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Tuner Adjustments - Sanyo MCD-ZX300 Service Manual

Cd portable radio cassette recorder
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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

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