Welch Allyn Grason-Stadler GSI 17 Series - Page 4

SECTION
4 - CALIBRATION
4.1
Quick Reference Calibration ..........
Figure 4-l:
Quick Reference Calibration Control; : :
Figure 4-2:
Access to Calibration Controls
....
Table 4-l:
Calibration Reference Threshold;
....
Calibration Mode Operation
Cal/Normal Switch
...........................
1
..
Calibration Mode Dip Switches ............
Calibration Mode Entry
...............
Mode Initialization
Earphone SPL Calibration Mode
............................
Tone Type Switch
..................
Routing Switch
Frequency Selector'
..................................
Present Bar
.....................
HLl
. ...
Extended Range Pushbution
................................
Response Switch
...................
HLDisplay
.....................
Response LED
....................
Stimulus ON
.....................
Low Battery Segment
.................
"+" LCD Segment
...................
Calibration Mode Exit
................
Calibration Data Storage and Validation
.......
Calibration Mode Dip Switch .............
Dip Switch S4
....................
Dip Switch S3
....................
Dip Switch S2
....................
Dip Switch S1
....................
Selection of the Diagnostic Mode ..........
Hardware Diagnostic Test (DO) ............
Pushbutton Diagnostic Test (D1) ...........
Display Diagnostic Test (D2)
A/D Converter Diagnostic Test (D3) 1 : : 1 : 1 1 : :
Attenuator Maximum Output Level Calibration (D4) .
..
4.2
4.2.1
4.2.2
4.3
4.4
4.5
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
4.5.6
4.5.7
4.5.8
4.5.9
4.5.10
4.5.11
4.5.12
4.6
4.7
4.8
4.8.1
4.8.2
4.8.3
4.8.4
4.9
4.9.1
4.9.2
4.9.3
4.9.4
4.9.5
SECTION 5
- DISASSEMBLY
5.1
5.2
5.3
Figure 5-l:
Disassembly
..............
Disassembly Instructions
..............
Parts Numbers
....................
Accessories and Replacement Parts ..........
SECTION 6
- TROUBLESHOOTING
6.1
Troubleshooting Using the Hardware
Diagnostic Mode (DO)
............
Figure 6-l:
Diagnostic Mode Controls and
Functions
.
Output Related Troubleshooting Symptoms
..................
Figure 6-2: Block Diagram of Amplifier
Signal Flow
...
Left or Right Amplifier Troubleshooting Symptoms'
.......
6.2
6.3
16
17
18
19
19
19
19
20
21
21
21
2";
22
22
22
23
23
23
23
23
23
24
24
25
25
25
27
27
28
29
31
33
34
38
42
:3
44
45
46
48
48
49
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