MHC-V11
MHC-V11
21
21
TP24
(VREF1)
TP20
(PUHRF)
– MAIN Board (Conductor Side) –
TP20
(PUHRF)
TP24
(VREF1)
CD SECTION
Note:
1. CD block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 M
impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than speci
fi
ed value with the following check.
RF SIGNAL CHECK
+
–
MAIN board
TP20 (PUHRF)
TP24 (VREF1)
oscilloscope
(DC range)
Procedure:
1. Connect the oscilloscope to TP20 (PUHRF) and TP24
(VREF1) on the MAIN board.
2. Press the [
1
] button to turn the power on.
3. Press the [FUNCTION] button to turn the CD function.
4. Press the [
Z
] button to open the disc tray.
5. Set the test disc (YEDS-18) on the disc tray.
6. Press the [
Z
] button to close the disc tray.
7. Press the [
N
] button to playback.
8. Con
fi
rm that oscilloscope waveform is as shown in the
fi
gure
below. (eye pattern)
A good eye pattern means that the diamond shape (
) in the
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 400 ns
level: 1.2 ± 0.2 Vp-p
Connection Location:
SECTION 4
ELECTRICAL CHECKS
TUNER SECTION
0 dB = 1
V
FM AUTO STOP CHECK
signal
generator
unit
Procedure:
1. Press the [
1
] button to turn the power on.
2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation
: 75 kHz
Modulation
: 1 kHz
ANT input
: 35 dBu (EMF)
Note:
Use 75 ohm coaxial cable to connect signal generator and the unit.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Press the [FUNCTION] button to turn the FM tuner function
and scan the input FM signal with automatic scanning.
4. Con
fi
rm that input frequency of A, B and C detected and auto-
matic scanning stops.
When the station signal is received in good condition, automatic
scanning stops.
Summary of Contents for MHC-V11
Page 22: ...MHC V11 MHC V11 22 22 SECTION 5 DIAGRAMS 5 1 BLOCK DIAGRAM OVERALL Section ...
Page 23: ...MHC V11 MHC V11 23 23 5 2 BLOCK DIAGRAM POWER SUPPLY Section ...
Page 44: ...MHC V11 44 U14 SRC4182 U25 RZ5B705 ...
Page 53: ...MEMO MHC V11 53 ...
Page 54: ...MHC V11 REVISION HISTORY Ver Date Description of Revision 1 0 2016 01 New ...
