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CD-BK310V
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage
Frequency
AM IF
450 kHz
AM Band
—
Coverage
AM Tracking 990 kHz
*1. Input: Antenna
*2. Input: Antenna
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
Fig.14-2 EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0 dB.)
* Focus gain adjustment
* Tracking gain adjustment
Frequency
Setting/
Instrument
Display
Adjusting
Connection
Parts
1,602 kHz
T351
*1
531 kHz
(fL): T306
*2
1.1 ± 0.1 V
990 kHz
(fL): T303
*1
Output: TP302
SO302
Output: TP301
FM ANTENNA
TERMINAL
FM BAND
COVERAGE fL
Figure 14-1 ADJUSTMENT POINTS
• FM RF
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Test Stage
Frequency Frequency
FM Band
Coverage
FM RF
*1. Input: Antenna
*2. Input: Antenna
CNP301
AM LOOP
ANTENNA
T303
IC301
L312
T302
FM IF
FM RF
T301
AM BAND
COVERAGE fL
T351
AM IF
TP302
Stopped
CH1=500 mV
DC 10:1
T
FDO
1
TE
3
EFBL
2
=Filter=
Smoothing : ON
BW : FULL
– 14 –
Display
Adjusting
—
87.50 MHz
T301(fL):
1.3 V ± 50 mV
98.00 MHz 98.00 MHz
L312
(10-30 dB)
Output: TP301
Output: Speaker terminal
MAIN PWB
AM
TRACKING fL
R316
TP301
T306
R357
T
CH2=200 mV
CH3=1 V
DC 10:1
DC 10:1
=Offset=
=Record Length=
CH1 :
0.000 V
Main :
100 K
CH2 :
0.000 V
Zoom :
2 k
CH3 :
0.00 V
CH4 :
0.00 V
Figure 14-2
Setting/
Instrument
Connection
Point
*1
*2
1999/04/05 20:26:47
500 ms/div
(500 ms/div)
NORM:20 kS/s
CH2
v/DIV
200 mV
=Trigger=
Mode : SINGLE
Type : EDGE CH1
Delay :
0.0 ns
0.2 µs
Hold off :
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