Electrical Adjustments - Sanyo FXR-725GD Servise Manual

DUMMY BOX SCHEMATIC
AM S.G.
(50Ω)
AM DUMMY ANTENNA
AM RF & lF
ALIGNMENT OF
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.
FM SG
STEREO SG
For RADIO DIAL SETTING in the table below, settings marked
(9 kHz step) mode.
GENERATOR
STEP
FREQUENCY
1 Non-Mod.
2 Non-Mod.
3 1000kHz,
612kHz
400Hz, 30% MOD
SG att: Less than 17dB
4 610kHz, 612kHz
400Hz, 30% MOD
SG att: 17dB

ELECTRICAL ADJUSTMENTS

(FOR FXR-725GD)
PLUG TO FIT ANTENNA
CO-AX CABLE
RECEPTACLE OF UNIT
33Ω 15PF
60PF
METAL SHIELD CAN
Fig. 1-1
LEFT CHANNEL OUTPUT
UNIT
RIGHT CHANNEL OUTPUT
DUMMY LOAD & SWITCH BOX (FOR STEREO UNIT)
SECTI0N
VTVM
(See Fig. 1.2)
FM
DUMMY
&
ANTENNA
RADIO DIAL
SETTING
530kHz DC VTVM to test
531kHz point
1710kHz DC VTVM to test
1602kHz point
999kHz 1000kHz AC VTVM across
999kHz speaker(L or R) or 4
612kHz ohms load
AC VTVM across
610kHz
speaker(L or R) or 4
612kHz
ohms load
CO-AX CABLE
10Ω
FM S.G.
(50Ω)
60Ω
FM DUMMY ANTENNA
L
4Ω 20W
R
AC V.T.V.M. OR SCOPE
L
4Ω 20W R
Fig. 1-3
T.P
SET
Fig. 2 * SG frequency should be as accurate as possible.
are for the (10 kHz step) mode and those marked
OUTPUT ADJUST-
INDICATOR MENT
L134
AM OSC
VT
—
VT
L152
AM IF
L133
AM RF
— 2 —
PLUG TO FIT ANTENNA
RECEPTACLE OF UNIT
45Ω
METAL SHIELD CAN
Fig. 1-2
DISTORTION METER
AC VOLTMETER
(See Fig. 1.3)
DUMMY
LOAD &
SW BOX
REMARKS
Adjust for 1.4V. (TYP)
Check the voltage less than 7.5V.
Adjust for Maximum Level.
Adjust for Maximum Level.
are for the