Sony DHC-EX880MD / DHC-MD717 / TA-EX880 / TA-MS717 Service Manual ▷ View online
– 5 –
MAIN BOARD
BACK PANEL
4
claw
1
connector
(CN911)
(CN911)
1
connector
(CN601)
(CN601)
5
Remove the back
panel to direction
of arrow
panel to direction
of arrow
A
.
3
screw
(BV3
(BV3
×
8)
2
five screws
(BV3
(BV3
×
10)
2
three screws
(BV3
(BV3
×
10)
A
3
Remove the main board
to direction of arrow
to direction of arrow
A
.
1
two screws
(BV3
(BV3
×
16)
2
four screws
(BVTT3
(BVTT3
×
6)
A
– 6 –
SECTION 4
DIAGRAMS
• Circuit Boards Location
SECONDARY board
PANEL board
VOL board
MAIN board
SW board
CONNECTOR board
PRIMARY board
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Semiconductor
Location
Ref. No. Location
D301
H-4
D302
H-4
D315
J-5
D351
E-4
D352
E-4
D365
J-5
D702
E-5
D801
E-2
D802
E-2
D803
E-2
D804
F-2
D808
E-13
D809
I-4
D810
I-3
D813
E-2
D818
E-14
D819
I-4
D820
I-3
IC301
F-5
IC501
C-2
IC502
C-1
IC503
C-2
IC504
J-2
IC505
C-1
IC701
J-3
IC802
H-3
Q301
H-4
Q302
I-5
Q303
I-5
Q351
E-4
Q501
J-2
Q502
J-2
Q503
J-1
Q504
J-3
Q554
J-3
Q809
I-3
Q819
I-3
– 17 –
4-5.
IC PIN FUNCTION DESCRIPTION
•
PANEL BOARD IC101
µ
PD78082GB-A293BSMTX (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Function
1 to 3
—
I
Not used (fixed at “L”)
4
DESTINATION
I
Input terminal for the destination setting (fixed at “L”)
5
AC3 VOL
I
Detection input of the VOLUME (RV204) position “L”: minimum, “H”: maximum
6
—
I
Not used (fixed at “L”)
7
FUNCTION/C
O
Function select signal output terminal (C) *1
8
FUNCTION/B
O
Function select signal output terminal (B) *1
9
FUNCTION/A
O
Function select signal output terminal (A) *1
10, 11
—
I
Not used (fixed at “L”)
12 to 15
DATA 0 to
DATA 3
I/O
Two-way data bus with the system control bus
16
LED-CLK
O
Serial data transfer clock signal output to the LED driver (IC102)
17
VSS
—
Ground terminal
18
LED-DATA
O
Serial data output to the LED driver (IC102)
19
LED-LATCH
O
Serial data latch pulse output to the LED driver (IC102)
20
LED-RESET
O
Reset signal output to the LED driver (IC102) “H”: reset
21
LINE-MUTE
O
Line muting on/off control signal output terminal “L”: line muting on
22
DIRECT
O
Source direct function on/off control signal output terminal “H”: source direct on
23
GND
—
Ground terminal
24
DBFB-SW
O
DBFB function on/off control signal output terminal “L”: DBFB on
25
DBFB-LEVEL
O
DBFB sensibility selection signal output terminal “L”: DBFB high, “H”: DBFB low
26
MUTE–20dB
O
Attenuator control (–20 dB) signal output terminal “L”: attenuate (–20 dB) on
27
VOL-LOUD
O
Motor control signal output to the volume control motor driver (IC104) “H” active
28
VOL-WEAK
O
Motor control signal output to the volume control motor driver (IC104) “H” active
29
AC3
O
Dolby surround (AC-3) system control output terminal “L” active
30
AC-CUT
I
AC off detection signal input terminal “L”: AC off
31
Y-BUS-CLK
I/O
Bus data transfer/reading clock signal in/out terminal for the system control bus
32
Y-BUS-BUSY
I/O
Busy signal in/out terminal for the system control bus
33
—
I
Not used (fixed at “L”)
34
GND
—
Ground terminal
35
RESET
I
System reset signal input from the reset signal generator (IC103) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
36
GND
—
Ground terminal
37
X2
O
Main system clock output terminal (5 MHz)
38
X1
I
Main system clock input terminal (5 MHz)
39
VDD
—
Power supply terminal (+5V)
40
AVDD
—
Power supply terminal (+5V) (for A/D converter)
41
AVREF
I
Reference voltage (+5V) input terminal (for A/D converter)
42
GND
—
Ground terminal
43
KEY 1
I
Key input terminal (A/D input) (S101 and S102) FUNCTION
>, FUNCTION . keys input
44
KEY 2
I
Key input terminal (A/D input) (S103 to S105)
–20dB MUTING, SOURCE DIRECT, DBFB keys input
–20dB MUTING, SOURCE DIRECT, DBFB keys input
*1 Function select control
Function
Terminal
FUNCTION/A (pin 9)
“H”
“L”
“L”
“H”
“L”
“H”
“H”
FUNCTION/B (pin 8)
“L”
“H”
“L”
“H”
“H”
“H”
“L”
FUNCTION/C (pin 7)
“L”
“L”
“H”
“H”
“H”
“L”
“H”
( ): TA-MS717
TUNER
CD
MD
TAPE
VIDEO 1
(CS/BS)
VIDEO 2
(LD/DVD)
VIDEO 3
(VIDEO)
(VIDEO)
– 18 –
• IC Block Diagrams
IC102
M66310FP (PANEL BOARD)
IC104
BA6208 (VOL BOARD)
IC202, 203
BA3129 (PANEL BOARD)
IC701
µPC1237HA (MAIN BOARD)
24
0
D
R
CK
23
0
D
R
CK
22
0
D
R
CK
21
0
D
R
CK
20
0
D
R
CK
19
0
D
R
CK
18
0
D
R
CK
17
0
D
R
CK
16
0
D
R
CK
15
0
D
R
CK
14
0
D
R
CK
13
4
5
6
7
8
9
10
11
12
0
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
1
D
R
CK
D
1
R
CK
D
1
0
0
R
CK
D
R
CK
D
R
CK
1
2
3
D
1
R
CK
D
1
0
0
R
CK
D
R
CK
D
R
CK
QC
QD
QE
QF
QG
QH
QI
QJ
QK
QL
QM
QN
QA
QB
VCC
D
ATA
OE
LT
RST
CLK
GND
SQP
QO
QP
1
2
3
4
5
6
7
8
9
NC
OUTPUT 2
Vcc
GND
NC
INPUT 2
INPUT 1
NC
MOTOR
DRIVE
MOTOR
DRIVE
REG
SWITCH
SWITCH
OUTPUT1
8
+
–
+
–
+
–
+
–
1
2
3
4
5
9
10
14
13
12
11
6
7
+IN2A
–IN2A
+IN2B
–IN2B
OUT2
SW2
VCC
VEE
SW1
OUT1
–IN1B
+IN1B
–IN1A
+IN1A
1
2
3
4
5
6
7
8
OVER LOAD DET
F/F
OFFSET DET
LATCH/
AUTORESET
V
CC
ON
MUTE
AC OFF
DET
V
CC
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