Filter
Top Products
– 16 –
SECTION 3
ELECTRICAL ADJUSTMENTS
TEST MODE
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and AM (MW) Auto Scan/Stop Level adjustments
can be performed easier than it in ordinary procedure.
<Set the Test Mode>
1. Turn ON the regulated power supply. (The clock is displayed)
Note: Press the [OFF] button, if the clock is not displayed.
2. Push the preset [4] button.
3. Push the preset [5] button.
4. Press the preset [1] button for more than two seconds.
5. Then the display indicates all lights, the test mode is set.
<Release the Test mode>
1. Push the [OFF] button.
MD SECTION
MD section adjustments are done automatically in this set.
TUNER SECTION
Note:
Adjust the tuner section in the sequence shown below.
1. FM Auto Scan/Stop Level Adjustment.
2. FM Stereo Separation Adjustmnet.
3. AM (MW) Auto Scan/Stop Level Adjustment.
4. RDS S-Meter Adjustment. (MDX-C5960R/5970R)
FM Auto Scan/Stop Level Adjustment
Setting:
[SOURCE] button: FM
FREQUENCY SELECT switch: FM 200 k (E model)
Procedure:
1. Set to the test mode.
2. Push the [SOURCE] button and set to FM.
Display
0 dB=1 µV
See the adjustment location from on page 18 for the ad-
justment.
Cautions during repair
When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.
3. Adjust with the volume RV2 on TU1 so that the “FM” indica-
tion turns to “FM0” indication on the display window.
But, in case of already indicated “FM0”, turn the RV2 so that
put out light “0” indication and adjustment.
Display
*1: MDX-C5960R/C5970R indicate “98.00”.
Adjustment Location: See page 18.
FM Stereo Separation Adjustment
Setting:
[SOURCE] button: FM
FREQUENCY SELECT switch: FM 200 k (E model)
Procedure:
L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.
Specification: Separation more than 30 dB
Adjustment Location: See page 18.
FM RF signal
generator
Carrier frequency: 97.9 MHz (MDX-C5970)
98.0 MHz (MDX-C5960R/C5970R)
Output level : 22 dB (12.6
µ
V)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30%)
0.01
µ
F
set
antenna jack (J1)
FM RF signal
generator
0.01
µ
F
set
antenna jack (J1)
+
–
LINE OUT jack (CNP300)
level meter
10 k
Ω
MDX-C5970
MDX-C5960R/
C5970R
Carrier frequency 97.9 MHz 98.0 MHz
Output level 60 dB (1 mV) 70 dB (3.2 mV)
Mode stereo stereo
main
1 kHz, 33.75 kHz 1 kHz, 16.25 kHz
deviation (45%) deviation (21.7%)
Modulation sub
1 kHz, 33.75 kHz 1 kHz, 16.25 kHz
deviation (45%) deviation (21.7%)
19 kHz 7.5 kHz 7.5 kHz
pilot deviation (10%) deviation (10%)
FM Stereo
Level meter Level meter
signal generator
connection reading (dB)
output channel
L-CH L-CH A
B
R-CH L-CH Adjust RV4 on TU1
for minimum reading.
R-CH R-CH C
D
L-CH R-CH Adjust RV4 on TU1
for minimum reading.
SHUF
*1
SHUF
*1