Onkyo-DTA9.4-avc-sch维修电路原理图.pdf

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1、DTA-9.4DTA-9.4 RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701 P702 P302 E601 S301 JL701A NAAF-7797 TEMPERATURE CURRENT WARNING OR DC OUTPUT BLACK WHITE P703 R430 INDICATOR P607A P608B OFFSET MODULATOR OPERATION GMUTE PHTCP OUTRL FMUTE ERR +5VC GNDC P303 P601A P601B P704 P608A P607B JL70

2、1B R710 NAAF-7798 L906 P904 P903A P902A D902 RL901 RL902 RL902 T902 T901 AC-H AC-G UDD UDD UDDUJJ UJJ UJJ D102D101D104D103 NAPS-7788 UDD UJJ E985B E990 E988 E991 E989 E986 E982 E984 E981 P996B P801B P801A E987 E983 E985A PRI SEC SEC PRI WHT BLK WHT BLK P101B L103 D907 E904 E902 E901 E903 E905 E906 G

3、ND AC-G2 AC-H2 GND2 RL+ RL- +- 12V INPUT FOR TEST VC+ VC- VC- LIVE PRIDC D136 E113 E112 R139 D133 D161 P903B P131A NAPS-7789 D920D921D922D923 E101 JL9906B Q103 E114 P101A P108 E126E125 E122E121 E124E123 JL132B L101 L102 E102 E192 E191 P161 RL+ GND2 RL- RL+ RL- +12V PROT +12V GND2 PROT TEST VOLTAGE A

4、DJUST VOLTAGE CHECK REGULATED LOW CURRENT TH1 GND2 TH2+ TH2- CTRL1 CTRL2 +B +B +B GND -B PROT +B E -B E173 E174 E175 P9910 P9908A NAPS-7792 E9903 E9902 D9812 D9813 P9907A NAETC-7794 POWER STAND-BY WARNING A K S9801 NASW-7795 P9904A R861 Q801 E881 E806 P801C Q817 T853 P902B P803A T851 T854 T852 NAPS-

5、7790 PRI SEC Q842 E891 E893 E894 E892 E895 Q851 D851 R181 Q881Q882Q883Q884 R848 JL805B E841 AC-H2AC-G2 TH1 PROT +B CTRL1 +B CTRL2 GND2 TH1 TH2- TH2+ P131B P803B NAPS-7791 P9911C JL9906A P9909 NAPS-7793 P9908B P9907B POWER SUPPLY WARNING D9805 AC-H AC-G T9801 YEL BRN P9904 F9801 JL805B R854 NAETC-780

6、2 P997B P995 NAETC-7801 AC-G F901 AC-H P997A P996A WHT BLK WHT BLK NL RED +B P601C BLUE-B RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701 P702 P302 E601 S301 JL701A NAAF-7797 TEMPERATURE CURRENT WARNING OR DC OUTPUT BLACK WHITE P703 R430 INDICATOR P607A P608B OFFSET MODULATOR OPERATION G

7、MUTE PHTCP OUTRL FMUTE ERR +5VC GNDC P303 P601A P601B P704 P608A P607B JL701B R710 NAAF-7798 RED +B P601C BLUE-B RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701 P702 P302 E601 S301 JL701A NAAF-7797 TEMPERATURE CURRENT WARNING OR DC OUTPUT BLACK WHITE P703 R430 INDICATOR P607A P608B OFFSE

8、T MODULATOR OPERATION GMUTE PHTCP OUTRL FMUTE ERR +5VC GNDC P303 P601A P601B P704 P608A P607B JL701B R710 NAAF-7798 RED+B P601C BLUE -B RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701P702 P302 E601 S301 JL701A NAAF-7797 TEMPERATURE CURRENT WARNING OR DC OUTPUT BLACK WHITE P703 R430 INDIC

9、ATOR P607A P608B OFFSET MODULATOR OPERATION GMUTE PHTCP OUTRL FMUTE ERR +5VC GNDC P303 P601A P601B P704 P608A P607B JL701B R710 NAAF-7798 RED+B P601C BLUE-B RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701 P702 P302 E601 S301 JL701A NAAF-7797 TEMPERATURE CURRENT WARNING OR DC OUTPUT BLACK

10、 WHITE P703 R430 INDICATOR P607A P608B OFFSET MODULATOR OPERATION GMUTE PHTCP OUTRL FMUTE ERR +5VC GNDC P303 P601A P601B P704 P608A P607B JL701B R710 NAAF-7798 RED +B P601C BLUE-B RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701P702 P302 E601 S301 JL701A NAAF-7797 TEMPERATURE CURRENT WARN

11、ING OR DC OUTPUT BLACK WHITE P703 R430 INDICATOR P607A P608B OFFSET MODULATOR OPERATION GMUTE PHTCP OUTRL FMUTE ERR +5VC GNDC P303 P601A P601B P704 P608A P607B JL701B R710 NAAF-7798 RED+B P601C BLUE-B RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701 P702 P302 E601 S301 JL701A NAAF-7797 TE

12、MPERATURE CURRENT WARNING OR DC OUTPUT BLACK WHITE P703 R430 INDICATOR P607A P608B OFFSET MODULATOR OPERATION GMUTE PHTCP OUTRL FMUTE ERR +5VC GNDC P303 P601A P601B P704 P608A P607B JL701B R710 NAAF-7798 RED +B P601C BLUE-B JL132A R184 NAETC-7802 INPUT SELECT XLRRCA OUTPUT SURROUND BACK LEFT INPUT S

13、ELECT XLRRCA OUTPUT SURROUND LEFT INPUT SELECT XLRRCA OUTPUT LEFT INPUT SELECT XLRRCA OUTPUT CENTER INPUT SELECT XLRRCA OUTPUT RIGHT INPUT SELECT XLRRCA OUTPUT SURROUND RIGHT INPUT SELECT XLRRCA OUTPUT SURROUND BACK RIGHT AC INLET POWER 12V TRIGGER IN +B -B E SURR BACK LEFT SURR LEFT LEFT CENTER RIG

14、HT SURR RIGHT SURR BACK RIGHT SURR BACK LEFT SURR LEFT LEFT CENTER RIGHT SURR RIGHT SURR BACK RIGHT SURR BACK LEFT SURR LEFT LEFT CENTER RIGHT SURR RIGHT SURR BACK RIGHT To NAAF-7797 To NAAF-7797 To NAAF-7797 To NAPS-7789 +B -B E +B -B E +B -B E +B -B E +B -B E +B -B E +B -B E P9911B P9911A U15 U16

15、U15 U16 U15 U16 U15 U16 U15 U16 U15 U16 U15 U16 U3 U6 U8 U9 U7 U2 U1 U5 U14 U11 U4 SOCKET ASSY NOTES JUMPER WIRE BORAD TO BOARD PC BOARD CONNECTION DIAGRAM HEAT SINK POWER AMPLIFIR PC BOARD HEAT SINK POWER AMPLIFIR PC BOARD HEAT SINK POWER AMPLIFIR PC BOARD HEAT SINK POWER AMPLIFIR PC BOARD HEAT SIN

16、K POWER AMPLIFIR PC BOARD HEAT SINK POWER AMPLIFIR PC BOARD HEAT SINK POWER AMPLIFIR PC BOARD AC INLET PC BOARD 12V TRIGGER TERMINAL PC BOARD DISPLAY LED PC BOARDPOWER SWITCH PC BOARD CONTROL PC BOARD SECONDARY POWER SUPPLY PC BOARD PRIMARY POWER SUPPLY PC BOARD SWITCHING CONTROL PC BOARD TERMINAL P

17、C BOARD TEMPERATRE SENSOR PC BOARD TEMPERATRE SENSOR PC BOARD RadioFans.CN 收音机爱 好者资料库 DTA-9.4 U15 NAAF-7797 U7NAPS-7793 P9911C JL9906A P9909 Q9803 Q9806 P9908B P9907B POWER SUPPLY WARNING D9805 AC-HAC-G 1A/125V T9801 YEL BRN Q9827 P9904 F9801 POWER SUPPLY WARNING D9805 (RED) L505 RL501 RL701 RL502 Q

18、506Q505Q511Q512 E501 P701 P702 E601 JL701A TEMPERATURE CURRENT WARNING OR DC OUTPUT P703 R430 INDICATOR P607A OFFSET MODULATOR OPERATION P601A P601B P704 RED +B P601C BLUE-B INPUT SELECT XLRRCA OUTPUT TEMPERATURE OR CURRENT D751 (RED) MODULATOR OPERATION D710 (ORANGE) DC OUTPUT D705 (RED) OPERATION

19、CHECK-4 OPERATION INDICATOR IN THE UNIT-1 D705 (DC OUTPUT) This LEDTurned on when DC voltage is detected between speaker output terminals. Spealer output relay is turned off while having detected DC voltage. The relay will return automatically, if DC voltage output is lost. D710 (MODULATOR) This LED

20、 shows the state of operation of an modulation circuit. Immediately after a power supply injection, the light is switched on, and this LED will put out the light, if operation of modulation circuit is started. D751 (TEMPERATURE OR CURRENT) This LED is turned on when an unusual temperature rise and u

21、nusual over-current of an amplifier circuit are detected. D9805(POWER SUPPLY WARNING) This LED is turned on when abnormalities arise in the power supply circuit. RadioFans.CN 收音机爱 好者资料库 DTA-9.4 U5 NAPS-7790 R861 Q801 E881 E806 P801C P801C Q812Q813 Q817 Q814 T853 P902B P803A T851 T854 T852 PRI SEC Q8

22、42 E891 E893 E894 E892 E895 Q851 D851 R181 Q881 Q882Q883 Q884 R848 JL805B E841 AC-H2AC-G2 TH1 PROT +B CTRL1 +B CTRL2 GND2 TH1 TH2- TH2+ U1 NAPS-7788 NAPS-7789 D136 E113 E112 R139 D133 D161 P903B P131A D920D921D922D923 E101 JL9906B Q103 E114 P101A P108 E126E125 E122E121 E124E123 JL132B L101 L102 E102

23、 E192 E191 P161 RL+ GND2 RL- RL+ RL- +12V PROT +12V GND2 PROT TEST VOLTAGE ADJUST VOLTAGE CHECK REGULATED LOW CURRENT TH1 GND2 TH2+ TH2- CTRL1 CTRL2 +B +B +B GND -B PROT +B E -B E173 E174 E175 L906 P904 P903A P902A D902 RL901 RL902 RL902 T902 T901 AC-H AC-G UDD UDD UDDUJJ UJJ UJJ D102D101D104D103 UD

24、D UJJ E985B E990 E988 E991 E989 E986 E982 E984 E981 P996B P801B P801A E987 E983 E985A PRI SEC SEC PRI WHT BLK WHT BLK P101B L103 D907 E904 E902 E901 E903 E905 E906 GND AC-G2 AC-H2 GND2 RL+ RL- +- 12V INPUT FOR TEST VC+ VC- VC- LIVE PRI DC P997B TH1 PRO D851 (RED) PRI DC LIVE D907 (RED) PROT D161 (RE

25、D) LOW CURRENT D136 (RED) REGULATED D133 (RED) U2 OPERATION CHECK-5 OPERATION INDICATOR IN THE UNIT-2 D133 (REGULATED) This LED is turned on when the voltage of a secondary power supply output is normal. The detection circuit which is source of the drive about this LED is supervising only the voltag

26、e difference between the positive power supply of secondary voltage, and the negative power supply. D136 (LOW CURRENT) This LED is turned on when a low load measure circuit operates. When the switching power supply of this unit has very little load to a power supply, the voltage of a secondary side

27、output rises rapidly. In such a case, a problem is avoided by lowering voltage. This circuit may operate temporarily at the time of a power supply ON. D161 (PROT) This LED is turned on when the protection circuit of a power supply operates. The protection circuit of a power supply section consists o

28、f following detection circuits. 1. Over voltage detection of a secondary DC output. 2. Thermal detection of primary power supply circuit. 3. Thermal detection of secondary power supply circuit. This LED may be turned on only for a moment. It is because the state of a protection circuit is not held i

29、n NAPS-7789. D907 (PRI DC LIVE) This LED is turned on when the electric charge remains in the primary side capacitor. Do after discharging by resistance and checking putting out lights of this LED, when disassembling a unit. D851 (TH1 PROT) This LED lights up at the time of the usual operation. The

30、light is put out when the thermal protection circuit of a primary power supply section operates. DTA-9.4 OUTPUT Fig-1 CENTER LEFT RIGHT OUTPUT Fig-2 CENTER LEFT RIGHT OUTPUT Fig-3 CENTER LEFT RIGHT OPERATION CHECK-6 CAUTION IN THE CASE OF SPEAKER OUTPUT CHECK The power amplifier circuit of DTA-9.4 i

31、s BTL system. Therefore, in case you check speaker output, should be careful of the following point. 1. Do not connect the minus side OUTPUT terminal, and ground of the unit (Fig-1). 2. Do not connect minus of each OUTPUT terminal. (Fig-2). 3. Cannot check with an oscilloscope between the plus side

32、of an OUTPUT terminal, and Chassis GND. (Fig-3). Oscilloscope Chassis GND of unit Chassis GND of unit DTA-9.4 PowerStandby PowerStandby PowerStandby U2 D136 E113 E112 R139 D133 D161 P903B P131A NAPS-7789 D920D921D922D923 E101 JL9906B Q103 E114 P101A P108 E126E125 E122E121 E124E123 JL132B L101 L102 E

33、102 E192 E191 P161 RL+ GND2 RL- RL+ RL- +12V PROT +12V GND2 PROT TEST VOLTAGE ADJUST VOLTAGE CHECK REGULATED LOW CURRENT TH1 GND2 TH2+ TH2- CTRL1 CTRL2 +B +B +B GND -B PROT +B E -B E173 E174 E175 P161 PROT TEST U15 L505 RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701 P702 P302 E601 S301

34、Q717 JL701A NAAF-7797 TEMPERATURE CURRENT WARNING OR DC OUTPUT BLACK WHITE P703 R430 P504 P503 INDICATOR P607A P608B OFFSET Q604 Q603 MODULATOR OPERATION GMUTE PHTCP OUTRL FMUTE ERR +5VC GNDC Q711 P303 P601A P601B P704 P608A P607B RED+B P601C BLUE-B INPUT SELECT XLRRCA OUTPUT RL701 RL501 RL502 OPERA

35、TION CHECK-1 CURRENT DETECTION OF POWER SUPPLY Notes No load and No signal input. How to check? 1. Connect the power supply card to a wall outlet. 2. Power On the unit. 3. Short-circuit the both ends of P161 on NAPS-7789. 4. Check that it is as follows. Lights Blinks Lights Blinks How to check? 2. C

36、onnect the power supply card to a wall outlet. 4. Power On the unit. 5. Immediately after power switch On. 4. About 1 second after turning On a power supply. 5. About 10 seconds after turning On a power supply. Check Blinks stop Check Check RL501 and RL502 Relays ON. Check RL701 Relays ON. RELAYS AN

37、D INDICATORS DTA-9.4 Rear panel 35Vp-p 200Hz Input GND 3.3k 10k 1SS1333.3k Output GND 0.1 F 0.01 F OPERATION CHECK-2 DC VOLTAGE DETECTION OF POWER AMPLIFIER CIRCUIT Notes No load and No signal input. How to check? 1. Connect the power supply card to a wall outlet. 2. Power On the unit. 3. Set the IN

38、PUT SELECT switch of a rear panel to the RCA side. 4. Apply DC+3V to a RCA terminal. 5. Check that the speaker relay RL701 is turned off. 6. Apply DC+3V to a RCA terminal. 7. Check that the speaker relay RL701 is turned off. Notes 1. Check only one channel at a time. 2. Interrupt a input signal, imm

39、ediately after a speaker relay goes out. 3. Dont change into the state where load was connected to amplifier, more than for 3 seconds. How to check? 1. Set the output of the oscillator into the minimum level. 2. Connect the oscilloscope to the OUTPUT terminal. 3. Output a 200Hz rectangular wave from

40、 an oscillator, and input into a RCA terminal through the appointed differentiation circuit. 4. Turn on the unit. 5. Adjust the output level of oscillator so that the level of the waveform of the OUTPUT terminal become 35 Vp-p. 6. Connect 2-ohms load to the OUTPUT terminal. 7. Check that the speaker

41、 relay RL701 is not turned off . 8. Connect 0.3-ohm load to the OUTPUT terminal. 9. Check that the speaker relay RL701 is turned off immediately. OVER CURRENT DETECTION OF POWER AMPLIFIER CIRCUIT DC+3V or -3V Differentiation circuit. DTA-9.4 U15 P702 E601 Q717 NAAF-7797 WARNING DC OUTPUT TEMPERATURE

42、 CURRENT OR R430 INDICATOR P607A OFFSET Q604 Q603 MODULATOR OPERATION Q711 P601A P601B P704 RED+B P601C BLUE-B POWER AMPLIFIER PC BOARD TEMPERATURE CURRENT OR D751 P703 P703 OPERATION CHECK-3 THERMAL DETECTION OF POWER AMPLIFIER CIRCUIT Notes No load and No signal input. How to check? 1. Connect the

43、 power supply card to a wall outlet. 2. Power On the unit. 3. Short-circuit the both ends of P703 on NAAF-7797. 4. Check that it is as follows. Light Check Short DTA-7 15 13 17 14 16 19 18 NAPS-7791 DISASSEMBLING PROCEDURES-4 DISASSEMBLING OF POWER SUPPLY UNIT Remove 18 soldering. Remove the four sc

44、rews. By disconnect the socket assy P801, You can remove the PCB assy NAPS-7788. Front side Remove the five screws. By doing the following work, You can separate NAPS-7789 and NAPS-7790. 1. Disconnect the terminal PCB assy NAPS-7791. 2. Remove the four screws. By doing the following work, You can se

45、parate NAPS-7790 and the heat sink. 1. Remove two soldering. 2. Remove the six screws. By doing the following work, You can separate NAPS-7789 and the heat sink. 1. Remove four soldering. 2. Remove the nine screws. DTA-9.4 3 1 4 52 DISASSEMBLING PROCEDURES-2 REMOVE A POWERB AMP. UNIT AND A POWER SUP

46、PLY UNIT FROM CHASSIS Remove the three screws. Rear panel Remove the four screws. Remove the eight screws. Front side Front side Power supply unit Move the power supply unit to front side. Take out a power amp. unit from the chassis. Power amp. unit Front side DTA-9.4 9 7 11 128 10 DISASSEMBLING PRO

47、CEDURES-3 REMOVE A POWERB AMP. UNIT AND A POWER SUPPLY UNIT FROM CHASSIS Remove the four screws. Remove the four screws. Remove the two screws. Power supply unit Move the power supply unit to up side. By removing each screw of three copper plates (RETAINER), You can remove an amplifier unit complete

48、ly. NAPS-7788 Soldering side Power supply unit Front side DTA-9.4DTA-9.4 RL501 RL701 P501 P502 P301 RL502 Q506Q505Q511Q512 E501 P701 P702 P302 E601 S301 JL701A NAAF-7797 TEMPERATURE CURRENT WARNING OR DC OUTPUT BLACK WHITE P703 R430 INDICATOR P607A P608B OFFSET MODULATOR OPERATION GMUTE PHTCP OUTRL

49、FMUTE ERR +5VC GNDC P303 P601A P601B P704 P608A P607B JL701B R710 NAAF-7798 L906 P904 P903A P902A D902 RL901 RL902 RL902 T902 T901 AC-H AC-G UDD UDD UDDUJJ UJJ UJJ D102D101D104D103 NAPS-7788 UDD UJJ E985B E990 E988 E991 E989 E986 E982 E984 E981 P996B P801B P801A E987 E983 E985A PRI SEC SEC PRI WHT BLK WHT BLK P101B L103 D907 E904 E902 E901 E903 E905 E906 GND AC-G2 AC-H2 GND2 RL+ RL- +- 12V INPUT FOR TEST VC+ VC- VC- LIVE PRIDC D136 E113 E112 R139 D133 D161 P903B P131A NAPS-7789 D920D921D922D923 E101 JL9906B Q103 E114 P101A P108 E126E125 E122E121 E124E123 JL132B L1