Service manual

102 Chapter 4

Assembly Replacement and Post-Repair Procedures

Replacement of Onstage Buffer Unit and Connection Board

Overview

Head amplifier is a module that enlarges signals from the hard disk head. Head amplifier

differs depending on what IC is used in the hard disk that the head is going to be installed.

This section describes a method to replace a head amplifier.

Tools

• T10 TORX driver

Removal of Head Amplifier

Step 1. Shut whole system down.

Step 2. Disconnect cables from the head amplifier.

Step 3. Using TORX driver (T10), remove screws fixing the head amplifier. See Figure 4-4 for

locations of screws.

Figure 4-4 Onstage Buffer Unit and Connection Board

Attachment of Head Amplifier

Step 1. Attach a head amplifier to the HLM with TORX driver (T10) lightly. Pay attention that all

guide pins of the head amplifier are properly inserted into the HLM.

Step 2. Attach an HGA casette to the HLM and see that all pogo pins of the head casette has good