FR-155
29
+
GND
ch 2 GND
ch 1 GND
1
2
RF
VC
1
4
3
2
FE1
FE2
TE1
TE2
CD ADJUSTMENT PROCEDURES
Preparation
Set the trimming resistors R123 to center.
Focus gain adjustment
1. Set the output of the audio oscillator to 1kHz and 1 1.5Vp-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.
(Refer to Fig-2)
5. Remove the oscilloscope and audio oscillator.
Fig-1
Fig-2
Audio oscillator
Oscilloscope
Test point
P104
Test point
P105
Trimming resistor
R123
Side view
