Sony HCD-EC50DC / MHC-EC50DC Service Manual ▷ View online
21
HCD-EC50DC
Adjustment Location and Connecting Points
L804
FM TRACKING
ADJUSTMENT
ADJUSTMENT
L805
FM FREQUENCY
COVERAGE
ADUJUSTMENT
COVERAGE
ADUJUSTMENT
– MAIN BOARD (Component side) –
– MAIN BOARD (Conductor side) –
(TUNER VT)
(TUNER GND)
L851
AM TRACKING
ADJUSTMENT
ADJUSTMENT
L852
AM FREQUENCY
COVERAGE
ADUJUSTMENT
COVERAGE
ADUJUSTMENT
FM DETECTOR
ADUJUSTMENT
ADUJUSTMENT
L806
TP (TUNER VT)
TP (TUNER GND)
IC801 pin
qs
(TUNER OUT L-ch)
CNP802
3
1
22
HCD-EC50DC
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
•
H
: adjustment for repair.
•
A
: B+ Line.
•
B
: B– Line.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
– BD Section –
No mark: CD PLAY
– Other Section –
No mark: FM at AC POWER
(
tolerances.
– BD Section –
No mark: CD PLAY
– Other Section –
No mark: FM at AC POWER
(
): FM at DC POWER
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER (FM)
f
: TUNER (AM)
J
: CD
d
: AUX
E
: PB (TAPE)
a
: REC (TAPE)
Note on Printed Wiring Boards:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
• Indication of transistor.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
SECTION 7
DIAGRAMS
Note: The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
23
23
HCD-EC50DC
HCD-EC50DC
TRANSISTOR board
P-AMP board
GUARD (A) board
MAIN board
JACK board
PANEL board
PT board
DC JACK board
GUARD (B) board
P-AMP-L board
BD83S board
• Circuit Boards Location
• Waveforms
5
IC801
w;
(XOUT)
13.3
µ
s
1.5 Vp-p
500m V/DIV, 4
µ
s/DIV
6
IC701
qd
(X0A/P90)
30.5
µ
s
2.2 Vp-p
0.5 V/DIV, 10
µ
s/DIV
7
IC701
od
(X0)
239 ns
3.3 Vp-p
1 V/DIV, 100 ns/DIV
1
IC201
u;
(RFACO)
(CD PLAY mode)
200 mV/DIV, 500 ns/DIV
2
IC201
<z/,
(XTAO)
(CD PLAY mode)
1 V/DIV, 20 ns/DIV
3
IC201
1
(LRCK)
(CD PLAY mode)
1 V/DIV, 10
µ
s/DIV
4
IC201
5
(BCK)
(CD PLAY mode)
1 V/DIV, 200 ns/DIV
0.5 to 1.3 Vp-p
59.1 ns
3.3 Vp-p
22.7
µ
s
3.3 Vp-p
472 ns
3.4 Vp-p
– BD83S Board –
– PANEL Board –
– MAIN Board –
24
24
HCD-EC50DC
HCD-EC50DC
7-1. BLOCK DIAGRAM — BD/DRIVER SECTION —
: CD
• Signal Path
A
MAIN
SECTION
(Page 26)
Q669,672
Q671,670
Q665,668
Q667,666
M1
-
+
-
+
M1+
M1-
M2+
M2-
M
P67/AN7/INT2
P35/IC1
P74/SDA/SC2
P30/SO3
P31/SC3
P75/SCL/SO2
P37/OCU1
P41/LED1
P43/LED3
P51/TIN1
P52/TIN2/PPGO
P53/PPG1
P42/LED2
P50/TINO
P54/SI0
P55/SC0
P33/TMCK
P56/SO0
P26
P76
SW3
SW1
SW7(CHACK)
SW8(OPEN)
SW2
SW6(CLOSE)
SW5(STOCK)
OPTICAL PICK-UP
BLOCK
(KSM-213DCP/C2NP)
AUTOMATIC
POWER
CONTROL
Q321
+1.7V
+3.3V
LD
GND
FOCUS
COIL
F+
F
T+
T
SP+
SP
SL+
SL
TRACKING
COIL
IC402
S201
(LIMIT)
X201
16.9344MHz
+3.3V
SL/SP MOTOR
DRIVER
MOTOR
DRIVE
IC201
RF AMP,DSP,MP3
12
6
11
13
14
VR
PD
16
15
18
17
4
23
2
20
MUTE
CH2OUTF
CH1FIN
CH1RIN
CH2FIN
CH3FIN
OPIN+
CH2OUTR
CH1OUTR
CH1OUTF
CH4OUTF
CH4OUTR
CH3OUTR
CH3OUTF
M
M
M401
(SPINDLE)
M402
(SLED)
VCC
VC
A
B
C
D
E
F
DETECTOR
A
B
E
50
F
51
LD
66
PD
67
TFDR
43
SSTP
39
FFDR
45
SFDR
41
MPD
M-MUTE
38
XTACN
XRST
DATA
XLAT
CLOCK
117
AOUT2
112
AOUT1
108 XTAO
109 XTAI
57
58
C
59
D
60
SENS
XTACN
XRST
DATA
XLAT
CLOCK
SENS
13
XLAT-MP3
REQ-MP3
REQ-MP3
CD-L
CD-R
XLAT-MP3
TRDR
44
22
CH3RIN
SRDR
42
CH2RIN
FRDR
46
5
3.3V
+1.8V
IC203
CD MECHANISM DECK
BLOCK
SYSTEM CONTROLLER
IC701
(1/2)
7
3
1
ACK-MP3
ACK-MP3
12
15
7
89
16
11
20
26
8
DATA2
DATA-MP3
90
CLK2
CLK-MP3
10
IREQ-MP3
IREQ-MP3
SCOR
SCOR
+1.8
REG
REG
43
10
49
5
6
50
12
28
P44/LED4 21
P45/LED5/TOT0 22
P46/LED6/TOT1 23
P47/LED7/TOT2 24
27
26
20
25
19
18
29
30
8
31
3
34
14
FOCUS/TRUCKING
COIL DRIVER
MOTOR
DRIVE
M2
M
MOTOR
DRIVE
MOTOR
DRIVE
Q661-664
VM9V
CD
MOTOR
CONTROL
P36/OCU0
11
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