Sony CMT-EP303 / HCD-EP303 Service Manual ▷ View online
29
HCD-EP303
• IC Block Diagrams
IC101 LA1823
– MAIN Board –
24
23
FM
RF
1
AM
RF
GND2
2
VCC2
REG
3
AM
MIX
AM
OSC
OSC
BUFFER
4
22
21
VCC1
20
FM
OSC
PHASE
COMP
FM
MIX
DECODER
5
6
19
GND1
7
MUTE
8
18
17
16
9
15
PILOT
DET
14
FM
DET
13
10
FM
S-METER
11
12
ST
ST SW
FF
VCO
FF
FF
TRIG
AM
IF
AM
DET
AGC
FM
IF
SD
IF
BUFFER
FMRF IN
RF GND
FMRF OUT
VCC2
FM OSC
DET OUT
MUTE
R
L
AM/FM
MO/ST
FM DET
AMRF IN
REG
AM OSC
VCC1
FM MIX
GND
FM BUFFER
AM OSC BUFFER
AM MIX
QUAD
AMIF
SD
IC102 LC72131
PHASE
DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS
PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
CCB
INTERFACE
1
3 4 5 6
7 8 9 10
18
17
16
15
13
12
11
19
20
21
22
XOUT
VSS
AOUT
AIN
PD
VDD
FMIN
AMIN
14
NC
XIN
DO
CL
DI
CE
2
NC
IFIN
IO1
BO4
BO3
BO2
BO1
IO2
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
30
HCD-EP303
– CASSETTE Board –
IC203 LC75392
IC701 AN7312
+
–
3
6
9
12
15
2
5
8
11
14
1
4
7
10
13
28
25
22
19
16
29
26
23
20
17
30
27
24
21
18
+
–
+
–
–
+
–
–
LATCH
DECODER
CONTROL
SHIFT
REGISTER
–
+
LVROUT
LVRIN
LTOUT
LTCOM
LT4
LT3
LT2
LT1
L4
L3
L2
L1
VDD
CL
DI
RVROUT
RVRIN
RTOUT
RTCOM
RT4
RT3
RT2
RT1
R4
R3
R2
R1
VREF
VSS
CE
RIPPLE FILTER
ALC
14
13
12
1
2
3
11
10
9
AMP. CH2
AMP. CH1
8
4
5
6
7
VCC
RF
ALC IN2
OUT2
PC2
NF2
IN2
GND
ALC CONST
ALC IN1
OUT1
PC1
NF1
IN1
31
HCD-EP303
6-12. IC Pin Function Description
• IC601 µPD753016AGC-F37-3B9 SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER (DISPLAY BOARD)
I/O
O
O
O
I
O
O
O
O
—
O
O
O
O
I
O
O
I
I
I
I
I
O
O
O
O
I
O
O
I
—
I
O
—
I
O
I
I/O
—
I
I
I
O
Description
Segment drive signal output to the liquid crystal display (LD621)
Common drive signal output to the liquid crystal display (LD621)
Bias output for the liquid crystal display drive
Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
Power on/off control signal output for the tuner section “L ”:power on
Audio line muting on/off control signal output “L ”:muting on
Power on/off control signal output for the CD section “L ”:power on
LED drive signal output of the TIMER indicator (D619)“L ”:LED on
Ground terminal
Reset signal output to the CD section “L ”:reset
Not used (pull up)
PLL serial data transfer clock signal output to the FM/AM PLL (IC102)
PLL serial data output to the FM/AM PLL (IC102)
FM and AM signal meter voltage detection input from the LA1823 (IC101)
Serial data transfer clock signal output to the LC75392 (IC203)
Serial data output to the LC75392 (IC203)
FM stereo detection signal input from the LA1823 (IC101)“L ”:stereo
Serial data transfer clock signal input from the CD section
Serial data transfer clock signal input from the RDS decoder (IC604) (not used)
Remote control signal input from the remote control receiver (RM601)
Recording on detection signal input
Audio line muting on/off control signal output “H ”:muting on
PLL chip enable signal output to the FM/AM PLL (IC102)“H ” active
Chip enable signal output to the LC75392 (IC203)“H ” active
Not used (open)
Serial data input from the RDS decoder (IC604) (not used)
System power on/off control signal out “H ”:power on
Mega bass on/off selection signal output “H ”:mega bass on
CD lid open/close detection switch (SW600)input terminal “L ”:CD lid is closed
Power supply terminal
Power failure detection input terminal “L ”:power failure,“H ”:power on
Not used (open)
Internal connection terminal (connected to power supply)
Main system clock input terminal (6 MHz)
Main system clock output terminal (6 MHz)
PLL serial data input from the FM/AM PLL (IC102)
Two-way data bus with the CD section
Not used (open)
Not used (fixed at “H ”)
Key return signal input from the key matrix “L ” input when key pressing
System reset signal input from the reset signal generator (IC603)“L ”:reset
For several hundreds msec.after the power supply rises,“L ” is input,then it changes to “H ”
Segment drive signal output to the liquid crystal display (LD621)
Pin Name
S12 to S31
COM0 to COM3
BIAS
VLC0 to VLC2
TUNER
TAPE
CD
TIMER STATUS
VSS
CD-RESET
SURROUND
PLL CL
PLL DI
TUNER SD
CLOCK
DATA
STEREO
CD CLOCK
RDS CLOCK
REMOTE
SYNCRO
MUTE
PLLCE
CE
SHRST
RDS DATA
PSW
BASS BOOST
DPSW2/SLEND
VDD
XT1
XT2
IC
X1
X2
PLLDO SELECT
CD DATA
NC
12/24H SELECT
KEY R0 to KEY R4
CPU RESET
S0 to S11
Pin No.
1 to 20
21 to 24
25
26 to 28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64 to 67
68
69 to 80
NOTE:
•
-XX, -X mean standardized parts, so they may
have some differences from the original one.
have some differences from the original one.
•
Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
•
The mechanical parts with no reference number
in the exploded views are not supplied.
in the exploded views are not supplied.
•
Hardware (# mark) list and accessories and
packing materials are given in the last of this parts
list.
packing materials are given in the last of this parts
list.
32
HCD-EP303
SECTION 7
EXPLODED VIEWS
The components identified by mark
0
or
dotted line with mark
0
are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0
sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
le numéro spécifié.
•
Abbreviation
CND : Canadian model.
E51 : Chilean and Peruvian model.
MY : Malaysia model.
SP
CND : Canadian model.
E51 : Chilean and Peruvian model.
MY : Malaysia model.
SP
: Singapore model.
AR
: Argentine model.
MX : Mexican model.
AUS : Australian model.
AUS : Australian model.
7-1. Cabinet Section
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
12
5
1
2
11
9
8
7
6
#1
#1
#4
#2
#2
#2
#2
#3
#5
Front panel section
TR401
F401
F402
CD cabinet section
#3
#3
#1
3
1
3-451-162-00 WASHER
2
4-235-952-01 AC CORD HOLDER
3
1-500-712-11 CORE, FERRITE (AEP,UK)
5
A-4676-971-A MAIN BOARD, COMPLETE (AEP,UK)
5
A-4729-806-A MAIN BOARD, COMPLETE (EXCEPT AEP,UK)
0 6
1-555-750-00 CORD, POWER (AEP,E51,MY,SP)
0 6
1-696-535-11 CORD, POWER (UK)
0 6
1-696-966-31 CORD, POWER (AUS)
0 6
1-783-525-31 CORD, POWER (MX)
0 6
1-783-820-11 CORD, POWER (US,CND)
0 6
1-783-941-51 CORD, POWER (AR)
7
4-235-974-01 CAB, ANTENNA COVER
8
1-823-170-11 CORD (WITH CONNECTOR) (FM ANT)
9
4-235-972-01 REAR CABINET (AEP,UK)
9
4-241-498-01 REAR CABINET (EXCEPT AEP,UK)
11
4-240-251-01 POWER PWB MOUNT ING BKT.
12
A-4729-805-A POWER BOARD, COMPLETE (US,CND,MX)
12
A-4676-975-A POWER BOARD, COMPLETE
(EXCEPT US,CND,MX)
0 F401
1-533-470-11 FUSE, GLASS TUBE (DIA. 5) T3.15AL/250V
(EXCEPT US, CND, MX)
0 F401
1-533-690-11 FUSE, GLASS SYLINDRICAL (DIA. 5)
3.15A/125V (US, CND, MX)
0 F402
1-533-296-11 FUSE, GLASS SYLINDRICAL (DIA. 5)
2A/125V (US, CND, MX)
0 F402
1-533-468-11 FUSE, GLASS TUBE (DIA. 5) T2AL/250V
(EXCEPT US, CND, MX)
0 TR401
1-437-816-11 TRANSFORMER, POWER
(EXCEPT US, CND, MX)
0 TR401
1-437-818-11 TRANSFORMER, POWER (US, CND, MX)
#1
7-685-534-14 SCREW +BTP 2.6X8 TYPE2 N-S
#2
7-685-647-14 SCREW +BVTP 3X10 TYPE2 SLIT
#3
7-682-246-04 SCREW +K 3X5
#4
7-685-535-14 SCREW +BTP 2.6X10 TYPE2 N-S
#5
7-685-648-14 SCREW +BVTP 3X12 TYPE2 SLIT
#12
7-685-646-14 SCREW +BVTP 3X8 TYPE2 SLIT
The components identified by mark
0
or
dotted line with mark
0
are critical for safety.
Replace only with part number specified.
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