Sony DHC-EX880MD / DHC-MD717 / MDS-EX880 / MDS-MS717 Service Manual ▷ View online
– 63 –
Pin No.
Pin Name
I/O
Function
42
SCTX
O
Recording data output enable signal output to the CXD2652AR (IC121) and overwrite head
driver (IC181) Writing data transmission timing output (Also serves as the magnetic head on/off
output)
driver (IC181) Writing data transmission timing output (Also serves as the magnetic head on/off
output)
43
—
I
Not used (fixed at “L”)
44
WRPWR
O
Laser power select signal output to the CXD2652AR (IC121) and HF module switch circuit
“H”: recording mode, “L”: playback mode
“H”: recording mode, “L”: playback mode
45
MNT3
I
Monitor signal input from the CXD2652AR (IC121)
46
MNT2
I
Busy signal input from the CXD2652AR (IC121)
47
MNT1
I
Track jump detection signal input from the CXD2652AR (IC121)
48
MNT0
I
Focus OK signal input from the CXD2652AR (IC121)
“H” is input when focus is on (“L”: NG)
“H” is input when focus is on (“L”: NG)
49
LDON
O
Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
Laser modulation select signal output to the HF module switch circuit
Playback power: “H”, Stop: “L”,
Recording power:
50
MOD
O
51
LDIN
O
Loading motor control signal output terminal Not used (open)
52
LDOUT
O
Loading motor control signal output terminal Not used (open)
53
LD-LOW
O
Loading motor drive voltage control signal output terminal Not used (open)
54
PROTECT
I
Rec-proof claw detect input from the protect detect switch (S683) “H”: write protect
55
REFLECT
I
Detection input from the disc reflection rate detect switch (S682)
“L”: high reflection rate disc, “H”: low reflection rate disc
“L”: high reflection rate disc, “H”: low reflection rate disc
56
PACK-IN
I
Detection input from the disc detect switch Not used (fixed at “H”)
57
PACK-OUT
I
Detection input from the loading-out detect switch “L” at a load-out position, others: “H”
Not used (fixed at “H”)
Not used (fixed at “H”)
58
CHACK-IN
I
Detection input from the disc chucking-in detect switch “L”: chucking
Not used (fixed at “H”)
Not used (fixed at “H”)
59
LIMIT-IN
I
Detection input from the sled limit-in detect switch (S681)
The optical pick-up is inner position when “L”
The optical pick-up is inner position when “L”
60
REC.P
I
Detection input from the recording position detect switch Not used (fixed at “H”)
61
PB.P
I
Detection input from the playback position detect switch Not used (fixed at “L”)
62
+3.3V
—
Power supply terminal (+3.3V)
63
—
I
Not used (fixed at “L”)
64
GND
—
Ground terminal
65 to 72
—
I
Not used (fixed at “L”)
73
HEAD SW UP
I
Detection input from the overwrite head up position detect switch (S6)
The overwrite head is up position when “L”
The overwrite head is up position when “L”
74
HEAD SW
DOWN
I
Detection input from the overwrite head down position detect switch (S7)
The overwrite head is down position when “L”
The overwrite head is down position when “L”
75
HEAD UP
O
Motor control signal output to the overwrite head up/down motor driver (IC172) *1
76
HEAD DOWN
O
Motor control signal output to the overwrite head up/down motor driver (IC172) *1
77, 78
—
I
Not used (fixed at “L”)
79
SDA
I/O
Two-way data bus for the EEPROM (IC171)
80
SCL
O
Clock signal output to the EEPROM (IC171)
2 sec
0.5 sec
– 64 –
Pin No.
Pin Name
I/O
Function
81
—
I
Not used (fixed at “L”)
82
—
I
Not used (fixed at “H”)
83
MODE
I
Input terminal for setting mini-disc single mode or changer mode
“L”: mini-disc single mode, “H”: changer mode (fixed at “H” in this set)
“L”: mini-disc single mode, “H”: changer mode (fixed at “H” in this set)
84, 85
—
I
Not used (fixed at “L”)
86
REC/PB
O
Record/playback control signal output terminal Not used (pull down)
87
DOUTXMUTE
O
Muting control signal output terminal Not used (pull down)
88 to 90
—
I
Not used (fixed at “L”)
91 to 93
KEY0 to KEY2
I
Key input terminal Not used (fixed at “H”)
94, 95
—
I
Not used (fixed at “L”)
96
AVSS
—
Ground terminal
97
—
I
Not used (fixed at “L”)
98
VREF
I
Reference voltage (+3.3V) input terminal
99
+3.3V
—
Power supply terminal (+3.3V)
100
—
I
Not used (fixed at “L”)
*1 Overwrite head up/down motor (M905) control
HEAD UP (pin &∞)
“H”
“L”
“H”
“L”
HEAD DOWN (pin &§)
“L”
“H”
“H”
“L”
Function
Terminal
HEAD UP
HEAD DOWN
BRAKE
RUN IDLE
– 65 –
SECTION 7
EXPLODED VIEWS
The components identified by
mark
mark
! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
specified.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference num-
ber in the exploded views are not supplied.
• Hardware (# mark) list is given in the last of
the electrical parts list.
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
(1) CHASSIS SECTION
2
MDM-C1C
not supplied
1
3
2
5
4
#2
#3
#1
#1
#2
not
supplied
supplied
not supplied
#2
#1
#1
#1
FRONT PANEL SECTION
not supplied
not supplied
9
#2
#2
8
7
6
1
X-4949-526-1 FOOT (F) ASSY
2
3-363-099-01 SCREW (CASE 3 TP2)
* 3
3-939-652-11 CASE
4
1-783-038-11 WIRE (FLAT TYPE) (17 CORE)
* 5
4-995-076-11 PANEL (MDS), BACK (EX880)
* 5
4-995-076-21 PANEL (MDS), BACK (MS717)
* 6
A-4407-881-A MAIN BOARD, COMPLETE
7
1-783-037-11 WIRE (FLAT TYPE) (23 CORE)
* 8
4-968-100-01 SUPPORT, PC
9
4-965-822-01 FOOT
– 66 –
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
(2) FRONT PANEL SECTION
51
54
55
53
52
56
61
60
57
58
73
72
65
65
71
70
69
65
68
66
65
64
63
62
67
59
74
#2
51
X-4949-062-1 LID (F) ASSY
52
4-995-071-01 PLATE (LID), ORNAMENTAL
53
4-995-073-01 INDICATOR (LID)
* 54
1-667-936-11 LED BOARD
55
1-668-027-13 FLEXIBLE BOARD
56
4-995-070-01 LID (R)
57
4-995-074-01 KNOB (JOG)
58
4-988-161-01 SPRING, RING
59
4-995-081-01 LATCH, DC
60
X-4949-026-1 PANEL ASSY, FRONT
61
4-962-708-01 EMBLEM (4-A), SONY
62
4-948-109-01 GEAR
63
3-701-438-21 WASHER (E-2.3), NYLON
64
X-4949-063-1 BRACKET (GEAR) ASSY
65
4-951-620-01 SCREW (2.6X8), +BVTP
66
3-354-963-21 DAMPER
67
1-783-040-11 WIRE (FLAT TYPE) (13 CORE) (160mm)
68
4-995-075-01 KNOB (REC)
* 69
A-4724-095-A PANEL (L) BOARD, COMPLETE
70
1-783-041-11 WIRE (FLAT TYPE) (9 CORE)
* 71
A-4724-097-A PANEL (FL) BOARD, COMPLETE
* 72
A-4724-096-A PANEL (R) BOARD, COMPLETE
73
1-783-039-11 WIRE (FLAT TYPE) (11 CORE)
74
4-951-620-41 SCREW (2.6), +BVTP
Click on the first or last page to see other DHC-EX880MD / DHC-MD717 / MDS-EX880 / MDS-MS717 service manuals if exist.