Sony SDP-EP70, SDP-EP90ES Service Manual
MICROFILM
SDP-EP70/EP90ES
SERVICE MANUAL
Photo: SDP-EP90ES (GOLD)
AEP Model
UK Model
Australian Model
SPECIFICATIONS
DIGITAL SURROUND PROCESSOR
– 1 –
SECTION 1
SERVICING NOTE
TABLE OF CONTENTS
1. SERVICING NOTE ..........................................................2
2. GENERAL .......................................................................... 3
3. TEST MODE .....................................................................13
4. DIAGRAMS
4-1. Circuit Boards Location ...................................................... 16
4-2. Brock Diagrams
• DA Section.......................................................................17
• AC-3 (RF) Section ........................................................... 19
• Decoder Section ............................................................... 21
• Control Section ................................................................23
• Power Section ..................................................................25
4-3. Schematic Diagram – Input Section – ................................ 29
4-4. Schematic Diagram – Dolby AC-3 Section – ..................... 31
4-5. Schematic Diagram — DA Converter Section –.................33
4-6. Schematic Diagram – Output Section – .............................. 35
4-7. Printed Wiring Board – Main Section – (Side A) ............... 37
Printed Wiring Board – Main Section – (Side B) ............... 39
4-8. Schematic Diagram – Decoder Section –............................41
4-9. Printed Wiring Board – Decoder Section – ......................... 43
4-10. Schematic Diagram – Display Section – .......................... 45
4-11. Printed Wiring Board – Display Section – ....................... 47
4-12. Schematic Diagram – Power Section – ............................49
4-13. Printed Wiring Board – Power Section – .........................51
4-14. Schematic Diagram – Control SW Section – ...................53
4-15. Printed Wiring Board – Control SW Section – ................54
4-16. IC Pin Functions ............................................................... 55
4-17. IC Block Diagrams ........................................................... 72
5. EXPLODED VIEWS
5-1. Case and Front Panel Section ............................................. 76
5-2. Chassis Section ................................................................... 77
RV901 of Main Board
RV901 of the main board requires no adjustments. Please note that
it should be dixed to mechanical center position when you moved
and do not know origin position.
Parts Location:
[MAIN BOARD] – SIDE A –
RV901
No Adjustment
Connection and Test Disc
Connection of this unit to a AC-3 Dolby surround equipment will
realize outstanding sound playback.
Check if the respective surround channel outputs are playing back
normally by the following method.
Jig :
Discription Part No.
AC-3 TEST LD J-2501-132-A
Connected Equipment:
6. ELECTRICAL PARTS LIST ........................................78
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
AC-3 LD player
(This unit is also compatible with the digital versatile disc player
(DVD). The DVD must be checked with the LD player using all
the circuits of this unit.)
Connecting Method:
AC-3 RF output terminal Coaxial digital
connecting cable VMC-10G, etc. (Optional)
AC-3 compatible
LD player
AC-3 RF
output terminal
Checking Method:
Play back a test disc of the LD player, and check if the contents
recorded on the disc case (printed on the disc case) are played
back normally.
AC-3 RF
input terminal
Unit
– 2 –
– 3 –
SECTION 2
GENERAL
– 4 –
– 5 –
– 6 –
– 7 –
– 8 –
– 9 –
– 10 –
– 11 –
– 12 –
SECTION 3
TEST MODE
Self-Diagnosis and Test Mode
This unit is provided with a “self-diagnosis and self-recovery function” which detects DSP errors and automatically recovers the unit,
and a test mode for performing operation checks during repairs.
1. Main Functions
• DSP self-diagnosis and self-recovery function
• Self-diagnosis for servicing and error message display
• Display of history of past DSP errors
• Various operation check mode
• SRAM, EEPROM check function
• Initialization (Differs according to country)
VOLUME LED
2. Entering the Test Mode
1. While pressing the AC-3 RF button and DIGITAL 2 button
simultaneously in the power OFF state, press the POWER b utton.
2. When the V OLUME LED star ts blinking, release these buttons.
The self-diagnosis for servicing will be executed, and the operation check mode will be set.
(NOTE: Performing initialization will erase the error history.
Do not therefore press the wrong buttons. For details, refer to
“5. Initialization” on page 15.)
3. Self-diagnosis Mode for Servicing/Display of
History of DSP Errors
3-1. Self-diagnosis Mode for Servicing
Before entering the test mode, first the follo wing self-diagnosis program for servicing will be run.
1. Checks if unintended buttons are being pressed
2. Checks EEPROM (External memory device) operation
3. Read/write test of DSP external memory (1M SRAM)
4. Checks and displays history of various DSP abnormal operations
• When an error is detected:
The error message is displayed for about 8 seconds on the fluorescent display tube, it is switched to “MPEG/DOLBY DIGIT AL”,
and the operation check mode is set. (See Table 1.)
When several errors occur at the same time, only the first error
detected will be displayed.
• When no error is detected:
“Ver. main X. X mpe g X. X” will be displayed, and the operation
check mode will be set. (X. X means its version No.)
Table-1:
Error Message/Fluorescent Display Tube
VOLUME LED blinks
and fluorescent display
tube is OFF*
An unintended button is pressed, or connection fault of flexible board between MAIN
board and DISPLAY board.
Possible Reasons
Soldering fault or malfunction between IC202
EEPROM read error!
EEPROM write error!
S-RAM access error!
DSP error detected!
(MAIN board AT24C02) and IC201 (MAIN
board microprocessor).
Reached end of IC202 (MAIN board
AT24C02) writing life or incorrect insertion
of part.
Soldering fault between IC422 (MAIN part 1M
SRAM) and IC423 (MAIN board SSP424023)
When a DSP error is detected
(Refer to “3-2. Display of History of Abnor mal
DSP Operations”.)
*NOTE:
Refer to “6. Check of Pressing of Unintended Button” on page 15.
– 13 –
3-2. Display of History of DSP Operations
• When “DSP error detected!” is displayed on the fluorescent display tube, the history of DSP errors will be displayed eight seconds
later. (See Fig. 1.)
• This history will be displayed if a DSP error has occurred in the
past. It helps the detection of malfunction parts by enabling past
problems of the unit to be checked.
• This history shows the “Cause of error” and “How many times
occurred” for the two DSPs. (See Fig. 1.)
Fig. 1
Corresponding DSP
Contents of fluores-
cent display tube
How to read the
display
: 1st DSP (DSP56009) 2nd DSP (SSP424023)
: 123x0000 123x0000
↑
↑
↑
↑↑
:
Number of times the error has occurred
↑
↑
4
3
2
1
↑
↑
4
3
2
↑
1
How to read the display
• The left side shows the errors of the first DSP (DSP56009:MAIN
board IC424) and the right side shows the errors of the second
DSP (SSP424023:MAIN board IC423).
• The “How many times occurred” indicates the number of times
that the error has occurred. If an error has occurred more than
256 times, it will be displayed as 256.
• The 1 2 3 4 part shows 0 or 1 according to the cause of the
error. If an error has occurred, 1 will be displayed. If no error has
occurred, 0 will be displayed. (See Table-2.)
Table-2:
Cause of error Possible cause
1 Failed in initial
booting
2 DSP does not
operate
3 Communication
port malfunction
4 No reply from DSP
Mostly due to faulty connection (soldering) between DSP and microprocessor
Faulty DSP clock (X401 and onwards), faulty
DSP part, etc.
Overrunning of DSP due to heat, microprocessor bugging, or IC301 (MAIN board PLL) is
faulty
Faulty DSP part, or faulty microprocessor part,
etc.
4. Operation Check Mode
• During the operation check mode, functions can be set by pressing the corresponding button. (See Table-3.)
• Each time a button is pressed, the corresponding function will be
displayed for about 8 seconds.
• Buttons other than those displayed in Table-3 operate usually.
NOTE: Do not press the SET UP button during the operation
check mode. As this button is provided with a special
function for debugging, pressing it may impede the normal
output of signals in the sub-woofer mode.
Table-3:
Fluorescent
Button
DIGITAL2
DIGITAL3
DIGITAL4
OFF
By pressing the MENU knob and displaying “<<< LEVEL ADJUST >>>”,
and rotating the +/– knob to the right, the input signal selected at that time
can be output to any Lch or Rch channel.
(See Table-4.)
Display T ube
Display
DIG-2
(L-SL, R-SR)
DIG-3
(L-C, R-SW)
DIG-4
(L, R-ALL)
Whole fluorescent display tube lit check
Each time the button is pressed, the fluorescent display tube
lights up as follows.
Lit totallynLit partially 1nLit partially 2nLit totally ....
Outputs the Lch DIGITAL-2 input signal
to the REAR Lch and the Rch to the REAR
Rch.
Outputs the Lch DIGITAL-3 input signal
to the CENTER and the Rch only to the
WOOFER.
Outputs the Lch DIGITAL-4 input signal
to the FRONT Lch, REAR Lch, CENTER,
and the Rch to the FRONT Rch, REAR
Rch, and CENTER.
Function
Table-4:
Fluorescent Display
Tube Display
Exchange (L-SL, R=SR)
Output Destination of Input Signal
Outputs the FRONT Lch/Rch signal only to
the REAR Lch/Rch.
NOTE: This history is memorized in the EEPROM until the unit
is initialized. (Refer to “5. Initialization” on page 15.)
– 14 –
Exchange (L-C, R=SW)
Exchange (NORMAL)
Exchange (L, R-ALL)
Outputs the FRONT Lch signal only to the
REAR Lch, and FRONT Rch signal to the
REAR Rch.
Outputs the FRONT Lch/Rch signal to the
FRONT Lch/Rch, the REAR Lch/Rch signal
to the REAR Lch/Rch, the CENTER signal to
CENTER, and the WOOFER signal to
WOOFER as usual.
Outputs the FRONT Lch signal to the FR ONT
Lch, REAR Lch, and CENTER, and the
FRONT Rch signal to the FRONT Rch, the
REAR Rch, WOOFER.
5. Initialization (Differs according to destination)
After executing the test mode, be sure to perform initialization.
• For J/SP/AEP Version (Use this procedure)
While pressing the AC-3 RF button and DIGITAL3 buttons
simultaneously, press the POWER button. When the VOLUME
LED starts blinking, release the buttons. “initialized (J/SP/AEP)”
will be displayed on the fluorescent display tube, and all internal
settings will be returned to the initial values.
• For U/CA version (Do not use this procedure)
While pressing the AC-3 RF button and DIGITAL4 buttons
simultaneously, press the POWER button. When the VOLUME
LED starts blinking, release the buttons. “initialized (U/CA)” will
be displayed on the fluorescent display tube, and all internal settings will be returned to the initial values.
NOTE: As all histories of abnormal DSP operations will be erased,
note down the contents of the history beforehand.
6. Check of Pressing of Unintended Button
• This check is always performed when the power is turned ON.
Therefore when an error occurs, it can be known without setting
the test mode because the V OLUME LED blinks and the fluorescent display tube stops displaying.
• When an unintended button is pressed during the test mode or
initialization, the V OLUME LED also blinks, and the fluorescent
display tube stops displaying, preventing no mode to be set.
7. Other Functions
In the personal use of the unit at home, if no sounds are produced
due to DSP problems, the DSP will be rebooted automatically to
attempt recovery. If no sounds are still produced after five retries,
“Turn PO WER SW off!” will be displayed on the fluorescent display
tube.
If this problem occurs, it indicates that the DSP is faulty or the
user’s setting environment may be unsuitable. Refer to “3. SelfDiagnosis Mode for Servicing/Display of History of DSP Errors”
on page 13 to identify the problems.
– 15 –
4-1. CIRCUIT BOARDS LOCATION
SECTION 4
DIAGRAMS
SW board
AC2 board
PS board
DECODER board
AC1 board
TR board
MAIN board
VOL board
DISPLAY board
– 16 –
SDP-EP70/EP90ES
4-2. BLOCK DIAGRAMS
– DA SECTION –
INPUT
DOLBY
AC-3
SECTION
C
(Page 20)
D
CONTROL
SECTION
(Page 23)
E
CONTROL
SECTION
(Page 23)
F
CONTROL
SECTION
(Page 24)
09
DIGITAL 1
DIGITAL
INPUT
IC306
DIGITAL 2
DIGITAL
INPUT
IC305
DIGITAL 3
DIGITAL
INPUT
IC304
DAO
DSELA0
DSELA1
DIRCLK
DIRLAT
DIWDAT
DIRDAT
DIRERR
DIRRST
ANADIG
EXTAL
SRCINI
DF-DAT
DF-CLK
DF-LAT
DF-INI
DA-LAT
DA-CLK
DA-DAT
F. 8DB
R. 8DB
C/S.8DB
F. 4DB
R. 4DB
C/S. 4DB
MUT
RY-OFF
J301
3OUT
3OUT
3OUT
INPUT 4
ATT
SHIFT
LATCH
INIT
ST
CK
DT
5
D1
4
D2
3
D3
6
D0
3
SELECTOR
IC302
A0
14
BUFFER
IC307
(Page 23)
DIGITAL AUDIO
INTERFACE RECEIVER
IC301
DIN2
DIN1
SCLK
XLAT
SWDT
SRDT
EROR
XMODE
DATAO
E/D OUT
AVOCK
LRCK
BCK
FS128
23
3
11
22
21
20
7
Y
A1
2
2
2
1
14
15
16
17
24
10
10
1
OUTPUT
REC OUT
OUTPUT
SELECTOR
B2 Y2
VIN
DIGITAL
IC303
3
6
13
IC404
(1/2)
SELECTOR
IC404 (2/2)
B0
B1
B3
SA0A1
1
CONTROL
9
(Page 24)
CONTROL
SECTION
SUPER WOOFER
DECODER
SECTION
(Page 21)
Y0
Y1
Y2
5
2
SECTION
A
DATA
BCKO
LRCKO
B
SOA
SOB
SOC
CENTER
DATA
128FS
LRCK
BCK
J
4
7
12
BCK
LRCK
128FS
1
2
3
7
1
2
3
7
DATAI
LRCKI
BCKI
FI128
DATAI
LRCKI
BCKI
FI128
SAMPLING RATE
CONVERTER
IC401
SAMPLING
RATE
CONVERTER
SAMPLING
RATE
COUNTER
FLAME
COUNTER
INIT
10
BUFFER
IC408
65
SAMPLING RATE
CONVERTER
IC403
SAMPLING
RATE
CONVERTER
SAMPLING
RATE
COUNTER
FLAME
COUNTER
INIT
10
DATAO
LRCKO
BCKO
DATAO
LRCKO
BCKO
XI
30
32
31
XI
13
10 11
30
32
31
13
DIGITAL FILTER, D/A CONVERTER
DATAI
40
LRCKI
39
BCKI
38
512FSO
45
IC425
13
1
2
13
12
3
4
9
8
40
39
38
45
12
DIGITAL FILTER, D/A CONVERTER
DATAI
LRCKI
BCKI
512FSO
DIGITAL
FILTER
CLOCK
GENERATOR
XIN
10
FILTER
F404
1
FILTER
F401
FILTER
F402
IC407
DIGITAL
FILTER
CLOCK
GENERATOR
IC405
MODE
8
9
2
49.152MHz
MODE
D/A
CONVERTER
SHIFT
ATT
34 35 36 37
X401
D/A
CONVERTER
SHIFT
ATT
34 35 36 37
LATCH
LATCH
R1(+)
R1(-)
R2(+)
R2(-)
R1(+)
R1(-)
R2(+)
R2(-)
XIN
21
23
18
16
INIT
D/A
CONVERTER
IC421
21
23
18
16
10
INIT
25
24
27
28
REAR
L-CH
IN1+
IN1-
IN2+
IN2-
DIGITAL VOLUME
IC410
ECL
SW
VOLUME
CONTROL
VCNT
12
15
1
D/A
CONVERTER
SHIFT
REGISTER
LEVEL
SHIFT
CK
DT
ST
1 3
2
IO1IO2+
IO2IO1+
4
5
2
1
+
+
MUT
RY-OFF
REAR L-CH
MUT
RY-OFF
CENTER
MUT
RY-OFF
IC416
L.P.F.
L.P.F.
RY608
5
F.8DB
F.4DB
R.8DB
R.4DB
C/S.8DB
C/S.4DB
•
•
4
1
RY610
8
7
1
RY612
8
7
1
R-CH, SUPER WOOFER is omitted.
REAR L-CH and CENTER part was omitted.
MIX
AMP
3
6
6
IC602
F
R
C
F
R
C
H.P.F.
RY607
5
4
1
RY609
8
7
1
RY611
8
7
1
J603
IC607
BUFFER
3
6
6
FRONT
L
REAR
L
CENTER
FRONT
REAR
L
CENTER
J601
L
J601
J602
BYPASS
OUT
PUT
(Same as FRONT L-CH)
Signal path
•
:Digital in
:Digital out
:RF (AC-3)
– 17 – – 18 –
– AC-3 (RF) SECTION –
J901
AC-3
RF
INPUT
IC904
31
BUFFER
Q902
BUFFER
Q904
3
MUTE SW
Q901
L.P.F.
1
IC902
IC902
67
BUFFER
Q903
+
2
FILTER
FL902
1
4
COMPARATOR
IC903
COMPARATOR
7
AMP
IC904
6
9
+
-
IC906
13
7
5
6
RV901
NO ADJUSTMENT
SDP-EP70/EP90ES
DIGITAL SIGNAL PROCESSOR
(AC-3 RF DEMODULATOR)
IC901
IC906
9
8
10
X902
46.08MHz
L.P.F.
IC905
X901
18.432MHz
DIN
DEMODULATION S/P
82
XIN
PDO
COMPARATOR
INVERTER
IC906
DIGITAL
PHASE
41
4
57
PLL
ERROR
CORRECTOR
V1
55
78
DIVIDER
X LOCK
MUTI
DAI
CONTROL
DIVIDER
DIGITAL
CPU
INTERFACE
OUT
DAOUT
65
RESET
8 AC. RST
MUTO
59
DAO
MUTO
C
D/A
SECTION
(Page 17)
G
CONTROL
SECTION
(Page 23)
ADDRESS
GENERATOR
WE
OE
DB0 - DB8
35 41
DATA - BUS DB0 - DB8
• Signal path
:RF (AC-3)
09
DB0 - 4
11 - 13•15 - 19
I/O0 I/O7
A0 - 14
10 - 3•25•24•21•23•2•26•1
A0 A14
S RAM
IC907
ADDRESS - BUS A0 - A14
27 22
WE
51 - 43
OE
DB0 - 8
A0
21 - 24•26•27•30•31•37•38•42•39•33•34
A0 - 14
DB5 - 8
27 22
WE
OE
11 - 13•15 - 19
I/O0 I/O7
A0 A14
S RAM
IC908
A14
A0 - 14
10 - 3•25•24•21•23•2•26•1
– 19 – – 20 –
SDP-EP70/EP90ES
– DECODER SECTION –
DATA
BCK
J
DA
SECTION
(Page 17)
LRCK
FS128
SERIAL COMMUNICATION
FORMAT CONVERTER
IC1006
SDIO
DIN
12
BCKI
13
LRCK
14
DCK
15
MCK
16
LAC3
1
STD
36
CLOCK
GENERATOR
SCKR
GPIO0
WSR
SCO
SC1
SC2
SRD
SCK
TXD
RXD
9
8
4
3
D0-D7 A0-A14
41
30
37
26
38
42
43
11 13 15 19
I/00 I/07 A0 A14
S-RAM
IC1003
10 3 25 24 21 23 2 26 1
OE WE
22 27
SDIO
SCKR
GPIO0
WSR
K
CONTROL
SECTION
(Page 23)
I
CONTROL
SECTION
(Page 23)
FOR
FLASH
WRITER
RESET
TX
RX
RESET
MD1
FVPP
TX
RX
• SIGNAL PATH
: DIGITAL IN
55
1
10
11
4
7
78
77
P20/A8
RESET
P51/RXD0
P50/TXD0
MD1
STBY/FVPP
P84/TXD1
P85/RXD1
SYSYTEM CONTROL
IC1002
XTAL EXTAL
23
X1001
16MHz
P60
|
P67
P43
|
P45
P47
P42
P41
P96/16MHz
P40
P46
SC0
SC1
SC2
SRD
SSK
TXD
PXD
38
SC1/PC4
SC2/PC5
31
SRD/PC7
A1-A14
26 25
SSK/PC6
TXD/PC1
PXD/PC0
D23
RD
WR
D0
84
85
87
88
90
91
93
96
100
101
103
104
106
109
111
112
114
115
117
118
47
46
29 35 32
33
STD/PC8
PROCESSOR
SC0/PC3
DIGITAL
SIGNAL
IC1001
H0/PB0
24
23
21
21
28
42
44
46
41
40
14
39
45
H0 - H7
HA0 - HA2
D1001
19
17
15
14
7
6
4
125
10
12
1
13
130
H7/PB7
HA0/PB8
HA2/PB10
RESET
HEN/PB12
HR/W/PB11
EXTAL
HREQ/PB13
PLOCK
X/Y A0 A13
60 61 63 65 68 71 74 76 78 80
55
A0
D8-D15 A0-A14
S-RAM
IC1004
11 13 15 19
I/00 I/07 A0 A14
D16-D23 A0-A14
11 13 15 19
I/00 I/07 A0 A14
10 3 25 24 21 23 2 26 1
OE WE
22 27
S-RAM
IC1005
10 3 25 24 21 23 2 26 1
OE WE
22 27
– 21 –
– 22 –
– CONTROL SECTION –
SDP-EP70/EP90ES
(Page 17)
DECODER
SECTION
(Page 22)
(Page 17)
D/A
SECTION
(Page 17)
D/A
SECTION
(Page 20)
DOLBY
AC-3
SECTION
POWER
SECTION
(Page 25)
DECODER
SECTION
(Page 21)
A
D/A
SECTION
K
E
D
G
H
I
09
DATA
BCKO
LRCKO
SCKR
WSR
SDI0
GPIO0
DIRDAT
DIWDAT
DIRLAT
DIRCLK
DIRERR
DIRRST
DSELA1
DSELA0
AC. RST
MUTO
RESET
STOP
RESET
DIGITAL SIGNAL PROCESSOR
IC424
SDI1
56
SCKR
51
WSR
55
SDI0
57
MEMORY
PLL
EXTAL
27 26
68
DIRDAT
69
DIWDAT
70
DIRLAT
71
DIRCLK
72
DIRERR
74
DSELA1
75
DSELA0
77
REF-RES
76
RF-ERR
1
RESET
80 STOP
TX
RX
78
TXD1
79
RXD1
SCK
41 40 39
•
XTAL
EXTAL
2•3
X201
16MHz
AUDIO
I/F
DIGITAL SIGNAL
PROCESSOR
HOST
I/F
MOSISSHREQ
MISO
35 41 42 43 36
262728
MISO
M9SCLK
M9MOSI
M9MOSS
M9MORQ
SIRCSI
17
1
OUT
SIRCS
RECEIVER
IC256
SDO0
SDO1
SCKT
WST
RESET
M9MRES
GPIO0
18
47
•
46
49
50
76
DISPD1
DISPD0
DISPA0
19
22 - 20
5
11 - 9
A0 - A2
Y
SELECT SWITCH
IC254,255
D0 D7
4 - 1•15 - 12
KEY ARRY
ROTARY
ENCODER
DISPA2
EEP ROM
IC202
11
FL-DAT
DIN
26 - 17•16 - 7
FL-CLK
29 5 430
CLK
OUT0
57
•
56
51
55
49
50
SDA
SCL
56
16
15
ROMCLK
ROMDAT
FL-CLR
FL-LAT
10139
CL
LS
DOUT
OUT20
FLUORESCENT INDICATOR TUBE
DIGITAL SIGNAL PROCESSOR
SDI0
SDI1
SCKR
WSR
SCKT
WST
MEMORY
PLL
EXTAL
27 26
SYSTEM CONTROL
IC201
FL DRIVER
IC251, 252
3
FL251
IC423
AUDIO
I/F
DIGITAL SIGNAL
PROCESSOR
HOST
I/F
SCK
MOSI
MISO
35 41 42 43 36
44 43 42 45 31
48 46
M4SCLK
M4MISO
M4MOSI
34 37 35
29
DI
HREQ
SS
M4MOSS
M4MORQ
24 26
CL
CK
(NC)
OUT1
1 - 20•41 - 56
SDO0
SDO2
SDO1
RESET
GPIO0
76
M4MRES
STB
(NC)
OUT36
AN1
47
45
46
F
MEMORY
I/F
MWR
MRD
MCAS
77 78 80
24 29
MD0
71•69 - 67•65 - 62
31
13 - 15•17 - 21
D0
CE
A16
R/W
VOLLED
AN0
30
25
FROM
POWER TRANSFORMER
D7
VOLUME+
23 24
MD7
DA0 MA15
25 - 22•20 - 18•16•14 - 11•7•5 - 3
12 - 5•26•27•23•25•4•28•3•2
A0
S RAM
IC422
LR+8DB
SS+8DB
CS+8DB
LR+4DB
SS+4DB
CS+4DB
VOLUME-
VOLUME MOTOR DRIVE
IC253
3
DRIVER
2
LED DRIVE
Q251
MUT
RY-OFF
SOA
SOB
SOC
B
D/A
SECTION
(Page 17)
EXTAL
ANADIG
A15
SRCINI
DF-DAT
DF-CLK
DF-LAT
DF-INI
DA-LAT
DA-CLK
DA-DAT
50
51
52
53
54
55
57
58
59
ANADIG
SRCINI
DF-DAT
DF-CLK
DF-LAT
DF-INI
DA-LAT
DA-CLK
DA-DAT
F
62
64
66
63
65
67
61
60
8
7
CONTROL
SWITCH
Q601 - 616
RV251
M
MASTER VOLUME
+8DB SWITCH
Q617, 618, 621,
622,625,626
+4DB SWITCH
Q619, 620, 623,
624,627,628
• Signal path
:Digital in
F. 8DB
R. 8DB
C/S. 8DB
F. 4DB
R. 4DB
C/S. 4DB
MUT
RY-OFF
D/A
SECTION
(Page 17)
– 23 – – 24 –
SDP-EP70/EP90ES
– POWER SECTION –
FL. +30V
FLD. +5V
+5V REG
Q251,254
TO FLUORESCENT
INDICATOR TUBE
+30V REG
Q106
POWER TRANSFORMER
F
RECT
D115, 116
T1
(Page 23)
H
CONTROL
SECTION
+5V
REF
+7V
-7V
-15V
STOP
RST
+5V REG
IC426
RESET
IC203
+15V
-7V REG
IC152
+5V
+B
13
+7V REG
IC151
13
-5V
POWER - ON
DET
Q105
+5V REG
Q103,104
+
+13V
2313
D104
D107
3
REG
CONTROL
IC102
3 2
-5V REG
IC103
D110
+15V REG
Q101
REG CONTROL
IC101,Q107
REG CONTROL
IC101,Q108
-15V REG
IC102
1
RECT
D113, 114
RECT
D112
RECT
D101
S1
POWER
AC
IN
09
– 26 –
-13V
D111
– 25 –
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
• The resistance indicated MF shows tolerance 2%.
¢
•
• 1 : fusible resistor.
• 5 : fusible resistor.
• C : panel designation.
Note: The components identified by mark ! or dotted
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
• Voltages are taken with a VOM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
: internal component.
line with mark ! are critical for safety.
Replace only with part number specified.
under no-signal (detuned) conditions.
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
a : RF (AC-3)
L : digital in
c : digital out
: Can not be measured.
∗
4
W or less unless otherwise
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• p : parts mounted on the conductor side.
®
•
•
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
: Through hole.
¢
: internal component.
WAVEFORMS
– MAIN BOARD (1/4) –
1
5.6Vp-p
7.17MHz
IC423 %¡ (SCKR)
2
5.2Vp-p
4.18MHz
IC423 $ª (SCKT)
3
5.2Vp-p
3MHz
IC423 @¶ (EXTAL)
4
5.2Vp-p
129kHz
IC201 9 (FL-CLK)
5
4.6Vp-p
16MHz
IC201 2 (XTAL)
6
5.6Vp-p
65kHz
IC301 @™ (LRCK)
7
5.6Vp-p
4.16MHz
IC301 @¡ (BCK)
– 27 –
8
5.6Vp-p
8.32MHz
IC301 @º (FS128)
– MAIN BOARD (2/4) –
48kHz
6.4Vp-p
– DECODER BOARD –
9
46.08MHz
IC901 4 (XIN)
!º
18.4MHz
IC901 %∞ (V1)
!¡
5.6Vp-p
18.432MHz
IC906 2
– MAIN BOARD (4/4) –
!™
2Vp-p
5.8Vp-p
1
IC1006 8 (SCKR)
2
IC1006 !£ (BCKI)
3
66kHz
IC1006 !¢ (LRCK)
4
8.42MHz
IC1006 !∞ (DCK)
5
4.34MHz
4.27MHz
5.6Vp-p
5.3Vp-p
5.5Vp-p
2.2Vp-p
6
5Vp-p
140kHz
IC1006 #º (SC1)
7
5.3Vp-p
528kHz
IC1006 #¶ (SC2)
8
5.4Vp-p
4.17MHz
IC1006 $¡ (SC0)
9
4.6Vp-p
16MHz
IC1002 2 (XTAL)
IC401 #™ (LRCKO)
!£
IC401 #¡ (BCKO)
!¢
IC401 7 (FI128)
!∞
IC405 $∞ (512F20)
3MHz
8.64MHz
24.6MHz
6.2Vp-p
6Vp-p
4.1Vp-p
4.4Vp-p
8.42MHz
IC1006 !§ (MCK)
– 28 –
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