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PWR-DSP3
Manual de usuario
DSP PWR-DSP3 Manual de usuario Pagina 2
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Introduction
3
This seminar manual will be
4
Topics we will cover
6
Disassembly
7
To start…
8
There are 3 different types !
10
Correct place for screw with
11
DSP boards removed
13
Digital Signal Processing
14
DSP assemblies
15
DSP ASSY
16
DSP3 ASSY
17
DAC10 ASSY
18
No illumination, no audio!
19
Indicators must illuminate
19
For your reference only
20
DSP Audio Block Diagram
21
DSP Audio Circuit
22
DSP Audio Circuit…continued
23
IC112 DIR & DIT
28
Pin 3 In
28
More noise than signal
29
Pin 3 DIR & DIT In
29
Test point DIR&DIT Pin 25
30
Pin 3 Selector In
32
Test point IC112 Pin 3
33
Pin 4 Out
34
Test Point
35
Test point DSP1 IC301 Pin 6
36
Test point DSP1 IC301 Pin 12
38
Test point DSP2 IC401 Pin 11
40
Question…
41
Answer
41
DSP2 IC401 Pin 5 Out
43
DSP3 IC501 Pin 6 In
45
DSP3 IC501 Pin 12 Out
47
DAC10 CN6002 Pin 11 In
49
DAC10 CN6004 Pin 10 Out
50
DSP Audio Flow Path
53
Continued DSP Path
54
DSP Socket Issues
55
DSP troubleshooting tips
56
Amplifier
58
Protection Circuit
58
Unit shuts off…
60
Can there be other causes?
61
How to check for DC Offset
62
How do I know which of
63
DC Offset
64
Possibly shorted!
65
Last place to look!
66
Amplifier Failures
68
System Microprocessor
71
Standby Voltage On/Off
72
Expander IC
73
RAC1 & RAC2
74
To turn on AC Relays
74
Tip…Look for change of state
74
Data and control lines
74
Mute…Main and Multi-Room
75
Display Microprocessor
76
Turn on procedure
77
Communication between Micros
78
Volume up and down
79
Volume down
80
Changing inputs
81
Things to keep
83
To aid in Troubleshooting
84
Normal Condition
85
Note to current draw…
86
Power supply voltages
88
One brief note on ESD
93
5S ESD Training
93
Additional resources for
94
ESD information…
94
Thank you
95
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