ZS-RS70BT/RS70BTB
ZS-RS70BT/RS70BTB
25
25
SECTION 4
ELECTRICAL CHECKS
TUNER SECTION
0 dB = 1
V
[AM] (RS70BT only)
Setting:
Function: RADIO
Band: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the unit.
JACK board
i
jack (J301)
unit
+
í
level meter
32
:
[FM]
Setting:
Function: RADIO
Band: FM
FM RF signal
generator
75 kHz frequency
deviation by
1 kHz signal
Output level:
as low as possible
JACK board
i
jack (J301)
unit
0.01
P
F
+
í
level meter
TUNER board (RS70BT):
FM test point (Not print) (GND)
DAB board (RS70BTB):
FM test point 2 (Not print) (GND)
32
:
TUNER board (RS70BT):
TP1
DAB board (RS70BTB):
FM test point 1(Not print)
Note:
Perform FM frequency coverage check after removing FM tele-
scopic antenna (ANT1).
no mark: E41 model
( ): E92 and MX models
AM FREQUENCY COVERAGE CHECK
Check that reading on level meter is the maximum
Con
fi
rmation
531 (530) kHz
Con
fi
rmation
1,602 (1,710) kHz
FM FREQUENCY COVERAGE CHECK
Check that reading on level meter is the maximum
Con
fi
rmation
87.5 MHz
Con
fi
rmation
108 MHz
• Abbreviation
E41
: Bolivian, Chilean, Paraguayan, Peruvian and
Uruguayan models
E92
: Venezuelan, Panamanian, Honduran, Guatemalan,
Colombian, Costa Ri-ca, Dominican, Ecuadorean and
El Salvador models
MX
: Mexican model
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 indicat-
ed.
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 checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
+
–
CD board
TP (RFOUT)
TP (VC)
oscilloscope
Procedure:
1. Connect the oscilloscope to RFOUT and VC on the CD board.
2. In the standby state, press the [POWER] (Except AEP and UK
models)/[OPERATE] (AEP and UK models) button to turn the
power on.
3. Press the [CD] button to turn the CD function.
4. Set the disc (YEDS-18) and press the [MANUAL PRESET
u
] button to playback.
5. 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: 500 ns
level: 1.0 ± 0.5 Vp-p
Connection Location:
TP
(VC)
TP
(RFOUT)
– CD Board (Conductor Side) –
R728
C719
C721
R732
C759
R701
C702
1
20
80
21
C754
X701
C703
C709
C710
C708
C701
C704
C715
C712
C714
C71
1
R724
C716
R719
R717
R721
R723
R533
E C B
Q701
R534
TP
(VC)
TP
(RFOUT)
Connection Location:
TP1
FM test point
(GND)
– DAB Board (Component Side) (RS70BTB) –
– TUNER Board (Conductor Side) (RS70BT) –
TP1
C5
C2
C1
C6
1
R13
R1
R2
L1
C10
D3
FM
test point
(GND)
FM
test point 2
(GND)
FM
test point 1
DAB module
Summary of Contents for ZS-RS70BT
Page 79: ...MEMO ZS RS70BT RS70BTB 79 ...
