Motorola V200 Service Manual page 72

Troubleshooting
68
30000009000000360001000000
3000000A00000006000200003400
30000009000000050001000003
3000000B000000000003000000002A
• Send the above test commands to generate a tone to CE bus connector
AUDIO_OUT J1000 pin 15. If the signal is present on J1000 pin 15 but no audio,
J1000 may be defective.
• No signal at the J1000 pin 15, check signal at C1221 and C1212.
• If the signal is coming out of AUDIOOUTP and AUDIOOUTM, check
U1200 and the parts associated with A0A, A1 and A4 U1200 amplifiers.
• If no signal is present at C1221 and C1212, either defective U1100 or
cold solder / 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
3000000A00000006000200003400
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 (+/-17 mVrms) and the tone is present on the CE bus
AUDIO_OUT, 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.
Troubleshooting the Speakerphone
No or Low Speakerphone Tones
• Test commands: Suspend, Headset speaker, Volume level, Speakerphone tone.
30000009000000360001000000
3000000A00000006000200002300
30000009000000050001000007
3000000B000000000003000000002A
• Send the above test commands to generate a speakerphone tone to the speak-
erphone.
• If the signal is on the U9925 pin 1, but no audible speakerphone or low
speakerphone, inspect the speakerphone connections and check U9925
pin 6 for DC voltage.
• Otherwise, replace U9925.
• No signal at U9925 pin 1, check signal at C1221 and C1212.
October 04, 2001
CDMA V200
6881039B10