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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.
Figure 3-18. Circuit Diagram of Dual Mode Speaker.
3. TECHNICAL BRIEF
39p
C207
39p
C200
C212
39p
VA200
R234
0
4.7
R207
0
R236
VA201
5
7
NC2
2
NO1
10
NO2
1
V+
NLAS4684MR2
U201
COM1
3
COM2
9
GND
6
4
IN1
8
IN2
NC1
CN200
1
2
R206
4.7
R209
100K
39p
C210
SP201
C208
47p
SP200
C211
39p
RCVP
RCVN
SPK_RCV_EN
Содержание C3100
Страница 1: ...Service Manual Model C3100 Service Manual C3100 P N MMBD0033001 Date June 2004 Issue 1 0 ...
Страница 51: ...Graph 4 15 EGSM TX 50 VCX VC2 VCX VC2 4 TROUBLE SHOOTING Graph 4 14 DCS TX ...
Страница 67: ...5 DISASSEMBLY INSTRUCTION Figure 5 1 Figure 5 2 66 5 DISASSEMBLY INSTRUCTION ...
Страница 68: ... 67 5 DISASSEMBLY INSTRUCTION Figure 5 3 Figure 5 4 ...
Страница 69: ... 68 Figure 5 5 5 DISASSEMBLY INSTRUCTION ...
Страница 70: ... 69 5 DISASSEMBLY INSTRUCTION Figure 5 6 Figure 5 7 1 3 2 4 1 2 3 ...
Страница 71: ... 70 Figure 5 8 Figure 5 9 5 DISASSEMBLY INSTRUCTION 4 2 3 1 2 1 ...
Страница 72: ... 71 5 DISASSEMBLY INSTRUCTION Figure 5 10 ...
Страница 83: ... 82 7 BLOCK DIAGRAM 7 BLOCK DIAGRAM Power supply ...
Страница 90: ... 89 9 PCB LAYOUT 9 PCB LAYOUT ...
Страница 91: ... 90 9 PCB LAYOUT ...
Страница 98: ... 97 11 3 HW Test Software for Standalone Test Setup 11 STAND ALONE TEST ...
Страница 100: ... 99 Tx Stand alone Test Setting 11 STAND ALONE TEST ...
Страница 102: ... 101 Rx Stand alone Test Setting 11 STAND ALONE TEST ...
Страница 104: ... 103 12 3 Equipment Setup Figure 12 1 Equipment Setup 12 AUTO CALIBRATION ...
Страница 107: ... 106 12 AUTO CALIBRATION ...
Страница 108: ... 107 13 EXPLODED VIEW REPLACEMENT PART LIST 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...
Страница 109: ... 108 13 EXPLODED VIEW REPLACEMENT PART LIST ...