Page 1
MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-2
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.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and measure the AC voltage across the resistor.
Now, reverse the plug in the AC outlet and repeat each
measurement. Voltage measured any must not exceed 0.75 V
AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).
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.
Good earth groundPlace this
probe on
each exposed
metal part. AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!
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)
Page 2
MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-3
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
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
dangerous to defeat the safety switches.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.
VARNING : Osynlig laserstrålning är denna del är öppnad
och spårren är urkopplad. Betrakta ej strålen.
VARO : Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
Position of labels
WARNING LABEL
!CAUTIONPlease use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
DANGER : Invisibie laser radiation
when open and interlock or
defeated.
AVOID DIRECT EXPOSURE TO
BEAM (e) VARNING : Osynlig laserstrålning
är denna del är öppnad och spårren
är
urkopplad. Betrakta ej strålen.
(s)
VARO : Avattaessa ja suojalukitus
ohitettaessa olet alttiina
näkymättömälle lasersäteilylle.Älä
katso säteeseen. (d) ADVARSEL :Usynlig laserstråling
ved åbning , når
sikkerhedsafbrydere er ude af
funktion. Undgå udsættelse for
stråling. (f)
CLASS 1
LASER PRODUCT
CLASS 1
LASER PRODUCT
Page 7
MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-8Prior to performing the following procedure, remove
the metal cover.
Disconnect the card wire from connector CN1 on the
tuner board on the right side of the body.
Remove the plastic rivet fixing the tuner board.
Remove the two screws G on the back of the body.
1.
2.
3.
Removing the tuner board
(See Fig.12)
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
Remove the screw H attaching the rear cover on the
back of the body.
Push each tab of the four joints b in the direction of
the arrow and release.
Remove the fifteen screws G attaching the rear
panel.
Disengage the joints c on each lower side of the rear
panel using a screwdriver and remove the rear panel
backward. 1.
2.
3.
4.
Removing the rear cover / rear panel
(See Fig.13 to 16)
Fig.12
Fig.13
Fig.14
Fig.15
Fig.16
CN1
Plastic rivetTuner board
Rear panel
Rear panel
H
G
Joint b Joint b
Rear cover
Rear panel
G
G
GG G
Joint c
Joint c Rear panel Rear panel
G
Page 55
H
AB C DE FG 12 3 45
2-6
MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75VMX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
Front key section
SHEET 5/9
SHEET 4/9
SHEET 4/9
SHEET 4/9
SHEET 2/9
TW800 FW915
CN870C901
Q956 Q960
Q953 Q918
Q954
Q941 Q940
C1070C935 FW901C1021
C902Q919
JS901
D1003 S901
S902Q920
D1062
S931
S932
S933S951
R930S935C962 C963 JS962
S936
S937
S939
J1001
TW801 S938
L1002
FW713 S952JS956
C960JS960
C961
S950
S942
S944 S943
S945 S949
S948
S947
S946 S915
S917S916R1068
R1021
R1022J1022 J1021 Q1061IC901
C1068
R1069C1066D1061
R1062R1063
D945
D942 D944
D943R955R908
L1003D904
R904 D905
Q901
R929
R954 R951
D954 R938
R941 R932 R933 R935
R940 R939
D940 R931
D941 R937
R953 R952
R936
L1001
C1002C1001C1004
C1006 C1005R916
D953D957 D956 C956
C957
R956 D961 D960 R960 R942
R944
R943
R946R947
R948R949
R945R950D919 R917
D918
D920R919
R920
C1022
C1023VR901
R1071
R1070
C1065 C1067
R1067
R1066
C1063
R1061 C1062
C1061 R1065
R1064 C1064R918
QUB220-15DMHP QUM027-18Z4Z4
0.01
2200p0.01 QUM027-13DGZ41000p
0.01 QSW0911-001
MTZJ2.4B-T2 MTZJ2.4B-T2
10K0.01 0.01 QSW0862-001
QNS0183-001
QUB220-15DMHP QQL231K-470Y
QUM153-33DGZ4QSW0912-001
0.01QSW0911-001
0.01 20K
4.7k
4.7kQNS0184-001 QNS0184-001 2SD2144S/VW/-TNJM4580L
0.22/50
1K330P1SS133-T2
12K 390
KTA1267/YG/-TKTA1267/YG/-T
KTA1267/YG/-TKRC102M-T
KTA1267/YG/-T
KTA1267/YG/-T KTA1267/YG/-T1.5KKRC102M-T 5.6K
QQR0779-001Z68
L-115XSRD-D-T
KRC102M-T2
KRC102M-T
2K
68 2K
L-914SRD-T 2.2K
68 2.7K 3.9K 5.6K
68 2.7K
L-914SRD-T 2.2K
L-914SRD-T 1.5K
68 1.2K
1.2K
QQL231K-470Y
3900p 3900p1000p
1000p 1000p1K
L-914SRD-TSLA-362LT-T 0.01
0.01
68 SLA-362LT-T 68 3.9K
3.9k 10K2.7K
1.5k1.2k 2.2k
5.6K
1kSLA-362LT-T 1K
SLA-362LT-T
SLA-362LT-T200
200
1000p 1000pQVQ0299-B54
4.7K
560
150P 2.2/50
56
4.7M
4.7/50
10K 100/10
220/10100
1.5k150P200
