Harman Kardon AVR325

Harman Kardon AVR325

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VR74 FRONT R-CH VR72 SURROUND R-CH

AVR325 harman/kardon

28

Table of Contents

Table of Contents1
Service Manual1
Electrostatically Sensitive Devices2
Product Safety Notice2
Esd Warning2
Leakage Testing3
Avr 325 Technical Specifications4
Basic Specifications4
- System Power Control5
- Power Indicator5
- Main Power Switch5
Front Panel Controls5
- Surround Mode Selector6
- Tuning Selector6
- Button6
- Optical 3 Digital Input6
- OSD Indicator7
- Multiroom Indicator7
- Front-Panel Information Display7
- Lower Display Line7
- AM Antenna8
- Preamp Outputs8
- Subwoofer Output8
Rear Panel Connections8
- Front Speaker Outputs9
- AC Power Cord Jack9
- Unswitched AC Accessory Outlet9
- Remote IR Input9
- Video 2 Audio Inputs10
- Coaxial Digital Audio Inputs10
- Video 1 Audio Outputs10
- Video 1 Audio Inputs10
Main Remote Control Functions11
- AM/FM Tuner Select12
- 6-Channel/8-Channel Direct Input:12
- Test Button12
- Sleep Button12
- Logic 7 Mode Select Button13
- DTS Digital Mode Selector13
- Dolby Mode Selector13
- OSD Button13
- System Installation14
- Audio Equipment Connections14
- Video Equipment Connections14
Installation and Connections14
- System and Power Connections15
- Video Connection Notes15
- Installation Connections15
- Multiroom Connections15
Troubleshooting Guide17
Processor Reset17
Service Bulletin # H/K2003-0518
Service Bulletin # H/K2004-0419
- Bottom of Main PCB20
- Before Modification20
- After Modification20
- Surround Back Amp Idle Current Adjustment Procedure21
- Specialized Equipment/Parts Needed21
- Main Amp Idle Current Adjustment Procedure21
- Troubleshooting Tips and Solutions to Common Service Problems22
- Check and Replace22
Tech Tip Hktt2003-0122
Exploded View23
Exploded View Parts List24
- AVR325/525 Alignment Spec.26
- Main B'D26
- P802 Surround R-Ch27
- Vr73 Surround L-Ch27
- P804 Front R-Ch27
- Vr71 Front L-Ch27
Amplifier Bias Adjustment27
- Vr74 Front R-Ch28
- Vr72 Surround R-Ch28
- Back Surround B'D29
- P301 Vr31 Back Surround L-Ch29
- P308 Center-Ch29
- Vr51 Back Surround R-Ch30
Block Diagram31
- AVR325 Electrical Parts List32
- Surround Pcb33
Pcb Drawings83
- PCB Drawings84
- Description95
- Features95
- Structure95
Semiconductor Pinouts95
- Pin Assignment97
- Microcomputer IC97
- CMOS 8-Bit Single Chip97
- CMOS 8-Bit Single Chip Microcomputer100
- Pin Assignment (Top View)102
- Pin Description103
- Block Diagram/Pin Configuration106
- Truth Table106
- Driver106
- Receiver106
- Applications107
- Monolithic IC MM1501 Series107
- Mm1501108
- Mm1505108
- Mm1511108
- Absolute Maximum Ratings109
- Recommended Operating Conditions109
- Electrical Characteristics109
- Mm1503110
- Mm1504110
- Measurement Procedures112
- Switch Status112
- Quad 2-Input Multiplexer118
- Pin Configuration118
- Connection Diagram118
- Functional Description118
- Ordering Code119
- Logic Symbol119
- Pin Connection and IEC Logic Symbols121
- Input Equivalent Circuit122
- Logic Circuit Diagram126
- 8-Channel Analog Multiplexer / Demultiplexer126
- Hex Inverter128
- Input and Output Equivalent Circuit128
- Pin Connections128
- 24-Bit Stereo A/D Converter for Digital Audio129
- Positive Analog Power130
- Analog Ground130
- Digital Ground130
- Serial Data Output131
- Master Clock131
- Serial Data Clock131
- Positive Digital Power131
- Maximum Ratings133
- Logic Diagram134
- Screen Character137
- Pattern Display Controllers137
- Low-Noise Dual Operational Amplifier139
- Package Outline139
- Equivalent Circuit139
- 5-Input 3Putput Video SW140
- Analog Function Switch142
- Terminals Description143
- Timing of DATA, CK, ST143
- Data Format143
- Hex Inverter (Single Stage)146
- High Speed146
- High Feature 192Khz 24Bit Digital Audio Interface Transceiver147
- Serial Control Mode148
- Parallel Control Mode148
- Pin/Function149
- CMOS Digital IC151
- System Electronic Volume Control152
- Positive Regulators Various Styles154
- Negative Regulators Various Styles154
- Schematic Diagram156
- Composite/Super Video Part157
- Component Video Part158
Wiring Diagram175
Package176

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