Technics SU-V300M2 User manual

AD0104089C2
Stereo Integrated Amplifier
SU-V300M2
Colour
(K)...........Black Type
Areas
(E)...........Europe.
(EB).........Great Britain.
(EG).........Germany.
SPECIFICATIONS
1

1. Note
-The contents changed from Model No. SU-V300M2 (Order No.
AD99003072C2)
Thismodel [SU-V300M2 (Order No. AD0104089C2)] ischanged
from Model No. SU-V300M2 (Order No. AD9903072C2) about
Printed CircuitBoard. So you need to use the service manual
2

properlywith distinguishing the unitissoldon and after April
2001 ornot.
When the unitisrepaired, refer to the tableas shownbelow and
confirm IC601 and Part No. of operation P.C.B.
SU-V300M2 /
(AD903072C2) SU-V300M2 / (AD0104089C2)
IC601 RSN3502A RSN3502C
Operation
P.C.B. RJB1273BB-2 RJB1273BB-3
The time of
sales Before April 2001 Onand after April 2001
2. Before Repairs
1. Turn off the power supply. Using a10 , 10 Wresistor, connect
both ends of power supplycapacitors (C703, C704) 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 respectto supply
voltage 230/240 V.
Powersupply
voltage AC 230 V AC 240 V
Consumedcurrent
50 Hz 47 ~ 157 mA 45 ~ 150 mA
3. 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 procedures outlinedbelow.
1. Switch OFF the power.
2. Determine the cause of the problem and correct it.
3. Switch ONthe power once again.
3

Note:
When the protection circuitryfunctions, the unitwill not operate
unless the power isfirst switched OFF and then ONagain.
4. Accessories
-AC power supplycord for (E) and (EG)areas
(RJA0019-1X)................................1pc.
-AC power supplycord for (EB)area
(RJA0035-2X)................................1pc.
5. Caution for AC Mains Lead
4

6. Location of Controls
7. Operation Checks and Component Replacement /
Procedures
-Thissection describes procedures for checking the operation of
the major printed circuitboards and replacing the main
components.
-For reassemblyafter operation checks or replacement, reverse the
respective procedures. Special reassemblyprocedures are
5

described onlywhen required.
7.1. Checking for the operation P.C.B. and tone amp P.C.B.
-Check the operation P.C.B. and tone amp P.C.B. as shownabove.
6

7.2. Checking for the mainP.C.B.
-Follow the (Step 1) -(Step 5) of item 7.1.
7

-Check the mainP.C.B. as shownbelow.
8

7.3. Replacement for the power IC
-Follow the (Step 1) -(Step 3) of item 7.1.
9

8. Type Illustration of ICs, Transistors and Diodes
9. Schematic Diagram Notes
-Thisschematicdiagram maybe modified at anytime with the
development of new technology.
10

Notes:
S401:
Tone control switch (TONE)
S801:
Input selector switch (PHONO)
S802:
Input selector switch (TUNER)
S803:
Input selector switch (CD)
S804:
Input selector switch (AUX)
S805:
Input selector switch (TAPE2)
S806:
Tape1 monitor switch / (TAPE1 MONITOR)
S807:
Uniton/off switch ( )
S808:
Speaker select switch / (SPEAKERSA)
S809:
Speaker select switch / (SPEAKERSB)
VR471:
Bass control VR(BASS)
VR472:
Treblecontrol VR(TREBLE)
VR501:
Volume control VR(VOLUME)
VR502:
Balance control VR(BALANCE)
-Indicated voltage values are the standard values for the unit
measured bythe DC electroniccircuittester (high-impedance)
with the chassistaken as standard. Therefore, there mayexist
11

some errors inthe voltage values, depending on theinternal
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
manufacturer´s specified parts showninthe parts list.
-The supplypart number isdescribed alone inthe replacement
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
12

:Phono signal line
:Rec out signal line
10. Schematic Diagram
11. Printed Circuit Board Diagram
12. Wiring Connection Diagram
13. Block Diagram
14. Terminal Function of ICs
14.1. IC801 (M37470M2536S): / Micro Computer
13

Pin
No.Terminal
Name I/O Function
1P17/
SRDY O Relaydrive signal output
2P16/CLK - Remote control signal output /
(Not used, open)
3P15/
SOUT OLED (PHONO) drive signal output
4P14/SIN O LED (TUNER) drive signal
output
5P13/T1 O LED (CD) drive signal output
6P12/T0 O LED (AUX) drive signal output
7P11 O LED (TAPE2) drive signal output
8P10 O LED (TAPE1 MONITOR) drive
signal output
9P23/IN3 - Motor(volume control) drive
signal output / (Not used, open)
10 P22/IN2
11 P21/IN1 I Input selectorswitchsignal
input
12 P20/IN0 I SpeakerA, B select switch
signal input
13 VREF I Reference voltage input
14 X IN I Crystal oscillatorconnected
terminal / (F=4 MHz)
15 X OUT O
16 VSS - GND
14

Pin
No.Terminal
Name I/O Function
17 VCC I Powersupplyterminal
18 RESET I Systemreset signal input
19 P30/INT0 I Back up detect signal input
20 P31/INT1 - Not used, connectedtoGND
21 P32/
CNTR0 IPowerswitchsignal input / (Not
used, connectedtoGND)
22 P23/
CNTR1 - Not used, connectedtoGND
23 P40 O Strobe signal output forinput
selector
24 P41 O Clock signal output forinput
selector
25 P00 O Data signal output forinput
selector
26 P01 O SpeakerA select signal output
27 P02 O SpeakerB select signal output
28 P03 O LED (SPEAKER A) drive signal
output
29 P04 O LED (SPEAKER B) drive signal
output
30 P05 - Not used, connectedtoGND
31 P06 - Not used
32 P07 O Audiomuting control signal
output
15. 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.
When replacing anyof components, be sure to use only
manufacture’sspecified parts showninthe parts list.
-The <IA> <IB> <IC> <ID> <IE> marks inRemarks indicate language
of instruction manual.
<IA>:English, Spanish, Swedish
<IB>:Russian, Polish, Czech
<IC>:German, Italian, French
15

<ID>:Netherlands, Danish,
<IE>:English
-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 availabilityisdependenton 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
1RHD30035-K1 SCREW 4
2RKM0036D-K TOPCABINET 1
3 XTBS3+8JFZ1 SCREW 17
4RGW0201-K KNOB,VOLUME 1
5RHD30070 SCREW 1
6RKA0053-A FOOT 4
7RMG0332-K RUBBER 2
8RGP0389G-K1 FRONTPANEL 1
9RGB0031-A TECHNICSBADGE 1
10 RGL0184A-Q1 PANEL LIGHT1 1
11 RGL0185A-Q PANEL LIGHT2 1
12 RGL0229-Q PANEL LIGHT3 1
13 XTW3+15T SCREW 2
14 RGU0887A-K2 BUTTON,SPEAKER 1
15 RGU0889-K BUTTON,TONE 1
16 RGU1038A-K BUTTON,SELECTOR 1
17 RGU1685-K BUTTON,POWER 1
18 RGW0177A-K KNOB,TONE 3
19 RHD26017 SCREW 11
20 RHD26018 SCREW 1
21 RHN90001 NUT 4
22 RMR1181-K COVER 1
24 XTB3+20JFZ SCREW 7
25 XTB3+8JFZ SCREW 8
A1 RJA0019-1X AC POWER SUPPLY/ CORD 1 (E,EG)/
A1 RJA0053-2X AC POWER SUPPLY/ CORD 1 (EB)/
A3 RQCB0169 SERVICECENTER / LIST 1
A4 RQT4663-1E INSTRUCTION MANUAL 1 (E)<IA>
A4 RQT4664-1R INSTRUCTION MANUAL 1 (E)<IB>
A4 RQT4665-1D INSTRUCTION MANUAL 1 (EG)<IC>
A4 RQT4666-1H INSTRUCTION MANUAL 1 (EG)<ID>
A4 RQT4667-1B INSTRUCTION MANUAL 1 (EB)<IE>
16

Ref. No. PartNo. PartName& Description Pcs Remarks
C401 ECEA1VKA4R7B 35V4.7U 1
C402,03 ECBA1E103ZF5 25V0.01U 2 ECBT1E103ZF5
C404 ECEA1VKA4R7B 35V4.7U 1
C405 ECBT1H102KB5 50V1000P 1 F1D1H102A012
C407-22 ECBT1H101KB5 50V100P 16 F1D1H101A012
C425-28 ECEA1CKS100 16V10U 4
C451,52 ECEA1VKA4R7B 35V4.7U 2
C455,56 ECBT1H102KB5 50V1000P 2 F1D1H102A012
C457,58 RCE1AKA330BG 10V33U 2 F2A1A330A011
C459,60 ECQB1H223JF3 50V0.022U 2
C461,62 ECQB1H682JF3 50V6800P 2
C463,64 ECEA1VKA4R7B 35V4.7U 2
C465,66 ECBA1E103ZF5 25V0.01U 2 ECBT1E103ZF5
C467,68 ECBT1H181KB5 50V180P 2
C471,72 RCE1HKA3R3BG 50V3.3U 2 F2A1H3R3A015
C475,76 ECBT1H101KB5 50V100P 2 F1D1H101A012
C477,78 ECBT1H221KB5 50V220P 2 F1D1H221A012
C479,80 ECBT1H560J5 50V56P 2 ECBT1H560J3
C481,82 ECEA1VKA4R7B 35V4.7U 2
C483,84 ECEA1HKS010 50V1U 2
C485,86 ECFR1E123KR 25V0.012U 2 F1C1E123A005
C487,88 ECQV1H683JZ3 50V0.068U 2
C489,90 ECQB1H392JF3 50V3900P 2
C491,92 ECFR1E273KR 25V0.027U 2 F1C1E273A011
C495,96 ECBA1E103ZF5 25V0.01U 2 ECBT1E103ZF5
C518 ECBA1E103ZF5 25V0.01U 1 ECBT1E103ZF5
C561,62 ECBT1H102KB5 50V1000P 2 F1D1H102A012
C601,02 ECEA1EKN3R3B 25V3.3U 2
C603,04 ECBT1H271KB5 50V270P 2 F1D1H271A012
C605,06 ECEA1CKS220 16V22U 2
C607,08 ECCR1H180JC5 50V18P 2
C609,10 ECBT1H102KB5 50V1000P 2 F1D1H102A012
C611-14 ECQV1H104JM3 50V0.1U 4
C615 ECEA1HN100SB 50V10U 1
C616 ECEA1HKA330B 50V33U 1
C621-24 ECQB1H153JF3 50V0.015U 4
C625 ECBT1H271KB5 50V270P 1 F1D1H271A012
C626 ECEA0JKS101 6.3V100U 1
C627 ECBT1E223ZF 25V0.022U 1 F1D1E223A001
C628 RCE1CKA470BG 16V47U 1 F2A1C470A017
C629,30 ECQV1H473JM3 50V0.047U 2
C702 ECQE2104KF3 250V0.1U 1
C703,04 ECEA1HU332UE 3300U 2
C707,08 ECEA1EKA470B 25V47U 2
C711 ECBT1H271KB5 50V270P 1 F1D1H271A012
C753 ECA1HM471 470U 1
C756 ECKR1H103ZF5 50V0.01U 1 F1B1H1030001
C757 RCE1CKA470BG 16V47U 1 F2A1C470A017
C758 RCE1AKA101BG 10V100U 1 F2A1A1010020
C759,60 RCE1CM102BV 1000U 2
C775 ECBT1C392KR5 16V3900P 1 F1D1C392A010
C801 ECBT1C103NS5 16V0.01U 1
17

Ref. No. PartNo. PartName& Description Pcs Remarks
C803 ECBT1C103NS5 16V0.01U 1
C804 ECA0JM102 6.3V1000U 1
C805 RCE1HKAR47BG 50V0.47U 1 F2A1HR47A015
C806 ECEA1HKS2R2 50V2.2U 1
C807 ECEA1EKS4R7 25V4.7U 1
CN601 RJU057W007 CONNECTOR(7P) 1 K1KB07B00017
CN701 RJS1A6606T1 CONNECTOR(6P) 1 K1MP06A00009
CN751-55 RJS1A1101T1 CONNECTOR(1P) 5
CN757 SJS305-1 CONNECTOR(3P) 1 (E,EG)
CN757 SJS702-2 CONNECTOR(7P) 1 (EB)
CN901-05 RJU003K008M1 CONNECTOR(8P) 5 K1KB08A00046
CN906 SJS50782JQH CONNECTOR(7P) 1 K1KB07B00016
CP601 RJT057W007-1 CONNECTOR(7P) 1 K1KA07A00102
CP901-05 RJT003K008-1 CONNECTOR(8P) 5 K1KA08C00002
CP906 SJT30745JQ CONNECTOR(7P) 1 K1KA07B00053
D601,02 MA165 DIODE 2 MA2C165
D604 MA4160M DIODE 1 MAZ41600M
D606-08 MA165 DIODE 3 MA2C165
D701-04 P300DLF DIODE 4 B0EAMM000025 /
D705 MA4150M DIODE 1 MAZ41500M /
D706 MA4075M DIODE 1 MAZ40750M /
D707 1SR35200TB DIODE 1 B0EAKM000076 /
D708 MA167 DIODE 1 MA2C167 /
D710 MA4051M DIODE 1 MAZ40510M /
D712 MA4075M DIODE 1 MAZ40750M /
D751,52 1SR35200TB DIODE 2 B0EAKM000076 /
D753 MA4240H DIODE 1 MAZ42400H
D754 MA165 DIODE 1 MA2C165
D756 MA4068L DIODE 1 MAZ40680L /
D801-04 MA165 DIODE 4 MA2C165
D806 MA165 DIODE 1 MA2C165
D807 1SS291TA DIODE 1
D808 MA165 DIODE 1 MA2C165
D809-13 LN018304P LED 5
D814 LN014304P LED 1
D816-19 LN018304P LED 4
D820 MA165 DIODE 1 MA2C165
D821 1SS291TA DIODE 1
D823-26 MA165 DIODE 4 MA2C165
F1 XBA2C10TB0 FUSE 1 K5D102BL0001 /
FP701 RSFMB05KT-L FUSE PROTECTOR 1 K5G500A00002 /
IC401 NJU7312AL IC 1 C0JZAS000001
IC402 M5218AP IC 1 C0AABB000055
IC451 AN6558F IC 1
18

Ref. No. PartNo. PartName& Description Pcs Remarks
IC471 UPC4570C IC 1
IC601 RSN3502C IC 1
IC801 M37470M2536S IC 1 C2BADB000023
JK401-04 SJF3069N JACK,IN/OUT / TERMINAL 4
JK601 RJJ63TA01 JACK,HEADPHONES 1 K2HB103J0064
JK601,02 RJR0054 JACK,SPEAKERS 2 K4BC04B00012
JK791 SJS9236-1 JACK,AC IN 1 K2AA2B000002 /
L1 RLQZ271M COIL 1 ELF18D293DR /
L601,02 SLQY07G-40 COIL 2 G0ZZ00001629
L801 ELEXT101KA9 COIL 1
P1 RPQ0164 PAD 1
P2 RPF0139-1 PROTECTION BAG / (F.B.) 1
P3 RPG4289 PACKING CASE 1 (E)
P3 RPG4290 PACKING CASE 1 (EB,EG)
P4 RPN0684-3 CUSHION 1
P5 SPP756 PROTECTION BAG 1
P6 RPH0032 SHEET 1 (EB)
PCB1 REP3179A-M MAIN P.C.B.ASS'Y 1 [RTL]
PCB2 REP3181A-S P.C.B.ASS'Y 1 [RTL]
PCB3 REP3183A-P P.C.B.ASS'Y 1 [RTL](E,EG)
PCB3 REP3183B-P P.C.B.ASS'Y 1 [RTL](EB)
Q505-08 2SD1915FTA TRANSISTOR 4
Q601-05 2SC3311AR TRANSISTOR 5
Q606 2SA1309AR TRANSISTOR 1
Q702 2SD2037EFTA TRANSISTOR 1
Q751 2SC2458GR TRANSISTOR 1
Q803 UN4211 TRANSISTOR 1 UNR4211
Q804-09 UN4111 TRANSISTOR 6 UNR4111
Q810 UN4211 TRANSISTOR 1 UNR4211
Q812 UN4211 TRANSISTOR 1 UNR4211
Q813,14 UN4111 TRANSISTOR 2 UNR4111
Q815 2SA1309AR TRANSISTOR 1
Q816 2SK330GRYTA TRANSISTOR 1
Q817 DTA124ESTP TRANSISTOR 1 B1GCCFLL0003
Q818 2SC3311AR TRANSISTOR 1
R401,02 ERDS2FJ102 1/4W1K 2
R405-16 ERDS2FJ102 1/4W1K 12
R423,24 ERDS2FJ102 1/4W1K 2
R425-27 ERDS2FJ103 1/4W10K 3
R429,30 ERDS2FJ104 1/4W100K 2
R431,32 ERDS2FJ273 1/4W27K 2
R449,50 ERDS2FJ121 1/4W120 2
R451,52 ERDS2FJ224 1/4W220K 2
R453,54 ERDS2FJ102 1/4W1K 2
R455,56 ERDS2FJ563 1/4W56K 2
R457,58 ERDS2FJ271 1/4W270 2
R459,60 ERDS2FJ680 1/4W68 2
19

R459,60
ERDS2FJ680
1
/
4W
68
2
20