ERICSSON AF738, AF778 Service of the Telephone CH 5
Service of the Telephone EN/LZB 119 2506 R1A
Chapter 5
Service of the Telephone
Ericsson Cellular Phone AF738
AF778
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EN/LZB 119 2506 R1A Service of the Telephone
SUBJECT .................................................................................... PAGE
Introduction.........................................................................................................5-1
Repair Flow .........................................................................................................5-2
Figure 5-1. Repair Flow.....................................................................................5-2
Table 5-1. Repair Actions..................................................................................5-3
AF738 Internal Components...............................................................................5-4
Figure 5-2. AF738 Internal Components............................................................5-5
AF778 Internal Components...............................................................................5-6
Figure 5-3. AF778 Internal Components............................................................5-7
Common Telephone Failures ..............................................................................5-8
Table 5-2. Common Failures..............................................................................5-8
Required Tools ..................................................................................................5-11
AF738 Disassembly............................................................................................ 5-12
Main Disassembly ........................................................................................... 5-12
AF778 Disassembly............................................................................................ 5-13
Main Disassembly ........................................................................................... 5-13
Replacing The LCD/Lightguide Assembly ....................................................... 5-15
Figure 5-4. Removing Lightguide Assembly.................................................... 5-15
Figure 5-5. Board Revision Level ....................................................................5-16
Figure 5-6. Replacing Lightguide Assembly ....................................................5-17
Replacing the Vibrator Motor Assembly (AF778 Only) ...................................5-18
Replacing the Vibrator Motor..........................................................................5-18
Figure 5-7. Vibrator Motor Assembly..............................................................5-19
Replacing the Vibrator Connector....................................................................5-19
Replacing the Vibrator Wires........................................................................... 5-20
Replacing the Keypad......................................................................................5-20
Replacing the System Connector......................................................................5-20
Reassembly ........................................................................................................ 5-21
AF738 Reassembly ..........................................................................................5-21
AF778 Reassembly ..........................................................................................5-22
Torquing Instructions.......................................................................................5-24
Figure 5-8. Torquing Sequence........................................................................5-24
Return to Service Checkout ..............................................................................5-24
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Service of the Telephone EN/LZB 119 2506 R1A
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Service of the Telephone EN/LZB 119 2506 R1A
Introduction
This chapter contains Level 3 repair procedures for the Ericsson AF738 and AF778
cellular telephones. Please follow the checkout procedures before returning the unit
to Ericsson Product Repair Center.
5-1
EN/LZB 119 2506 R1A Service of the Telephone
Repair Flow
See Figure 5-1 and Table 5-1 for Level 3 repair flow and actions.
From Customer
Visual
Inspection
OK
Go/No Go
Test
OK
On-The-Air Call
OK
Warranty Seal
To Customer
Fail
Fail
Fail
Repair
Fail
OK
Warranty Seal
To higher level
of service
5-2
Figure 5-1. Repair Flow
Service of the Telephone EN/LZB 119 2506 R1A
Table 5-1. Repair Actions
Action Description
Visual Inspection Performed to identify mechanical faults on the phone.
Check for mechanical damages and dust in the
display.
Go/No Go Test Used to measure radio parameters according to
DAMPS specifications.
On-the-Air Call Made to a stationary telephone using a handsfree kit
to verify system connector functionality.
On-the-Air Call/HF Made to a stationary telephone using a handsfree kit
to check system connector functionality if there is
suspicion that HF doesn’t work.
Repair Carried out on replaceable components. After repair
the phone is tested from inspection again
Warranty Seal
Placed over the left torx screw at the bottom.
5-3
EN/LZB 119 2506 R1A Service of the Telephone
AF738 Internal Components
The following are the internal components of theAF738 cellular phone. See
Figure 5-2.
1. Flip
2. Side Volume Keys
3. Front Cover
4. Loudspeaker
5. LCD Display Assembly
6. Buzzer
7. Buzzer Gasket
8. Antenna Connector
9. Antenna
10. Back Cover
11. Battery Connector
12. Antenna Channel
13. System Connector
14. Microphone
15. PCB
16. Keypad
17. Microphone Duct
18. Hinge Inset
Please contact your Regional Service Manager for the latest spare parts list with part
numbers and pricing.
NOTE
The spare parts lists distributed by the Regional Service
Managers are more detailed than the information in this
manual. Please reference the item name and the phone model
when requesting spare parts information.
5-4
Service of the Telephone EN/LZB 119 2506 R1A
1
2
3
4
5
6
7
8
9
11
18
17
16
15
14
13
12
10
Figure 5-2. AF738 Internal Components
5-5
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