Motorola V200 Service Manual page 71

Level 3 Service Manual
6881039B10
Troubleshooting the Headset Speaker
Prior to troubleshooting, make sure headset is working. Check headset jack J600,
call processor IC INT1 U1100 pin E8, and R20212.
No Receive Audio.
• Test commands: Suspend, Headset speaker, Volume level, Speakerphone tone.
30000009000000360001000000
3000000A00000006000200004600
30000009000000050001000003
3000000B000000000003000000002A
• Send the above test commands to generate a tone to the headset speaker. If
there is no audio, probe J600 pin 3. If the signal is there yet no audio, replace
J600.
• No signal at the J600 Pin 3, check signal at C1221 and C1212.
• If the signal is coming out of AUDIOOUTP and AUDIOOUTM, check U1200
and the parts associated with A0A, A0B, A3 U1200 amplifiers.
• If no signal is present at C1221 and C1212, either defective U1100 or cold sol-
der / missing power supply to U1100.
Tones Present but No Voice
• Send the following test commands. 13K Loop back with internal speaker and
internal Mic (suspend, CP mode CDMA, AUD_LPB, Headset path UN-muted,
Aud_Lvl 3)
30000009000000360001000000
300000090000000A0001000001
30000009000000040001000003
3000000A00000006000200003600
30000009000000050001000003
• Inject 43.5 mVrms, 1kHz signal to the CE bus connector analog audio input
J1000 pin 16. Check U1100 pins P14 and N15 AUDIOOUTP and
AUDIOOUTM.
• If no signal, check U1100 (ensure U1100 pin P15 MIC1 has the same signal as
the CE bus AUDIO_IN).
• If there is signal (+/-19 mVrms) and the tone can be heard through the speaker,
place the UUT into call with test set (HP8924) with service option 1 with 1Khz
tone enabled. If there is no tone, it could be defective U1100 CSP or RF section.
Troubleshooting the CE Bus AUDIO_OUT
No Receive Audio on the Hands-Free Device
Prior to troubleshooting, make sure the accessory is working.
• Test commands: Suspend, Headset speaker, Volume level, Speakerphone tone.
October 04, 2001
Troubleshooting
67