Sanyo MCD-ZX300 - Tuner Adjustments

- 2 -
T103
T102 JW106 T101
T104
IC101
JW105
L101
VC102
VC103
L102
VC104
VC103
FM ANT
FM (E)
MW ANT
1. AM ADJUSTMENT Band switch : MW
Step Adjusting Connection S G Position of Adjust- VTVM
Circuit Input Output Frequency tuning dial ment Oscilloscope
Closed the output Connect sweep
1IFterminal by sweep generator to 465 kHz Low T103
g
enerator
,
it
p
lace IC101
(
19
(
H
))
and
to MW ANT. C107
(
E
)
.
2 515 kHz Low end T101
Tuning Connect AM SG to Connect VTVM to Max.
3 coverage TEST LOOP. speaker terminals. 1640 kHz High end VC103
4 600 kHz 600 kHz MW COIL
Tracking Connect AM SG to Connect VTVM to Max.
5 TEST LOOP. speaker terminals. 1400 kHz 1400 kHz V104
• 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
TUNER ADJUSTMENTS
This is a basic adjustment.
2. FM ADJUSTMENT Band switch : FM FM Dummy antenna : 75 ohms unbalance
Step Adjusting Connection S G Position of Adjust- VTVM
Circuit Input Output Frequency tuning dial ment Oscilloscope
T104 and
1
IF
10.7MHz Low
T102
2 87MHz Low end L102
Tuning Connect FM SG to Connect VTVM to Max.
3 coverage FM ANT (H) & FM (E). speaker terminals. 109MHz High end VC101
4 90.0MHz 90.0MHz L101
Tracking Connect FM SG to Connect VTVM to Max.
5 FM ANT (H) & FM (E). speaker terminals. 106.0MHz 106.0MHz VC102
Connect sweep
generator to
IC101 (24pin)
and C107
(
E
)
Connect VTVM
generator to
IC101 (19PIN)
and C1075
(
E
)
.