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1、 harman/kardon Service Manual AVR 255/230 7 x 50W 7.1 CHANNEL A/V RECEIVER CONTENTS ESD WARNING 2 BASIC SPECIFICATIONS 3 TROUBLESHOOTING GUIDE 4 PROCESSOR RESET 4 REMOTE RESET 5 PACKAGE LIST AND PARTS 6 DISASSEMBLY 7 EXPLODED VIEW AND PARTS 8 ELECTRICAL PARTS LIST 9 SEMICONDUCTOR PINOUTS 50 PCB DRAW
2、INGS 121 BLOCK DIAGRAM 129 WIRING DIAGRAM 130 AMP BIAS ADJUSTMENT 131 SCHEMATIC DIAGRAMS 132 Released EU2008 harman/kardon, Inc. Rev 0, 07/2008 250 Crossways Park Dr. Woodbury, New York, 11797 harman/kardonAVR 255/230 Service Manual Page 1 of 144 RadioFans.CN Eachprecautioninthismanualshouldbefollow
3、edduringservicing. Components identified with the IEC symbolin the parts list are special significance to safety. When replacing a component identified with , use only the replacement parts designated, or parts with the same ratings or resistance, wattage, or voltage that are designated in the parts
4、 list in this manual. Leakage-current or resistance measurements must be made to determine that exposed parts are acceptably insulated from the supply circuit before retuming the product to the customer. Some semiconductor (solid state) devices can be damaged easily by static electricity. Such compo
5、nents commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static el
6、ectricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed
7、for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge build-up or exposure of the assembly. 3. Use only a grounde
8、d-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical c
9、hange sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conduct
10、ive material.) 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Be sure no power is applied to the chassis or circuit, and observe all other safe
11、ty precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together or your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES devices. CAUTION :
12、harman/kardonAVR 255/230 Service Manual Page 2 of 144 RadioFans.CN 2 TECHNICAL SPECIFICATIONS 57 ENGLISH Technical Specifications Audio Section Stereo Mode Continuous Average Power (FTC) 65Watts per channel, 20Hz20kHz, 0.07% THD, both channels driven into 8 ohms 7 Channel Surround Modes Power Per In
13、dividual Channel, all channels driven simultaneously: Front L MM 200V DESCRIPTION The 74LCX32 is a low voltage CMOS QUAD 2-INPUT OR GATE fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications; it can be inter
14、faced to 5V signal environment for inputs. It has same speed performance at 3.3V than 5V AC/ACT family, combined with a lower power consumption. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. 74LCX32 L
15、OW VOLTAGE CMOS QUAD 2-INPUT OR GATE WITH 5V TOLERANT INPUTS Figure 1: Pin Connection And IEC Logic Symbols Table 1: Order Codes PACKAGET UDQS correspond to the data on DQ8-DQ15 SYMBOLTYPEDESCRIPTION DM (x8) Input Input Data Mask: DM is an input mask signal for write data. Input data is masked when
16、DM is sampled HIGH along with that input data during a WRITE access. DM is sampled on both edges of DQS. Although DM pins are input only, the DM loading matches the DQ and DQS loading. For the x16, LDM corresponds to the data on DQ0-DQ7; UDM corresponds to the data on DQ8-DQ15. Input / Output VrefIn
17、putSSTL_2 reference voltage. UDQS, LDQS (x16) UDM, LDM (x16) harman/kardonAVR 255/230 Service Manual Page 58 of 144 RadioFans.CN DS586PP517 CS42528 2. PIN DESCRIPTIONS Pin Name#Pin Description CX_SDIN1 CX_SDIN2 CX_SDIN3 CX_SDIN4 1 64 63 62 Codec Serial Audio Data Input (Input) - Input for twos compl
18、ement serial audio data. CX_SCLK2CODEC Serial Clock (Input/Output) - Serial clock for the CODEC serial audio interface. CX_LRCK3CODEC Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on the CODEC serial audio data line. VD4 51 Digital Power (Input) - Pos
19、itive power supply for the digital section. DGND5 52 Digital Ground (Input) - Ground reference. Should be connected to digital ground. VLC6Control Port Power (Input) - Determines the required signal level for the control port. SCL/CCLK7Serial Control Port Clock (Input) - Serial clock for the serial
20、control port. Requires an external pull-up resistor to the logic interface voltage in I2C mode as shown in the Typical Connection Diagram. SDA/CDOUT8Serial Control Data (Input/Output) - SDA is a data I/O line in I2C mode and requires an external pull-up resistor to the logic interface voltage, as sh
21、own in the Typical Connection Diagram. CDOUT is the output data line for the control port interface in SPI mode. AD1/CDIN9Address Bit 1 (I2C)/Serial Control Data (SPI) (Input) - AD1 is a chip address pin in I2C mode; CDIN is the input data line for the control port interface in SPI mode. 1 2 3 4 5 6
22、 7 8 9 10 11 12 13 14 15 16 1718 1920 212223242526272829303132 64636261 605958575655545352515049 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 CX_SDIN1 SAI_SCLK SAI_LRCK VD DGND VLC SCL/CCLK SDA/CDOUT AD1/CDIN AD0/CS INT RST AINR- AINR+ AINL+ AINL- VQ FILT+ REFGND AOUTB4- AOUTB4+ AOUTA4+ AOUTA4- V
23、A AGND AOUTB3- AOUTB3+ AOUTA3+ AOUTA3- AOUTB2- AOUTB2+ AOUTA2+ AOUTA2- AOUTB1- AOUTB1+ AOUTA1+ AOUTA1- MUTEC AGND VARX RXP7/GPO7 RXP6/GPO6 RXP5/GPO5 RXP4/GPO4 RXP3/GPO3 RXP2/GPO2 RXP1/GPO1 LPFLT RXP0 TXP VD DGND VLS SAI_SDOUT RMCK CX_SDOUT ADCIN2 ADCIN1 OMCK CX_LRCK CX_SCLK CX_SDIN4 CX_SDIN3 CX_SDIN
24、2 CS42528 harman/kardonAVR 255/230 Service Manual Page 59 of 144 RadioFans.CN CS42528 18DS586PP5 AD0/CS10 Address Bit 0 (I2C)/Control Port Chip Select (SPI) (Input) - AD0 is a chip address pin in I2C mode; CS is the chip select signal in SPI mode. INT11Interrupt (Output) - The CS42528 will generate
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