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)

Motorola Confidential

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)