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CD-BA120/125
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage
Frequency
Frequency
Display
AM IF
450 kHz
1,720 kHz
AM Band
—
530 kHz
Coverage
AM Tracking 990 kHz
990 kHz
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
CD SECTION
• Adjustment
Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
* Focus offset adjustment
* Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing 12-2
EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0dB.)
* Focus gain adjustment
* Tracking gain adjustment
• FM RF
Signal generator: 1 kHz, 22.5 kHz dev., FM modulated
Setting/
Instrument
Adjusting
Connection
Parts
T351
*1
*1. Input: Antenna, Output: TP301
(fL): T306
*2
1.1 ± 0.1 V
*2. Input: Antenna, Output: Speaker terminal
(fL): T303
*1
CNP301
AM LOOP
ANTENNA
1
IC301
R381
T302
TP301
FM IF
T301
FM BAND
COVERAGE fL
T351
AM IF
Figure 12-1 ADJUSTMENT POINT
CD ERROR CODE DESCRIPTION
– 12 –
Test Stage
Frequency Frequency
Display
FM Band
—
87.50 MHz
Coverage
FM RF
98.00 MHz 98.00 MHz
(10-30 dB)
TUNER PWB
T303
AM
TRACKING fL
L312
T306
FM RF
AM BAND
COVERAGE fL
TP302
R357
Error
[Servo System Error]
0001
Cannot detect Pickup-in SW
0002
DSP access error
[Error during close operation]
Open/Close SW Low → High not functioning
0101
Open/Close SW High → Low not functioning
0103
[Error during open operation]
Open/Close SW Low → High not functioning
0201
Open/Close SW High → Low not functioning
0203
[Error during skip operation]
0302
Pickup-in SW is not detected
0306
During Disc 1 search, Open/Close SW or Clamp SW
or Disc SW do not change to low.
Clamp SW Low → High not functioning
0307
Clamp SW High → Low not functioning
0308
T
Stopped
CH1=500mV
CH2=200mV
DC 10:1
DC 10:1
T
FDO
1
TE
3
EFBL
2
=Filter=
=Offset=
Smoothing : ON
CH1 :
0.000V
BW : FULL
CH2 :
0.000V
CH3 :
0.00V
CH4 :
0.00V
Figure 12-2
Serring/
Instrument
Adjusting
Connection
Point
T301(fL):
*1
3.4 V ± 0.1V
L312
*2
State Code
1999/04/05 20:26:47
CH3=1V
500ms/div
DC 10:1
(500ms/div)
NORM:20kS/s
CH2
v/DIV
200mV
=Record Length=
=Trigger=
Main :
100K
Mode : SINGLE
Zoom :
2k
Type : EDGE CH1
Delay :
0.0ns
Hold off :
0.2us
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