Maintenance
MT930B
Service Manual
Page 6-49
7. Set the LNB to 18 V, connect a load with a current flow of 800 mA or more,
and check that the protection circuit activates and that output is shut off.
8. Remove the load used in step 7, and return the LNB to 0 V. Then check that
output appears when the LNB is set to 13 V and 18 V.
Factory Default Settings Check
Check Procedure:
1. Turn power on while pressing the EDIT and SAVE pushbuttons. Settings will
display on the front panel LCD automatically when the pushbuttons are re-
leased after the RF Port #1 and #2 LEDs light.
The settings shown in this operation are as follows:
•
1st Format in database
•
1st Transponder in that format
•
LNB power = OFF
•
Video clamp = Sync Tip
•
Interface = RS-232
•
Contrast = 20
•
Time = 240000
•
Date = 010100
•
BAUD rate = 19200
•
Alarm relay = OFF
•
Alarm signal = –45 dB
•
Alarm C/N = 10 dB
•
Alarm video = OFF
•
Alarm AFC = OFF
•
Alarm LNB = OFF
•
Alarm AUX IN = OFF
•
Timer displayed = 0
•
Timer MODE = OFF
•
Timer date = 0101
•
Timer time = 0000
•
Timer days = all OFF
•
Timer relay = OFF
•
Timer Format = NONE
•
Relay 1 = NORMAL
•
Relay 2 = NORMAL
•
Relay hold time = 60 seconds
•
Relay delay time = 0 seconds
•
Timer hold time = 5 seconds
•
Receiver address = 0000
Summary of Contents for mt930b
Page 3: ...MT930B Service Manual Page i ...
Page 10: ...General Information Page 1 4 Service Manual MT930B THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 22: ...Controls and Connections Page 3 4 Service Manual MT930B THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 86: ...Options Maintenance Page 7 2 Service Manual MT930B THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 90: ...Drawings Page 9 2 Service Manual MT930B 10264 Figure 9 1 MT930B Block Diagram 1 ...
Page 91: ...Drawings MT930B Service Manual Page 9 3 10265 Figure 9 2 MT930B Block Diagram 2 ...
Page 92: ...Drawings Page 9 4 Service Manual MT930B 10266 Figure 9 3 MT930B Block Diagram 3 ...
Page 93: ...Drawings MT930B Service Manual Page 9 5 10267 Figure 9 4 MT930B Block Diagram 4 ...
Page 94: ...Drawings Page 9 6 Service Manual MT930B 10268 Figure 9 5 MT930B Head Phone Schematic ...
Page 95: ...Drawings MT930B Service Manual Page 9 7 10269 Figure 9 6 MT930B RF PC Board Schematic ...
Page 96: ...Drawings Page 9 8 Service Manual MT930B 10270 Figure 9 7 MT930B Converter Module Schematic ...
Page 97: ...Drawings MT930B Service Manual Page 9 9 10271 Figure 9 8 MT930B Main PC Board Sheet 1 of 3 ...
Page 98: ...Drawings Page 9 10 Service Manual MT930B Figure 9 9 MT930B Main PC Board Sheet 2 of 3 ...
Page 99: ...Drawings MT930B Service Manual Page 9 11 10273 Figure 9 10 MT930B Main PC Board Sheet 3 of 3 ...
Page 100: ...Drawings Page 9 12 Service Manual MT930B 10274 Figure 9 11 MT930B Power Supply Schematic ...
Page 101: ...Drawings MT930B Service Manual Page 9 13 10275 Figure 9 12 MT930B IF Filter Block Schematic ...
Page 102: ...Drawings Page9 14 Service Manual MT930B 10276 Figure 9 13 MT930B Audio IF PB01 Schematic ...
Page 103: ...Drawings MT930B Service Manual Page 9 15 10277 Figure 9 14 MT930B Audio Out Schematic ...