Read Sharp CD-BA3100 (serv.man2) Service Manual online
CD-BA3100H
– 16 –
CD SECTION
Figure 16-1 ADJUSTMENT POINTS
Figure 16-2
CD ERROR CODE DESCRIPTION
Error
State Code
[Pickup Mechanism Error]
ER-CD00
Pickup mechanism error
ER-CD01
Pu-in SW detection NG
[CD Changer Mechanism Error]
ER-CD10
Changer error
ER-CD11
Initial error
ER-CD20
Tray error
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
compensated inside the IC.)
* Focus offset adjustment
* Tracking offset adjustment
* Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing
Fig.16-2 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.)
be 0 dB.)
* Focus gain adjustment
* Tracking gain adjustment
* Tracking gain adjustment
• 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.
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.
T
T
EFBL
FDO
TE
Stopped
CH1=500 mV
DC 10:1
CH2=200 mV
DC 10:1
CH3=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM: 20 kS/s
1
2
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.000 V
CH2 : 0.000 V
Main : 100 K
Zoom : 2 K
Zoom : 2 K
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH2
v/DIV
200 mV
v/DIV
200 mV
1999/04/05 20:26:47
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
•
AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
fH: High-range frequency
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
—
522 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM Tracking 990 kHz
990 kHz
(fL): T303
*1
• FM
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually.
R336
TP301
T306
R357
T351
CNP302
AM LOOP
ANTENNA
T303
MAIN PWB-A
1
SO301A
FM ANTENNA
TERMINAL
FE301
AM IF
AM BAND
COVERAGE fL
COVERAGE fL
AM
TRACKING fL
TRACKING fL
TP302
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