Sony HCD-EC68 / HCD-EC78 / MHC-EC68 / MHC-EC78 Service Manual ▷ View online
HCD-EC68/EC78
37
• Waveforms
– CD Board –
– CD Board –
IC101 XG (XO)
(CD play mode)
(CD play mode)
1 V/DIV, 20 ns/DIV
59.1 ns
3.3 Vp-p
RB
CN501 (EH)
20 V/DIV, 5
μs/DIV
14
μs
56 Vp-p
IC101 JB (RFi)
(CD play mode)
(CD play mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p
– DECK Board –
FT
IC301 PT (X1)
1 V/DIV, 50 ns/DIV
166 ns
3 Vp-p
FB
IC301 RG (X1A)
1 V/DIV, 10
μs/DIV
30.5
μs
3 Vp-p
– MAIN Board –
– PANEL Board –
XB
IC801 RM (XIN)
500 mV/DIV, 5
μs/DIV
13.3
μs
1 Vp-p
HCD-EC68/EC78
38
• IC Block Diagrams
– CD Board –
– CD Board –
IC201 TK63115SCL-G@GT
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
THERMAL &
OVER CURRENT
PROTECTION
VOLTAGE
REFERENCE
ON/OFF
CONTROL
VIN 1
GND 2
VCONT 3
NC
4
VOUT
5
+
–
– MAIN Board –
IC602 BD3499FV-E2
1
A1
18 BCB1
17 BCA1
16 BCA2
17 BCA1
16 BCA2
20 SB2
19 OUT2
22 SB1
21 SR
21 SR
24 VCC
23 OUT1
26 SDA
25 SCL
25 SCL
28 FIL
27 GND
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
HCD-EC68/EC78
39
IC801 LV23003VA
1
AM RF-IN
3
FM-MIX
2
REG
6
VCC1
4
GND1
AM
RF
AM
MIX
AM
DET
AM
IF
FM
DET
FM
IF
SD
FF
VCO
FF
FF
ST
TRIG
STSW
FM
MIX
FM
OSC
AM
OSC
OSC
BUFFER
FM
S-METER
DECODER
PHASE
COMPARATOR
MUTE
PROGRAMMABLE
DIVIDER
REFERENCE
DIVIDER
UNLOCK
DETECTOR
SWALLOW
COUNTER
POWER ON
RESET
DATA SHIFT
REGISTER
LATCH
PHASE
DETECTOR
CHARGE
PUMP
UNIVERSAL
COUNTER
5
AM-MIX
7
AMIF-IN
8
FMIF-IN
9
P-DET
10
P-COMP
11
FM-DET
12
L-OUT
13
R-OUT
14
VSS
FM
RF
36 FM RF-IN
35 GND2
34 FMRF-OUT
33 VCC2
35 GND2
34 FMRF-OUT
33 VCC2
30 BO2
29 BO1
29 BO1
32 FM-OSC
31 AM-OSC
28 LP-OUT
27 LP-IN
27 LP-IN
23 FMDET-OUT
15
CE
16
DI
17
CL
18
DO
22 MPX-IN
19 XIN
20 XOUT
21 VDD
26 PD
25 AGC
25 AGC
24 AMDET-OUT
LOW-PASS
FILTER
AGC
IF
BUFFER
PIROT
DET
CCB
I/F
HCD-EC68/EC78
40
• IC Pin Function Description
CD BOARD IC101 TC94A70FG-006 (D, HZ (CD-MP3 PROCESSOR)
CD BOARD IC101 TC94A70FG-006 (D, HZ (CD-MP3 PROCESSOR)
Pin No.
Pin Name
I/O
Description
1
AVSS3
-
Ground terminal
2
RFZi
I
RF ripple zero crossing signal input terminal
3
RFRP
O
RF ripple signal output terminal
4
SBAD/RFDC
O
Sub beam addition signal or RF peak detection signal output terminal Not used
5
FEi
O
Focus error signal output terminal Not used
6
TEi
O
Tracking error signal output terminal
7
TEZi
I
Tracking error zero crossing signal input terminal
8
AVDD3
-
Power supply terminal (+3.3 V)
9
FOo
O
Focus coil drive signal output terminal
10
TRo
O
Tracking coil drive signal output terminal
11
VREF
I
Reference voltage (+1.65V) input terminal
12
FMo
O
Sled motor drive signal output terminal
13
DMo
O
Spindle motor drive signal output terminal
14
VSSP3
-
Ground terminal
15
VCOi
I
VCO control voltage input terminal
16
VDDP3
-
Power supply terminal (+3.3 V)
17
VDD1
-
Power supply terminal (+1.5 V)
18
VSS
-
Ground terminal
19
FGiN
I
FG signal input terminal Not used
20
IO0 (/HSO)
I
Disc inner position detection signal input terminal
21
IO1 (/UHSO)
O
Not used
22
XVSS3
-
Ground terminal
23
XI
I
System clock input terminal (16.9344 MHz)
24
XO
O
System clock output terminal (16.9344 MHz)
25
XVDD3
-
Power supply terminal (+3.3 V)
26
DVSS3
-
Ground terminal
27
RO
O
Audio data (R-ch) output to the input selector
28
DVDD3
-
Power supply terminal (+3.3 V)
29
DVR
O
Reference voltage (+1.65V) output terminal
30
LO
O
Audio data (L-ch) output to the input selector
31
DVSS3
-
Ground terminal
32
VDDT3
-
Power supply terminal (+3.3 V)
33
VSS1
-
Ground terminal
34
VDD1
-
Power supply terminal (+1.5 V)
35
VDDM1
-
Power supply terminal (+1.5 V)
36
SRAMSTB
I
S-RAM standby mode control signal input terminal Fixed at "L" in this set
37
XRST
I
Reset signal input from the system controller "L": reset
38, 39
BUS0, BUS1
I
Serial data input from the system controller
40
BUS2 (SO)
I
Serial data input from the system controller
41
BUS3 (SI)
I
Serial data input from the system controller
42
BUCK (CLK)
I
Serial data transfer clock signal input from the system controller
43
XCCE
I
Chip enable signal input from the system controller
44
TEST
I
Setting terminal for test mode Normally fi xed at "L"
45
IRQ
I
Interrupt request signal input terminal Not used
46
AoUT3 (PO4)
O
Request signal output terminal Not used
47
AoUT2 (PO5)
O
Audio data output terminal Not used
48
PIO0
O
Request signal output to the system controller
49, 50
PIO1, PIO2
O
Not used
51
PIO3
I
Gate signal input terminal Not used
52
VSS1
-
Ground terminal
53
VDDT3
-
Power supply terminal (+3.3 V)
54
SBSY
O
Subcode block sync signal output to the system controller
55
SBOK/FOK
O
Not used
56
IPF
O
Not used
57
SFSY/LOCK
O
Not used
58
ZDET
O
Zero detection signal output terminal Not used
59
GPIN
I
Not used
60
MS
I
Microcomputer interface mode selection signal input terminal Fixed at "H" in this set
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