side integrator input
Power supply
Non connect
Mute control signal input
CR pin for oscillator
1-37
MX-G70
LA1838(IC1): FM AM IF AMP&detector, FM MPX decoder
1. Block Diagram
30
29
27
28
25
26
24
23
22
20
21
18
19
17
16
REG
ALC
AM
MIX
AM
FM
RF.AMP
DECODER
ANIT-BIRDIE
OSC
MUTE
BUFF
P-DET
STEREO
5N
SW
AGC
DET
AM IF
SD
COMP
VCO
384KHz
FF
38k
FF
19k / 2
10
11
12
FF
19k /LS
PILOT
DET
AM
S-METER
FM
S-METER S-CLRVE
AM/FM
IF-BUFF
TUNING
DRIVE
STEREO
DRIVE
PM
DET
FM IF
GND
2
1
5
VCC
8
9
Pin
No.
Symbol
I/O
Function
This is an input terminal of FM IF
signal.
16
L OUT
O
Left channel signal output.
O This is an out put terminal for AM
mixer.
17
R OUT
O Right channel signal output.
3
4
6
7
13
14
15
Pin
No.
Symbol
I/O
1
FM IN
I
2
AM MIX
3
FM IF
I
Bypass of FM IF
18
L IN
I
Input terminal of the left channel post
AMP.
4
AM IF
I
Input of AM IF Signal.
19
R IN
I
Input terminal of the right channel
post AMP.
5
GND
I
This is the device ground terminal.
20
RO
O
Mpx Right channel signal output.
6
TUNED
O
When the set is tuning, this terminal
becomes "L".
21
LO
O
Mpx Left channel signal output.
7
STEREO
O
Stereo indicator output. Stereo "L",
Mono: "H"
22
IF IN
I
Mpx input terminal
8
VCC
I
This is the power supply terminal.
23
FM OUT
O
FM detection output.
9
FM DET
I
FM detect transformer.
24
AM DET
O
AM detection output.
10
AM SD
I
This is a terminal of AM ceramic filter.
25
AM AGC
I
This is an AGC voltage input terminal
for AM
11
FM VSM
O
Adjust FM SD sensitivity.
26
AFC
I
2. Pin Function
This is an output terminal of voltage
for FM-AFC.
12
AM VSM
O
Adjust AM SD sensitivity.
27
AM RF
I
AM RF signal input.
13
MUTE
28
REG
O
Register value between pin 26 and pin28
desides the frequency width of the
14
FM/AM
I/O When the signal of IF REQ of IC121(
LC72131) appear, the signal of FM/AM
IF output. //Muting control input.
I
Change over the FM/AM input.
input signal.
29
AM OSC
I
Function
"H" :FM, "L" : AM
15
1-38
MONO/ST O Stereo : "H", Mono: "L"
30 OSC BUFFER O
This is a terminal of AM Local
oscillation circuit.
AM Local oscillation Signal output.
MX-G70
LA6541-X (IC801) : Servo driver
1. Pin Layout & block diagram
Vcc
Vref
Vin4
Vg4
24
23
22
21
Vo8
Vo7
20
19
Gnd
Vg3
Vin3
Cd
Res
17
16
15
14
13
11k
ohm
-
+
Vo5
18
Vcc
11k
ohm
-
Vo6
+
Level
shift
BTL
driver
BTL
driver
Level
shift
RESET
Level
shift
BTL
driver
BTL
driver
Level
shift
Regulator
11k
ohm
11k
ohm
1
2
3
4
Vcc
Mute
Vin1
Vg1
5
Vo1
6
Gnd
Vo2
7
8
9
10
11
12
Vo3
Vo4
Vg2
Vin2
Reg
out
Reg
In
2. Pin function
Pin
No.
Symbol
1
Vcc
Power supply (Shorted to pin 24)
2
Mute
All BTL amplifier outputs ON/OFF
3
Vin1
BTL AMP 1 input pin
4
Vg1
BTL AMP 1 input pin (For gain adjustment)
5
Vo1
BTL AMP 1 input pin (Non inverting side)
6
Vo2
BTL AMP 1 input pin (Inverting side)
7
Vo3
BTL AMP 2 input pin (Inverting side)
8
Vo4
BTL AMP 2 input pin (Non inverting side)
9
Vg2
BTL AMP 2 input pin (For gain adjustment)
10
Vin2
BTL AMP 2 input pin
11
Reg Out
12
Reg In
13
Res
Reset output
14
Cd
Reset output delay time setting (Capacitor connected externally)
15
Vin3
BTL AMP 3 input pin
16
Vg3
BTL AMP 3 input pin (For gain adjustment)
17
Vo5
BTL AMP 3 output pin (Non inverting side)
18
Vo6
BTL AMP 3 output pin (Inverting side)
19
Vo7
BTL AMP 4 output pin (Inverting side)
20
Vo8
BTL AMP 4 output pin (Non inverting side)
21
Vg4
BTL AMP 4 output pin (For gain adjustment)
22
Vin4
BTL AMP 4 output pin
23
Vref
Level shift circuit's reference voltage application
24
Vcc
Power supply (Shorted to pin 1)
Function
External transistor collector (PNP) connection. 5V power supply output
External transistor (PNP) base connection
1-39
MX-G70
LC72136N (IC2) : PLL frequency synthesizer
1. Pin layout
XT
FM/AM
CE
DI
CLOCK
DO
FM/ST/VCO
AM/FM
LW
MW
SDIN
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
XT
GND
LPFOUT
LPFIN
PD
VCC
FMIN
AMIN
IFCONT
IFIN
2. Block diagram
Phase
Detector
Charge Pump
Reference
Driver
1
18
22
19
20
16
Swallow Counter
1/16,1/17 4bit
1/2
Unlock
Detector
12bit
Programmable
DriverS
15
12
3
4
C2B
I/F
5
Universal
Counter
Data Shift Register & Latch
6
Power
on
Reset
17
21
7
8
2
11 13
3. Pin function
Pin
No.
Pin
No.
Symbol
I/O
X'tal oscillator connect (75kHz)
12
IFIN
I
IF counter signal input
O
LOW:FM mode
13
IFCONT
O
IF signal output
I
When data output/input for 4pin(input) and
14
-
Not use
Symbol
I/O
1
XT
I
2
FM/AM
3
CE
Function
Function
6pin(output): H
4
DI
I
Input for receive the serial data from
15
AMIN
I
AM Local OSC signal output
controller
5
6
CLOCK
DO
I
Sync signal input use
16
FMIN
I
FM Local OSC signal input
O
Data output for Controller
17
VCC
-
Power suplly(VDD=4.5-5.5V)
Output port
7
FM/ST/VCO
O
"Low": MW mode
When power ON:Reset circuit move
18
PD
O
PLL charge pump output(H: Local OSC
frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
8
AM/FM
O
Open state after the power on reset
19
LPFIN
I
Input for active lowpassfilter of PLL
9
LW
I/O
Input/output port
20
LPFOUT
O
Output for active lowpassfilter of PLL
10
MW
I/O
Input/output port
21
GND
-
Connected to GND
I/O
Data input/output
22
XT
I
X'tal oscillator(75KHz)
11
1-40
SDIN
MX-G70
MN101C35DEC2 (IC810) : System controller
Pin function (1/2)
Pin No.
Symbol
I/O
1
2
3
4
5
6
7
8
9,10
11
12,13
14
15
16C19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47~63
KCMND
MSTAT
KCLK
DATAOUT
DATAIN
CK
NC
VDD
OSC2,1
VSS
NC
MMOD
VREFKEY1~4
SLCKEY1
SLCKEY2
NC
SPIDTI
VREF+
MRDY
RESET
BASS VOL+
BASS VOLAUX MUTE
RDSDATA/KARA
SPI A
SPI B
REMIN
PHOTOA
PHOTOB
SOUNDMODE+
RDS_CLK
PRT
TAPE LED
ECON
POUT
VOLDA/EXT
VOLCK/EXT
EXTCE
SLCCE
VC3 RESET
G17~1
O
I
O
O
I
O
I/O
I
I
I
I
I
I
I
I
O
I
O
O
I
I
I
I
I
I
O
O
O
O
O
O
O
O
O
Function
VC3 Serial data output
VC3 status input
VC3 Serial clock
SLC/TUNER data output
TUNER data input
SLC/TUNER clock
Not used
Power supply +5V
Oscillation terminal (8MHz)
Connect to GND
Not used
Connect to GND
Connect to GND
Key matrix input 1~4
SLC Key input 1
SLC Key input 2
Not used
SPI Analog data input
AD +5V
VC3 Ready
Micon reset
Bass volume +
Bass volume Aux muting
RDS Data / Karaoke
SPI A data
SPI B data
Remote control signal input
SLC Photo-A
SLC Photo-B
Soundmode reverse
RDS Clock
Protector input
Tape LED
Economy ON
Power ON
Volume / EXT IC Data
Volume / EXT IC CLK
EXT IC Chip select
SLC Chip enable
VC3 Reset
FL Display grid
1-41
MX-G70
Pin function (2/2)
1-42
Pin No.
Symbol
I/O
Function
64~85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
P22~P1
TUCE
SMUTE
SEARCH LE
CD1 LED
CD2 LED
CD3 LED
R SEARCH
MSI
MPX
INH
F SEARCH
VOL VOL +
SOUNDMODE
VPP
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
-
FL segment control signal output
Tuner chip enable
System mute
Skip LED
LED Control signal output (CD1)
LED Control signal output (CD2)
LED Control signal output (CD3)
Reverse skip
Music scan input
Tuner stereo indicator
Backup mode detect
Forward skip
Rotary encoder VOLRotary encoder VOL+
Soundmode foeward
-B for FL
MX-G70
MN662748RPM (IC651) : Digital servo & digital signal processer
1. Pin layout
20 ~
1
21
80
~
~
40
61
41 ~
60
2.Block diagram
LRCKIN(MSEL)
BCLK(SSEL)
SRDATAIN
(PSEL)
DIGITAL
DEEMPHSIS
8TIMES
OVER SAMPUNC
DIGITAL FILTER
IOSEL
1BIT
DAC
LOGIC
S
CLVS
CRC
BLKCK
CLDCK
SBCK
SUBC
DEMPH
RESY
FLAG6(RESY)
SSEL
SQCK
SUBQ
AVDD2
PEM
(L)
EFM
DEMODULATION
DIGITAL
AUDIO
INTERFASE
16k
SRAM
SYNC
INTERPOLATION
SUBCODE
DEMODULATION
DSL.
PLL
VCO
CIRC
ERROR
CORRECTION
DEINTERLEVE
MLD
MCLK
MDATA
CK384(EFM)
VCOF
BYTCK
SMCK
FCLK
CSEL
MSEL
X2
X1
OUTL
FLAG
IPFLAG
SUB
CODE
BUFFER
AVDD2
PCK
EFM
PLLF
DSLF
IREF
DRF
ARF
RSEL
PSEL
AVSS1
AVDD1
OUTR
PEM
(R)
MICRO
COMPUTER
INTERFACE
VCO
TX
DIGITAL
AUDIO
INTERFASE
ECM
INTER POLATION
SOFT MUTING DIGITAL
ATTENUATION
PEAK DETECTIVE
AUTO CUE
LRCK
SRDATA
BCLK
DMUTE
PC
TRKV
KICK
VREF
TRVSTR
ECS
TVD
TRD
FOD
TBAL
FBAL
TOFS
TES
/TLOCK
/FLOCK
PLAY
LDON
WVEL
SENSE
CLV
SERVO
D/A
CONVERTER
ITUNING
GENERATION
PITCH
CONTROL
ÊSTAT
OUTPUT
A/D
COVERTER
V V
D S
D S
D
V
D
D
1
D / /
V R T
S S E
S T S
1
T
F
E
T
E
R
F
E
N
V
INPUT
T
R
C
R
S
V
D
E
T
PORT
SERVO
TIMING GENERATOR
B
D
O
/
R
F
D
E
O
F
T
1-43
MX-G70
3. Pin function
Function
BCLK
O Not used
2
LRCK
Not used
3
SRDATA O Not used
PLLF2
42 TOFS
Function
O Tracking error shunt signal output (H:shunt)
Not used
43
WVEL
Not used
44
ARF
I
RF signal input
45 IREF
I
Reference current input pin
I
Bias pin for DSL
DVDD1
Power supply (Digital)
5
DVSS1
Connected to GND
6
TX
O Digital audio interface output
46 DRF
MCLK
CPU command clock signal input
I
(Data is latched at signal's rising point)
47 DSLF
I/O Loop filter pin for DSL
8
MDATA
I
48 PLLF
I/O Loop filter pin for PLL
9
MLD
I CPU command load signal input
10 SENSE
O Sense signal output
50
AVDD2
11
FLOCK
O Focus lock signal output Active :Low
51
AVSS2
12
TLOCK
O Tracking lock signal output Active :Low
52
EFM
13
BLKCK
O sub-code/block/clock signal output
53
PCK/
DSL2
14 SQCK
I
15
O Sub-code Q -code output
I
I
Not used
I
DSL balance output
Not used
Status signal
(CRC,CUE,CLVS,TTSTOP,ECLV,SQOK)
57
VSS
I
O
56 SBCK
Connected to GND (for X'tal oscillation
circuit)
I
Reset signal input (L:Reset)
58
XI
I
Input of 16.9344MHz X'tal oscillation circuit
59 X2
60
VDD
BYTCK
62 CLDCK
23
PC
Not used
Not used
Not used
mode output) 3-State
Spindle motor drive signal (Servo error
O
signal output)
O Kick pulse output
Not used
FLAG
Not used
66 CLVS
Not used
27 TRD
O Tracking drive output
67
CRC
Not used
28
O Focus drive output
68
DEMPH
24 ECM
25
ECS
26
KICK
FOD
I
I
61
O Traverse drive output
I
O Traverse enforced output
TVD
I
TRV
22
Power supply (for X'tal oscillation circuit)
I
21
O Output of X'tal oscillation circuit
I
Not used
I
Not used
PMCK
I
SMCK
20
I
19
I
55 SUBC
I
RST
VCOF2
Not used
Connected to GND
17 STATUS O
18
54
Power supply (Analog)
Connected to GND (Analog)
The external circuit is regulated for crystal.
I
SUBQ
16 DMUTE
Outside clock for sub-code Q resister input
Not used
I
49 VCOF
I
CPU command data input
I
7
I
4
I
O
41
Symbol I/O
I
1
Pin
No.
I
Dymbol I/O
I
Pin
No.
O
Not used
Spindle motor drive signal (Enforced
63 FCLK
64 IPPLAG
65
FBAL
O Focus Balance adjust signal output
70 IOSEL
I
30
Not used
I
69 RESY
pull up
31
TBAL
O Tracking Balance adjust signal output
71
TEST
I
Reference voltage input pin for D/A
output block (TVD,FOD,FBA,TBAL)
pull up
32
FE
I
Focus error signal input (Analog input)
72
AVDD1
I
I
Power supply (Digital)
33
TE
I
Tracking error signal input (Analog input)
73
OUT L
O Lch audio output
34
RF ENV
I
RF envelope signal input (Analog input)
74
AVSS1
I
29 VREF
Not used
35
VDET
I
Vibration detect signal input (H:detect)
75
OUT R
O Rch audio output
36
OFT
I
Off track signal input (H:off track)
76 RSEL
I
Track cross signal input
77 CSEL
78 PSEL
79
BDO input pin (L:detect)
40
LDON
O Laser ON signal output (H:on)
1-44
MSEL
80 SSEL
I
I
I
I
BDO
I
RFDET
39
Connected to GND
Connected to GND
I
38
RF detect signal input (L:detect)
pull up
Connected to GND
I
37 TRCRS
Connected to GND
Pull up
MX-G70
STK402-030 (IC602) : Power amplifier
1.Pin layout
1
15
2.Block diagram
8
4
TR9
TR7
R13
R1
TR4
TR11
R6
R8
C1
C2
TR14
1
TR12
TR5
TR1
TR2
R11
R3
TR10
TR8
2
R4
R12
R5
TR3
TR15
TR6
TR13
R10
TR16
D1
R7
R2
R9
R14
9
SUB
5
13
12
7 6 10 11
14 15
1-45
MX-G70
TDA7439 (IC436) : Control volume
1.Pin layout
SDA
CRE
Vs
AGND
ROUT
LOUT
R-IN4
R-IN3
R-IN2
R-IN1
L-IN1
L-IN2
L-IN3
L-IN4
MUXOUTL
1
30
2
29
3
28
4
27
5
26
6
25
7
24
8
23
9
22
10
21
11
20
12
19
13
18
14
CSL
DIG GND
TREBLE(R)
TREBLE(L)
MIN(L)
MOUT(L)
BOUT(L)
BIN(L)
BOUT(R)
BIN(R)
MOUT(R)
MIN(R)
INR
MUXOUTR
INL
17
TDA7439
15
16
MUXOUT
INL
TREBLE(L)
MIN(L)
MOT(L)
BIN(L)
BOUT(L)
2.Block diagram
15
16
27
26
25
23
24
L-IN1 11
G
VOLUME
TREBLE
MIDLE
BASS
L-IN2 12
SPEAKER
ATT
LEFT
L-IN3 13
L-IN4 14
30 SCL
0/30dB
2dB STEP
2
I C BUS DECODER LATCHES
1 SDA
R-IN1 10
29 DIG-GND
R-IN2 9
VOLUME
G
TREBLE
MIDLE
BASS
R-IN3 8
1-46
17
18
28
19
20
21
22
2
MOUT(R)
BIN(R)
BOUT(R)
CREF
3 Vs
4 AGND
MIN(R)
SUPPLY
TREBLE(R)
5 ROUT
INR
INPUT
MULTIPLEXER
GAIN
SPEAKER
ATT
RIGHT
MUXOUT
R-IN4 7
6 LOUT
MX-G70
UPD780024AGKB12 (IC251) : Unit micon
P72/TI50/TO50
P73/TI51/TO51
P74/PCL
P75/BUZ
P64/RD
P65/WR
P66/WAIT
P67/ASTB
P40/AD0
P41/AD1
P42/AD2
P43/AD3
P44/AD4
P45/AD5
P46/AD6
P47/AD7
1. Pin layout
P50/A8
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
48
1
P71/TI01
P51/A9
2
47
P70/TI00/TO0
P52/A10
3
46
P03/INTP3/ADTRG
P53/A11
4
45
P02/INTP2
P54/A12
5
44
P01/INTP1
P55/A13
6
43
P00/INTP0
P56/A14
7
42
Vss1
P57/A15
8
41
X1
Vss0
9
40
X2
VDD0
10
39
IC
P30
11
38
XT1
P31
12
37
XT2
P32
13
36
RESET
P33
14
35
AVDD
P34/SI31
15
34
AVREF
P10/ANI0
P11/ANI1
P12/ANI2
P13/ANI3
P14/ANI4
P15/ANI5
P16/ANI6
P17/ANI7
AVss
VDD1
P25/ASCK0
P24/TxD0
P23/RxD0
P22/SCK30
P21/SO30
P20/SI30
33
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
P36/SCK31
P35/SO31
1-47
MX-G70
2. Block diagram
T100/TO0/P70
16bit Timer/
event counter
Port 0
P00 to P03
8bit Timer/
event counter 50
Port 1
P10 to P17
TI50/TO50/P72
TI51/TO51/P73
8bit Timer/
event counter 51
Port 2
P20 to P25
Watchdog timer
Port 3
P30 to P36
Port 4
P40 to P47
Port 5
P50 to P57
Port 6
P64 to P67
Port 7
P70 to P75
TI01/P71
Watch timer
SI30/P20
SO30/P21
SCK30/P22
Serial
interface30
SI31/P34
SO31/P35
SCK31/P36
Serial
interface31
RxD0/P23
TxD1/P24
ASCK0/P25
78K/0
CPU core
ROM
32k Bytes
RAM
1024 Bytes
AD0/P40 to AD7/P47
UART0
A8P50 to A15/P57
ANO0/P10 to ANI7/P17
AVDD
AVss
AVREF
INTP0/P00 to INTP3/P03
EXTERNAL
ACCESS
A/D
converter
Interruput
control
Buzzer output
System control
BUZ/P75
PCL/P74
1-48
RD/P64
WR/P65
WAIT/P66
ASTB/P67
Clock output
control
VDD0 VDD1 Vss0 Vss1 IC
RESET
X1
X2
XT1
XT2
MX-G70
3.Pin Functions
Pin Name
I/O
P00 to P02
I/O
P03
P10 to P17 Input
P20
P21
P22
P23
P24
P25
P30
P31
P32
P33
P34
P35
P36
P40 to P47
I/O
Function
Alternate
Function
Port 0
INTP0 to
4-bit I/O port
INTP2
INTP3/ADTRG Input /output can be specified in 1-bit units.
An on-chip pull-up resistor can be connected by means of software.
ANI0 to ANI7 Port 1
8-bit input-only port
Port 2
SI30
6-bit I/O port
SO30
Input /output can be specified in 1-bit units.
SCK30
An on-chip pull-up resistor can be connected by means of software.
RxD0
I/O
TxD0
ASCK0
-
I/O
SI31
SO31
SCK31
AD0 TO AD7
P50 to 57
I/O
A8 to A15
P64
P65
P66
P67
P70
P71
P72
P73
P74
P75
I/O
RD
WR
WAIT
ASTB
TI00/TO0
TI01
TI50/TO50
TI51/TO51
PCL
BUZ
I/O
Port 3 (P3)
7-bit I/O port
Input /output can be
specified in 1-bit units.
N-ch open-drain input/output port
An on-chip pull-up resistor can be
specified by the mask option.
LEDs can be driven directly.
An on-chip pull-up resistor can be
connected by means of software.
Port 4
8-bit I/O port
Input /output can be specified in 1-bit units.
An on-chip pull-up resistor can be connected by means of software.
Interrupt request flag (KRIF) is set to 1 by falling edge detection.
Port 5 (P5)
8-bit I/O port
LEDs can be driven directly.
Input /output can be specified in 1-bit units.
An on-chip pull-up resistor can be connected by means of software.
Port 6
4-bit I/O port
Input /output can be specified in 1-bit units.
An on-chip pull-up resistor can be connected by means of software.
Port 7
6-bit I/O port
Input /output can be specified in 1-bit units.
An on-chip pull-up resistor can be connected by means of software.
After
Resist
Input
Input
Input
Input
Input
Input
Input
Input
1-49
MX-G70
VICTOR COMPANY OF JAPAN, LIMITED
AUDIO & COMMUNICATION BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.20986)
200105(V)
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