Sony CMT-EH55DAB / HCD-EH55DAB Service Manual ▷ View online
HCD-EH55DAB
HCD-EH55DAB
25
25
• See page 27 for IC Block Diagrams.
7-13. SCHEMATIC DIAGRAM - MAIN Board (3/3) -
R452
R453
C457
C458
C455
R451
C456
FB401
FB402
C452
C451
C453
C454
IC451
IC452
10k
100
100
16V
0.1
0.1
10k
0.1
1
50V
1
50V
1
50V
1
50V
NJM2521M
NJM2521M
A-GND
+9V
USB-L
USB-R
CD-L
CD-R
AU-SW
AU-L
AU-R
(3/3)
SWITCH
AUDIO SELECT
SWITCH
AUDIO SELECT
GND
VOU
T
V+
VIN3
VIN1
SW1
VIN2
SW2
GND
VOU
T
V+
VIN3
VIN
1
SW1
VIN2
SW2
• Waveforms
– CD Board –
IC101 JB (RFi)
(CD play mode)
(CD play mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p
IC101 XG (XO)
(CD play mode)
(CD play mode)
1 V/DIV, 20 ns/DIV
59.1 ns
14.6
μs
3.3 Vp-p
RT
Q507 (Collector)
(Tape REC mode)
(Tape REC mode)
5 V/DIV, 10
μs/DIV
9.8 Vp-p
FB
IC701 RG (X3)
1 V/DIV, 10
μs/DIV
30.4
μs
3 Vp-p
FT
IC701 PT (X1)
2 V/DIV, 100 ns/DIV
181 ns
3.2 Vp-p
RB
Q507 (Base)
2 V/DIV, 10
μs/DIV
14.6
μs
4.3 Vp-p
XB
IC101 SB (XOUT_PLL)
1 V/DIV, 20 ns/DIV
59 ns
2.1 Vp-p
– USB Board –
– MAIN Board –
– PANEL Board –
(Page 24)
(Page 24)
(Page 24)
HCD-EH55DAB
HCD-EH55DAB
26
26
• See page 27 for IC Block Diagrams.
7-15. SCHEMATIC DIAGRAM - PT-VBUS Board -
•
: Uses unleaded solder.
• See page 15 for Circuit Boards Location.
7-14. PRINTED WIRING BOARD - PT-VBUS Board -
R913
D903
IC901
C902
C903
C906
C909
C910
R918
CNA901
C911
R919
R920
R921
C913
CN002
L901
100
100
μH
D901
D902
F001
LF901
T002
PT005
T001
C901
2.2k
RK14
PQ1CG2032FZ
0.1
2200
35V
220
35V
35V
0.1
2200
16V
2.2k
2P
0.1
4.7k
10k
2.2k
0.1
4P
1N4002-B5
1N400-B5
T160mAL
250V
0.1
VBUS_5V
VBUS_GND
VMAC
VMAC
GND
USB_EN
(CHASSIS)
POWER
TRANSFORMER
GND
VOU
T
VIN
OADJ
ON/OFF
REGULATOR
5
7
(AC IN)
BUILT IN TRANSFORMER
NOT REPLACEABLE:
∗
∗
+5V
F001
CNA901
D902
CN002
T003
T001
T002
C903
L901
C906
5
1
2
4
D903
IC901
D901
C910
LF901
T004
R913
C913
C902
C911
R919
C909
R918
R921
R920
C901
PT005
1-877-095-
12
(12)
PT-VBUS BOARD
NOT REPLACEABLE:
BUILT IN TRANSFORMER
BUILT IN TRANSFORMER
∗
∗
POWER TRANSFORMER
1
4
G
MAIN
BOARD
CNA102
E
USB
BOARD
CN103
1
2
(AC IN)
A
B
C
D
E
F
G
1
2
3
4
5
6
(Page
18)
(Page
22)
(Page 19)
(Page 24)
HCD-EH55DAB
27
• IC Block Diagrams
– CD Board –
IC201 TK63115SCL-G@GT
THERMAL &
OVER CURRENT
PROTECTION
VOLTAGE
REFERENCE
ON/OFF
CONTROL
VIN 1
GND 2
VCONT 3
NC
4
VOUT
5
+
–
IC401 BA5826SFP-E2
1
2
3
4
5
6
7
8
9
10
11
12
13
13
14
28
27
26
24
23
22
21
20
19
18
17
16
15
25
LEVEL
SHIFT
LEVEL
SHIFT
THERMAL
SHUT-DOWN
REGULATOR
REGULATOR
BIAS TRAP
LEVEL
SHIFT
MUTE
LEVEL
SHIFT
D.BUFF
D.BUFF
D.BUFF
GND
IN4
IN4'
BIAS
VCC
VCC
IN3'
IN3
VO3(+)
VO3(–)
VO4(–)
VO4(+)
RESETt
OPIN
VO1(–)
REGB
VO1(+)
IN1
RESET
REGOUT
MUTE
GND
IN2'
IN2
VO2(+)
VO2(–)
GND
OPOUT
D.BUFF
D.BUFF
D.BUFF
D.BUFF
D.BUFF
REGULA
TOR
VCC
VCC
– USB Board –
IC102 TK63115SCL-G@GT
THERMAL &
OVER CURRENT
PROTECTION
VOLTAGE
REFERENCE
ON/OFF
CONTROL
VIN 1
GND 2
VCONT 3
NC
4
VOUT
5
+
–
IC103 R5523N001B-TR-F
1
EN
2
GND
3
FLG
4 IN
5 OUT
GATE
CONTROL
UVLO
THERMAL
SHUTDOWN
CURRENT
LIMIT
FLAG
DELAY
HCD-EH55DAB
28
IC105 WM8727GED/RV
1
DIN
8 VOUTL
7 VDD
6 GND
6 GND
5 VOUTR
2
BCKIN
3
LRCIN
4
MCLK
SERIAL
INTERFACE
MUTING
MUTING
DIGITAL
FILTERS
RIGHT
DAC
LEFT
DAC
LOW PASS
FILTER
LOW PASS
FILTER
SIGMA-DELTA
MODULATOR
SIGMA-DELTA
MODULATOR
– PANEL Board –
IC707 TK70533SCL-G
OVER HEAT &
OVER CURRENT
PROTECTION
BANDGAP
REFERENCE
CONTROL
CIRCUIT
GND
VIN
2
5
VOUT
4
NP
3
VCONT
1
+
–
– MAIN Board –
IC101 TK70540SCL-G
OVER HEAT &
OVER CURRENT
PROTECTION
BANDGAP
REFERENCE
CONTROL
CIRCUIT
GND
VIN
2
5
VOUT
4
NP
3
VCONT
1
+
–
IC301 LA4631-E
OUT1
VCC
OUT2
IN2
PRE GND
IN1
P.
P.
ST
ANDBY
2
FIL
TER
1
3
4
5
6
7
8
11
13
POWER GND
10
9
12
PRE
DRIVE AMP
INPUT
AMP
STANDBY
SWITCH
THERMAL
SHUT DOWN
PROTECTOR
POP NOISE
PREVENTION
CIRCUIT
REFERENCE
AMP
RIPPLE
FILTER
OUTPUT
AMP
PRE
DRIVE AMP
INPUT
AMP
OUTPUT
AMP
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