Tuner Adjustment - Sanyo MCD-ZX500F 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
terminal by sweep
IF
1
generator,it place
to MW ANT
2 Tuning Connect AM SG to
coverage test loop
3
Connect AM SG to
4
Tracking
test loop
5
b. FM Adjustment
Adjusting
Step
Circuit
Connect sweep
1 IF generator to IC101
IC101(22)pin (E)
2 Tuning Connect FM SG to
3 coverage FM ANT(A) & D102(B)
4 Connect FM SG to
Tracking
FM ANT(A) &D102(B)
5
T103 T102
C107(E)
Band switch : MW
Connections
lnput Output
Connect sweep
generator to IC101(19)
(H) and C107(E)
Connect VTVM to
speaker terminals.
Connect VTVM to
speaker terminals
Band switch : FM
Connection
Input Output
Connect VTVM to
generator to (19)PIN
IC101(H) and C115(E)
Connect VTVM to
speaker terminals.
Connect VTVM to
speaker terminals.
C2
C4
T101
IC101(19P)(H)
C1 C3
Position of
SG
Tuning dial
Frequency
455KHz
515 KHz Low end
1640 KHz High end
600 KHz 600 KHz
1400 KHz 1400 KHz
FM Dummy antenna : 75 ohms unbalance
position of
SG Frequency
tuning dial
10.7MHz
87MHz Low end
109MHz High end
90 MHz 90 MHz
106.0 MHz 106.0 MHz
- 2 -
Adjustment
Low T103
T101
C3
MW ANT
C4
Adjustment
Low T104 andT102
L102
C1
L101
C2
A
B
VTVM
Oscilloscope
Max.
Max.
Max.
VTVM
Oscilloscope
Max.
Max.