CD-DP2500W/DK2500W
– 14 –
CD SECTION
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna,SO301 Output: TP302
*2. Input: Antenna,SO301 Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
AM IF 450 kHz 1,602 kHz T351 *1
AM Band — 531 kHz (fL): T306 *2
Coverage 1.1 ± 0.1 V
AM Tracking 990 kHz 990 kHz (fL): T303 *1
Figure 14-2 ADJUSTMENT POINT
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
Figure 14-3
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.
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.
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 14-3
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
• 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
Main : 100K
Zoom : 2k
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2us
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger==Filter= =Offset=
CH2
v/DIV
200mV
1999/04/05 20:26:47
T303
T351
CF352
CF351
CF302
IC303
T306
T302
IC302
IC301
CNP301
SO301
AM LOOP
ANTENNA
T301
MAIN PWB
AM Tracking
AM Band Coverage
AM IF
L312
FM75 ohms
GND
C393
TP301
C375
R357
TP302
ADJUSTMENT
MECHANISM SECTION
• Driving Force Check
Torque Meter
Specified Value
Play: TW-2111 Tape 1: Over 80 g
Tape 2: Over 80 g
• Torque Check
Torque Meter
Tape 2
Play: TW-2111 30 to 80 g. cm 30 to 80 g.cm
Fast forward: TW-2231 — 70 to 180 g.cm
Rewind: TW-2231 — 70 to 180 g.cm
Specified Value
Tape 1
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal MTT-111 Variable 3,000 ± Speaker
speed Resistor in 30 Hz terminal
motor. (Load
(MM1) resistance:
6 ohms)
• Tape Speed
Figure 14-1
TAPE MECHANISM
Motor
Variable Resistor in motor
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