Apple Power Macintosh G3 Minitower Spécifications Page 245
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Troubleshooting Power Supply Verification/Verification Procedure - 11
Power Supply Verification
The Power Macintosh G3 logic board requires a “trickle” power
of +5V to start up. If the system fails to start up, follow the
procedure outlined below to determine whether the problem is
related to the power supply.
Note:
To verify the power supply, you need a volt meter.
Verification Procedure
Follow the procedures in the Take Apart chapter to access the
power supply.
Important:
For this verification procedure when connecting the
volt meter leads to specific pins, ensure the power supply cable
remains securely plugged into the power supply 20-pin connec-
tor on 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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