ONKYO CD RECEIVER CR-305X User Manual
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CD ADJUSTMENT PROCEDURES
CLOCK ADJUSTMENT PROCEDURES
Preparation
Set the trimming resistors R123 to center.
Focus gain adjustment
1. Set the output of the audio oscillator to 1 kHz and 1
∼1.5 VP-P
2. Connect the oscilloscope and audio oscillator as shown below. (Refer to Fig-1)
3. Load the test disc YEDS-18 on the tray and play the track 2.
4. Adjust the trimming resistor R123 so the signal of channel 2 on the oscilloscope becomes 1.25 times of channel 1.
3. Load the test disc YEDS-18 on the tray and play the track 2.
4. Adjust the trimming resistor R123 so the signal of channel 2 on the oscilloscope becomes 1.25 times of channel 1.
(Refer to Fig-2)
5. Remove the oscilloscope and audio oscillator.
P105
R123
F-GAIN
TEST POINT
P104
Trimming resistor R123
Audio oscillator
+
GND
Oscilloscope
ch 2 GND
ch 1
GND
1
2
RF
VC
1
4
3
2
FE1
FE2
TE1
TE2
Test point
P105
Test point
P104
Fig-1
Fig-2
* The adjustment of focus offset adjustment is unnecessary.
F
reqency counter
1. Connect the frequency counter to the terminal TP01 on main PC board (NAAR-6875)
2. Press and hold down the MEMORY button , then press the DISPLAY button.
(All segments on FL tube light on)
3. Adjust the trimmer capacitor C703 so that the reading of frequency counter becomes 524.288 kHz 1Hz.
2. Press and hold down the MEMORY button , then press the DISPLAY button.
(All segments on FL tube light on)
3. Adjust the trimmer capacitor C703 so that the reading of frequency counter becomes 524.288 kHz 1Hz.
C703
TP01
FREQCAL
524,287 524,289 Hz
Trimmer capacitor C703
S T
STEREO
MUTING
MIN
kHz
MHz
MONO
AUTO
TRACK
TIMER
W.DAY
W.END
REC
SLEEP
W.DAY
W.END
REC
SLEEP
C D
MEMORY
REPEAT
RANDOM
REPEAT
RANDOM
RDS
PM
AM
S.BASS
DIRECT
DIRECT
Display
CR-305X