Sony SDP EP9ES Service Manual

SDP-EP9ES
SERVICE MANUAL
Photo : GOLD
US Model
AEP Model
E Model
Chinese Model
SPECIFICATIONS
DIGITAL SURROUND PROCESSOR
MICROFILM
— 1 —
MODEL IDENTIFICATION — BACK PANEL —
TABLE OF CONTENTS
1. SERVICING NOTE
........................................................... 3
Parts No.
MODEL PARTS No.
US model CND model AEP model E, MY, SP, CH model
4-987-861-1 4-987-861-2 4-987-861-3 4-987-861-4
• Abbreviation CND : Canadian model. MY : Malaysia model. SP : Singapore model. CH : Chinese model.
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.
2. GENERAL ............................................................................ 4
3. TEST MODE ...................................................................... 12
4. ELECTRICAL ADJUSTMENTS ................................ 15
5. DIAGRAMS
5-1. Circuit Boards Location .................................................... 16
5-2. Block Diagrams
• D/A Section .................................................................... 17
• AC-3 (RF) Section ......................................................... 19
• Control Section............................................................... 21
• Power Section................................................................. 23
5-3. Printed Wiring Board — Main Section — ........................ 25
5-4. Schematic Diagram — Control Section — ....................... 29
5-5. Schematic Diagram — Dolby AC-3 Section — ................ 32
5-6. Schematic Diagram — D/A Section —............................. 35
5-7. Printed Wiring Board — Display Section — .................... 39
5-8. Schematic Diagram — Display Section — ....................... 43
5-9. Printed Wiring Board — Power Section — ...................... 46
5-10. Schematic Diagram — Power Section — ......................... 49
5-11. IC Pin Functions
• IC201 System Controller (HD6433397A13F) ............... 51
• IC301 Digital Audio Interface Receiver (LC8905V)..... 53
• IC401, 402, 403 Sampling Rate Converter
(CXD8517Q) .................................................................. 54
• IC423 Digital Signal Processor (SSP424923) ................ 55
• IC424 Digital Signal Processor (DSP56009) ................. 57
• IC901 Digital Signal Processor (AC-3 RF Demodulator)
(PD4606A) ..................................................................... 59
5-12. IC Block Diagrams............................................................ 62
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.
6. EXPLODED VIEWS
6-1. Front Panel Section............................................................ 67
6-2. Chassis Section.................................................................. 68
7. ELECTRICAL PARTS LIST ......................................... 69
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!! LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
— 2 —
SECTION 1

SERVICING NOTE

SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and from all exposed metal parts to any exposed metal part having a re­turn to chassis, must not exceed 0.5 mA (500 microampers). Leak­age current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instruments.
2. A battery-operated AC milliammeter . The Data Precision 245 digi­tal multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passi ve VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set
RV901 of Main Board
R V901 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.
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:
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
Unit
0.15
1.5k
µ
F
Earth Ground
AC voltmeter (0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
AC-3 RF output terminal
AC-3 RF input 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.
— 3 —
SECTION 2

GENERAL

This section is extracted from instruction manual.
— 4 —
— 5 —
— 6 —
— 7 —
— 8 —
— 9 —
— 10 —
— 11 —
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 but­ton.
2. When the VOLUME LED starts 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 14.)
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 following 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 “DOLBY SURROUND”, 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:
“software version X. XX” will be displayed, and the operation check mode will be set. (X. XX 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
EEPROM read error!
EEPROM write error!
S-RAM access error!
DSP error detected!
Soldering fault or malfunction between IC202 (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 Abnormal DSP Operations”.)
*NOTE:
Refer to “6. Check of Pressing of Unintended Button” on page 14.
— 12 —
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
1
↑4↑3↑2↑
↑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
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
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 b utton 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
DIGIT AL2
DIGIT AL3
DIGIT AL4
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 Tube 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:
4 No reply from DSP
Faulty DSP part, or faulty microprocessor part, etc.
NOTE: This history is memorized in the EEPROM until the unit is
initialized. (Refer to “5. Initialization” on page 14.)
— 13 —
Fluorescent Display Tube Display
Exchange (L-SL, R=SR)
Exchange (L-C, R=SW)
Exchange (NORMAL)
Exchange (L, R-ALL)
Output Destination of Input Signal
Outputs the FRONT Lch/Rch signal only to the REAR Lch/Rch.
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 FRONT 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.
• AEP, E, MY, SP, CH models
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/CE)” will be displayed on the fluorescent display tube, and all internal settings will be returned to the initial values.
• US, CND models
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 VOLUME 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 POWER 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. Self-Diagnosis Mode for Servicing/Display of History of DSP Errors” on page 12 to identify the problems.
• Abbreviation
CND : Canadian model MY : Malaysia model SP : Singapore model CH : Chinese model
— 14 —
SECTION 4

ELECTRICAL ADJUSTMENTS

PLL Free-running Adjustment
Connection :
Main board
TP (LRCK)
Adjusting Method :
1. Connect the frequency counter to TP (LRCK).
2. Turn On the power switch.
3. Adjust RV301 of the main board so that the frequency of TP (LRCK) becomes the specified value.
Specified value: 44.5 kHz ± 0.5 kHz Adjusting point: Main Board
RV901 of Main Board
R V901 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.
Frequency counter
Adjustment Location :
[ MAIN BOARD ] — SIDE A —
RV301 Free-running
TP (LRCK)
RV901 No Adjustment
— 15 —
5-1. CIRCUIT BOARDS LOCATION
SECTION 5

DIAGRAMS

AC1 board
SW board
AC2 board
TR board
MAIN board
PS board
VOL board
DISPLAY board
— 16 —
5-2. BLOCK DIAGRAMS —DA SECTION—
DIGITAL 1
DIGITAL
INPUT IC306
3OUT
DIGITAL 2
DIGITAL
INPUT IC305
INPUT
DOLBY
AC-3
SECTION
C
(Page 20)
D
CONTROL
SECTION
(Page 21)
E
CONTROL
SECTION
(Page 21)
F
CONTROL
SECTION
(Page 22)
09
DIGITAL 3
DIGITAL
INPUT IC304
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
3OUT
3OUT
DAO
J301
INPUT 4
ATT SHIFT LATCH
INIT
ST CK
DT
5
4
3
6
SELECTOR
IC302
D1
D2
D3
D0
3
BUFFER
A0 14
IC307
SDP-EP9ES
(Page 21)
9
(Page 22)
SUPER WOOFER
SELECTOR IC404 (2/2)
Y0 Y1 Y2
SA0A1
5
1
2
CONTROL
SECTION
A
DATA
BCKO
LRCKO
CONTROL SECTION
B
SOA SOB SOC
CENTER
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
SAMPLING RATE
CONVERTER
IC403
SAMPLING
RATE
CONVERTER
SAMPLING
RATE
COUNTER
FLAME
COUNTER
INIT
10
DATAO LRCKO
BCKO
XI
BUFFER IC408
10 11
65
DATAO
30
LRCKO
32
BCKO
31
XI
13
DIGITAL FILTER, D/A CONVERTER
IC405
CLOCK
10
FILTER
F404
FILTER
F401
FILTER
F402
CLOCK
XIN
8
9
2
1
IC407
CONVERTER
MODE
X401
49.152MHz
CONVERTER
MODE
D/A
ATT
34 35 36 37
D/A
ATT
34 35 36 37
DIGITAL
FILTER
GENERATOR
13
12
DIGITAL FILTER, D/A CONVERTER
DIGITAL
FILTER
GENERATOR
SHIFT
SHIFT
LATCH
LATCH
R1(+) R1(-) R2(+) R2(-)
R1(+) R1(-) R2(+) R2(-)
XIN
INIT
INIT
21 23 18 16
CONVERTER
21 23 18 16
10
13 12
9 8
DATAI
40
LRCKI
39
BCKI
38
512FSO
45
IC425
DATAI
40
LRCKI
39
BCKI
38
512FSO
45
30 32
31
13
1 2
3
4
D/A
IC421
25 24 27 28
REAR
L-CH
IN1+ IN1­IN2+
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
IO1+
IO1­IO2+ IO2-
4
+
5 2
+
1
MUT
RY-OFF
REAR L-CH
MUT
RY-OFF
CENTER
MUT
RY-OFF
IC416 L.P.F.
L.P.F.
5
F.8DB
R.8DB
C/S.8DB
4
F.4DB
1
8
7
R.4DB
1
8
7
C/S.4DB
1
R-CH, SUPER WOOFER is omitted.
REAR L-CH and CENTER part was omitted.
RY608
RY610
RY612
IC602
MIX AMP
3
678
678
H.P.F.
F
R
C
F
R
C
IC607
BUFFER
RY607
3
6
6
FRONT
REAR
CENTER
J601
FRONT
L
J601
OUT
REAR
PUT
L
J602
CENTER
L
BYPASS
L
5
4
1
RY609
1
RY611
1
J603
(Same as FRONT L-CH) Signal path
:Digital in :Digital out :RF (AC-3)
DIGITAL AUDIO
INTERFACE RECEIVER
IC301
DIN2
7
Y
A1
2
2
DATAO
XLAT SWDT SRDT EROR
XMODE
E/D OUT
AVOCK
LRCK
BCK
FS128
23
3
6
VIN
11 22 21 20
2
1
DIN1
SCLK
14 15 16 17 24
10
10
1
RV301
SELECTOR
IC404
(1/2)
B2 Y2
VIN
DIGITAL OUTPUT
IC303
REC OUT OUTPUT
PLL
3 6
13
B0 B1 B3
— 18 —— 17 —
SDP-EP9ES
—AC-3 (RF) SECTION—
J901
AC-3
RF
INPUT
IC904
31
BUFFER
Q902
BUFFER
Q904
MUTE SW
Q901
L.P.F.
3
IC902
67
IC902
DIGITAL SIGNAL PROCESSOR
(AC-3 RF DEMODULATOR)
ERROR
CORRECTOR
DB0 - DB8
51 - 43
IC901
DAI
CONTROL
DIVIDER
ADDRESS
GENERATOR
A0
21 - 24•26•27•30•31•37•38•42•39•33•34
DIGITAL
OUT
CPU
INTERFACE
A14
DAOUT
65
RESET
8 AC. RST
MUTO
59
DAO
MUTO
C
D/A
SECTION
(Page 17)
G
CONTROL
SECTION
(Page 21)
FILTER
2
FL902
1 4
COMPARATOR
COMPARATOR
7
IC903
AMP
IC904
6 9
+
-
IC906
13
7
5 6
RV901
NO ADJUSTMENT
BUFFER
1
Q903
+
IC906
9
8
10
X902
46.08MHz
L.P.F. IC905
X901
18.432MHz
DIN
DEMODULATION S/P
82
XIN
4
PDO
57
COMPARATOR
INVERTER
IC906
DIGITAL
PLL
PHASE
41
V1
55
DIVIDER
X LOCK
MUTI
78
WE
OE
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
DB0 - 8
OE
WE
27 22
OE
WE
DB5 - 8
11 - 13•15 - 19
I/O0 I/O7
A0 - 14
A0 - 14
10 - 3•25•24•21•23•2•26•1
A0 A14
S RAM
IC908
— 20 —— 19 —
—CONTROL SECTION—
SDP-EP9ES
(Page 17)
(Page 17)
D/A
SECTION
(Page 17)
D/A
SECTION
(Page 20)
DOLBY
AC-3
SECTION
POWER
SECTION
(Page 23)
A
D/A
SECTION
E
D
G H
09
DATA
BCKO
LRCKO
DIRDAT DIWDAT
DIRLAT DIRCLK DIRERR
DIRRST DSELA1 DSELA0
AC. RST
MUTO
RESET
STOP
57
SDI0
SDI1
56
SCKR
51
WSR
55
MEMORY
DIRDAT
68
DIWDAT
69
DIRLAT
70
DIRCLK
71
DIRERR
72
DSELA1
74
DSELA0
75
REF-RES
77
RF-ERR
76
1
RESET STOP
80
DIGITAL SIGNAL PROCESSOR
IC424
PLL
EXTAL
27 26
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
SIRCSI
17
1
OUT
SIRCS
RECEIVER
IC256
RESET
M9MORQ
SDO0 SDO1
SCKT
WST
M9MRES
DISPD0
19
18
5 Y
SELECT SWITCH
47
46 49 50
DISPD1
IC254,255
D0 D7
4 - 1•15 - 12
KEY ARRY
ROTARY
ENCODER
DISPA0
22 - 20
11 - 9
A0 - A2
DISPA2
EEP ROM
IC202
FL-CLK
FL-DAT
11
29 5 430
DIN
CLK
OUT0
26 - 17•16 - 7
57
SDI0
SDI1
56
SCKR
51
WSR
55
SCKT
49
WST
50
MEMORY
PLL
27 26
SDA
SCL
56
16
15
ROMCLK
ROMDAT
SYSTEM CONTROL
FL-CLR
FL-LAT
10139
CL
LS
3
DOUT
OUT20
FLUORESCENT INDICATOR TUBE
DIGITAL SIGNAL PROCESSOR
IC423
AUDIO
IC201
FL DRIVER IC251, 252
FL251
29
SCK
48 46
M4SCLK
DI
EXTAL
I/F
DIGITAL SIGNAL
PROCESSOR
HOST
I/F
MOSI
HREQ
MISO
SS
35 41 42 43 36
44 43 42 45 31
M4MISO
M4MOSI
M4MOSS
M4MORQ
24 26
34 37 35
CL
CK
(NC)
OUT1
1 - 20•41 - 56
SDO0 SDO2 SDO1
RESET
M4MRES
STB
OUT36
GPIO0
76
(NC)
AN1
47 45 46
F
MEMORY
I/F
MWR
MRD
MCAS
MD0
77 78 80
71•69 - 67•65 - 62
31
24 29
13 - 15•17 - 21
D0
CE
A16
R/W
VOLLED
30
25
FROM POWER TRANSFORMER
AN0
D7
VOLUME+
23 24
MD7
VOLUME-
S RAM
IC422
VOLUME MOTOR DRIVE
3 2
DA0 MA15
25 - 22•20 - 18•16•14 - 11•7•5 - 3
12 - 5•26•27•23•25•4•28•3•2
A0
IC253
DRIVER
LED DRIVE
Q251
LR+8DB SS+8DB CS+8DB
LR+4DB SS+4DB CS+4DB
MUT
RY-OFF
A15
62 64 66
63 65 67
61 60
8 7
CONTROL
SWITCH
Q601 - 616
RV251
M
MASTER VOL
ANADIG
SRCINI
DF-DAT
DF-CLK DF-LAT
DF-INI
DA-LAT DA-CLK DA-DAT
+8DB SWITCH
Q617, 618, 621,
622,625,626
+4DB SWITCH
Q619, 620, 623,
624,627,628
• Signal path :Digital in
SOA SOB
B
SOC
D/A
SECTION
(Page 17)
EXTAL
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. 8DB R. 8DB C/S. 8DB
F. 4DB R. 4DB C/S. 4DB
MUT RY-OFF
F
D/A
SECTION
(Page 17)
— 21 —
— 22 —
— POWER SECTION —
FL. +30V
FLD. +5V
+5V REG
Q251,254
TO FLUORESCENT
INDICATOR TUBE
+30V REG
Q106
F
RECT
D115, 116
T1
POWER TRANSFROMER
SDP-EP9ES
(Page 21)
H
CONTROL
SECTION
+5V REF
+7V
-7V
-15V
STOP
RST
+5V REG
IC426
RESET
IC203
-7V REG IC152
+5V
+15V
13
+B
+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
E,Malaysia,Singapore, Chinese
S4
VOLTAGE
SELECTOR
S1
POWER
AC IN
09
-13V D111
— 23 —
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