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Troubleshooting New Components Theory of Operation/Voltage Regulator - 2
New Components Theory of Operation
New components on the Power Macintosh G3 and Macintosh Server
G3 logic board and new strategies for parts replacement make
troubleshooting these systems significantly different from
previous models. Take a moment to read and understand how each
of these new components interacts with the system.
Voltage Regulator
The voltage regulator module regulates the voltage for the partic-
ular processor used in different Power Mac/Server G3 systems.
The voltage regulator provides an easy way to regulate voltage
without changing specific resistor values on the logic board. When
you replace the logic board, you must transfer the voltage regula-
tor from the old logic board to the new one. (Note: Always try
replacing the voltage regulator to resolve power-on problems
before replacing the logic board.)
- Power Macintosh/Server 1
- G3 Minitower 1
- Hot Issues 2
- Shared Logic Board 4
- Processor Module Vs. Card 4
- Power Supply Jumper 5
- Processor Module Jumper 5
- Warranty Sticker 6
- Power Supply Voltage Setting 6
- ROM DIMM 8
- SDRAM DIMMs 8
- SGRAM Video Memory 9
- EIDE Bus Issue 9
- Master/Slave Support 10
- Ultra Wide SCSI Cable Routing 10
- DVD-ROM Disk Damage 11
- HFS+ Formatted Drives 12
- Power-On Issue 15
- Overview 17
- Features 18
- Data Buses 24
- (Ultra Wide) 26
- Narrow SCSI-1 Bus 28
- Ultra Wide SCSI-3 Bus 29
- Basics Data Buses - 14 30
- EIDE Bus 33
- Support for Master and Slave 35
- Expansion Bays 39
- Basics Expansion Bays - 24 40
- Ultra Wide SCSI Card 41
- Cable Length Limits 44
- 10/100 BaseT Ethernet Card 46
- DVD-ROM Drive Technology 48
- Apple DVD-ROM Drive Specs 56
- Transfer Rate 57
- Disc Format Support 57
- DVD Software Drivers 58
- CD-ROM format and UDF 61
- FireWire Technology 62
- The DDS-3 Tape Drive 71
- Status Lights 73
- Table 5: Status Lights 74
- Operating Environment 76
- The Cuda Chip 77
- Resetting the Logic Board 78
- Sound Output 82
- Sound Input 83
- Video Input and Output 85
- Sync On 89
- 2345678910 91
- The DAV Connector 92
- Voltage Switch 93
- PowerPC G3 and Backside Cache 96
- DIMM Slots 100
- Front View 102
- Rear View 103
- Power Supply 104
- Jumper Block 104
- Fan Installation 105
- Basics Fan Installation - 90 106
- Repair Strategy 107
- USA Ordering 108
- Canadian Ordering 109
- Warranty/AppleCare/ARIS 110
- A little background 111
- The “why” 112
- The PowerPC G3 113
- Processor: Taking 113
- Benefits to the user 114
- Specifications 115
- Introduction 116
- Take Apart 117
- Side Access Panel 118
- Floppy Drive 120
- CD-ROM or 126
- DVD-ROM Drive 126
- Master/Slave Cable 132
- Zip Drive 134
- Hard Drive 143
- Open the Chassis 147
- Speaker Bezel 158
- PCI Cards 162
- Ultra Wide SCSI PCI Card 165
- FireWire PCI Card 172
- Note: The graphic at left 177
- Processor Module 178
- 3 Lift up the clip and 181
- 4 Lift up the heatsink to 182
- 5 Lift the metal lever at 183
- Processor 186
- Logic Board 188
- I/O Card 194
- Voltage Regulator 196
- Modem Card 198
- Chassis Locking 200
- 1 Remove the screw and 201
- Chassis Handle 202
- 1 Lift the retainer latch 203
- Top Cover 204
- I/O Panel 206
- Rear Panel 208
- Stationary Panel 210
- Logic Board Latch 213
- 3 Slide the logic board 215
- Light Pipe/Power 216
- Actuator 216
- Take Apart Chassis - 103 220
- • Bottom drives 220
- • Power supply 220
- • Locking chassis latches 220
- • Chassis handle 220
- Upgrades 221
- PCI or I/O Cards 222
- PCI Slot 223
- 12-Inch PCI Card Guides 223
- I/O Card Screw 223
- DRAM DIMM 225
- Ejector 225
- Ribs (inside slot) 225
- Troubleshooting 234
- Jumper Location J16 238
- Jumper Location J28 239
- I/O Cards 240
- Power Supply Verification 245
- Symptom Charts 250
- Error Chords 257
- Peripherals 265
- CD-ROM Drive 268
- Miscellaneous 269
- Exploded View 270
- Chassis 271
- 922-3298 271
- 922-3636 272
- 922-3240 272
- 922-3268 272
- 922-1203 272
- 922-2739 272
- Audio/ Video Card 273
- RCA-type plug 274
- Tape deck 274
- RCA plugs RCA plugs 274
- S-video plug 276
- Connecting a Television 281
- Update: About Your 284
- Build-To-Order Macintosh 284
- About the Ultra Wide SCSI Bus 286
- Warning 288
- Graphics Card Specifications 289
- The FireWire Bus 290
- Apple FireWire Hardware 290
- Apple FireWire Card Software 291
- 1 Insert the FireWire CD 291
- 4 Restart your computer 291
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