Sony CMT-EH25 / CMT-EH26 / HCD-EH25 / HCD-EH26 Service Manual ▷ View online
HCD-EH25/EH26
HCD-EH25/EH26
13
13
7-2. BLOCK DIAGRAM - TUNER/USB Section -
FM MIX
AMP
Q803
FM/AM TUNER,
FM/AM PLL
IC801
RDS DECODER
IC861
36 FMRF-IN
8 FMIF-IN
22 MPX-IN
1 AMRF-IN
31 AM-OSC
25
TU_DO
56
TU_CLK
55
TU_CE
57
TU_DI
39
TU_ASD
SYSTEM CONTROLLER
IC701 (2/3)
+4V
REGULATOR
Q862
VM +9V
RDS +4V
X801
75kHz
20
19
XIN
XOUT
16
DI
17
CL
15
CE
18
DO
25
AGC
1
CNP802
ANTENNA
FM/AM
3
BAND-PASS
FILTER
BPF801
AM
TRACKING
L851
AM-RF
AM VT
VOLTAGE
L852
AM-OSC
D851
CF801
7 AMIF-IN
L803
AM-IFT
34 FMRF-OUT
FM
TRACKING
L804
FM-RF
32 FM-OSC
FM VT
VOLTAGE
L805
FM-OSC
VM +9V
11 FM-DET
FM
DETECTOR
L806
FM-DET
3
FM-MIX
30
BO2
23
FMDET-OUT
12
L-OUT
13
R-OUT
R-CH
TUNER-L
5
AM-MIX
24
AMDET-OUT
CF802
CF803
4
FIN
DET AMP
Q861
26
RDS_DA
TA
2
D0
45
RDS_CLK
16
CL
X861
4.332MHz
14
13
XIN
XOUT
B
• SIGNAL PATH
: AM
• R-ch is omitted due to same as L-ch.
: FM
(EH25: AEP, UK/EH26)
3
CN104
(USB)
D+
D–
2
USB CONTROLLER
IC101
D/A CONVERTER
IC105
USB_DP
34
USB_DM
33
DATA 55
LRCK 53
BCK 54
DIN
1
LRCI
3
MCLK
2
VOUTL 8
VOUTR 5
XOUT_PLL
XIN_PLL
40
41
X101
16.9344MHz
CLOCK SHIFT
IC104
MCLK
4
RESETX
1
SDA
13
SCL
12
BUSY
11
MCHNG
10
USB_SDA
49
USB_SCL
50
USB_BUSY
19
MCHING
18
USB_RESET
17
: USB
R-CH
C
USB-L
(Page 14)
(Page 14)
HCD-EH25/EH26
HCD-EH25/EH26
14
14
7-3. BLOCK DIAGRAM - MAIN/POWER SUPPLY Section -
R-CH
INPUT SELECTOR,
ELECTRICAL VOLUME
IC401
28
REC1O
18
OUT1
13
SD
23 C1
21 B1
2 PB1P
19 A1
R-CH
CD-L
A
TUNER-L
6,*1$/3$7+
: CD PLAY
: TAPE PLAY
: REC
: REC
5FKLVRPLWWHGGXHWRVDPHDV/FK
J105
AUDIO IN
J102
PHONES
SPEAKER
+
–
–
–
+
R
L
J101
BIAS OSC
L501
OSC
Q507
TPR501
(REC/PB)
TAPE
MECHANISM
DECK
L-CH
SW501-1
SW501
(REC/PB)
PB
r
REC
R-CH
R-CH
POWER
AMP
IC301
33
FUNC_SDA
RMC
9
SYSTEM CONTROLLER
IC701 (3/3)
+
(AC IN)
F001
POWER
TRANSFORMER
PT005
6<69
D702
D116 – 118
D372
AMP B+
RECT
D107 – 110
B+ SWITCH
Q351, 352
AC DETECT
Q371, 372
AC DETECT
Q121, 122
92/7$*(
DETECT
Q705, 706
RECT
D111, 113
VSTBY
+9V
5(*8/$725
Q101 – 103
VM +9V
USB
'9''9
VM +7V
TUNER +5V
TUNER +3V
46
POWER_ON
42
HOLD
36
P_MONI
54
REST
REMOTE CONTROL
RECEIVER
IC703
LED DRIVE
Q707
LED701
/&'%$&./,*+7
LED_STBY
22
LED
1
LED702
X701
32768Hz
14
13
X3
X2
92
93
X702
0+]
X1
X0
LCD702
LIQUID
CRYSTAL
DISPLAY
48 RE_VOL
2 CD OPEN/CLOSE
ROTARY
ENCODER
SW700
VOLUME
STANDBY
SW701 – 711
(FRONT PANEL KEYS)
SW750
(CD LID OPEN/CLOSE DETECT)
KEY1 – KEY3
37, 38, 41
COM0 – COM3
59 – 62
6(*±6(*
63, 64, 67 – 89, 94 – 100
RESET
SWITCH
Q704
B
SW501-2
40
TP_ST
ATE
DC
DETECT
Q123
F002
LED DRIVE
Q711, 712
LINE FILTER
LF901
92/7$*(
SELECTOR
S002
5(*8/$725
Q701 – 703
5(*8/$725
Q802
5(*8/$725
Q801
9
5(*8/$725
IC707
9
5(*8/$725
IC706
D703
9
5(*8/$725
IC201
9
5(*8/$725
IC102
92/7$*(
DETECTOR
IC709
Q710
D704, 705
B+ SWITCH
Q713, 714
86%$9''9
86%9
$9''9
'9''9
9''9
24
86%B5(*B21
23
CD_ON
RECT
D901, 902
+5V
5(*8/$725
IC901
VBUS POWER
ON/OFF SWITCH
IC103
VBUS B+
AUDIO SELECT
SWITCH
IC451
USB-L
C
: USB
: AUDIO IN
: FM
30
AUDIO_SW
34
AMP_ON
21
USB_EN
20
86%B)/*
+
9
5(*8/$725
Q708
9
5(*8/$725
Q709
(;&(37(+&RORPELDQ
&KLOHDQDQG3HUXYLDQPRGHOV
(+&RORPELDQ&KLOHDQ
DQG3HUXYLDQPRGHOV
(Page 12)
(Page 13)
(Page 13)
Ver. 1.5
HCD-EH25/EH26
HCD-EH25/EH26
15
15
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
• All capacitors are in μF 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
specifi ed.
• f : internal component.
•
C : panel designation.
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.)
•
A : B+ Line.
•
H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– CD board –
no mark : CD PLAY
– USB board –
no mark : USB
– Other board –
no mark : FM
[ ] : AM
( ) : CD PLAY
‹‹ ›› : USB
< > : TAPE PLAY
{ } : REC
no mark : CD PLAY
– USB board –
no mark : USB
– Other board –
no mark : FM
[ ] : AM
( ) : CD PLAY
‹‹ ›› : USB
< > : TAPE PLAY
{ } : REC
*
: Impossible to measure
• Voltages are taken with VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F :
FM
f :
AM
J
: CD PLAY
N :
USB
E :
TAPE
PLAY
j :
REC
h :
AUDIO
IN
• Abbreviation
AUS :
AUS :
Australian
model
E2
: Colombian model
E51
: Chilean and Peruvian models
IND
: Indian model
KR
: Korean model
MX
: Mexican model
RU
: Russian model
SP
: Singapore model
For Printed Wiring Boards.
Note:
•
•
X : Parts extracted from the component side.
•
Y : Parts extracted from the conductor side.
•
W : indicates side identifi ed with part number.
• f : internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
Note: The components identifi ed by mark
0 or dotted
line with mark
0 are critical for safety.
Replace only with part number specifi ed.
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
• Circuit Boards Location
MAIN board
PANEL board
CD board
PT-VBUS board
USB board
VOLTAGE-SEL board
(Colombian, Chilean
and Peruvian models)
(Colombian, Chilean
and Peruvian models)
Ver. 1.6
• Abbreviation
AUS :
AUS :
Australian
model
E2
: Colombian model
E51
: Chilean and Peruvian models
IND
: Indian model
KR
: Korean model
MX
: Mexican model
RU
: Russian model
SP
: Singapore model
HCD-EH25/EH26
HCD-EH25/EH26
16
16
•
: Uses unleaded solder.
• See page 15 for Circuit Boards Location.
7-4. PRINTED WIRING BOARD - CD Board -
R150
R149
R148
R108
R154
R153
C148
C1
10
C109
C301
C303
C302
C104
R1
10
C1
16
C404
R203
R204
R205
R206
R207
R208
R209
R210
R219
R223
R222
R147
R221
R218
R146
R145
C150
R113
C403
R202
C151
C108
C105
C147
C146
C145
C152
C1
18
C1
17
C144
C101
C125
CN201
C143
C120
R144
R157
C142
C141
C140
C100
C107
R408
R156
C124
C127
C126
CN301
R101
C1
19
C102
R415
R414
C103
R405
C113
R102
R402
R105
R106
C132
C138
C137
R135
R134
R136
R130
R128
R129
R143
R139
C136
R120
R114
C153
C112
R125
R126
C149
C139
R127
R1
18
R140
R151
C122
C123
R220
R104
S201
R155
C128
C106
C201
R304
R302
C309
C205
C207
C307
R303
C133
R111
R112
C115
R21
1
Q301
R301
C204
C202
C206
C306
R212
C401
C130
C405
IC201
IC401
IC101
R201
R142
CD BOARD
(COMPONENT SIDE)
CD BOARD
(CONDUCTOR SIDE)
3
1
4
5
1
7
8
14
28
22
21
15
TP124
(VC)
TP122
(RFEQO)
1
25
26
50
51
75
76
100
1
21
A
PANEL
BOARD
CNP701
16
1
1-872-135-
11
(11)
1-872-135-
11
(11)
OPTICAL PICK-UP BLOCK
(KSM-213CDP)
A
B
C
D
E
F
1
2
3
4
5
6
7
8
9
E
(LIMIT)
M401
(SPINDLE)
M402
(SLED)
M
M
X102
(Page 24)
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