10
KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY
KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G
ADJUSTMENT
[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
1. IC10 (TDA7513T) -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.
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)
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
: S-METER-Check Land
(PWB Side B, around W572)
Adjustment Coil
: 1st IFT = L508 / 2nd IFT = 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
AM
999kHz
OFF
35dBuEMF
(B),(C)
q
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.
w
By the above-mentioned adjustment method, same ad-
justment is performed to both sides (1st & 2nd MIX 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)
q
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.
w
By the above-mentioned adjustment method, same ad-
justment is performed to both sides (ANT & RF Coil).
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 press-
ing 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.