Sony CMT-E301 / HCD-E301 Service Manual ▷ View online
11
HCD-E301
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
so that outputs match within 1dB of peak.
3. Mode: Playback (FWD)
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
Output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
L-CH
R-CH
HEADPHONE board
PHONES jack (JK401)
PHONES jack (JK401)
oscilloscope
V
H
+ +
–
–
screen pattern
in phase
good
wrong
45
°
90
°
135
°
180
°
32
Ω
32
Ω
set
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: Playback (FWD)
1. Mode: Playback (FWD)
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
set
HEADPHONE board
PHONES jack (JK401)
PHONES jack (JK401)
32
Ω
+
–
–
Adjustment Location: Record/Playback/Erase Head.
Note: Refer to “3-7. CASSETTE LID” (see page 9)
12
HCD-E301
Adjustment Location and Connecting Points
– MAIN BOARD (Component Side) –
L104 FM Frequency
Coverage Adjustment
Coverage Adjustment
T102
AM Frequency Coverage Adjustment
TC102
}
AM Tracking
L110
Adjustment
L103
FM Tracking
TC101
}
Adjustment
– MAIN BOARD (Conductor Side) –
TP10
(FM VT)
TP11
(AM VT)
IC101
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
531 kHz
1.5
±
0.2 V
T102
1,602 kHz
7.3
±
0.3 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L110
603 kHz
TC102
1,404 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L104
87.6 MHz
2.1
±
0.2 V
Confirmation
108 MHz
7.0
±
0.4 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L103
89.9 MHz
TC101
105.9 MHz
TUNER SECTION
0 dB=1
µ
V
[AM]
Setting:
Function
Function
: TUNER
Band switch : AM
[FM]
Setting:
Function
Function
: TUNER
Band switch : FM
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
32
Ω
HEADPHONE board
PHONES jack (JK401)
PHONES jack (JK401)
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
deviation by 400 Hz
signal
Output level: as low as possible
+
–
–
level meter
set
32
Ω
0.01
µ
F
MAIN board
FM ANT
FM ANT
HEADPHONE board
PHONES jack (JK401)
PHONES jack (JK401)
digital voltmeter
100 k
Ω
MAIN board
TP10 (FM VT)
TP11 (AM VT)
TP11 (AM VT)
HCD-E301
13
13
SECTION 6
DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
2
: nonflammable resistor.
•
C
: panel designation.
Note on Printed Wiring Board:
•
•
W
: indicates side identified with part number.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
A
: B+ Line.
•
H
: adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: TAPE PLAY
a
: RECORD
J
: CD PLAY
6-1.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
• Circuit Boards Location
MAIN board
HEADPHONE board
CASSETTE board
DISPLAY board
POWER board
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
HCD-E301
14
14
IC B/D
IC B/D
MAIN BOARD
(2/2)
1
DSIPLAY
BOARD
A
1
4.5 (4.3)
L110, TC102
AM TRACKING
T102
AM FREQUENCY
COVERAGE
L103, TC101
FM TRACKING
L104
FM FREQUENCY
COVERAGE
0 (0.7)
5.4
(0.1)
(0.1)
0
1
(0)
(0)
5.2 (0)
5.2 (6.2)
5.2 (6.2)
0 (6.2)
1.3
1.3
1.2 (0.4)
4.5 (0.1)
4.5 (4.3)
4.5 (5.6)
4.5 (4.3)
0
4.5 (0.1)
0 (0.7)
0.2
(0.4)
5.2
(5.4)
1.3
1.3
5.2 (6.2)
5.2 (6.2)
2.8 (3.6)
0
5.2
(6.2)
5.2
(6.2)
1.3
1.3
0.3 (0.5)
0
0 (2.6)
2.6 (0)
5.1
0.9
0.9
2.4 (1.5)
2.6
2.5
0.1
0.1
5.4
0
0.1 (3.1)
0
9.3
9.2
8.5
0.7
0
0
FM
LEAD
ANTENNA
ANT1
FM ANT
75
Ω
COAXIAL
C157
0.1
C104
0.001
L103
FM RF
C105 0.001
L104 FM OSC
C111
0.001
TP10
(FM VT)
R112
3.3k
+
10V
0.001
0.01
1.2k
0.001
+
50V
0.015
0.015
3.9k
+
+
3.9k
50V
50V
6.8k
6.8k
0.0033 0.0033
+
+
+
50V
3.3k
50V
50V
Q103
STEREO/MONO
SWITCHING
Q102
FM/AM BAND
SELECT SWITCH
Q101
FM OSC BUFFER
IC101
FM/AM IF AMB
MIX, MPX, DET, OSC
IC102
FM/AM PLL
4.7k
100p
0.001
0.022
5.6k
0.01
2.2k
50V
5.6k
+
+
0.1
0.1
7.2MHz
+
MTZJ-5.1
+
10V
1
µ
H
Q116, 209, 210
TUNER B+ SWITCH
0.1
CN101
8P
0.047
AM FERRITE-ROD
ANTENNA
1
µ
H
AM OSC
0.047
+
50V
TP11
(AM VT)
0.022
0.022
10.7MHz
450kHz
+
50V
BUFFER
+
0.047
MAIN BOARD
(1/2)
1N4148TP
1N4148TP
U
1
u
U
2
u
U
3
u
U
4
u
2SC1923
2.2P
10.7MHz
16V
RDSCL
RDSDA
PLLCE
PLLDI
PLLCL
STOUT
SIG
ST
RDSDA
PLLCE
PLLDI
PLLCL
STOUT
SIG
ST
470
16V
18P
4.7k
6-2.
SCHEMATIC DIAGRAM – MAIN Board (1/2) –
•
See page 21 for Waveform.
•
See page 22 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : AM
(Page 19)
(Page 15)
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