Ic10 (Tda7513) -The Tuner Adjustment Method - Kenwood KDC-3023R Service Manual

KDC-3023R,4024/V/Y/YV
QQ
3 7 63 1515 0

1. IC10 (TDA7513) -The Tuner adjustment method

• When IC10 and its circumference are fixed, according to the
following order, it readjusts if needed.
• The adjustment item changes with parts to exchange. Please
refer to "Parts vs Adjustment item table".
1-1. VCO Coil Adjustment -- Adjustment of Tunning Voltage
Voltage Check Point
Adjustment Coil
The adjustment method
TYPE Mode
E/M AM
K AM
J FM
W(Wide Band) FM
M : AM Adjustment
For Your Information : The frequency of SET is only set up by
Pre-Set-Key in case this adjustment
1-2. Adjustment of 1st & 2nd-MIX Coil
Voltage Check Point
Adjustment Coil
TE
L 13942296513
Setting of Signal Generator : Refer to the following tables
TYPE MODE freq.
K AM 1000kHz
E,M,J,W AM 999kHz
The appearance and the coil with which S-METER DC voltage
serves as the maximum are turned and adjusted
in the above-mentioned SG input.
By the above-mentioned adjustment method, same adjustment
is performed to both sides (1st&2nd MIX Coil).
( REAR VIEW )
[Fig.1]
L505
L506
www
L507
L508
.
L509
( OVER VIEW )
[Fig.2]
8
ADJUSTMENT
: Vt-Check Land
(PWB Side_B, around D506)
: L507 (VCO Coil)
: VCO coil is turned and adjusted
according to the following tables.
freq. Voltage
5.5 ± 0.1(V)
1611kHz
5.8 ± 0.1(V)
1700kHz
5.6 ± 0.1(V)
90.0MHz
7.2 ± 0.1(V)
108.0MHz
: S_METER-Check Land
(PWB Side_B, around W572)
: 1stIFT = L508 / 2ndIFT = L509
Mod. ANT Input
OFF 35dBuEMF
OFF 35dBuEMF
( TUNER ANT )
FM-SG
AM-SG
x ao
y
i
8
1-3. Adjustment of FM_ANT&RF Coil
Voltage Check Point
Adjustment Coil
Setting of Signal Generator : Refer to the following tables.
TYPE MODE
E/M FM
K FM
J FM
W(Wide Band) FM
The appearance and the coil with which S-METER DC voltage
Fig
serves as the maximum are turned and adjusted
(C)
in the above-mentioned SG input.
(C)
By the above-mentioned adjustment method, same adjustment
(C)
is performed to both sides (ANT&RF Coil).
(C)
1-4. Adjustment of STEREO (adjustment of 456k-VCO)
Adjust in TEST_MODE
• How to enter the test mode
While pressing on [ FM ] and [ PRESET 6 ] keys, reset the
unit.
• Adjustment method
Complete on condition that show "ALL OFF" when pressing
on [ PRESET 1 ] and [ PRESET 6 ] keys.
Q Q
3 6 7 1 3
(Writing adjustment valve to the EEPROM.)
Effect of adjustment is in cofirmation of adjustment status at
Fig
[ PRESET 4 ] key.
(B),(C)
• Display of [ PRESET 4 ]
(B),(C)
Adjustment "OK" : 14seg model "E2P OK"
Adjustment "NG" : 14seg model "E2P ERR" 7seg model "EPE"
• Releasing the test mode
Reset mode only.
ACC off, Power off, Power down and Remove the panel
mode is not releasing.
( A )
( B )
u163
.
( UNDER VIEW )
2 9 9 4 2 8
: S_METER-Check Land (PWB
Side_B, around W572)
: ANT_Coil = L505
RF_Coil = L506
freq. Mod. ANT Input
87.5MHz OFF 5 or 11dBuEMF
87.9MHz OFF 5 or 11dBuEMF
76.0MHz OFF 5 or 11dBuEMF
65.0MHz OFF 5 or 11dBuEMF
1 5 0 5 8 2 9 9 4
7seg model "EPO"
m ( C ) DC Voltmeter
Vt
Check Land
co
IC10
S-METER
Check Land
[Fig.3]
9 9
Fig
(A),(C)
(A),(C)
(A),(C)
(A),(C)
2 8 9 9