Voice Storage (Gp1280) - Motorola GP Series Service Information

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Voice Storage (GP1280)

( Refer to Figure 2-7 and the VHF Voice Storage schematic diagram)
The Voice Storage feature is offered as standard in the GP1280 and as an Option board for
GP340/GP360/GP380 and GP640/GP680.
The Voice Storage feature enables users to:
Record and Playback Personal Memo (Reminders, Notes, etc.).
Send over-the-air an "Out-Of-Office" message when an incoming call is received but is not
available to take up call.
Over-the-air recording of important voice message being received.
RX_AUD_RTN
VS_GAINSEL
FLAT_RX_SND
EXT_MIC
Figure 2-7 Audio path for voice storage connection to interface connector
Vddd
R708
560K
VDD
C719 VSS
R701
0.1uF
CNTL
18K
R702
18K
U710-2
MC74HC4066
U710-3
MC74HC4066
VDD
VSS
CNTL
C713
0.1uF
C715
0.1uF
CNTL
U710-4
MC74HC4066
CLK
VS_CS
DATA
C707
0.1uF
MISO
R717
1.8K
VDD
VSS
CNTL
U710-1
MC74HC4066
VDD
VSS
VS_AUDSEL
THEORY OF OPERATION
Vddd
CR700
XCLK
SCLK
C704
0.1uF
ANA_NEG AUDOUT
ANA_POS
SS
MOSI
U700
MISO
ISD33000
AMCAP
C705
0.1uF
C708 C709 C710
0.1uF 1000pF 33uF
C714
R716
0.1uF
10K
SWB+
Vddd
U720-1 R710
470K
LM2904
C717
0.1uF
U720-2
LM2904
C718
1000pF
C703
100pF
C701 C702
1uF 0.1uF
Vddd
R709
1MEG
R706
C711
56K
.01uF
R707
5.1K