Tuner Adjustments; Parts Location - Sanyo MCD-Z8F Service Manual

i
TUNER ADJUSTMENTS
Use
a plastic screw driver for adjustments.
. Adjust the intermediate frequency of AIM and FM to the frequency of ceramic filter.
Supply voltage
:DC12.OV
Phones impedance :32
ohm
Standard output :50 mW (450 rmV)
Function switch : RADIO
PARTS LOCATION
J
J2023-
— J2015
TP-I
TP-2
1
VCT-3 VCT-1
L2103
— o lF OUT GND
J2101
IF OUT GND
4$
Adjusting
Step
Connections
Circuit
SG Frequency
Input
Position of tuning dial
output
Closed the oulpul Connect sweep
terminal by sweep generator
to C2106
1 IF
generator, it place to
(H) & 455 kHz Low
L2103. J2101 (G)
2
Tuning
Connect Atvf SG to Connect VTVM to 517 kHz
Low end
3
coverage Test Loop speaker terminals
1750 kHz High end
4
Tracking
Connect AM SG to Connect VTVM to
600 kHz
600 kHz
5
Test Loop
speaker terminals
1400 kHz 1400 kHz
6 I Repeat adjustments
Adjustment
XF213
L2104
VCT -4
L2103
--l
VTVM
Oscilloscope
--4-
b.
FM ADJUSTMENT BAND SELECT SWITCH : Fh
Adjusting Connections
Step
Circuit
Input
output
Connecl sweep
Connecl sweep
1
IF
generalor to generalor 10
IC201 @ (H) C2106 (H)
& TP202 (G)
& J2101 (G)
2
Connect FM SG
Tuning
Connect VTVM to
to TPI (H)
3
coverage
& TP2 (G)
speaker terminals
Connect FM SG
4
Connect VTVM to
Tracking
to TP1 (H)
& TP2 (G)
speaker Iermmals
VCT -3
+
Max.
Max.
5 \
Repeat adjustments
FM Dummy antenna :75 ohm unbalance
SG Frequency Position of tuning dial
Adjustment
VTVM
Oscillosco~e
10.7 MHz
Low
...
n
1
1
1
87.0 MHz Low end L2102
I I
Max.
109.0 MHz High end
VCT-2
98.0 MHz
I
98.0 MHz
\ VCT-I I
MZIX.
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