Kenwood KDC-1023S, Service Manual

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KDC-1023/1023S/122/122S
ADJUSTMENT
8
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 : Vt-Check Land
(PWB Side_B, around D506)
Adjustment Coil : L507 (VCO Coil)
The adjustment method : VCO coil is turned and adjusted
according to the following tables.
M : AM Adjustment
For Your Information : The frequency of SET is only set up by
Pre-Set-Key in case this adjustment
①
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.
➁
By the above-mentioned adjustment method, same adjustment
is performed to both sides (1st&2nd MIX Coil).
TYPE Mode freq. Voltage Fig
E/M AM 1611kHz 5.5
±
0.1(V) (C)
K AM 1700kHz 5.8
±
0.1(V) (C)
J FM 90.0MHz 5.6
±
0.1(V) (C)
W(Wide Band) FM 108.0MHz 7.2
±
0.1(V) (C)
1-2. Adjustment of 1st & 2nd-MIX Coil
Voltage Check Point : S_METER-Check Land
(PWB Side_B, around W572)
Adjustment Coil : 1stIFT = L508 / 2ndIFT = L509
Setting of Signal Generator : Refer to the following tables
TYPE MODE freq. Mod. ANT Input Fig
K AM 1000kHz OFF 35dBuEMF (B),(C)
E,M,J,W AM 999kHz OFF 35dBuEMF (B),(C)
①
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.
➁
By the above-mentioned adjustment method, same adjustment
is performed to both sides (ANT&RF Coil).
1-3. Adjustment of FM_ANT&RF Coil
Voltage Check Point : S_METER-Check Land (PWB
Side_B, around W572)
Adjustment Coil : ANT_Coil = L505
RF_Coil = L506
Setting of Signal Generator : Refer to the following tables.
TYPE MODE freq. Mod. ANT Input Fig
E/M FM 87.5MHz OFF 5 or 11dBuEMF (A),(C)
K FM 87.9MHz OFF 5 or 11dBuEMF (A),(C)
J FM 76.0MHz OFF 5 or 11dBuEMF (A),(C)
W(Wide Band) FM 65.0MHz OFF 5 or 11dBuEMF (A),(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.
(Writing adjustment valve to the EEPROM.)
Effect of adjustment is in cofirmation of adjustment status at
[ PRESET 4 ] key.
• Display of [ PRESET 4 ]
Adjustment "OK" : 14seg model "E2P OK" 7seg model "EPO"
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.
[Fig.3]
(UNDER VIEW)
[Fig.2]
[Fig.1]
(OVER VIEW)
(REAR VIEW)
(TUNER ANT)
(A)
(B)
S-METER
Check Land
IC10
Vt
Check Land
FM-SG
AM-SG
L509
L508
L507
L506
L505
(C) DC Voltmeter