Technics SU-A808 User manual

AD9907181C2
Stereo Integrated Amplifier
SU-A808
Colour
(K)...............Black Type
Areas
(E)...............Europe and Russia.
(EB)............Great Britain.
(EG)............Germany, France and Italy.
SPECIFICATIONS
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1999 Matsushita ElectricIndustrial Co., Ltd. All rights reserved.
Unauthorized copying and distribution isaviolation of law.
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NOTATION PUBLIC "-//ALDUS//NOTATION TAGGED IMAGE FILE FORMAT//EN"
ENTITY SYSTEM "C:\WINDOWS\ 礁寞踢\AD_SGML\F9907-3\sea909se\technics.tif"
1. Before Repair
1. Turn off the power supply. Using a10 , 10 Wresistor, connect
both ends of power supplycapacitors (C701, C702) inorder to
discharge the voltage.
2. Before turning the power supplyon, after completion of repair,
slowlyapplythe primaryvoltage byusing apower supplyvoltage
controller to make sure that the consumed current at 50 HzinNO
SIGNALmode shouldbe shownbelow with respect to supply
voltage 230/240 V.
Powersupply
voltage AC 230 V, 50 Hz AC 240 V, 50 Hz
Consumed
current 70-270 mA 60-260 mA
2. Protection Circuitry
The protection circuitrymayhave operatedif eitherof the following conditions is noticed:
-Nosound isheard when the power isswitched ON.
-Sound stops during aperformance.
The functions of this circuitryis toprevent circuitrydamage if, forexample, the positive and
negative speakerconnection wires are shorted, orif speakersystems withanimpedance less
thanthe indicatedratedimpedance of this unit are used.
If this occurs, followthe procedure outlinedbellow:
1. Switch OFF the power.
2. Determine the cause of the problem and correct it.
3. Switch ONthe power once again.
Note:
When the protection circuitryfunctions, the unitwill not operate
unless the power isfirst switched OFF and ONagain.
3. Accessories
-AC mains lead
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(E) and (EG)areas :(RJA0019-X)......... 1pc.
(EB)area :(RJA0053-2X).........................1pc.
-Remote control transmitter
(RAK-SUA11WH)........................................1pc.
-Batteries
(R6/LR6, AA, UM-3)..................................2pcs.
Note: These are availableon sales route.
4. Caution for AC Mains Lead
NOTATION PUBLIC "-//ALDUS//NOTATION TAGGED IMAGE FILE FORMAT//EN"
ENTITY SYSTEM "ac_caution.tif"
5. Operations
6. Operation Checks and Component Replacement /
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Procedures
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7. About the +/- 15 V Line Abnormality Detect
Function
1. Thismodel features the function that shuts downthe mainpower
source when itcheck the ± 15 Vline with the IC801
(microcomputer) and find the different voltage. (After power is
turned on, the unitenters the stand-bymode.)
2. When the unitenters stand-bymode with abnormalitydetected,
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check the circuits arround the ± 15 Vline. (Speciallycheck the
abnormalityof the stabilizing power source circuit.)
3. To clear thisstand-bymode, short-circuitthe TP801 land on the
circuitboard. However, clearance of the stand-bymode and turn
on the electricitywhen the repairisnot completed maylead to
another trouble. Therefore, be especiallycareful to do so. (Donot
turn on the electricityfor along time.)
4. When the repairiscompleted, leave the TP801 open.
7.1. About the abnormalitydetect function with the operation LED
turned off
1. Ifthe operation LEDisturned off, there are possibilities of the
following abnormalities inaddition to the LEDitselfmalfunctioning
:
-Power amplifier´s malfunction bythe speaker terminal short-
circuit.
-Malfunction of cooling fan.
The unitfeatures the function that detects above abnormalities.
8. Schematic Diagram
8.1. SchematicDiagram Notes
-Thisschematicdiagram maybe modified at anytime with the
development of new technology.
Notes:
S204:
Uniton/off switch ( /I)
S801:
Input select switch (TAPE 1)
S802:
Input select switch (TAPE 2/MD)
S803:
Input select switch (AUX)
S804:
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Input select switch (DVD)
S805:
Input select switch (CD)
S806:
Input select switch (TUNER)
S807:
Input select switch (PHONO)
S808:
VGCA switch ( )
S809:
Tape monitor (SOURCE) switch (TAPE MONITOR)
S810:
Tape monitor (TAPE 2/MD)switch (TAPE MONITOR)
S811:
Tape monitor (TAPE 1) switch (TAPE MONITOR)
S812:
Speaker select switch (SPEAKERB)
S813:
Speaker select switch (SPEAKERA)
VR201:
Volume control VR(VOLUME)
VR202:
Balance control VR(BALANCE)
VR203:
Output voltage adjustment VR(L ch)
VR204:
Output voltage adjustment VR(Rch)
VR301:
Tone control VR(BASS)
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VR302:
Tone control VR(TREBLE)
-Indicated voltage values are the standard values for the unit
measured bythe DC electroniccircuittester (high-impedance)
with the chassistaken as standard. Therefore, there mayexist
some errors inthe voltage values, depending on the internal
impedance of the DC circuittester.
Nomark :Power ON
-Important safetynotice:
Components identified bymark have special characteristics
important for safety.
Furthermore, special parts which have purposes of fire-retardant
(resistors), high-qualitysound (capacitors), low-noise (resistors),
etc. are used.
When replacing anyof components, be sure to use only
manufacturers specified parts showninthe parts list.
-Caution!
ICand LSI are sensitive to staticelectricity.
Secondarytroublecan be prevented bytaking care during repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
Put aconductive mat on the work table.
Donot touch the legs of ICor LSI with the fingers directly.
-Voltage and signal line
:Positive voltage line
:Negative voltage line
:Phono signal line
:Tape rec signal line
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9. Schematic Diagram
10. Printed Circuit Board Diagram
11. Block Diagram
12. Wiring Connection Diagram
13. Type Illustration of ICs, Transistors and Diodes
14. Measurements and Adjustments
14.1. Measuring Instruments and Special Tools
-AC electronicvoltmeter (AC EVM)
-AFoscillator
14.2. Output Voltage Adjustment
1. Turn on the power.
2. Select the input source to TUNER.
3. Connect the measuring instrument as shown Fig.1
4. Apply1kHz, 100 mV to TUNERterminal.
5. Adjust the VOLUME to maximum.
6. Adjust VR203 (L ch) and VR204 (Rch) so that the output voltage
to AC 14.0± 0.2V. Shownin Fig.2
Fig.1
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-Adjustment point Fig.2
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15. Terminal Function of ICs
15.1. IC801 (M38503M2405F) :System Control
Pin
No. Name I/O Function
1VCC I Powersupplyterminal
2 VREF I Reference voltage input
3AGND - GND terminal
4 MUTE
LED OLED drive signal output (Mute)
5 STBY
LED OLED drive signal output (Stand by)
6REMCON I Remote control signal input
7BACKUP I Powerfailure detect signal input
8NC - Not used, connectedtoGND
9 SEL
DATA OData signal output forinput select IC (IC201)
10 SEL
CLK OClock signal output forinput select IC (IC201)
11 SELSTB O Strobe signal output forinput
select IC (IC201)
12 POWER
SW I Powerswitch(S204) detect signal input
13 LED O - Not used, open
14 LED C O Input select LED drive signal
output
15 CNVSS - ConnectedtoGND
16 LED B O Input select LED drive signal
output
17 LED A O Input select LED drive signal
output
18 RESET I Systemreset signal input
19 X IN I Connectedtothe ceramic
oscillator(8 MHz)
20 X OUT O Connectedtothe ceramic
oscillator(8 MHz)
21 GND - GND terminal
22 TAPE2
LED OLED drive signal output (Tape 2)
23 TAPE1
LED OLED drive signal output (Tape 1)
24 SOURCE
LED OLED drive signal output (Source)
25 SP B
LED OLED drive signal output (SpeakerB)
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Pin
No. Name I/O Function
26 SP A
LED OLED drive signal output (SpeakerA)
27 VRDOWN O Motordrive signal output
(Volume down)
28 VRUP O Motordrive signal output
(Volume up)
29 S MUTE O Audiomuting control signal
output
30 POWER O Powerrelaycontrol signal
output
31 SP B
RLY OSpeakerB relaycontrol signal output
32 SP A
RLY OSpeakerA relaycontrol signal output
33 VGCA
RLY OVGCA mode relaycontrol signal output
34 TAPE1
RLY O Tape 1 relaycontrol signal output
35 DVD
RLY ODVD relaycontrol signal output
36 CD RLY O CD relaycontrol signal output
37 MON
RLY OMonitorrelaycontrol signal output
38 VGCA
LED OLED drive signal output (VGCA mode)
39 VIA LED O LED drive signal output (VIA
mode)
40 REG
MON I Regulation monitorsignal input
41 KEY
AD2 I Operation keysignal input
42 KEY
AD1 I Operation keysignal input
16. Replacement Parts List
Notes:
-Important safetynotice:
Components identified bymark have special characteristics
important for safety.
Furthermore, special parts which have purposes of fire-retardant
(resistors), high-qualitysound (capacitors), low-noise (resistors),
etc. are used.
16

When replacing anyof components, be sure to use only
manufactures specified parts showninthe parts list.
-The <IA> <IB> <IC> <ID> marks inRemarks indicate language of
instruction manual.
<IA> :English, Spanish, Swedish, Russian, Polish, Czech
<IB> :English
<IC> :German, Italian, French
<ID> :Netherlandish, Danish
-The parenthesized indications inthe Remarks columns specifythe
areas. (Refer to the cover page for area.)
-The marking (RTL) indicates that Retention Time isLimited for this
item. After the discontinuation of thisassemblyinproduction, the
item will continue to be availablefor aspecificperiod of time. The
retention period of availabilityisdependent on the type of
assembly, and inaccordance with the lawsgoverning part and
product retention. After the end of thisperiod, the assemblywill
no longer be available.
-All parts are supplied byMESA.
Ref. No. PartNo. PartName& Description Pcs. Remarks
1RKM0219F-K TOPCABINET 1
2RHD30035-K1 SCREW 4
3RHD30053 SCREW 1
4XTBS3+8JFZ1 SCREW 2
5RDG0438 GEAR 1
6REM0072-3 FAN 1
7RHD30070 SCREW 1
8RHN30002 NUT 4
9RHN30005 NUT 4
10 RKA0053-A FOOT 4
10-1 RMG0270-K RUBBER 4
11 RMG0332-K RUBBER 2
12 RMR1110-K TERMINAL COVER 8
13 RGK1111-K NUT 4
14 RHD26033 SCREW 4
15 RKF0596-Q DOOR 1
16 RMR1252-K ARM(L) 1
17 RMR1253-K ARM(R) 1
18 RGB0031-A TECHNICSBADGE 1
19 RGB0112-N VGCABADGE 1
20 RGH0155A-K SHEET 1
21 RGK1182-N BUTTON ORNAMENT 1
22 RGK1184-S VOLUMERING 1
23 RGL0453-Q PANEL LIGHT1 2
24 RGL0456-Q PANEL LIGHT2 1
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Ref. No. PartNo. PartName& Description Pcs. Remarks
25 RGL0457-Q PANEL LIGHT3 1
26 RGP0746A-K PANEL 1
27 RGU0890-1K BUTTON,POWER 1
28 RGU1712-K BUTTON,OPEN 1
29 RGU1782-K BUTTON,SELECTOR 1
30 RGU1784-S BUTTON,SPEAKER 1
31 RGW0285-S KNOB,TONE 3
32 RGW0325-K KNOB,VOLUME 1
33 RHD26016 SCREW 2
34 RHD26034 SCREW 1
35 RHN90001 NUT 1
36 RKG0009 MAGNET 1
37 RKW0273A-K FILTER 1
38 RME0284 SPRING 1
39 RMR1254-K MAGNETHOLDER 1
40 RMR1261-K DAMPER HOLDER 1
41 XTBS26+8J SCREW 26
42 XTBS3+8JFZ1 SCREW 26
43 XTB3+16F SCREW 4
44 XTB3+20JFZ SCREW 8
45 XTB3+6G SCREW 4
46 XTB3+6JFZ SCREW 4
47 XTB3+8JFZ SCREW 2
48 XTW3+15T SCREW 5
49 XWE3E10 WASHER 4
A1 RAK-SUA11WH REMOTECONT.TRANSMITTER 1
A1-1 RKK0123-K BATTERYCOVER 1
A2 RJA0019-X AC POWER SUPPLYCORD 1 (E,EG) /
A2 RJA0053-2X AC POWER SUPPLYCORD 1 (EB)/
A3 RQA0117 WARRANTYCARD 1
A4 RQCB0169 SERVICECENTER LIST 1
A5 RQT5113-E OPERATING INSTRUCTIONS 1 (E)<IA>
A6 RQT5116-B OPERATING INSTRUCTIONS 1 (EB)/ <IB>
A7 RQT5114-D OPERATING INSTRUCTIONS 1 (EG)/ <IC>
A8 RQT5115-H OPERATING INSTRUCTIONS 1 (EG)/ <ID>
C103,04 ECBT1H181KB5 50V180P 2
C107,08 ECEA1CKS101 16V100U 2
C109,10 ECBT1H391KB5 50V390P 2
C113,14 ECQB1H223JF3 50V0.022U 2
C115,16 ECQB1H562JF3 50V5600P 2
C117,18 RCE1HKA4R7BG 50V4.7U 2
C119,20 ECQB1H472JF3 50V4700P 2
C121,22 ECBT1E103ZF 25V0.01U 2
C123,24 RCE1HKA3R3BG 50V3.3U 2
C201-16 ECCR1H101K5 50V100P 16
C251,52 ECEA0JKS101 6.3V100U 2
C253,54 ECQV1H104JM3 50V0.1U 2
C301,02 RCE1HKA3R3BG 50V3.3U 2
C303,04 ECCR1H101K5 50V100P 2
C305,06 ECBT1H820KB5 50V82P 2
C307,08 RCE1HKA4R7BG 50V4.7U 2
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Ref. No. PartNo. PartName& Description Pcs. Remarks
C309,10 ECBT1H390J5 50V39P 2
C311,12 RCE1CKA100BG 16V10U 2
C313,14 ECQV1H823JZ 50V0.082U 2
C315,16 ECQB1H153JF3 50V0.015U 2
C317,18 ECQB1H183JF3 50V0.018U 2
C319,20 ECQB1H222JF 50V2200P 2
C321,22 ECBT1E223ZF 25V0.022U 2
C323,24 ECBT1H121KB5 50V120P 2
C351,52 ECA1EPXS100B 25V10U 2
C353,54 ECBT1H101KB5 50V100P 2
C355,56 ECA1APXS470B 10V47U 2
C357,58 ECBT1H820KB5 50V82P 2
C359,60 ECBT1H180J5 50V18P 2
C361-64 ECA1EPXS100B 25V10U 4
C367,68 ECA1CPXS330B 16V33U 2
C369,70 ECA1EPXS100B 25V10U 2
C401,02 ECA1CPXS470B 16V47U 2
C403,04 ECKR1H121KB5 50V120P 2
C405,06 ECA1APXS101B 10V100U 2
C407,08 ECBT1H820KB5 50V82P 2
C409,10 ECCR2H330J5 500V33P 2
C413,14 ECCV2H070D 500V7P 2
C415,16 ECBT1H102KB5 50V1000P 2
C426 ECBT1H102KB5 50V1000P 1
C427 ECBT1E223ZF 25V0.022U 1
C428 ECKR1H103ZF5 50V0.01U 1
C451,52 ECKR1H333ZF5 50V0.033U 2
C453-56 ECCV2H680K 500V68P 4
C457-60 RCE1HKA3R3BG 50V3.3U 4
C461,62 ECBA1H681KB5 50V680P 2
C501-04 ECA1APXS101B 10V100U 4
C505,06 ECQV1H473JM3 50V0.047U 2
C507 ECEA1CKS101 16V100U 1
C508 ECA1HM470 50V47U 1
C509 ECEA1HN100SB 50V10U 1
C511,12 ECBT1H680J5 50V68P 2
C513-18 ECQV1H473JM3 50V0.047U 6
C519-22 ECQB1H223JF3 50V0.022U 4
C523,24 ECBT1H102KB5 50V1000P 2
C525,26 ECQB1H152JF3 50V1500P 2
C531,32 ECBT1C332KR5 16V3300P 2
C601,02 RCE1CKA100BG 16V10U 2
C603 ECEA0JKS101 6.3V100U 1
C604 ECEA1HSN010 50V1U 1
C605 ECEA0JKS331 6.3V330U 1
C701 ECETX1J153XZ 63V15000U 1 (E,EG) /
C701 ECETX1J223XZ 63V22000U 1 (EB)/
C702 ECETX1J153XZ 63V15000U 1 (E,EG)/
C702 ECETX1J223XZ 63V22000U 1 (EB)/
C705 ECBT1H104KB5 50V0.1U 1
C707,08 ECA1JPXH560E 63V56U 2
C709,10 ECKR2H103ZU 500V0.01U 2
C711 ECQE2104KF3 250V0.1U 1
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Ref. No. PartNo. PartName& Description Pcs. Remarks
C712 ECBT1E103ZF 25V0.01U 1
C714 ECA1CM471 16V470U 1
C715 ECBT1E103ZF 25V0.01U 1
C716 RCE1CM102BV 16V1000U 1
C751,52 RCE1EFG470BJ 25V47U 2
C793,94 ECA1HBX3R3B 50V3.3U 2
C801-03 ECBT1E103ZF 25V0.01U 3
C804 ECA0JM102 6.3V1000U 1
C805 RCE1HKAR47BG 50V0.47U 1
C806 ECEA1HKS2R2 50V2.2U 1
C807 ECBT1H102KB5 50V1000P 1
C808 ECBT1E103ZF 25V0.01U 1
C809,10 RCE1AKA470BG 10V47U 2
C811 ECBT1H101KB5 50V100P 1
C812,13 ECKR1H103ZF5 50V0.01U 2
C814,15 ECA1CPXS100B 16V10U 2
C816 RCE1CKA100BG 16V10U 1
C817 RCE1AKA470BG 10V47U 1
C820 ECQV1H224JM3 50V0.22U 1
CN201 RJU003K010M1 CONNECTOR(10P) 1
CN202 RJU003K008M1 CONNECTOR(8P) 1
CN301 ,02 RJU003K008M1 CONNECTOR(8P) 2
CN401 RJU057W004 CONNECTOR(4P) 1
CN601 SJT3213 CONNECTOR(2P) 1
CN702 RJS1A6607T1 CONNECTOR(7P) 1
CN703 RJS1A6603 CONNECTOR(3P) 1
CN704-17 RJS1A1101T1 CONNECTOR(1P) 14
CN801, 02 RJU003K008M1 CONNECTOR(8P) 2
CN803 RJU071H11M CONNECTOR(11P) 1
CN805 RJU071H11M CONNECTOR(11P) 1
CP201 RJT003K010-1 CONNECTOR(10P) 1
CP202 RJT003K008-1 CONNECTOR(8P) 1
CP301, 02 RJT003K008-1 CONNECTOR(8P) 2
CP401 RJT057W004-1 CONNECTOR(4P) 1
CP801 ,02 RJT003K008-1 CONNECTOR(8P) 2
CP803 RJT071K11 CONNECTOR(11P) 1
CP805 RJT071K11 CONNECTOR(11P) 1
D351 MA165 DIODE 1
D401,02 MA167 DIODE 2
D403,04 MA4036M DIODE 2
D405,06 MA165 DIODE 2
D451 MA165 DIODE 1
D452 MA4056M DIODE 1
D453 MA29WA DIODE 1
D501,02 MA165 DIODE 2
D503,04 MA4160M DIODE 2
D505 MA165 DIODE 1
D506 1SS291TA DIODE 1
D507 MA165 DIODE 1
D605 MA4091M DIODE 1
D606 MA165 DIODE 1
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