Motorola Confidential
Proprietary
V80
Audio Design of V80
• Triplets based platform ICs
• Neptune IC
- contains the audio DSP
• PCAP IC
- contains the CODEC, stereo DAC, audio amplifiers &
audio control logic circuits
Note: Neptune CODEC not used, uses only PCAP CODEC
Motorola Confidential
Proprietary
V80
PCAP Tx Audio
PCAP Tx Audio
MK 1200
3 mic input paths
• Handset mic : AUX_MIC-
• Headset mic : MIC_IN-
• CE mic : EXT_MIC
HJACK MIC
INT_MIC+
Motorola Confidential
Proprietary
V80
PCAP Rx Audio
J1260
LS1
4 spkr output paths
• Handset Spkr : SPKR+/-
• Headset Spkr : ARIGHT_OUT
• Alert Spkr : ALRT+/-
• CE Spkr : EXTOUT
Alert Spkr
Motorola Confidential
Proprietary
V80
Handset Audio Loopback Check
Objective: To check that handset mic & spkr are both functional
Step 1: Setup
Use RadioComm
• Put phone in suspend mode
• Set AUD_PATH : Input- Internal Mic
Output- Internal Spkr
• Set AUD_LVL=15
• User must hear feedback from mic to spkr when mic is being rubbed
Motorola Confidential
Proprietary
V80
If loopback fails:
Step 2: Check Transceiver board
Verify mic input path into PCAP
• Measure MIC_BIAS1 =2.1V (R1001 inside PCAP shield SH 900)
• Measure INT_MIC+ = 0.7V (C1001 inside PCAP shield SH 900)
Verify spkr output path from PCAP
Under AUD_TN_GEN
Set Frequency : 1000Hz
Set Level 1 : 7FFF (default)
• Probe 1KHz signal to verify at
SPKR+ : R1210
SPKR- : R1211 ( located at 60 BB connector)
Motorola Confidential
Proprietary
V80
Headset Audio Loopback Check
Objective: To check that headset mic & spkr are both functional
Step 1:Setup
Use RadioComm
• Put phone in suspend mode
• Set AUD_PATH : Input- Boom Mic
Output- Boom Spkr
• Set AUD_LVL=15
• User must hear feedback from mic to spkr when mic is being rubbed
Motorola Confidential
Proprietary
V80
If loopback fails:
Step 2: Check Transceiver board
Verify mic input path into PCAP
• Measure MIC_BIAS2 =2.1V (R1020 inside PCAP shield SH
901)
• Measure HJACK_MIC = 1.4V (C1241 besides
headset jack J1240)
• Measure HJACK _DET (
VR1241 besides headset jack J1240)
= 2.7 V (headset unplugged)
= 0 V (headset plugged)
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Proprietary
V80
Verify spkr output path from PCAP
• Make a call connection between HP8922 & phone
• Demodulation Modulating speech out connected to scope
at CH1
• 1KHz signal from Sig Gen to modulation speech in at
HP8922
• Plug in headset
• Probe signal from scope CH2 at ARIGHT_OUT (C1034
inside
PCAP shield SH900)
HP8922M GSM/DCS/PCS RF Set
HP35670A Dynamic Signal Anal.
Demodulation Out
Mon/Speech
Input
CH1
1 2 3
4 5 6
7 8 9
listen for
RX buzz
measure TX buzz -
shh, no talking!
Scope
Modulation In
AM/ Speech
Signal Gen
Motorola Confidential
Proprietary
V80
CE Audio Check
Objective: To check that CE mic & spkr are both functional
Verify spkr output path from PCAP
• Setup same as headset test setup
• Plug in CE accessories
• Probe signal from scope CH2 at AUDIO_OUT (R1055 inside
PCAP shield SH900)
Motorola Confidential
Proprietary
V80
Alert Spkr Check
Verify spkr output from PCAP
Step 1:Setup
Use RadioComm
• Put phone in suspend mode
• Under Alert
Enabled Classic
• Probe signal at ALRT+ : C1063
ALRT- : C1064
(Inside PCAP shield SH900)