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RXD-655/755
TUNER SECTION
fL : Low-range frequency
fH : High-range frequency
• AM IF/RF
Signal generator : 400HZ, 30%, AM modulated
Test Stage
AM IF
AM Band Coverage
AM Tracking
✽
1. Input Antenna
✽
2. Input Antenna
SO301
FM ANTENNA
FE301
✽
R381
ï
TP301
✽
solder side view
T351
AM
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
16
ADJUSTMENT
Frequency
Frequency Display
450kHz
1620kHz
-
522kHz
990kHz
990kHz
Output : TP302
Output : TP301
AM LOOP
ANTENNA
T303
í AM
TRACKING
T306
ï
AM BAND
COVERAGE
TP302
ó
R357
ADJUSTMENT POINTS
(Component Side View)
Setting/Adjusting
T351
(fL) : T306 1.1±0.1V
(fL) : T303
• FM
Notes
1. Description of the "FM IF Adjustment" is not carried on this manu-
al.
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 adjust-
ment 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.
CD ERROR CODE DESCRIPTION
Error
[Servo System Error]
0001
Cannot detect Pickup-in SW
0002
DSP access error
[Error during close operation]
Open/Close SW not functioning (Low → High)
0101
Open/Close SW not functioning (High → Low)
0103
[Error during open operation]
Open/Close SW not functioning (Low → High)
0201
Open/Close SW not functioning (High → Low)
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 not function (Low → High)
0307
Clamp SW not function (High → Low)
0308
T
Stopped
CH1=500mV
DC 10:1
T
FDO
1
TE
3
EFBL
2
=Filter=
Smoothing : ON
BW : FULL
PartsInstrument Connection
✽
1
✽
2
✽
1
State Code
1999/04/05 20:26:47
CH2=200mV
CH3=1V
500ms/div
DC 10:1
DC 10:1
(500ms/div)
NORM:20kS/s
CH2
v/DIV
200mV
=Offset=
=Record Length=
=Trigger=
CH1 :
0.000V
Main :
100K
Mode : SINGLE
CH2 :
0.000V
Zoom :
2k
Type : EDGE CH1
CH3 :
0.00V
Delay :
0.0ns
Hold off :
0.2us
CH4 :
0.00V
Figure 12-2
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