Sony CDP-EX77 / CDP-EX770 / DHC-EX77MD / DHC-MD77 / MHC-EX66 Service Manual ▷ View online
– 34 –
1
VDD
–
+5 V power supply
2
–
–
Connected to ground
3
DISC. SENS
I
Input of disc sensor signal
“L” : No disc, “H” : Disc present
4
TABLE. R
O
Output of disc table clockwise rotation
5
TABLE. L
O
Output of disc table counterclockwise rotation
6
JOG. 1
I
Encoder switch input B
7
JOG. 0
I
Encoder switch input A
8
BD. PWR
O
Output of power ON/OFF to BD block
“L” : OFF, “H” : ON
9
BD. RST
O
Output of Reset signal to BD block
“L” : Reset
10
RESET
I
Input of system Reset signal
“L” : Reset
11
X2
O
Main system clock (5MHz)
12
X1
I
13
GND
–
Ground
14
–
–
Not used (open)
15
ADJ
I
Pin for test mode
“L” : Test mode
16
VDD
–
+5V power supply
17
CLOCK
O
Output of serial clock to IC103 (DSP) and IC104 (D/A converter)
18
DATA
O
Output of serial data to IC103 (DSP) and IC104 (D/A converter)
19
SENS
I
Input of various status signals from IC103 (DSP) and IC104 (D/A converter)
20
XLT
O
Output of serial data latch pulse to IC103 (DSP) and IC104 (D/A converter)
21
PRGL
O
Output of serial data latch pulse to digital filter
22
SOCLK
O
Output of subcode Q data reading clock to IC103 (DSP)
23
–
O
Not used (open)
24
SUBQ
I
Subcode Q data serial input from IC103 (DSP)
25
AVSS
–
Ground (for A/D converter)
26
FCSSW
O
Output of focus gain selection switch
“L” : Normal, “H” : Down
27
–
–
Not used (open)
28
LOD. OUT
O
Output of disc tray loading out
29
LOD. IN
O
Output of disc tray loading in
30
OUT. SW
I
Input of disc tray open complete signal
“L” : Completed
31
KEY. 3
I
Key data A/D input 2
32
KEY. 2
I
Key data A/D input 1
33
KEY. 1
I
Key data A/D input 0
34
AVDD
–
+5 V analog power supply (for A/D converter)
35
AV. REF
I
Input of reference voltage (+5 V) (for A/D converter)
36
SCOR
I
Input of subcode sync S0, S1 detection
37
TABLE. SENS
I
Input of table address detection sensor
38
BUS. OUT
O
Output of audio bus signal
39
BUS. IN
I
Input of audio bus signal
40
VSS
–
Ground
Pin No.
Pin Name
I/O
Function
5-5.
IC PIN FUNCTION DESCRIPTION
•
DISPLAY BOARD
IC501 µPD780205GF-021-3BA (SYSTEM CONTROL, FL TUBE DISPLAY DRIVE)
– 35 –
Pin No.
Pin Name
I/O
Function
41
LED. JOG
O
Output of JOG LED drive
42
LED. ENT
O
Output of ENTER LED drive
43
E3
I
Disc tray address detection encoder input 2
44
E2
I
Disc tray address detection encoder input 1
45
E1
I
Disc tray address detection encoder input 0
46
VDD
–
+5 V power supply
47
LED. DP3
O
Output of DISC 3 pointer LED (green) drive
48
LED. DP2
O
Output of DISC 2 pointer LED (green) drive
49
LED. DP1
O
Output of DISC 1 pointer LED (green) drive
50
DE3
O
Output of DISC 3 yes/no LED (amber) drive
51
DE2
O
Output of DISC 2 yes/no LED (amber) drive
52
DE1
O
Output of DISC 1 yes/no LED (amber) drive
53–78
P35–P10
O
Output of FL display tube segments
79
V. LOAD
–
–30 V power supply for FL display tube
80–88
P9–P1
O
Output of FL display tube segments
89–100
12G–1G
O
Output of FL display tube grids
– 36 –
NOTE:
•
-XX and -X mean standardized parts, so they
may have some difference from the original
one.
may have some difference from the original
one.
•
Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color
Cabinet's Color
•
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 num-
ber in the exploded views are not supplied.
ber in the exploded views are not supplied.
•
Hardware (# mark) list are given in the last of
the electrical parts list.
the electrical parts list.
SECTION 6
EXPLODED VIEWS
(1) CHASSIS SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
4-985-912-01 PANEL, LOADING
2
3-363-099-01 SCREW (CASE 3 TP2)
3
4-977-698-11 CASE
* 4
4-977-697-41 PANEL, BACK
* 5
A-4699-658-A MAIN BOARD, COMPLETE
6
4-965-822-01 FOOT
7
4-977-699-11 LEG (F)
8
1-777-862-11 WIRE (FLAT TYPE) (19 CORE)
The components identified by mark
! or dotted line with mark ! are
! or dotted line with mark ! are
critical for safety.
Replace only with part number
specified.
Replace only with part number
specified.
3
2
4
2
1
7
6
8
#3
#2
not supplied
#2
#2
#2
#2
not supplied
#2
not supplied
CDM38A-5BD19
#2
#2
#2
#1
– 37 –
(2) FRONT PANEL SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
4-985-925-01 KNOB (JOG)
52
X-4947-654-1 PANEL ASSY, FRONT
53
4-962-708-01 EMBLEM (4-A), SONY
54
4-985-890-01 BUTTON (MODE)
55
4-951-620-01 SCREW (2.6X8), +BVTP
56
4-985-894-01 BUTTON (EDIT) (EX-CHANGE, SKIP)
57
4-985-909-01 BUTTON (CD3) (DISC1, DISC2, DISC3)
58
4-985-913-01 INDICATOR (CD)
59
4-985-910-01 BUTTON (O/C) (
§, OPEN/CLOSE)
60
4-985-911-01 BUTTON (EX)
61
X-4947-763-1 BUTTON (F/R) ASSY (
0, ))
62
4-985-892-01 BUTTON (PLAY) (
fl, p)
* 63
A-4699-278-A PANEL BOARD, COMPLETE
64
1-777-861-11 WIRE (FLAT TYPE) (29 CORE)
* 65
A-4699-659-A DISPLAY BOARD, COMPLETE
66
1-777-860-11 WIRE (FLAT TYPE) (9 CORE)
67
4-812-134-11 RIVET (DIA. 3.5), NYLON
68
4-987-952-01 INSULATOR
69
4-988-161-01 SPRING, RING
not supplied
not
supplied
supplied
55
63
66
55
64
67
68
55
65
61
62
60
59
58
57
56
54
53
52
51
69
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