Motorola T2282 Manual de Serviço descarregar pdf (Página 34)

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T2282

6.4 Repair Chart

Table 2. GSM T2282 Cellular Telephone: Troubleshooting and Repair Chart. (Assembly Replacement

Level).

SYMPTOM PROBABLE CAUSE VERIFICATION AND

REMEDY

Personal telephone will not turn on or

stay on

a) Battery pack either discharged

or defective

Replace batteries with known good cells. Power unit

on. If unit powers on OK replace batteries.

If battery is not at fault, proceed to b.

b) Battery connectors open or

misaligned.

Visually inspect the battery connectors on the rear

housing top and bottom. Check for bad alignment or

dirty contacts. Re-align, clean and, if necessary,

replace the rear housing. If battery connectors are not

at fault, proceed to c

c) Logic/RF Board Assembly

Defective.

Remove the Logic/RF Assembly. Substitute a known

good assembly and temporarily reassemble the unit.

Depress the PWR button; if unit turns on and stays

on, disconnect the dc power source and reassemble

the telephone with the new Logic/RF Board

assembly. If unit does not power up proceed to d)

d) Display circuit failure Disassemble unit and remove LCD module and

insert known good module. Insert Battery and

depress PWR button. Ensure unit stays on, if OK

reassemble unit in new housing assembly

2. Personal telephone exhibits poor

reception and/or erratic operation (such

as calls frequently dropping, weak

and/or distorted audio, etc.).

a) Antenna is defective Check to make sure that the antenna is properly

inserted into the front housing. If OK, substitute a

known good antenna. If the fault is still present,

proceed to b.

b) Logic/RF Board Assembly

Defective.

Replace Logic/RF Assembly (refer to symptom 1c).

Verify that the fault has been cleared and

Re-assemble the unit with the new PCB.

3. Display is erratic, or provides

Partial or no display.

a) Mating connections to / from

Display PCB.

Dissasemble unit, and remove display module from

main PCB, check connector for any signs of

corrosion or damage. If damaged proceed to c)

b) Display Module is

Defective.

Substitute a known good Display Module onto the

suspect main board and connect to DC Pwr supply

depress PWR and ensure display is now correct, If

Ok rebuild unit with new Display assembly. If

display assembly is not at fault proceed to c.

c) Logic/RF Board Assembly

Defective.

Replace Logic/RF Assembly (refer to symptom 1c).

Verify that the fault has been cleared and

Re-assemble the unit with the new PCB.

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