30 terms

Ch 11 Hardware Service Issues

Study Guide Ch 11 Hardware Service Issues
STUDY
PLAY
Using available Apple resources, locate the AppleCare name for computers with the following serial numbers:

1. QP63401PVUV
2. G86353DWUQ2
3. 4H6181GYVMM
4. W8618001THY
# QP63401PVUV - iMac (Late 2006)
# G86353DWUQ2 - Mac Pro
# 4H6181GYVMM - MacBook
# W8618001THY - MacBook Pro (17-inch)
Hardware Upgrades
Hardware upgrades are more complex if they require an internal installation.
Software Upgrades
Software upgrades on Mac computers can be made by using Software Update from within the Mac OS, installing a major OS upgrade via a number of installation options, or by installing new applications.
Where is the serial number located physically on a MacBook Pro?
The MacBook Pro's serial number and Ethernet ID (also called a MAC address) are located on the bottom of the computer, underneath the battery, in the battery bay.
Why Upgrades Matter to Service Technicians
Upgrades impact your work when you are trying to add capabilities to a customer's Mac.
The requirements for Mac OS X v10.6.
1. Mac computer with an Intel processor
2. 1GB of memory
3. 5 GB available space on hard disk
4. Hard disk must be formatted as Mac OS Extended format.
5. DVD drive for installation from DVD media
Key Points

What you need to know

* The MacBook Pro (17-inch, Mid 2010) is the first product to use the 12-digit serial number format
* The 12-digit format changes the serial number algorithm, using different characters for the:
- Plant code
- Year
- Week
- Configuration
* Support tools and systems have been updated to support the 12-digit format
* The MacBook Pro (17-inch, Mid 2010) is the first product to use the 12-digit serial number format
* The 12-digit format changes the serial number algorithm, using different characters for the:
- Plant code
- Year
- Week
- Configuration
* Support tools and systems have been updated to support the 12-digit format
Plant Code
11-Digit Format
Serial Number Algorithm Comparison
PP
Two-digit alphanumeric code that indicates the location at which the product was manufactured.

Examples: YM, 5U, 7J, 6Q
6Q914HT3Y7H
Year
11-Digit Format
Serial Number Algorithm Comparison
Y
Single-digit alphanumeric code that indicates the year in which the product was manufactured.

Example: 9=2009
6Q914HT3Y7H
Week
11-Digit Format
Serial Number Algorithm Comparison
WW
Two-digit alphanumeric code to indicate the week of the year during which the product was manufactured.

Examples:
Week 08 = 08
Week 09 = 09
Week 10 = 10
6Q914HT3Y7H
Sequence
11-Digit Format
Serial Number Algorithm Comparison
SSS
Three-digit alphanumeric code to provide a unique sequence to each product.

Example: 1PF
6Q914HT3Y7H
Configuration
11-Digit Format
Serial Number Algorithm Comparison
CCC
Three-digit alphanumeric code that relates to the part number for the product.

Example: Y7H = MB046
6Q914HT3Y7H
Plant Code
12-Digit Format
Serial Number Algorithm Comparison
PPP
Three-digit alphanumeric code that indicates the location at which the product was manufactured.

Example: 2C0
2C0CHPG71C09
YEAR
12-Digit Format
Serial Number Algorithm Comparison
Y
Single-digit alphanumeric code that indicates the year in which the product was manufactured, as well as whether it was manufactured in the first half or second half of the year.

20 base letters:
CDFGHJKLMNPQRSTVWXYZ
(excludes AEIOU and B)

Each year is assigned two base alpha codes, one for the first half of the year and one for the second half.

Examples:
2010 = C (weeks 01-26)
D (weeks 27-52)
2C0CHPG71C09
WEEK
12-Digit Format
Serial Number Algorithm Comparison
W
Single-digit alphanumeric code to indicate the week of the year during which the product was manufactured.

27 base characters:
123456789 and
CDFGHJKLMNPQRTVWXY
(excludes 0, AEIOU, and BSZ)

Each week is assigned a base code. Because there are more weeks in the year than base codes available, the base code repeats, but joins with the appropriate year code (above) to distinguish the overall date code.

Examples:
2010, week 08 = C8
2010, week 34 = D8
2C0CHPG71C09
SEQUENCE
12-Digit Format
Serial Number Algorithm Comparison
SSS
Three-digit alphanumeric code to provide a unique sequence to each product.

Example: 1PF
2C0CHPG71C09
CONFIGURATION
12-Digit Format
Serial Number Algorithm Comparison
CCCC
Four-digit alphanumeric code that relates to the part number for the product.

Example: 1C09 = MCxxx
2C0CHPG71C09
TRUE OR FALSE
How to Find Specifications

Go to the Specifications site at Apple Support:
TRUE
TRUE OR FALSE
Specification Importance

To an Apple Technician the specifications that matter most are:

* Compatibility
* Expansibility
* Capability
TRUE
Applications Compatibility
You may install applications only on a Mac that meets both the hardware and software (OS) requirements of the applications.
RAM Compatibility
RAM that has a completely different design than that used in the computer.
Original iMac G5

You must replace the hard drive in an iMac G5 (17-inch) model.
To access the drive, you remove the back cover and find the following layout:
Fan Zones

On the Power Mac G5, airflow is split into four distinct areas (zones) and each area has its own fans and/or blowers.

The four zones are:
Zone 1 - Optical drive and hard disks
Zone 2 - PCI and AGP Cards
Zone 3 - RAM and processors
Zone 4 - Power supply
Fanning the Problem

With the introduction of the Power Mac G5, Apple had to take some very special steps to handle the processor heat.
There are two components to managing waste heat on the air cooled Power Mac G5. They are:
# Fan zones covering specific components
# Fan control software managed by the OS and SMU
Thermal Grease
Thermal grease is a material that can be used to create a heat bridge between other materials.
Thermal Pads
Thermal pads are used to ensure correct heat transfer between internal components. They are thin adhesive-backed pieces of material. These pads differ greatly in appearance but serve the same purpose.
What A Thermal Sensor Is
Most thermal sensors are actually just made from a simple, inexpensive electrical component called a thermistor. The thermistor body is physically attached (via tape, glue, etc) to the part or component whose temperature is being measured.
How Thermal Sensor Information is Processed
When the thermistor resistance readings get low enough (corresponding to a high enough pre-programmed temperature set-point), then the SMC (System Management Controller) turns on and revs up the fans inside the computer to provide more cooling.

These fans typically blow cool air across the heat sink, cooling it off.
Short Circuit
If the SMC detects (what it thinks is) a high temperature for very long, it will run the fans on high trying in vain to cool the computer (causing fan noise), then it will eventually shut the computer down to protect itself, even if nothing is really overheating.
Disconnection
A disconnected thermal sensor looks to the SMC like a very cold sensor.

In response, the SMC may never turn the fans on even as the computer actually gets hotter, causing a real overheating condition and more serious problems.