Kenwood KDCC 469 Service Manual

Page 9

KDC-C469/Y/FM/FMA
KDC-0669/Y
ADJUSTMENT

0 RF MODULATOR UNIT 0 L.P.$. initial position adjustment procedure

1. DC balance adjustment (VFl301) 1. Connect the changer to the HEAD UNIT (H/U).

While observing the waveform with an oscilloscope at pin 2. While holding the magazine eject button of the changer,
13 of l0301, adjust VFt301 to minimize the waveform level. press the reset button of the H/U.

2. PLL control voltage adjustment (V0301) 3. After about 3 seconds, release the magazine eject button.
First set the transmission frequency to *87.9MHz with the 4. Press the SRC button of the H/U to enter the CD-OH mode,
commander, then adjust VC301 so that the DC Voltage at and the H/U's display section indicates E-88".
the + pole of C317, measured using a multi-meter or digital 5. Move the mechanism deck to around the 1st stage by press-
tester, is +3V:0.1V). ing the DISC- or DISC+ button.

* NOTE : E type is 87.7MHz. 8. Insert the adjustment tool (W05-0635-00) into the tool hole

3. Modulation level adjustment (VFl303) on the changer mechanism.

The method uses a standard receiver or tuner. 7. Then press the DISC+ button to move the mechanism deck

Adjust VFl303 so that the output level from the standard until the mechanisms slider hits the adjustment tool.

receiver or tuner is as specified. 8. When the motor locks (stops), press the REPEAT key of
the H/U.

When the REPEAT key is pressed, the mechanism moves
automatically to the 1st stage and the initial position adjust-
ment completes. (The data is written in the EEPROM at

I I
' |
' |
| . .
| thls time.)
: |
I I
' |
' |

O Caution : Note on ICS (EEPROM)
Be sure to use the W05-O869-00 when replacing the
EEPROM. IC8 stores the digital servo data of the pickup
servo.
Therefore, if the EEPROM does not store servo data, ER-
ROR76 (E-76) will indicate the H/Us display section at the
moment CD is played.