Read Sharp CD-BA2000 (serv.man6) Service Manual online
CD-BA2000H
– 14 –
CD SECTION
•
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-renge frequency
fH: High-renge frequency
AM IF
450 kHz
1,720 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
*1. Input: Antenna,
Output: TP301
*2. Input: Antenna,
Output: Speaker terminal
•
FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
FM Band
—
87.50 MHz
2.2 V
±
50 mV*
1
Coverage
FM RF
98.00 MHz 98.00 MHz
L312
*2
(10-30 dB)
Test Stage
Instrument
Connection
Frequency Frequency
Display
Serring/
Adjusting
Point
Figure 14-1 ADJUSTMENT POINT
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
FE301
R381
TP302
TP301
R357
AM IF
T303
T306
AM
TRACKING fL
AM BAND
COVERAGE fL
T351
TUNER PWB
CNP302
AM LOOP
ANTENNA
SO301
FM ANTENNA
1
Figure 14-2
CD ERROR CODE DESCRIPTION
Error
State Code
[Servo System Error]
0001
Cannot detect Pickup-in SW
0002
DSP access error
[Error during close operation]
0101
Open/Close SW not functioning (Low
→
High)
0103
Open/Close SW not functioning (High
→
Low)
[Error during open operation]
0201
Open/Close SW not functioning (Low
→
High)
0203
Open/Close SW not functioning (High
→
Low)
[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.
or Disc SW do not change to low.
0307
Clamp SW not function (Low
→
High)
0308
Clamp SW not function (High
→
Low)
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.
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 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 0dB.)
be 0dB.)
* Focus gain adjustment
* Tracking gain adjustment
* Tracking gain adjustment
• Adjustment
T
T
EFBL
FDO
TE
Stopped
CH1=500mV
DC 10:1
CH2=200mV
DC 10:1
CH3=1V
DC 10:1
500ms/div
(500ms/div)
NORM:20kS/s
1
2
3
=Record Length=
Smoothing : ON
CH1 : 0.000V
CH2 : 0.000V
CH2 : 0.000V
Main : 100K
Zoom : 2k
Zoom : 2k
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH2
v/DIV
200mV
v/DIV
200mV
1999/04/05 20:26:47
Click on the first or last page to see other CD-BA2000 (serv.man6) service manuals if exist.