Motorola C43 Service Manual - Page 40

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Troubleshooting

Troubleshooting Chart

Table 3. PF C25 and C43 Telephones: Level 1 and 2 Troubleshooting Chart

SYMPTOM

1. Telephone will not turn on or stay on.

2. Telephone exhibits poor reception or

erratic operation such as calls frequently

dropping or weak or distorted audio.

3. Display is erratic, or provides partial or

no display.

4. Incoming call alert transducer audio

distorted or volume is too low.

5. Telephone transmit audio is weak.

(usually indicated by called parties

complaining of difficulty in hearing voice).

6. Receive audio from earpiece speaker is

weak or distorted.

PROBABLE CAUSE

a) Battery either discharged or

defective.

b) Battery terminals open or

misaligned.

c) Transceiver board assembly

defective.

a) Antenna assembly defective.

b) Transceiver board assembly

defective.

Transceiver board assembly defective. Replace the transceiver board assembly (refer

a) Defective alert transducer.

b) Faulty transceiver board assembly. Replace the transceiver board assembly (refer

a) Microphone misaligned or

defective.

b) Transceiver board assembly

defective.

a) Earpiece speaker defective.

August 01, 2001

Product Family C25 and C43

VERIFICATION AND REMEDY

Measure battery voltage across a 50 ohm (>1

Watt) load. If the battery voltage is <3.25 Vdc,

recharge the battery using the appropriate

battery charger. If the battery will not recharge,

replace the battery. If battery is not at fault,

proceed to b.

Visually inspect the battery terminals on both

the battery and the telephone. Realign and, if

necessary, either replace the battery or refer to

a Level 3 Service Center for the battery

connector replacement. If battery terminals are

not at fault, proceed to c.

Remove the transceiver board 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 transceiver board

assembly. Verify that the fault has been cleared.

Check to make sure that the antenna terminal

makes proper contact with the transceiver board

assembly. If connected properly, substitute a

known good antenna. If the fault is still present,

proceed to b.

Replace the transceiver board assembly (refer

to 1c). Verify that the fault has been cleared and

reassemble the unit with the new transceiver

board assembly.

to 1c). Verify that the fault has been cleared and

reassemble the unit with the new transceiver

board assembly.

Replace alert transducer according to the

procedures. If fault still present, proceed to b.

to 1c). Verify that the fault has been cleared and

reassemble the unit with the new transceiver

board assembly.

Ensure microphone is correctly positioned in

socket. If fault still present, replace the

microphone as described in the procedures. If

fault is not cleared, proceed to b.

Replace the transceiver board assembly (refer

to 1c). Verify that the fault has been cleared and

reassemble the unit with the new transceiver

board assembly.

Temporarily replace the LCD speaker assembly

with a known good assembly. Ensure good

connection. Place a call and verify improvement

in earpiece audio. If fault is cleared, reassemble

the phone with the good assembly. If fault is not

cleared, proceed to b.

6881039B15