5
OPERATION CHECK
GENERAL SPECIFICATIONS OF SIGNAL
Standard frequency
Signal output
Modulation
FM
MW
LW
FM
MW
LW
MW
FM Stereo
98.1 MHz (87.5, 108 MHz)
1000 kHz (522, 1620 kHz)
200 kHz (144, 288 kHz)
1 mV
5 mV
5 mV
400 Hz 30% MOD.
1 kHz 75 kHz DEV.
90% for L only or
R only pilot level 10%
AF output level
FM/MW/LW
Power source voltage
DC 14.0V (Backup voltage is the same as this)
AF load impedance
4 ohm pure resistance
Balance
Center
position
of
level
Tone
Center
position
The signal strength read in this section is voltage on the antenna.
Test Diagram
FL.
SPK.
FR.
SPE.
BACK UP (14.4V)
GROUND
POWER ANTANNA
MPX
STEREOS
MODULATOR
FM SG
AM SG
DUMMY
ANTANNA
VTVM
VTVM
DISTORTION
METER
ACC (DV14.4V)
SPK.
RR.
SPR.
RL.
MAIN UNIT
4−SPEAKER
4−SPEAKER
2−SPEAKER
FRONT
SPK.
SPK.
FRONT
2−SPEAKER
ANT
Summary of Contents for FXD-680GD
Page 7: ...6 ALIGNMENT LOCATIONS FM TUNER ...
Page 18: ...17 ELECTRICAL ADJUSTMENTS DUMMY BOX SCHEMATIC AM DUMMY ANTENNA FM DUMMY ANTENNA ...
Page 19: ...18 BLOCK DIAGRAM FOR FXD 680GD ...
Page 20: ...19 BLOCK DIAGRAM FOR FXD 685GD ...
Page 21: ...20 IC TRANSISTOR LEAD IDENTIFICATION ...
Page 22: ...21 CD MECHANISM EXPLODED VIEW MECHANSIM 94 01683 10 ...
Page 23: ...22 CABINET CHASSIS EXPLODED VIEW ...
Page 36: ...35 SCHEMATIC DIAGRAM MAIN BOARD FOR FXD 680GD FXD 685GD ...
Page 37: ...36 SCHEMATIC DIAGRAM KEY BOARD FOR FXD 680GD FXD 685GD ...
Page 38: ...37 SCHEMATIC DIAGRAM CD SERVO BOARD FOR FXD 680GD FXD 685GD ...
Page 39: ...38 SCHEMATIC DIAGRAM REMOTE BOARD FOR FXD 680GD FXD 685GD ...
Page 40: ...39 SCHEMATIC BOARD DIAGRAM MAIN FOR FXD 680GD FXD 685GD ...
Page 42: ...41 SCHEMATIC BOARD DIAGRAM CD SERVO FOR FXD 680GD FXD 685GD ...
Page 43: ...42 SCHEMATIC BOARD DIAGRAM REMOTE FOR FXD 680GD FXD 685GD ...
Page 44: ...FXD 680GD FXD 685GD No 1702YI3944 Printed In China issue date 27 04 ...