3. TECHNICAL BRIEF
- 31 -
3.12 Dual Mode Speaker and MIDI IC
(1) Dual Mode Speaker
There is a control signal (SPK_RCV_EN) which is for enabling receiver or speaker
because one dual mode speaker is used for both receiver and speaker. The signal is
produced by AD6525 and controls the analog switch (U201).
The dual mode speaker is placed in the front cover and contacted to PCB.
A. Receiver Operation
The dual mode speaker is driven by VOUTNORP and VOUTNORN of AD6521 through a
analog switch (U201) when it is used for receiver. The gain is controlled by the PGA
in AD6521.
B. Speaker Operation
The dual mode speaker is driven by SPOUT1 and SPOUT2 of YMU759B (U200) through
the analog switch (U201) when it is used for loud speaker.
VA2
0
1
8
0
2
C
p
7
4
2
1
2
C
p
9
3
10
0
K
R2
0
9
SP2
0
1
0
0
2
N
C
1
2
SP2
0
0
VA2
0
0
1
1
2
C
p
9
3
COM1
3
COM2
9
GND
6
4
IN1
8
IN2
NC1
5
7
NC2
2
NO1
0
1
NO2
1
V+
N
E
_
V
C
R
_
K
P
S
2V8_VMEM
C200
U201
NLAS468MR2
39p
C207
39p
C210
39p
R207
RCVN
RCVP
4.7
R206
4.7
Figure 3-18 Circuit Diagram pf Dual Mode Speaker
Содержание G1610
Страница 1: ...Service Manual Model G1610 Service Manual G1610 P N MMBD0045701 Date February 2005 Issue 1 0 ...
Страница 52: ...4 TROUBLE SHOOTING 51 Graph 4 14DCS TX Graph 4 15EGSM TX VC1 VC2 VC1 VC2 VC1 VC2 VC1 VC2 ...
Страница 70: ...5 DISASSEMBLY INSTRUCTION 69 5 DISASSEMBLY INSTRUCTION Figure 5 1 Figure 5 2 ...
Страница 71: ...5 DISASSEMBLY INSTRUCTION 70 Figure 5 3 Figure 5 4 ...
Страница 72: ...5 DISASSEMBLY INSTRUCTION 71 Figure 5 5 ...
Страница 73: ...5 DISASSEMBLY INSTRUCTION 72 Figure 5 6 1 3 2 4 Figure 5 7 1 2 3 ...
Страница 74: ...5 DISASSEMBLY INSTRUCTION 73 Figure 5 8 4 2 3 1 2 1 Figure 5 9 ...
Страница 75: ...5 DISASSEMBLY INSTRUCTION 74 Figure 5 10 ...
Страница 82: ...6 DOWNLOAD AND CALIBRATION 81 11 Wait until Sending Block is completed 1 Wait Until Sending Block is completed ...
Страница 86: ...7 BLOCK DIAGRAM 85 7 BLOCK DIAGRAM Power supply ...
Страница 87: ... 86 ...
Страница 101: ...11 STAND ALONE TEST 100 11 2 Standalone Test Equipment Setup GSM Test Equipment Power Supply RS 232 Cable PC JIG Phone ...
Страница 108: ...12 AUTO CALIBRATION 107 12 3 Equipment Setup Figure 12 1 Equipment Setup ...
Страница 111: ...12 AUTO CALIBRATION 110 ...
Страница 113: ...13 EXPLODED VIEW REPLACEMENT PART LIST 112 ...