Major Frus And Crus - Lenovo ThinkCentre M90a Pro Gen4 Hardware Maintenance Manual

No. Tool name
9 Screw driver: Torx Head
T30
10 Pry tools 1
11 Tweezers (conductive)
12 Tweezers (isolated)
13
Suction cup
14 Hexagonal socket (for
VGA )
15 Hexagonal socket (for
Tiny antenna)
16 Silicone grease for CPU
or heatsink repairing
17 Polyamide tape
18 Mylar tape
19 Eraser
20 Electrical tape
21 Double sided tape
22
Conductive tape
23 Cleaning pads/wipes
24 Heat gun
25 Brown brush
Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air
gaps. The hexagonal socket is used to pick up the antenna connectors.

Major FRUs and CRUs

Your computer contains the following types of CRUs and FRUs:
• Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by
trained service technicians at an additional cost.
• Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill
level. Trained service technicians can also provide service to install or replace the parts under the type of
warranty designated for the customer's machine.
• FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers
choose to replace the FRUs by themselves, the product warranty might be affected.
46
M90a Pro Gen4 Hardware Maintenance Manual
Specific
T30, Shank length greater
than 6 inches, for
heatsink and CPU
N/A
N/A
N/A
N/A
H5 mm or 4.8 mm
H8 mm
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
25 mm to 35 mm wide
Product scope
ThinkSation
All
All
All
All
ThinkCentre/Tiny
ThinkCentre/Tiny
All
All
All
All
All
All
All
All
All
All
Tool type
Common tool
Common tool
Common tool
Common tool
Common tool
Common tool
Common tool
Consumable
Consumable
Consumable
Consumable
Consumable
Consumable
Consumable
Consumable
Special tool
Special tool