PARTS LIST - CABINET, CHASSIS AND ACCESSORIES.........................................17-18
PARTS LIST - CASSETTE DECK MECHANISM.............................................................19
PARTS LIST-MAIN ......................................................................................................21-32
PARTS LIST-DISP ......................................................................................................33-36
PARTS LIST-RF33 ......................................................................................................37-42
CIRCUIT BOARD DIAGRAM ............................................................... SEPARATE SHEET
SCHEMATIC DIAGRAM ...................................................................... SEPARATE SHEET
SERVICE NOTES AND PRECAUTIONS
SERVICE NOTES
1. Make sure that the power lead is connected properly to
power source, otherwise damage to radio may result. If a
battery eliminator is used as a power source in place of a
battery, it must be filtered and regulated. (The power supply capacity should be more than 5 amps.)
2. Integrated circuits (ICs) are used in this unit. Because the
ICs are direc-coupled devices, as to all electronic equipment, reading within 10% of the indicated values are acceptable. Allowance must also be made for variations in
supply voltage. It is expected that any breakdown within
the IC results in drastic changes of the operating voltages
at the terminals.
3. When replacing a power output IC, remember to use the
IC specified in the parts list; Coat the IC-fin with sillicon
grease.
WARNING
ln using meters, signal generator and any tool in servicing
Ics, extreme care is needed. DO NOT SHORT THE IC TERMINALS TO THE PATTERN ON THE PC BOARD OR TO
EACH OTHER. THE IC WILL BE INSTANTANEOUSLY DESTROYED.
ALIGNMENT PROCEDURE
Alignment is performed at factory with laboratory equipment.
Therefore, before alignment is attempted, the unit should be
thoroughly checked for circuit troubles.
NOTES:
1. Check for specified source voltage-DC, 14.4volts.
2. Connect an AC voltmeter (AC VM) across speaker or
dummy load (4 ohms. 20W , wirewound resistor)...see Fig.
1-3. (ELECTRICAL ADJUSTMENTS)
3. Signal input must be kept as low as possible to avoid overload and clipping (use highest sensitivity of output indicator).
4. Repeat adjustment to ensure good results.
5. Non-metallic alignment tools must be used (especially at
FM alignment).
6. For alignment location details, refer to CIRCUIT BOARD
PARTS LOCATION.
INSTALLATION PROCEDURE
1. To prevent a short circuit, remove the key from the ignition and disconnect the
2. Make the proper input and output wire connections for
each unit.
3. Connect the wiring harness wires in the following order:
ground, speakers, battery, ignition.
4. Connect the wiring harness connector to the unit.
5. Install the unit in your car.
6. Reconnect the
7. Disinstall by reversing the installation procedure.
battery.
battery.
CAUTI0N
• The rear-panel which also heatsink is very hot. Don’t burn!!
• If your car’s ignition does not have an ACC position, connect the ignition wires to a power source that can be turned
on and off with the ignition key . If you connect the ignition
wire to a power source with a constant voltage supply, as
with battery wires, the battery may die.
• If the console has a lid, make sure to install the unit so
that the cover will not hit the lid when closing and opening.
• If the fuse blows, first make sure the wires aren’t touching
to cause a short circuit, then replace the old fuse with one
with the same rating.
• Do not let unconnected wires or terminals touch metal on
the car or anything else conducting electricity. To prevent
a short circuit, do not remove the caps on the ends of the
unconnected wires or the terminals.
• Connect the speaker wires correclly to the terminals to
which they correspond. The unit may be damaged or fail
to work if you share the
metal part in the car.
• After the unit is installed, check whether the brake lamps,
blinkers, wipers, etc. on the car are working properly.
• Insulate unconnected wires with vinyl tape or other similar material .
wires or ground them to any
— 1 —
DUMMY BOX SCHEMATIC
ELECTRICAL ADJUSTMENTS
(FOR FXR-725GD)
AM S.G.
(50Ω)
CO-AX CABLE
33Ω 15PF
60PF
PLUG TO FIT ANTENNA
RECEPTACLE OF UNIT
METAL SHIELD CAN
FM S.G.
(50Ω)
CO-AX CABLE
10Ω45Ω
60Ω
PLUG TO FIT ANTENNA
RECEPTACLE OF UNIT
METAL SHIELD CAN
AM DUMMY ANTENNAFM DUMMY ANTENNA
Fig. 1-1Fig. 1-2
4Ω 20W
LEFT CHANNEL OUTPUT
UNIT
RIGHT CHANNEL OUTPUT
4Ω 20W
L
R
L
R
AC V.T.V.M. OR SCOPE
DUMMY LOAD & SWITCH BOX (FOR STEREO UNIT)
Fig. 1-3
ALIGNMENT OF AM RF & lF SECTI0N
Set the radio for AM reception. AM signal generator should be coupled with antenna receptacle through dummy (see Fig.1-1).
Set VOLUME control to maximum and TONE to center. Attenuate signal generator output to maintain 0.5 watts (1.4 volts across
4 ohms load) on AC voltmeter.
VTVM
DISTORTION METER
AC VOLTMETER
T.P
SET
(See Fig. 1.3)
DUMMY
LOAD &
SW BOX
FM SG
&
STEREO SG
(See Fig. 1.2)
FM
DUMMY
ANTENNA
Fig. 2 * SG frequency should be as accurate as possible.
For RADIO DIAL SETTING in the table below , settings marked are for the (10 kHz step) mode and those marked are for the
(9 kHz step) mode.
STEP
1
2
3
4
GENERATOR
FREQUENCY
Non-Mod.
Non-Mod.
1000kHz, 999kHz
612kHz
400Hz, 30% MOD
SG att: Less than 17dB
610kHz, 612kHz
400Hz, 30% MOD
SG att: 17dB
RADIO DIAL
SETTING
530kHz
531kHz
1710kHz
1602kHz
1000kHz
999kHz
612kHz
610kHz
612kHz
OUTPUT
INDICATOR
DC VTVM to test
VT
point
DC VTVM to test
VT
point
AC VTVM across
speaker(L or R) or 4
ohms load
AC VTVM across
speaker(L or R) or 4
ohms load
ADJUST-
MENT
L134
AM OSC
—
L152
AM IF
L133
AM RF
REMARKS
Adjust for 1.4V. (TYP)
Check the voltage less than 7.5V.
Adjust for Maximum Level.
Adjust for Maximum Level.
— 2 —
ALIGNMENT OF FM RF & IF SECTION
Set the radio for FM reception. FM signal generator should be coupled with antenna receptacle, through dummy (see Fig.1-2).
FM SG
&
STEREO SG
VTVM
(See Fig. 1.2)
FM
DUMMY
ANTENNA
T.P
SET
(See Fig. 1.3)
DUMMY
LOAD &
SW BOX
DISTORTION METER
AC VOLTMETER
Fig. 3 * SG frequency should be as accurate as possible.
For RADIO DIAL SETTING in the table below, settings marked are for the (200 kHz step) mode and those marked are for
the (50 kHz step) mode.
In steps 1 to7, no mark frequency means that is common for both (200 kHz step) and (50 kHz step) mode.
Set the radio for AM reception. AM signal generator should be coupled with antenna receptacle through dummy (see Fig.5-1).
Set VOLUME control to maximum and TONE to center. Attenuate signal generator output to maintain 0.5 watts (1.4 volts across
4 ohms load) on AC voltmeter.
VTVM
DISTORTION METER
AC VOLTMETER
FM SG
&
STEREO SG
(See Fig. 1.2)
FM
DUMMY
ANTENNA
T.P
SET
(See Fig. 1.3)
DUMMY
LOAD &
SW BOX
Fig. 6 * SG frequency should be as accurate as possible.
— 5 —
STEP
GENERATOR
FREQUENCY
RADIO DIAL
SETTING
OUTPUT
INDICATOR
ADJUST-
MENT
REMARKS
1
Non-Mod.
2
Non-Mod.
3
1000kHz, 999kHz
400Hz
30% MOD
SG att: 20dBµ
4
1000kHz, 999kHz
400Hz
30% MOD
SG att: 30dBµ
530kHz
531kHz
1710kHz
1602kHz
1000kHz
999kHz
1000kHz
999kHz
TEST MODE
DC VTVM to test
VT
point
DC VTVM to test
VT
point
AC VTVM across
speaker(L or R) or 4
ohms load
Adjust so that the
“ST” mark of LCD
Display appears
—
—
L108
AM IF
L111
AM IFT2
R124
AM SD
Check the voltage more than 2.5V.
Check the voltage less than 7.5V.
Adjust for Maximum Level.
Sensitivity of the seeking frequency.
SETTING UP TEST MODE AT STEP 4 - SEE PAGE 9
ALIGNMENT OF FM RF & IF SECTION
Set the radio for FM reception. FM signal generator should be coupled with antenna receptacle, through dummy (see Fig.5-2).
FM SG
&
STEREO SG
VTVM
(See Fig. 1.2)
FM
DUMMY
ANTENNA
DISTORTION METER
AC VOLTMETER
T.P
SET
(See Fig. 1.3)
DUMMY
LOAD &
SW BOX
Fig. 7 * SG frequency should be as accurate as possible.
— 6 —
STEP
GENERATOR
FREQUENCY
RADIO DIAL
SETTING
OUTPUT
INDICATOR
ADJUST-
MENT
REMARKS
1
2
3
4
5
6
7
7’
RDS
Non-Mod.
Non-Mod.
98.1MHz
1kHz, 22.5kHz dev.
SG att:66dBµ(1mV)
98.1MHz
1kHz, 22.5kHz dev .
SG att:6dBµ
98.1MHz
SG att:6dBµ
87.5MHz
107.9 (108) MHz
SG att:6dBµ
98.1MHz
SG att:25dBµ
98.1MHz
1kHz, 22.5kHz dev .
SG att:33dBµ
87.5MHz
107.9MHz
108MHz
98.1MHz
98.1MHz
98.1MHz
87.5MHz
107.9 (108.0 ) MHz
98.1MHz
TEST MODE
98.1MHz
TEST MODE
DC VTVM to test
VT
point
DC VTVM to test
VT
point
AC VTVM to test
VT
point
AC VTVM across
speaker or 4 ohms
load
AC VTVM across
speaker or 4 ohms
load
AC VTVM across
speaker or 4 ohms
load
Adjust so that the
“ST” mark of LCD
Display appears
Adjust like to
appear for 0.95 of
LCD Display
—
L103
FM OSC
L110
FM DET
L107
FM MIX
L100
FM ANT
L102
FM RF
L100
FM ANT
L102
FM RF
R129
FM SD
R204
Check the voltage more than 1.1V
Adjust for 6.9 ± 0.1V.
NULL VOLTAGE to become
—20±20mV
Adjust for Maximum Level.
Adjust for Maximum Level.
Check for SPEC.
Sensitivity of the seeking frequency.
Sensitivity of the S meter.
SETTING UP TEST MODE AT STEP 7 - SEE PAGE 10
ALIGNMENT OF FM MULTIPLEX SECTION
FM signal generator should be modulated by FM stereo signal generator.
Modulation level:19kHz 10% (7.5kHz dev)
1000Hz 30% (22.5kHz dev)
FM signal generator output level:66dBµ (1mV)
Frequency:98.1 MHz.
STEP
1
2
3
MODULATION
FREQUENCY
19kHz & 1000Hz
(Left Channel)
SG att:66dBµ
19kHz & 1000Hz
(Right Channel)
19kHz & 1000Hz
(Left Channel)
SG att:47dBµ
OUTPUT INDICATOR
AC VTVM across Right speaker or
Right channel load
AC VTVM through Left speaker or
Left channel load
AC VTVM across Right speaker or
Right channel load
Set the radio for FM reception and tune to signal. Adjust volume control to provide 0.5 watt on AC VTVM and tone to
center. Set L/R balance control for equal output at each channel.
ADJUST-
MENT
R137
R137
R156
Adjust for minimum.
Check for minimum.
Adjust for 20dB Separation.
REMARKS
— 7 —
ELECTRICAL ADJUSTMENTS
FOR FXR-725GD, FXR-730GD FXC-750GD
SETTING UP TEST MODE AT STEP 4 FOR AM & STEP 7 FOR FM
Press the e
the mode to the test mode shown in Step 4 for AM and Step 7 for FM.
PWR
button to turn the power off. Next, use the following procedure with the front panel switches to set
VOL
REL
PWR
TUN
TRK
CD CHANGER CONTROL
HI-POWER 40W x 4 FXC-750GD
AUD
BAND/ATP
CDC
+
-
DISC
SCANRM/
RPTSHF
LD
LO
/DX
qwer
Fig. 5
1. While the power is off, press the q
to enable the w
BAND
button to be used at the moment the power comes on.
2. If the above operation is successful all the figures on the LCD light up, check that you have entered test mode. Fig. 6 (A).
3. Press the r
AUD
button once. The display shown in Fig. 6 (B) appears on the LCD and the unit enters DX mode.
Then, while receiving FM 98.1MHz rotate the Semi-fixed VR R129 on the TUNER UNIT (RF33) to adjust the LCD until the
stereo mark light “
4. Press the r
ST
” is on. Fig. 6 (B').
AUD
button, if the display changes to that shown in Fig. 6 (C) the unit is in Local mode. Check that the “
mark is displayed (for specific: Input level is 12~28dB higher than that of the DX mode).
5. Press the w
6. Then press the r
BAND
button, if the display changes to that shown in Fig. 6 (D) or (D') receiving AM1000 kHz or *(999) kHz.
AUD
button, if the display changes to that shown in Fig. 6 (E) the unit is in DX mode. Rotate the Semi-
fixed VR R124 on the TUNER UNIT (RF33) to adjust the LCD until “
7. Then press the r
AUD
button, if the display changes to that shown in Fig. 6 (F) the unit is in Local mode. Check that the “ST”
mark is displayed. (for specific: Input level is 12~28dB higher than that of DX mode).
8. Turn off the power to release the test mode.
PRESET1
button. Then press the w
ST
BAND
button and e
” mark lights up.
PWR
button simultaneously
ST
”
TEST MODE CHART
(A) Enter the Test Mode
(B) FM DX Mode
(B’)OK
(C) FM Local Mode OK
(D) Receiving 1000kHz
(D’) Receiving 999kHz
(E) AM DX Mode
(F) AM Local Mode
Fig. 6
— 8 —
(E’)OK
ELECTRICAL ADJUSTMENTS
FOR FXC-755RDS
TEST MODE CHART
(A) Enter the Test Mode
(B) Enter the FM Mode
(C) FM DX Mode
REL
VOL
TUN
TRK
CD
PWR
(D) Receiving 98.1 MHz
(E) FM Local Mode
CD CHANGER CONTROL
HI-POWER 40W x 4 FXC-755RDS
AUD
Fig. 7
BAND/ATP
TA/AF
+
-
DISC
SCANRM/
RPTSHF
qw tyer
(F) Enter the AM Mode
(G) AM DX Mode
PTY
REG
Fig. 8
1. While the power is off, press the q
PRESET1
button. Then keep pressing the w
BAND
button, press the e
simultaneously . All the figures on the LCD lights up Fig. 8 (A) enter the test mode.
2. Press the r
AUD
button after step 1, the unit enters FM seek adjustment mode of the DX mode. Fig. 8 (C) Rotate the R129
on the PC Board Ass’y (RF33R) to adjust the LCD until the STEREO indicator lights up Fig. 8 (D).
AUD
3. Press the r
button again after step 2, the unit enters the LOCAL mode. Check that the STEREO indicator is displayed
(for specific: Input level of signal Generator is 12~28dB higher than that of the DX mode). Fig. 8 (E)
4. By pressing the w
5. Press the r
BAND
button in the steps 1 to 3 enters the unit to the AM mode. Fig. 8 (F)
AUD
button, the unit enters SEEK adjustment mode of the DX mode. Fig. 8 (G)
Rotate the R124 on the PC Board Ass’y (RF33R) to adjust the LCD until the STEREO indicator lights up.
AUD
6. Pressing the r
button again after the step 5, the unit enters the LOCAL mode. Check that the STEREO indicator is
displayed (for specific: Input level of Signal Generator is 12~28dB higher than that of the DX mode). Fig. 9 (I)
PWR
button
— 9 —
(H) Receiving 999 kHz(K) The moment TP ON(N) Change the Display while AF ON
(I) AM Local Mode
(J) S. Meter Adj. Mode
(L) Change the Display while TP ON
(M) The Moment AF ON
Fig. 9
7. Press the t
TA/AF
button in the step 1, the unit enters the S meter adjustment mode. Rotate the R204 on Main PCB to adjust the LCD
until the 0.95 lights up Fig. 9 (J)
8. e
9. e
POWER
POWER
OFF and ON. Release the test mode.
ON and press the y
PRESET 5
.
SG 98.1 MHz, MOD. 75 kHz, INT MOD. EXT, att 66dBµ
RDS 1.0%, MOD. 30% 1 kHz, MONO, RDS ON, TP ON, SK OFF, BK OFF.
10. Confirm the “
TP
” indicator on the LCD lights up.
Fig. 9 (K) 씮 (L) soon. So RDS ON Sensitivity is OK.
11 . Press the q
12. Press the t
PRESET 1
T A/AF
button for more than 2 seconds. (Memorize the RDS).
button for more than 2 seconds and confirm the “
SG 107.1 MHz, MOD. 75 kHz, INT MOD. EXT, att 66dBµ
RDS 1.6%, MOD. 30% 1kHz, MONO, RDS ON, TP ON, SK OFF, BK OFF.
13. Press the q
PRESET 1
button. Confirm the receiving 107.1 MHz automatically. So the LCD indicator displays Fig. 9 (O) 씮 (P) .
(O) The Moment 107.1MHz Receiving
Change the Display while 107.1MHz Receiving
(P)
AF
” indicator on the LCD lights up. Fig. 9 (M) 씮 (N) soon.
ALIGNMENT OF CASSETTE PLAYER
See the wow/flutter meter for JIS/WRMS function.
(See Fig. 1.3)
DUMMY
LOAD &
SW BOX
TEST TAPE
MTT-257E
MTT-111N
(3kHz)
MTT-111N
(3kHz)
STEP
1
2
3
SET
MODULATION
FREQUENCY
Head Azimuth
Wow/Flutter
Tape Speed
AC VOLTMETER
Fig. 4
OUTPUT
INDICATOR
VOLTMETER
Wow/Flutter Meter
Tape Speed Drift
Meter
WOW/FLUTTER METER
(with drift meter)
REMARKS
Align azimuth (on Head) for maximum
output 10 kHz as well as baiance on 1 kHz
between Left and Right channel output.
* When repairing any of the numerous precision parts in the cassette deck mechanism, a high degree of skill is necessory and
the cost of parts may not necessarily be cheaper than for the whole mechanism.
In addition, parts from the deck mechanism exploded view and parts list are only for technical reference. These parts may or
may not be individually available.
— 14 —
CABINET & CHASSIS EXPLODED VIEW
(FXR-725GD)
e
q
!4
!5
!6
r
!0
!8
A
!1
!0
!7
!2
!8
!8
@2
B
!2
!0
!0
!8
@1
u
!1
!8
A
B
!9
!1
o
!2
!1
!2
!2
t
@3
SCREW KIT (6PCS)
TK29X12210
!3
i
!3
BKT (REL)
TK21176780
@0
CABLE ASS'Y
(FOR FXR-725GD/XE)
TK26917002
(FOR FXR-725GD/SS, A.SS)
TK26917170
BRACKET (MOUNT)
TK21176533
y
i
@1
@2
SUPPORT BKT
TK2102013
— 15 —
CABINET & CHASSIS EXPLODED VIEW
(FXR-730GD/ASS, FXC-750GD/ASS, FXC-755RDS/XE)
e
q
!4
!5
!6
r
!0
!8
A
!1
!7
!2
!0
!8
!8
@2
B
!2
!0
!0
!8
@1
u
!8
!1
A
B
!9
!1
o
!2
!1
!2
!2
w
!2
t
@3
SCREW KIT (6PCS)
TK29X12210
!3
i
!3
BKT (REL)
TK21176780
!3
— 16 —
@0
CABLE ASS'Y
(For FXR-730GD/A.SS,
FXC-750GD/A.SS)
TK26917170
(For FXC-755RDS/XE)
TK26917280
BRACKET (MOUNT)
TK21176533
y
i
@1
@2
SUPPORT BKT
TK2102013
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