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Technics SU-V300M2 Manual

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

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Summary of Contents for Technics SU-V300M2

  • Page 1 AD0104089C2 Stereo Integrated Amplifier SU-V300M2 Colour (K)...Black Type Areas (E)...Europe. (EB)..Great Britain. (EG)..Germany. SPECIFICATIONS...
  • Page 2 1. Note - The contents changed from Model No. SU-V300M2 (Order No. AD99003072C2) This model [SU-V300M2 (Order No. AD0104089C2)] is changed from Model No. SU-V300M2 (Order No. AD9903072C2) about Printed Circuit Board. So you need to use the service manual...

  • Page 3: Before Repairs

    April 2001 ornot. When the unit is repaired, refer to the table as shown below and confirm IC601 and Part No. of operation P.C.B. SU-V300M2 / SU-V300M2 / (AD903072C2) (AD0104089C2)

  • Page 4: Caution For Ac Mains Lead

    Note: When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and then ON again. 4. Accessories - AC power supply cord for (E) and (EG) areas (RJA0019-1X)........1 pc. - AC power supply cord for (EB) area (RJA0035-2X)........1 pc.
  • Page 5 6. Location of Controls 7. Operation Checks and Component Replacement / Procedures - This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. - For reassembly after operation checks or replacement, reverse the respective procedures.
  • Page 6 described only when 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 shown above.
  • Page 7 7.2. Checking for the main P.C.B. - Follow the (Step 1) - (Step 5) of item 7.1.
  • Page 8 - Check the main P.C.B. as shown below.
  • Page 9 7.3. Replacement for the power IC - Follow the (Step 1) - (Step 3) of item 7.1.
  • Page 10 8. Type Illustration of ICs, Transistors and Diodes 9. Schematic Diagram Notes - This schematic diagram may be modified at any time with the development of new technology.
  • Page 11 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: Unit on/off switch ( S808: Speaker select switch / (SPEAKERS A) S809:...
  • Page 12 some errors in the voltage values, depending on theinternal impedance of the DC circuit tester. No mark : Power ON - Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc.
  • Page 13 : 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...
  • Page 14 Terminal Function Name P17/ O Relay drive signal output SRDY 2 P16/CLK Remote control signal output / (Not used, open) P15/ O LED (PHONO) drive signal SOUT output P14/SIN O LED (TUNER) drive signal output P13/T1 O LED (CD) drive signal output P12/T0 O LED (AUX) drive signal output O LED (TAPE2) drive signal output...

  • Page 15: Replacement Parts List

    Terminal Function Name Power supply terminal 18 RESET System reset signal input 19 P30/INT0 Back up detect signal input 20 P31/INT1 Not used, connected to GND P32/ Power switch signal input / (Not CNTR0 used, connected to GND) P23/ Not used, connected to GND CNTR1 O Strobe signal output for input selector...
  • Page 16 RKM0036D-K TOP CABINET XTBS3+8JFZ1 SCREW RGW0201-K KNOB,VOLUME RHD30070 SCREW RKA0053-A FOOT RMG0332-K RUBBER RGP0389G-K1 FRONT PANEL RGB0031-A TECHNICS BADGE RGL0184A-Q1 PANEL LIGHT 1 RGL0185A-Q PANEL LIGHT 2 RGL0229-Q PANEL LIGHT 3 XTW3+15T SCREW RGU0887A-K2 BUTTON,SPEAKER RGU0889-K BUTTON,TONE RGU1038A-K BUTTON,SELECTOR RGU1685-K...
  • Page 17 Ref. No. Part No. Part Name & Description Remarks C401 ECEA1VKA4R7B 35V 4.7U C402,03 ECBA1E103ZF5 25V 0.01U ECBT1E103ZF5 C404 ECEA1VKA4R7B 35V 4.7U C405 ECBT1H102KB5 50V 1000P F1D1H102A012 C407-22 ECBT1H101KB5 50V 100P F1D1H101A012 C425-28 ECEA1CKS100 16V 10U C451,52 ECEA1VKA4R7B 35V 4.7U C455,56 ECBT1H102KB5 50V 1000P...
  • Page 18 Ref. No. Part No. Part Name & Description Remarks C803 ECBT1C103NS5 16V 0.01U C804 ECA0JM102 6.3V 1000U C805 RCE1HKAR47BG 50V 0.47U F2A1HR47A015 C806 ECEA1HKS2R2 50V 2.2U C807 ECEA1EKS4R7 25V 4.7U CN601 RJU057W007 CONNECTOR(7P) K1KB07B00017 CN701 RJS1A6606T1 CONNECTOR(6P) K1MP06A00009 CN751-55 RJS1A1101T1 CONNECTOR(1P) CN757 SJS305-1...
  • Page 19 Ref. No. Part No. Part Name & Description Remarks IC471 UPC4570C IC601 RSN3502C IC801 M37470M2536S C2BADB000023 JK401-04 SJF3069N JACK,IN/OUT / TERMINAL JK601 RJJ63TA01 JACK,HEADPHONES K2HB103J0064 JK601,02 RJR0054 JACK,SPEAKERS K4BC04B00012 JK791 SJS9236-1 JACK,AC IN K2AA2B000002 / RLQZ271M COIL ELF18D293DR / L601,02 SLQY07G-40 COIL G0ZZ00001629...
  • Page 20 R459,60 ERDS2FJ680 1/4W 68...
  • Page 21 Ref. No. Part No. Part Name & Description Remarks R461,62 ERDS2FJ184 1/4W 180K R463,64 ERDS2FJ123 1/4W 12K R465,66 ERDS2FJ563 1/4W 56K R467,68 ERDS2FJ102 1/4W 1K R475,76 ERDS2FJ471 1/4W 470 R477,78 ERDS2FJ104 1/4W 100K R479,80 ERDS2FJ474 1/4W 470K R485,86 ERDS2FJ223 1/4W 22K R487-90 ERDS2FJ392 1/4W 3.9K...

  • Page 22: Cabinet Parts Location

    R801 ERDS2FJ103 1/4W 10K Ref. No. Part No. Part Name & Description Remarks R803 ERDS2FJ103 1/4W 10K R805,06 ERDS2FJ103 1/4W 10K R807 ERDS2FJ104 1/4W 100K R808-10 ERDS2FJ103 1/4W 10K R811 ERDS2FJ821 1/4W 820 R812 ERDS2FJ102 1/4W 1K R813 ERDS2FJ122 1/4W 1.2K R814 ERDS2FJ152 1/4W 1.5K...
  • Page 24 17. Packaging...
  • Page 25 F010400000YM/KH...
  • Page 26 This circuit board diagram may be modified at any time with the development of new technology. OPERATION P.C.B. 1 2 3 4 5 6 7 CP906 R826 D814 VOLUME P.C.B. (TAPE1 MONITOR) Q809 B C E CP902 D813 (TAPE2) CN905 Q808 B C E B C E...
  • Page 27 TONE AMP P.C.B. S807 (POWER) CN601 stand by 1 2 3 4 5 6 7 D818 D819 HEADPHONES D824 R819 JACK P.C.B. B C E Q813 D823 R820 B C E R808 Q814 Q810 (BASS) C561 B C E JK601A Q812 R493 R817...
  • Page 28 MAIN P.C.B. SPEKERS TAPE 2 TAPE 1 PHONO TUNER [REC(OUT)] [PLAY(IN)] [REC(OUT)] [PLAY(IN)] JK401 JK402 JK403 JK404 JK602 JK601 C409 C417 C623 C622 R409 R452 C452 C625 C451 E401A RL602 R456 R450 R455 IC401 C457 C456 R458 Q605 C458 E C B R460 R653 C466...

  • Page 29: Power Supply Pcb

    POWER SUPPLY P.C.B. AC IN 230V ... [EZ,EGZ] 230-240V ..[EBZ] 50/60Hz R751 C775 B C E Q751 R752 D753 W701 JK791 C753 RL751 REP3183A-P ..[EZ,EGZ] REP3183B-P ..[EBZ] W751 F1 T1A For [EZ,EGZ] areas. CN757 For [EBZ] area. CN757 (Power transformer) W751...

  • Page 30: Schematic Diagram

    SCHEMATIC DIAGRAM-1 Note: The number which noted at the connectors on the schematic diagram as "SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2" indicates the schematic diagram serial number located on the left corner in the schematic diagram. :POSITIVE VOLTAGE LINE :PHONO SIGNAL LINE MAIN CIRCUIT VOLUME CIRCUIT (CN902) on SCHEMATIC...
  • Page 31 SCHEMATIC DIAGRAM-2 MAIN CIRCUIT (CN903) MAIN CIRCUIT (CN904) on SCHEMATIC DIAGRAM-3 on SCHEMATIC DIAGRAM-3 :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE TONE AMP CIRCUIT E501 :PHONO SIGNAL LINE CP904 CP903 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 A B C D CP905 15.4V...
  • Page 32 SCHEMATIC DIAGRAM-3 :POSITIVE VOLTAGE LINE :PHONO SIGNAL LINE MAIN CIRCUIT :NEGATIVE VOLTAGE LINE :REC OUT SIGNAL LINE -15.4V R461 R463 C463 R467 180K 35V4.7 R459 C459 C461 0.022 6800P R453 C451 R449 C455 35V4.7 1000P PHONO SIGNAL -15.4 V JK401 IC451 PHONO AN6558F...
  • Page 33 SCHEMATIC DIAGRAM-4 :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :PHONO SIGNAL LINE IC601 Q816 RSN3502C 2SK330GRYTA POWER AMP LED DRIVE -16.3V -15.4V -35.3V 3.5V -4.4V 35.1V 0V -4.4V C602 R602 25V3.3 1.8K C610 R607 L601 RL601 1000P 0.7 H C601 R601 C609 C607 R609...

  • Page 34: Power Supply Circuit

    SCHEMATIC DIAGRAM-5 :POSITIVE VOLTAGE LINE :PHONO SIGNAL LINE JK601 SPEAKERS JK602 POWER SUPPLY CIRCUIT RL751 D751,752 1SR35200TB D751 D753 R754 R753 MA4240MTA D752 D754 R751 MA165TA 1.2K 0.7V Q751 2SC3312RSTTA W701 W751 RELAY DRIVE FP701 RSFMB05KT-L For [EZ,EGZ] areas. JK791 F1 T1A CN757 AC IN...
  • Page 35 M5218AP M37470M2536S RSN3502C 2SD2037EFTA UPC4570C 8PIN NJU7312AL 28PIN AN6558F 8PIN No.1 2SC3327ABTP LN014304P P300DLF 2SK330GRYTA DTA124ESTP LN018304P 2SA1309AQTA 2SA1309ARTA 2SC3311ARTA Cathode Anode 2SC3312RSTTA Cathode 2SC2785FETA UN4111TA UN4211TA Anode MA4150MTA 1SS291TA MA4051MTA MA165TA MA4160MTA MA4068LTA MA167ATA MA4240MTA MA4075MTA 1SR35200TB Cathode Cathode Cathode Cathode Anode...
  • Page 36 TAPE 1 TAPE 2 SPEAKERS TUNER [PLAY [REC [PLAY [REC PHONO POWER SUPPLY P.C.B. (IN)] (OUT)] (IN)] (OUT)] AC IN W701 W751 ..CN701 MAIN P.C.B. (Power transformer) POWER TRANSFORMER ..P.C.B.
  • Page 37 VOLUME OPERATION BASS TREBLE BALANCE INPUT SELECTOR TONE PHONES SPEAKERS TAPE 1 TAPE 2 TUNER PHONO MONITOR DEFEAT Name Name 2 Operation indicator (OPERATION) 1 Unit on/off button ( I) and standby When the power is switched ON, this indicator illuminates after indicator ( about 2 seconds when the unit is in the operating condition.
  • Page 38 NOTES : PHONO SIGNAL LINE NJU7312AL : REC OUT SIGNAL LINE IC401 AN6558F M5218AP ) indicates pin No. Right channel. INPUT SELECTOR IC451 IC402 PHONO EQ AMP BUFFER AMP RIAA UPC4570C IC471 [ L ch ] (27) TONE AMP VR501-1 PHONO (VOLUME) Q815...