Apple 550C Bedienungsanleitung PDF herunterladen (Seite 28)

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Troubleshooting AC Adapter Voltage Test - 3

AC Adapter Voltage Test

To test the AC adapter voltage,

• Use narrow test probes for the leads on your voltmeter

• Make all measurements with the negative or common lead

touching the outer shield of the connector (ground)

• Use the following table to identify the connector pin number,

signal name, and DC voltage present

Connector Pin Signal DC Voltage

1 VBATT 16.4–16.6V

2 VMAIN 16.4–16.6V

3 GND 0V

4 GND Sense 0V

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 173 174

Macintosh PowerBook 550c 1
General Information 3
Rear Panel 4
PowerBook Screw Matrix 5
PCMCIA Module Handling 8
Battery Information 10
Battery Handling 11
Processor 14
Disk Storage 16
I/O Interfaces 17
I/O Devices 19
Sound and Video 20
Electrical 21
Physical 22
Environmental 23
Troubleshooting 25
General 26
Power Manager Reset 27
AC Adapter Voltage Test 28
Symptom Charts 29
Floppy Drive 38
Peripheral 42
Internal Modem 49
Miscellaneous 55
Take Apart 57
Battery/PCMCIA 58
Battery Contact Cover 61
Keyboard 63
Insulator 70
Display Access 74
Display Assembly 76
Interconnect-to-Logic 77
Board Cable 77
Center Base Cover 79
Screw Carrier 81
Floppy Drive Cable 84
Locking Tab 86
Right Bracket 88
EMI Shield 90
Daughterboard 90
RAM Expansion Connector 94
Daughterboard Connector 94
Small Screw 96
Trackpad Cable Connector 98
Take Apart Fuse - 44 101
Using a small flat-blade 101
Interconnect-to 102
Logic-Bd. Cable 102
Interconnect 103
CPU Stiffener 106
Left Side Panel 107
EMI Clip 110
Clutch Peg 110
Lifter Foot 112
Sound-In 114
Sound-Out 114
Standoff & Peg 114
Positioning Peg 116
Hard Drive 118
Door Peg 120
Take Apart Bottom Case - 65 122
• CPU stiffener 122
• Motherboard 122
Microphone 123
Assembly 123
Microphone Cable 124
Microphone Assembly 124
1 Using a small flat-blade 126
Backup Battery 127
Cable Connector 127
Backup Battery Cable 127
Cable Guides 127
Trackpad Cable 130
Assembly Connector 130
Trackpad Logic 132
Speaker Cable 134
Display Bezel 136
Display Cable 138
Backlight 138
Inverter Board 140
Inverter Cable 141
Interconnect Board 145
Interconnect-to-Display Cable 147
Connector 147
Display EMI 150
Remove the display EMI 151
Display Rear 152
Upgrades 153
RAM Card 154
Expansion Connector 155
RAM Card Guides 155
Modem and DAA 158
Modem Cap 160
Modem Card 160
PCMCIA Module 164
Left Battery Bay 165
Additional Procedures 167
Battery 168
Verification 168
Backup Battery Verification 170
Adapter 172
Exploded View 173
Exploded View 1 174
PowerBook 550c 174

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