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TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• • • • • AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Frequency
Test Stage
AM IF
450 kHz
AM Band
—
Coverage
AM Tracking 990 kHz
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
• FM IF
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.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually.
MAIN PWB
1
SO301
FM ANTENNA
TERMINAL
T303
AM TRACKING
fL
Figure 11-1 ADJUSTMENT POINTS
Frequency
Setting/
Instrument
Display
Adjusting
Connection
Parts
1,620 kHz
T351
*1
522 kHz
(fL): T306
*2
1.1 ± 0.1 V
990 kHz
(fL): T303
*1
R381
TP301
T351
AM IF
TP302
L354
R357
T306
AM BAND
COVERAGE fL
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.11-2 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
CD ERROR CODE DESCRIPTION
Error
When Pickup set inner position, inner switch
01
cannot detect 'ON' level for 10 secs.
When tray moves to Open/Close, Open/Close switch
cannot detect 'ON' level for 7 secs.
10*
When disc table rotate to target position.
Clamp switch cannot detect 'ON' level for 7 secs.
When disc table set to Disc1 position for 1 st time,
11*
"CLAMP SW", "DISC NO SW" and "OPEN/CLOSE"
cannot detect 'ON' level for 14 secs.
When it changes to CD function, DSP cannot read
31
initial data.
* 'CHECKING'
If Error is detected, 'CHECKING' will be display instead of 'ER-
CD**' display. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
T
Stopped
CH1=500 mV
CH2=200 mV
DC 10:1
DC 10:1
T
FDO
1
TE
3
EFBL
2
=Filter=
=Offset=
Smoothing : ON
CH1 :
BW : FULL
CH2 :
CH3 :
CH4 :
– 11 –
Explanation
1999/04/05 20:26:47
CH3=1 V
DC 10:1
=Record Length=
0.000 V
Main :
100K
Mode : SINGLE
0.000 V
Zoom :
2k
Type : EDGE CH1
0.00 V
Delay :
Hold off :
0.00 V
Figure 11-2
CD-E700H
500 ms/div
(500 ms/div)
NORM:20 kS/s
CH2
v/DIV
200 mV
=Trigger=
0.0 ns
0.2 µs
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