Service manual

MD-MX30/MX30W
– 20 –
ADJUSTMENT
fL: Low-range frequency
fH: High-range frequency
fC: Center-range frequency
• AM adjustment and confirmation
Figure 20-1 AM IF/Frequency Cover
TUNER SECTION
Adjusting item
Adjusting object
Adjusting
method
IF Adjust the indication of Set IF waveform
T351 set to 1,720 kHz. 450 kHz to maximum.
Frequency cover fL: T306 (530 kHz) fL: 1.3 ± 0.1 V
(VT line voltage of Adjust the indication fH: 8.5 ± 1.3 V
TP301) of set to 530 kHz. (Only confirmation)
fH: (1,720 kHz)
Tracking fC: T302 (990 kHz) Set the output of
speaker terminal
to maximum.
AM signal oscillator Frequency 400 Hz, 30%, AM modulation
• FM mute level adjustment
MD-MX30:
FM signal oscillator Frequency 1 kHz, 67.5 kHz dev.
MD-MX30W:
FM signal oscillator Frequency 1 kHz, 40 kHz dev.
Frequency
Adjusting
object
Adjusting
method
98 MHz 26 dB(EMF) VR351 Input: SO301B
Output: Speaker
Terminal
Adjusting object
Figure 20-2 FM Mute Level
• Erasing the registered broadcast station
When the power is off, press and hold the TUNER(BAND)
button and the MD STOP button, and then press the ON/
STAND-BY button.
All the registered stations are erased.
Since this CD system incorporates the automatic adjustment functions, readjustment is not needed when replacing the pickup.
Therefore, PWBs and pickups can be combined freely.
Each time a disc is changed, automatic adjustment is performed. Therefore, playback of each disc can be performed under
optimum conditions.
• Adjustment
Figure 20-3 ADJUSTMENT POINT
CD SECTION
• Setting the Test Mode
While holding down the TUNER(BAND) button and the MD
PLAY button, press the ON/STAND-BY button. Frequencies
are rewritten in memory as shown in table 18. Call them using
the JOG DIAL for tuner circuit adjustment and check.
Note that once you reinitialize the settings, the frequencies
recorded by users will be changed.
Preset No. Frequency
P01 87.5 MHz P06 530 kHz 531 kHz
P02 108.0 MHz P07 1,720 kHz 1,602 kHz
P03 90.0 MHz P08 600 kHz 603 kHz
P04 106.0 MHz P09 1,400 kHz 1,404 kHz
P05 98.0 MHz P10 990 kHz 990 kHz
Preset No.
Frequency
IC303
CF352
CF302
T351
VR351
FM MUTE
LEVEL
T306
FE301
T302
SO301A
IC302
11
10
9
8
7
6
5
4
3
2
1
12
13
14
15
16
17
18
19
20
21
22
11
10
9
8
7
6
5
4
3
2
1
12
13
14
15
16
17
18
19
20
21
22
23
24
AM ANT.
TUNER PWB-A3
OSC.AM
AM IF
TP301
SO301B
ANTENNA TERMINAL
GND
AM signal oscillator
AM Loop Antenna
UNIT
IF:Speaker Terminal
Freqency cover:TP301
Electronic
voltmeter
FM signal oscillator
SO301A
UNIT
Speaker Terminal
Electronic
voltmeter
Table 20
Adjusting item
Adjusting object
Adjusting
method
IF Adjust the indication of Set IF waveform
T351 set to 1,620 kHz. 450 kHz to maximum.
Frequency cover fL: T306 (522 kHz) fL: 1.3 ± 0.1 V
(VT line voltage of Adjust the indication fH: 8.5 ± 1.3 V
TP301) of set to 522 kHz. (Only confirmation)
fH: (1,620 kHz)
Tracking fC: T302 (990 kHz) Set the output of
speaker terminal
to maximum.
MD-MX30
MD-MX30W
Frequency
(MD-MX30) (MD-MX30W)