CHAPTER 6
PAGE 50
1. Model number
2. Serial number
3. How long have you owned it?
4. Where did you purchase it (dealer's name}?
5. If purchased used, who was the previous owner? (Used to refer to any previous repair
history on that unit.)
6. What terminal modes, rates, codes, and conditions are associated with the failure?
Does it happen only in receive, transmit, or both?
7. Are there extenuating circumstances? (Lightning, spilled liquids, dropped unit?)
8. Is the problem confined to a particular unit? (CWR6850, keyboard?)
9. Is there anything else you can add to the description that you think might be useful?
AFTER you have determined answers to the above, contact your dealer and discuss the problem
with him. If he indicates that he will be unable to assist you, the unit should be returned to the
HAL factory for repair. Before returning the unit to the factory, either you or the dealer should call
and receive factory return authorization so that we may expect the unit in shipping and be pre-
pared to work on it when it arrives. Whenever possible, return the unit via UPS to the factory ad-
dress below, insuring it for the full value. The shipping cost to the factory should be paid by you;
the return shipping costs from the factory (48 contiguous states only) are paid by HAL (warranty
repairs only). The factory "ship-to" address is:
HAL COMMUNICATIONS CORP.
1201 W. KENYON ROAD
BOX 365
URBANA, ILLINOIS 61801
ATTENTION: REPAIR DEPARTMENT
The one-year limited warranty (listed in full at the end of this manual) provides for repair of the
CWR6850 for a full year after purchase. The purchase invoice date from your dealer marks the be-
ginning of the warranty period - save your copy of the invoice I Please read the warranty carefully
to determine the full extent of the privileges and limitations.
6.4
User Adjustments
Because of the complexity of the circuitry used in the CWR6850, we do NOT recommend that you
personally undertake repairs of the terminal circuit boards. However, there are a number of align-
ment procedures that you may undertake if you have the test equipment available. DO NOT
UNDERTAKE ANY ADJUSTMENTS UNTIL YOU ARE SURE THAT UNDERSTAND THE ENTIRE PROCE-
DURE. If in doubt, don't do it! (Ask your dealer or the factory for help.) The recommended mini-
mum teat equipment is:
1. Audio Frequency Counter - high impedance input, 1 V or better sensitivity, count to 1
MHz or higher.
2. Audio Frequency Oscilloscope - high impedance input, 1 V or better sensitivity, 1 MHz or
greater bandwidth.
3. Volt-Ohm-Milliammeter (VOM) - 20 kΩ/V or higher.
4. Audio Frequency Oscillator - 500 ohm impedance, 10 mV to 1 V rms output, 500 – 3000
Hz adjustable frequency.
Simplified layout drawings are shown in Figure 10 that give the locations of various variable resis-
tors (VR-
n
), test points (TP-
n
), and user jumper locations (JP-
n
). Note that there are numerous ad-
ditional jumper locations on the circuit boards that should not be disturbed from their factory set-
tings.
Summary of Contents for CWR6850
Page 1: ...CWR6850 TELEREADER INSTRUCTION MANUAL QUALITY COMMUNICATIONS EQUIPMENT April 1982 Printing...
Page 6: ...CHAPTER 2 PAGE 6...
Page 35: ...CHAPTER 5 PAGE 35 Figure 4 Connections To The CWR6850...
Page 41: ...CHAPTER 5 PAGE 41 Figure 6 Typical Video Detector Figure 7 Modified Video Detector...
Page 60: ...APPENDIX B PAGE 60 APPENDIX B CWR6850 DISPLAY FORMAT TOTAL DISPLAY CAPABILITY...
Page 61: ...APPENDIX B PAGE 61 PAGE 0 and PAGE 1 DISPLAY FORMAT...
Page 62: ...APPENDIX B PAGE 62 PAGE 2 and PAGE 3 DISPLAY FORMAT...
