JVC-AXM9000-int-sm维修电路原理图.pdf

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1、SERVICE MANUAL No.20933 Apr.2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. AX-M9000 AX-M9000 Area Suffix EContinental Europe MONAURAL INTEGRATED AMPLIFIER Contents Safety precautions -1-2 Disassembly method -1-3 Adjustment method -1-10 Description of major ICs -1-1121 PHASESPEAKER 1211802123 DOWN

2、UP 456 PRESENCE EXT PROCESSORLINE MUTE GA N CONTROL ATTSLEEPEACH MONAURAL INTEGRATED AMPLIFIER AX M9000 STANDBY ON RadioFans.CN 收音机爱 好者资料库 AX-M9000 1-2 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, n

3、o changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the product should not

4、be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom. 3. Many electrical and mechanical parts i

5、n the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these sp

6、ecial safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characte

7、ristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards. 4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts

8、 and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 5. Leakage currnet check (Electrical shock hazard testin

9、g) After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line

10、 isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground

11、. Any leakage current must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor betwee

12、n an exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to eachexposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. No

13、w, reverse the plug in the AC outlet and repeat each measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standards. 2. It is the legal responsibility of the rep

14、airer to ensure that these safety standards are maintained. 3. Repairs must be made in accordance with the relevant safety standards. 4. It is essential that safety critical components are replaced by approved parts. 5. If mains voltage selector is provided, check setting for local voltage. Good ear

15、th ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this syste

16、m. In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. When replacing them, be sure to use the p

17、arts of the same type and rating as specified by the manufacturer. (Except the JC version) RadioFans.CN 收音机爱 好者资料库 AX-M9000 1-3 Remove the three screws A attaching the metal cover on the back of the body. Remove the four screws B attaching the metal cover on both sides of the body using a hexagon wr

18、ench. Draw the metal cover upward from the behind while pulling the both sides of the lower part of the metal cover outward. 1. 2. 3. Disassembly method Removing the metal cover (See Fig. 1) Prior to performing the following procedure, remove the metal cover. Remove the six screws C attaching the to

19、p plate using a hexagon wrench. Remove the six screws D and tow screws D attaching the front panel assembly from the back of the body. Remove the four screws E attaching the front panel assembly from the upper part of the body. Remove the four screws F attaching the front panel assembly on both side

20、s of the body. Disconnect the harness from the connectors CN601, CN602, CN603, CN604 and CN605 of the system control board assembly. Remove the screw G attaching the earth wire. * The front panel assembly of this machine comprises the three sets - the front panel (left), front panel (right) and sub-

21、panel (center). 1. 2. 3. 4. 5. 6. Removing the front panel assembly (See Fig. 2 to 5) Fig.2 Fig.3 B 2 A C E D Fig.4 CN602 CN603 CN604 CN601CN605 Metal cover Fig.1 Top plate Front panel assembly Front panel assembly System control board assembly Fig.5 B 2 F 2 F 2 G Earth wire D AX-M9000 1-4 Removing

22、the rear panel (See Fig.6 to 9) 1. 2. 3. 4. 5. Prior to performing the following procedure, remove the metal cover and front panel assembly. Remove the four screws H attaching the rear panel on the back of the set. Remove the eight screws I attaching the rear panel on the upper part of the set. Remo

23、ve the six screws J, two screws K, nine screws L and one screw M attaching the rear panel. Draw the rear panel upward from the behind at the legs while pulling the rear panel outward. Remove the four screws N attaching the speaker output cord. * If necessary, remove the power plug, connector clamp,

24、etc. Fig.6 Fig.7 Fig.8 H Fig.9 II J L J K J Rear panel L M NNRear panel (Bottom) AX-M9000 1-5 1. 2. Prior to performing the following procedure, remove the metal cover and front panel assembly. Remove the ten screws O attaching the control switch board assembly 1 & 2 on the back side of the front pa

25、nel assembly (left & right sides). Remove the four screws P attaching the metal base on the backside of the sub-panel assembly (center). Remove the four screws Q on the backside of the metal base. Then the display board assembly can be removed. 1. 2. 3. Removing the control switch board assembly 1 &

26、 2 and display board assembly (See Fig.10 to 11) Prior to performing the following procedure, remove the metal cover and front panel assembly. Remove the four screws R attaching the system control board assembly. Disconnect the connectors CN611, CN612, CN613, CN614, CN615 and CN616. Removing the sys

27、tem control board assembly (See Fig. 12) Fig.12 Fig.10 P O O Q R R CN611 CN614 CN613CN616CN612 CN615 Front panel (right) Control switch board (1) Front panel (left) Control switch board (2) Display board System control board assembly Fig.11 Sub-panel Metal base Metal base AX-M9000 1-6 1. 2. 3. 4. 5.

28、 6. 7. 8. Prior to performing the following procedure, remove the metal cover, system control assembly and rear cover. Remove the six through bolts S attaching the heat sink and the heat sink cover. Remove the eleven screws T attaching the power AMP sub-board assembly. Disconnect the harness, which

29、is extending from power transformer, from the connectors TB401, TB402, TB403 and TB404. Disconnect the harness, which is extending from the power transformer for pre-AMP, from the connectors CN401 and CN402. Disconnect the harness, which is extending from the fan, from the connector CN453. Disconnec

30、t the harness, which is extending from the signal processing board, from the connector CN301. After removing each screw U attaching the power AMP sub-board assembly (1) & (2), take off the power AMP sub-board assembly from the heat sink. Remove the seven screws V attaching transistor Q335Q340. Remov

31、ing the power AMP board assembly / heat sink (See Fig. 13 to 15) Fig.14 Fig.13 TB401 TB402 CN402 CN401 11 CN301 CN453 TB403 TB404 Power AMP sub-board assembly (1) (2) Heat sink cover Power AMP board Signal processing board T U S Fig.15 V Transisitor Q335Q340. Power AMP board Heat sink AX-M9000 1-7 P

32、rior to performing the following procedure, remove the metal cover and the rear panel. Remove the current mode source selector board assembly and the rear terminal panel. Remove the five screws Y attaching the signal processing board assembly. Remove the connectors CN251 and CN252. 1. 2. 3. Prior to

33、 performing the following procedure, remove the metal cover and the rear panel. Remove the six screws W attaching the RCA pins on the current mode source selector board assembly. Then, the current mode source selector board can be removed. Remove the four screws X attaching the cannon connector on t

34、he signal processing board. Then, the rear terminal panel can be removed. 1. 2. 3. Removing the current mode source selector board assembly and rear terminal panel (See Fig. 16) Removing the signal processing board assembly (See Fig. 17) Removing the power switch board assembly (See Fig. 18) Prior t

35、o performing the following procedure, remove the metal cover. Remove the four screws Z attaching the power switch board assembly. Remove the cable connecting to the transformer. 1. 2. Fig.17 Fig.18 Fig.16 W X Current mode source selector board assembly Rear terminal panel Y Y Z Signal processing boa

36、rd Power switch board AX-M9000 1-8 1. Prior to performing the following procedure, remove the metal cover. Remove the two screws A attaching the power transformer for pre-AMP. 1. Removing the core transformer for pre-AMP (See Fig. 19) Removing the transformer for power AMP (See Fig. 20) Prior to per

37、forming the following procedure, remove the metal cover and the front panel assembly. Remove the four screws B attaching the power transformer for power AMP. Fig.20 Fig.19 A B Power transformer for pre-AMP Power transformer for power AMP AX-M9000 1-9 CLAMP WR104WR103 WR102 13P 12P 8P CLAMP CLAMP CLA

38、MP Black wire Purple wire Red wire Gray wire Yellow, Brown wire CN insertion Orange, Blue wire CN insertion Red, Black wire CN insertion Fig 1. Fig 2. Arrangement drawings for the clamp binding In order to secure the performance of the machine, refer to the following arrangement drawings when the li

39、nes are clamped. White wire 2 Red wire 2 White RED wire Brown wire S CLAMP Red wire 2 Black wire White wire Red wire S CLAMP S CLAMP S CLAMP AX-M9000 1-10 100Hz More than 70dB 1kHz More than 70dB 10kHz More than 70dB 100Hz More than 70dB 1kHz More than 70dB 10kHz More than 70dB Adjustment method 2.

40、Adjustments and confirmation Remarks Five minutes later after turning the power on Description Standard output Total distortion factor Output level Hum noise Frequency characteristics AC voltage of speaker terminal Adjustments of idling currency Confirmation of idling currency Crosstalk Adjusting me

41、thod 1) INPUT LINE1 - Output at the time of THD0.5% at f=1kHz 1) INPUT LINE1 - Distortion factor at the time of 200W (40.0V) at 8 load 1) Output level at the time when inputting 1kHz 200mV to LINE 1 1) Line 1 1) No signal, no load, Vol. 0.0 1) Prior to turning the power on, turn the R398 countercloc

42、kwise fully 2) After connecting the 3 pin and 4 pin of the CN303 to the electronic voltmeter, adjust the voltage to 2-3mV. 3) After elapsing five minutes, adjust the voltage to 3.5+/-0.5mV. Since there is backlash, thoroughly adjust it. 4) After elapsing two minutes, make sure that the voltage falls

43、 within 3.5-7mV. In case where the voltage does not fall within the specified value, readjust it to the values specified in 3) above. 1) No signal, no load, rated power Confirm under the room temperature of 20-25 1) INPUT LINE 1 - The output at the input terminal side shall be +20dBm as a standard.

44、The CH to be measured shall be terminated at 10k Standard value More than 210W/8 (41.0V) 192mV +/- 10mV Less than +/- 1mV 20Hz Less than 0.04% 1kHz Less than 0.04% 20kHz Less than 0.06% Line1 to Line2 Line1 to Line5 100Hz 1kHz 10kHz Vol. 99. 5 Vol. 99. 5 Vol. 69. 5 Vol. 44. 0 Vol. 99. 5 45.6dB 1dB 4

45、5.6dB 1dB 33.4dB 1dB ATT ON 31.0dB 1dB 5.8dB 1dB 45.6dB 1dB Less than 10mV Less than 0.4mV 1) Line 1 2) Base hum Input short Volume min. 1. List of measuring devices Measuring devices : Electronic voltmeter Oscilloscope Low-frequency transmitter (50Hz-20 kHz of transmitting frequency and output of 0

46、 dBs at the 600 terminal) Distortion factor tester (with a built-in band path filter) AX-M9000 1-11 BU2114F-X (IC542,543,544) : LED controller SIN CK LATCH SOUT EN RST GND GND GND VDD 01 02 03 04 05 06 07 08 1. Pin layout 2. Pin function Symbol SIN CK LATCH SOUT EN RST GND GND GND 08 07 06 05 04 03

47、02 01 VDD 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 I/O I I I O I I - - - O O O O O O O O - Function Serial data input terminal Shift lock of the shift register When this terminal is set at L, the latch output will be secured, In addition, when

48、 the output of the shift register is changed during H, the latch output will be changed simultaneously. Output of the shift register at the final stage Enable terminals of 01 to 08 Reset of the shift register and latch Ground Ground Ground Output of the shift register at the 8th stage Output of the shift register at the 7th stage Output of the shift register at the 6t