Sony CMT-EP404 / HCD-EP404 Service Manual ▷ View online
29
HCD-EP404
6-12. IC Pin Function Description
• IC301
µ
PD780306GC-A68-8EU System Controller, Liquid Crystal Display Driver (DISPLAY Board)
Pin No.
1
2
3
4
5
6
7
8
9
10, 11
12
13
14
15
16
17
18
19
20
21
22
23 to 26
27
28 to 30
31
32 to 59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
I/O
I
I
I
I
I
I
I
–
–
O
–
O
I/O
O
O
O
O
O
O
O
O
O
O
I
–
O
O
O
O
O
O
–
I
–
I
I
I
I
I
O
O
I/O
I
O
–
I
O
–
I
Pin Name
KEY2
KEY3
KEY4
KEY5
ANALYSER
STATION
RDSDATA
AVDD
AVREF
CDOUT1, CDOUT2
VSS
TIME
CDDATA
CDRESET
REC-EN
INPINENA
REC-LED
SOUNDENA
PLLENA
MUTE
POWER
COM0 to COM3
BIAS
VLC0 to VLC2
VSS
LCD4 to LCD31
LCD32
LCD33
LCD34
LCD35
LCD36
NC
24/12
NC
AMS
RDS
BLINK
REC_RVS
DATAIN
DATAOUT
CLK
EEPROMDATA
STEREO
EEPROMCLK
VSS
X1
X2
VDD
XT1
Description
Key input terminal (A/D input) SW306 to SW309 (x , X , N , TUNER MEM/ENTER)keys input
Key input terminal (A/D input) SW310 to SW312 (PRESET +/–, DISPLAY)keys input
Key input terminal (A/D input)
SW313 to SW315 (TUNING – . m , TUNING + M >, MUSIC MENU)keys input
Key input terminal (A/D input) SW316, SW317 (MEGA BASS, z )keys input
Analyzer level detection signal input terminal (A/D input) Not used (open)
Tuning detection signal input from the LA1823 (IC101)(A/D input)
Selection data input from the Q301
Power supply terminal
Reference voltage input terminal for A/D converter
Not used (open)
Ground terminal
LED control signal output
Two-way data bus with the CD block
Reset signal output to the CD block “L ”:reset
Recording bias switch control signal output
Mega bass on/off selection signal output “H ”:mega bass on
LED control signal output
Function switch and electronic volume LC75392 (IC401) chip enable signal output
PLL chip enable signal output to the FM/AM PLL (IC102) “H ” active
Audio line muting on/off control signal output “H ”:muting on
System power on/off control signal output “H ”:power on
Common drive signal output to the liquid crystal display
Bias output for the liquid crystal display drive
Input terminal for liquid crystal display drive voltage
Ground terminal
Segment drive signal output to the liquid crystal display
Segment drive signal output to the liquid crystal display Mode selection signal output
Segment drive signal output to the liquid crystal display Mode selection signal output
Segment drive signal output to the liquid crystal display Mode selection signal output
Segment drive signal output to the liquid crystal display Mode selection signal output
Segment drive signal output to the liquid crystal display
Not used (open)
Mode switch detection signal input
Not used (open)
Half switch detection signal input
Not used (open)
Rec-proof switch detection signal input
Not used
Serial data input from the FM/AM PLL (IC102)
Serial data output to the FM/AM PLL (IC102) and LC75392 (IC401)
Serial data transfer clock signal output to the FM/AM PLL (IC102) and LC75392 (IC401)
Two-way data bus with the EEPROM (IC302)
FM stereo detection signal input from the LA1823 (IC101) “L ”:stereo
Clock signal output to the EEPROM (IC302)
Internal connection terminal (connected to ground)
Main system clock output terminal (4.194304 MHz)
Main system clock input terminal (4.194304 MHz)
Power supply terminal
Sub system clock input terminal (32.768 kHz) Not used (open)
30
HCD-EP404
Pin No.
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
I/O
O
I
I
I
I
I
I
I
I
O
O
O
O
I
I
I
–
I
Pin Name
XT2
RESET
REMOTEIN
POWERFAIL
RDSCLK
CDCLK
SENSORB
SENSORA
CD DOOR SW
CD-EN
SOL
TU-EN
MOTOR-ON
AMS.
ENCODERA
ENCODERB
AVSS
KEY1
Description
Sub system clock output terminal (32.768 kHz) Not used (open)
System reset signal input from the reset signal generator (IC304) “L ”:reset
For several hundreds msec. after the power supply rises, “L ” is input, then it changes to “H ”
Remote control signal input from the remote control receiver (X302)
Power failure detection signal input terminal “L ”:power failure, “H ”:power on
Serial data transfer clock signal input from the RDS decoder Not used
Serial data transfer clock signal input from the CD block
Tape sensor input terminal Not used (open)
Tape play/rec detect sensor input terminal “L ” input when the tape play/rec detect
CD lid open/close detect switch input terminal “L ”:CD lid is closed
Power control signal output for the CD block
Solenoid control signal output
Power control signal output for the tuner block
Capstan/reel motor control signal output
Not used
Jog dial pulse input from the rotary encoder (X303 VOLUME)(A phase input)
Jog dial pulse input from the rotary encoder (X303 VOLUME)(B phase input)
Ground terminal for A/D converter
Key input terminal (A/D input) SW301 to SW305 (I/1 , TUNER/BAND, TAPE, CD, PLAY MODE)keys input
31
HCD-EP404
NOTE:
•
•
-XX, -X mean standardized parts, so they may
have some differences from the original one.
have some differences from the original one.
•
The mechanical parts with no reference number
in the exploded views are not supplied.
in the exploded views are not supplied.
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.
dotted line with mark 0 are critical for safety.
Replace only with part number specified.
•
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.
7-1. Cabinet Section
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
12
5
1
2
8
7
6
#1
#1
#4
#2
#2
#2
#2
#3
#5
Front panel section
F202
T201
F201
CD cabinet section
#3
#3
#1
3
not
supplied
not
supplied
1
3-451-162-00 WASHER
2
4-235-952-01 AC CORD HOLDER
3
1-500-712-11 CORE, FERRITE
5
A-4729-695-A MAIN BOARD, COMPLETE
0 6
1-555-750-00 CORD, POWER (AEP)
0 6
1-696-535-11 CORD, POWER (UK)
7
4-235-974-01 CAB, ANTENNA COVER
8
1-823-170-11 CORD (WITH CONNECTOR) (FM ANT)
12
A-4729-696-A POWER BOARD, COMPLETE
0 F201
1-533-471-11 FUSE, GLASS TUBE (DIA. 5) T4AL/250V
0 F202
1-533-468-11 FUSE, GLASS TUBE (DIA. 5) T2AL/250V
0 T201
1-439-847-11 TRANSFORMER, POWER
#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
Ver 1.2 2003.01
32
HCD-EP404
7-2. Front Panel Section -1
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
51
4-241-113-01 VOL.ROTARY KNOB
53
4-241-112-01 VOL.DECORATION RING
54
4-241-380-01 DISPLAY WINDOW
55
4-236-899-01 DAMPER
56
4-240-240-01 CASS LID WINDOW
57
4-241-383-01 CASS LID
58
4-236-901-01 CASS LID BKT
59
4-236-904-01 CASS LID SPRING
60
4-236-915-01 MAIN PWB MOUNTING BKT (A)
62
4-236-906-01 CASS LID LATCH
63
4-236-905-01 CASS LATCH SPRING
64
4-236-907-01 CASS LID LATCH HOLDER
65
1-796-543-11 DECK, MECH (CFL4318)
73
4-240-261-01 TUNING SWING KNOB
75
4-240-276-01 TUNING KNOB SPRING
76
4-240-258-01 TUNING SWING LEVER
#1
7-685-534-14 SCREW +BTP 2.6X8 TYPE2 N-S
#2
7-685-647-14 SCREW +BVTP 3X10 TYPE2 SLIT
#12
7-685-854-04 SCREW +BVTT 2X8 (S)
54
55
64
63
62
56
57
58
59
73
75
76
60
65
51
53
#2
#2
#1
#12
not
supplied
including X303
Ver 1.1 2002.07
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