Tuner Adjustment - Sanyo MCD-UB575M Service Manual

TUNER ADJUSTMENTS
Use a plastic screw driver for adjustments.
Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter.
Set of unit
:
Supply voltage DC 12.0V
:
speaker impedance 8 ohms
:
standard output 50 mW
:
Function switch RADIO
a. Parts Location
a.AM Adjustment
Adjusting
Step
Circuit
Closed the output
termial by sweep
1 IF
generator,it place
2 Tuning Connect AM SG to
3 coverage
4 Tracking Connect AM SG to
5
b.FM Adjustment
Adjusting
Step
Circuit
Connect sweep
1 IF
IC101(24)pin (B)
Tuning
2 Connect FM SG to
coverage
3 FM.ANT & D101(-)
Tracking
4 Connect FM SG to
5 FM.ANT & D101(-)
Band switch:MW
Connections
Input Output
Connect sweep
generator to
IC101(18) PIN(A)
to MW ANT
Connect VTVM to
test loop speaker terminals.
Connect VTVM to
test loop speaker terminals.
Band switch:FM
Connection
Input Output
Connect VTVM to
generator to
generator to IC101
(18) pin (A)
Connect VTVM to
speaker terminals.
Connect VTVM to
speaker terminals.
SG Position of
Frequency Tuning dial
465 KHz Low
520 KHz Low end
1650 KHz High end
600 KHz 600 KHz
1400 KHz 1400 KHz
FM Dummy antenna: 75 ohms unbalance
SG Position of
Frequency Tuning dial
10.7 MHz Low
87.5 MHz Low end
108.3 MHz High end
90.0 MHz 90.0 MHz
106.0 MHz 106.0 MHz
- 2 -
VTVM
Adjustment
Oscilloscope
T103
T101 Max.
C3
MW ANT COIL Max.
C4
VTVM
Adjustment
Oscilloscope
T102 T104
L102 Max.
C1
L101 Max.
C2