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COMMERCIAL GOVERNMENT & INDUSTRIAL SOLUTIONS SECTOR PSB # 922
1301 E. ALGONQUIN RD.
SCHAUMBURG, IL..."

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COMMERCIAL GOVERNMENT & INDUSTRIAL SOLUTIONS SECTOR PSB # 922 1301
E. ALGONQUIN RD.  SCHAUMBURG, IL. 60196 (847) 576-0180
APC # 148, 218, 225, 243, 301,   360, 409, 448, 482,
509,   537, 590, 675, 676, 677,  680,
743,  
DATE: FEBRUARY, 2000 EXPIRES: N/A 
SUBJECT: QUANTAR/QUANTRO MAY NOT RECOVER UPON POWER INTERRUPTION OR POWER
LOSS MODELS AFFECTED:       
QUANTAR / QUANTRO
(T5365A)                                                
QUANTAR SATELITTE RECEIVERS
(T5367A)                                                 
ASTRO-TAC RECEIVERS
(T5589A)                                                
ASTRO-TAC COMPARATORS (T5770A) SYSTEMS AFFECTED: ANY SYSTEM
CONTAINING QUANTAR/QUANTRO STATIONS WITH EPIC STATION CONTROL
MODULES.  STATION CONTROL MODULES
AFFECTED:  CLN6686A, CLN6873A, CLN6960A, CLN6961A, TTN4093A-D,
TTN4094A-D, TRN7900A-C SYMPTOM: Upon power interruption the
station may not recover and the Fail LED on the front of the Control Board will
be on.  CAUSE: Power loss or power interruptions as described
below may cause the above symptom. Please note this problem will not occur in
stations with emergency back up systems such as battery revert. 1) A
momentary power loss that induces a power reset but does not fully discharge the
power supply for a sufficient length of time (approximately 5 seconds) could
cause the above symptom. 2) Stations that are powered off for a sufficient
length of time (minute or more) but connected to externally powered peripherals
may also prevent a complete discharge of the power supply. A good example of
this would be an external high stability 5 Mhz reference. In either case
these scenarios may not allow the PLL internal to the Host Microprocessor on the
board to start properly from a known state upon resetting. It may not be
possible to determine for certain if the cause of the lock-up is due to the
microprocessor state or some other influence such as invalid code plug version,
or firmware incompatibility. This particular problem will not be widespread.
However, isolated instances may occur. RESOLUTION: To assure that
the PLL will start reliably it is recommended a jumper wire be added to the Host
Microprocessor (reference designator U401). A bottom side view, (solder side of
the Host Microprocessor U401) is included to aid in identifying the placement of
the jumper wire to be added. Looking at the bottom side of the Control Board,
orient the Control Board so that you can reference A1 to your lower left. In the
following drawing notice the pin identification rows and columns references (
row A -T, columns 1-18 ).  Add the jumper wire from ResetH ( row M -
column 18 ) to TRST ( row L - column 16 ). This will assure that TRST is
asserted during reset, also insuring the internal logic of the Host
microprocessor is restored to a known state upon reset.
 <IMG
height=596 src="" width=560 v:shapes="_x0000_i1025">
NOTE: If further assistance is required, contact the System Support
Center at 1-800-221-7144 and make reference to the bulletin
number. This PSB is for informational Purposes Only. No Special
Reference to Warranty is implied or Intended. </BODY></HTML>

Product Support Bulletin 922 - Revision history

Bryan: Created page with " Category:Quantar Service Bulletin COMMERCIAL GOVERNMENT & INDUSTRIAL SOLUTIONS SECTOR PSB # 9221301 E. ALGONQUIN RD. SCHAUMBURG, IL..."

Bryan: Created page with " Category:Quantar Service Bulletin
COMMERCIAL GOVERNMENT & INDUSTRIAL SOLUTIONS SECTOR PSB # 922
1301 E. ALGONQUIN RD.
SCHAUMBURG, IL..."