Tuner Adjustments - Sanyo MCD-ZX300 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 12V
Speaker : 4 ohms
Standard output : 50 mW (450 mV)
Function switch : RADIO
PARTS LOCATION
1. AM ADJUSTMENT
S t e p Adjusting
Circuit I n p u t
Closed the output
1 IF terminal by sweep
generator, it place
to MW ANT.
2
Tuning Connect AM SG to
3 coverage TEST LOOP.
4
Tracking Connect AM SG to
5 TEST LOOP.
2. FM ADJUSTMENT
S t e p Adjusting
Circuit
Connect sweep
generator to
IF
1
IC101 (24pin)
and C107(E)
2
Tuning Connect FM SG to
3 coverage FM ANT (H) & FM (E).
4
Tracking Connect FM SG to
5 FM ANT (H) & FM (E).
This is a basic adjustment.
Band switch : MW
Connection
O u t p u t
Connect sweep
generator to
IC101(19(H)) and
C107(E).
Connect VTVM to
speaker terminals.
Connect VTVM to
speaker terminals.
Band switch : FM
Connection
I n p u t Output
Connect VTVM
generator to
IC101 (19PIN)
and C1075 (E).
Connect VTVM to
speaker terminals.
Connect VTVM to
speaker terminals.
S G Position of
Frequency tuning dial
465 kHz Low
515 kHz Low end
1640 kHz High end
600 kHz 600 kHz
1400 kHz 1400 kHz
FM Dummy antenna : 75 ohms unbalance
S G Position of
Frequency tuning dial
10.7MHz Low
87MHz Low end
109MHz High end
90.0MHz 90.0MHz
106.0MHz 106.0MHz
- 2 -
Adjust- V T V M
ment Oscilloscope
T103
T101
Max.
VC103
MW COIL
Max.
V104
Adjust- V T V M
ment Oscilloscope
T104 and
T102
L102
Max.
VC101
L101
Max.
VC102