
HCD-EC69i/EC79i/EC99i
HCD-EC69i/EC79i/EC99i
40
40
• 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
14
28
27
26
24
23
22
21
20
19
18
17
16
15
25
LEVEL
SHIFT
LEVEL
SHIFT
THERMAL
SHUT-DOWN
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
– MAIN Board –
IC602 BD3499FV-E2
1
A1
18 BCB1
17 BCA1
16 BCA2
20 SB2
19 OUT2
22 SB1
21 SR
24 VCC
23 OUT1
26 SDA
25 SCL
28 FIL
27 GND
15 BCB2
2
A2
3
B1
5
C1
6
C2
4
B2
11
VOL1
12
VOL2
13
TC2
14
TC1
7
D1
8
D2
9
SEL2
10
SEL1
INPUT
SELECTOR
TREBLE/
BASS
INVERTER
VOLUME
INPUT
GAIN
SURROUND
PC BUS
LOGIC
IC701 NJM2368V (TE2)
IN-
1
REF
8
CT
7
CS
6
V+
5
F.
B
2
GND
3
OUT
4
UNDERVOLTAGE
LOCKOUT
L. O
30
μ
A
VOLTAGE
REFERENCE
+
−
ERROR
AMP
+
−
S. C. P
PWM
+
−
OSC
+
−
+
+
IC101
JB
(RFi)
(CD play mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p
IC101
XG
(XO)
(CD play mode)
1 V/DIV, 20 ns/DIV
59.1 ns
3.3 Vp-p
XB
IC301
RG
(X1A)
1 V/DIV, 10
μ
s/DIV
30.6
μ
s
3.1 Vp-p
RB
IC801
X
(XOUT)
500 mV/DIV, 5
μ
s/DIV
13.4
μ
s
1.2 Vp-p
XT
IC301
PT
(X1)
1 V/DIV, 100 ns/DIV
168 ns
3.6 Vp-p
• Waveforms
– CD Board –
– MAIN Board –
– PANEL Board –
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299