Duo-I Plus System Clocks - Boston duo-i plus Service Manual

1 2
A
U18
1 8
GND VCC
2 7
TRIGGER DISCH
GND_DIGITAL
3 6
OUTPUT THRESH
4 5
RESET_5V RESET CONTROL
LMC555CM
R99 365
GND_DIGITAL
FB28
C151 1K OHM
100nF, 50V
GND_DIGITAL
1 3 R100 49.9, 1%
CLK QA
4 R101 249
QB
2 5
CLR QC
6 T3
QD
U17A
M74HC393RM13TR
B
GND_DIGITAL
GND_DIGITAL
P3V3 P3V3_OSC
FB30 R5 T7
1K OHM
3R3, 1%
C10 C11 C194
+ +
C12 C13
330pF, 25V
22uF, 10V 1000pF, 25V 22uF, 10V 1000pF, 25V
GND_DSP
FB31 1K OHM
P3V3
P3V3_OSC_32k
R107 T6
GND_DSP
3R3, 1%
C156
C +
C157
22uF, 10V 1000pF, 25V
GND_DIGITAL
D
1 2
3
T1 P5VOut
FB27
C147 1K OHM
100nF, 50V
Control f = 1/(1.4 R*C)
C1 = 1 C2 = 1 432kHz
C1 = 0 C2 = 1 475kHz
GND_DIGITAL R115 45.3k C1 = 1 C2 = 0 509kHz
C1 = 0 C2 = 0 573kHz
T5
GND_DIGITAL
C149
470pF, 50V
C148
1nF, 16V
Q7
3 BSS138
C1
GND_DIGITAL
P5VOut
T4
FB42
SYNC
1K OHM
SYNC1
T2
D11
3.6V
P3V3_OSC P3V3_OSC
OSC1
1 3
EN OUT 12_288
2 4
GND VCC
12.288 MHz
*** Special Layout ***
P3V3_OSC
Bypass capacitor for
Oscillator
C9
10nF, 10V
GND_DSP
3
4 5
P3V3_OSC_32k P3V3_OSC_32k
OSC2 T8 T31
1 3 R108 49.9, 1%
EN OUT 32768
2 4
GND VCC
32.768kHz
*** Special Layout ***
P3V3_OSC_32k
Bypass capacitor for
Oscillator
C158
GND_DIGITAL
10nF, 10V
GND_DIGITAL

Duo-i Plus System Clocks

4 5
6 7
Title
Size
Date:
File:
6 7
8
13 11
CLK QA
10
QB
12 9
CLR QC
8
QD
U17B
M74HC393RM13TR
A
GND_DIGITAL
B
C
D
Integrated Products Division
300 Jubilee Drive
Peabody, MA 01960 USA
978.538.5000 FAX: 978.538.6226
Duo-I+
Number Revision
D Clocks 3.0
9/10/2009 Time: 11:00:57 PM Drawn By: GlennR Sheet 4 of 9
C:\BostonAcoustics\ClockRadio\Duo-I Plus\Hardware\Clocks.SchDoc
8