Read Sony DHC-MD777 / HMC-MD777 Service Manual online
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Pin No.
Pin Name
I/O
Function
1, 2
OPEN
O
Not used (open)
3
LEDLAT
O
Serial data latch pulse output to the LED driver IC (IC661)
4
DRVCS
O
Chip select signal output to the FL driver IC (IC601) “L” active
5
RE
O
Output enable signal output to the static RAM (IC302) “L” active
6
WE
O
Data write enable signal output to the static RAM (IC302) “L” active
7
DRVRST
O
Reset signal output to the FL driver IC (IC601) and LED driver IC (IC661) “L”: reset
8
OPEN
O
Not used (open)
9
VDD
—
Power supply terminal (+5V)
10
BDRST
O
Reset signal output to the CXD2587Q (IC101) and BA5974FP (IC102) on the CD block
“L”: reset
“L”: reset
11
BDPWR
O
Power on/off control signal output terminal “L”: power on Not used (open)
12
DRVDAT
O
Serial data output to the FL driver IC (IC601) and LED driver IC (IC661)
13
DRVCLK
O
Serial data transfer clock signal output to the FL driver IC (IC601) and LED driver IC (IC661)
14
LOD POS
O
CD loading motor (M702) control signal output to the motor driver IC (IC702)
“L” active *1
“L” active *1
15
LOD NEG
O
CD loading motor (M702) control signal output to the motor driver IC (IC702)
“L” active *1
“L” active *1
16
CLP POS
O
CD elevator up/down motor (M701) control signal output to the motor driver IC (IC701)
“L” active *2
“L” active *2
17
CLP NEG
O
CD elevator up/down motor (M701) control signal output to the motor driver IC (IC701)
“L” active *2
“L” active *2
18
OUT SW
I
Detection input from the tray open/close detect switch (S708) on the CD mechanism block
“L”: when tray is open, “H”: when tray is close
“L”: when tray is open, “H”: when tray is close
19
IN SW
I
Detection input from the tray open/close detect switch (S704) on the CD mechanism block
“L”: when tray is close, “H”: when tray is open
“L”: when tray is close, “H”: when tray is open
20
MIDOUT SW
I
Detection input from the mid out detect switch (S701) on the CD mechanism block
“L”: when tray is going to open or close
“L”: when tray is going to open or close
21
MID SW
I
Detection input from the mid in detect switch (S703) on the CD mechanism block
“L”: when sub tray move between tray and stocker
“L”: when sub tray move between tray and stocker
22
TEST
I
Test input terminal (fixed at “L”)
23
ENCODE0
I
24
ENCODE1
I
25
ENCODE2
I
26
INIT SW
I
Detection input from the INIT detect switch (S705) on the CD mechanism block
“L”: when elevator down to bottom, others: “H”
“L”: when elevator down to bottom, others: “H”
27
ADJ
I
Setting terminal for the CD test mode Normally: fixed at “H” (“L”: test mode)
28
AMUTE
O
Analog muting on/off control signal output terminal Not used (open)
29
DATA
O
Serial data output to the CXD2587Q (IC101) on the CD block
30
CLK
O
Serial data transfer clock signal output to the CXD2587Q (IC101) on the CD block
31
XLT
O
Serial data latch pulse output to the CXD2587Q (IC101) on the CD block
32
PANEL SW
I
Detection input from the CD tray door open/close detect switch (S702)
“L”: when CD lid is open, “H”: when CD lid is close
“L”: when CD lid is open, “H”: when CD lid is close
Detection input from the disc tray address detect rotary encoder (S707) on the CD mechanism
block
block
MICROCOMPUTER BOARD IC300
µ
PD784215AYGF-501-3BA
(MASTER CONTROLLER (CD MECHANISM CONTROL))
*1 CD loading motor (M702) control
Loading
Eject
Stop
Brake
LOD NEG (pin !∞)
“L”
“H”
“H”
“L”
LOD POS (pin !¢)
“H”
“L”
“H”
“L”
Mode
Terminal
*2 CD elevator up/down motor (M701) control
Elevator
Up
Elevator
Down
Stop
Brake
CLP NEG (pin !¶)
“L”
“H”
“H”
“L”
CLP POS (pin !§)
“H”
“L”
“H”
“L”
Terminal
Mode
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