King Kx155 Service Manual
. This item is: King KX-155 and KX-165 Install and Operation Manual. We answer questions and will provide many detailed photos.
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SPECIFICATIONS Size: 6.25'W x 2.05'H x 10.16'L Weight: 4.75-5.50 lbs. Depending on version TSO Compliance: RTCA DO-160 Ebv. A1D1/A/KPS/XXXXXXZBAAA Temperature Range: -20 to +55C Altitude: -15,000 to 50,000 feet TSO Compliance (COMM): Transmit: C37b (DO-157, Class 4); Receive: C38b (DO-156, Class C & D) / C38b (DO-156, Class A) 50 kHz selectivity Applicable Documents (COMM): RTCA DO-156, DO-157, DO-160 Duty Cycle (COMM): 10%, 4.5 minutes receive, 0.5 minutes transmit Frequency Tolerance (COMM): 0.0015% to meet DO-156 Class C & D Power Output (COMM): 10 watts minimum Modulation (COMM): 85% modulation capability with 90% limiting, less than 15% distortion at 85% modulation. Audio leveling circuit used. Southeast Aerospace recommends that Service bulletin 1 and 2 be complied with on the KA-120 when the adapter is being installed on a new installation.
Service Bulletin 1 corrects an impedance mismatch between the new generation KX-155 and KX-165 Nav/Comms that utilize surface mount technology. KA-120 with serial number 1845 and above have Service Bulletin 1 incorporated during original manufacturing. The cost to add SB 1 is approximately $200. Service Bulletin 2 corrects a serial tuning bus incompatibility when interfacing the KA-120 with a KX-125 and with new generation KX-155 and KX-165 surface mount units (post Mod 16 units). KA-120 with serial number 2819 and above have Service Bulletin 2 incorporated during original manufacturing. Honeywell does offer warranty credit for any KA-120 S/N 2818 and below that requires this modification. An authorized Honeywell Service Center must perform the modification and submit the warranty claim.
None, they represent the same unit. Original King Radio part numbers were 9 digits. For example, 066-3056-01. During the Bendix and King merger (i.e.
Bendix/King), a new part numbering system was created that converted these 9 digit part numbers to 12 digits. Therefore, 066-3056-01 became 066. Despite this numbering change, units that were originally from the King Radio design still have the 9 digit part number format on the unit dataplate.
The 12 digit format for King units appears to be used for catalog and internal Honeywell purposes only. Therefore, any unit that has a zero in its third to last number (i.e. XXX-XXXX-X0XX) has a 9 digit part number (i.e. XXX-XXXX-XXX) on its dataplate / ID Plate. This does not pertain to the comm selector channel spacing.
With the evolution and growth of airborne travel and the necessity for more usable frequencies in the VHF communications spectrum, the 'channel' spacing became smaller. To avoid interference between channels the bandwidth of the RF stages was decreased from 50khz to 25khz. In doing so, another problem was introduced. If the ground transmitter or the air to air transmitter was not capable of tighter frequency tolerances, it was possible the 25khz RF selectivity would not allow the receive signal to pass and the aircraft crew could miss critical voice communications.
Due to the presence of older, outdated equipment in some countries, some manufacturers (namely Bendix/King and Collins) produced VHF comm radios with the 50khz receiver selectivity. With the recent mandates and technological advancements in Europe and South America, the requirements for the 50khz versions has diminished.
If an operator were to use a 50khz version radio in the position of a 25khz, they would potentially have channel crossover and or an increase in background noise. In January 1989 Bendix/King changed from a nine digit to a twelve digit part numbering system. The new, larger 12 digit numbers allowed for the inclusion of software version into the last two digits of the part number for certain units in which software changed frequently such as EFIS and TCAS processors. Therefore, the two digits immediately preceding the software version indicate the hardware version of the unit. Different software versions imply different operational features and/or interface capabilities and software modifications imply software repairs (bug fixes) to insure proper operation of these features and interfaces. Software version upgrades frequently require hardware modifications to the unit.
Such hardware modifications accompanying software version upgrades do not necessarily change the hardware version of the unit. Yes, however certain features in the A radios will not be available if the original non-A connector is used. The A radios do accommodate a different connector than the original non-A radios as the A radios include additional features. The A radio's bottom connector has a notch in it so that it can accommodate the smaller, original non-A connector.
Bendix King Kx 155 Maintenance Manual
Therefore, when replacing a KX-155 or KX-165 with a KX-155A or KX-165A, most major features will remain the same with the exception of the additional features available when using the A connector. Most significantly, the bezel backlighting feature available on the A radios will not be functional when doing this slide-in replacement using the original non-A connector. Both units utilize the same mounting rack (P/N 047-). The KX-155A is part of the Silver Crown Plus product line which includes a backlit bezel so that the lettering on the faceplate can be seen at night.
Southeast Aerospace exchanges are based on the return of an undamaged, economically repairable core unit with identical part number as the unit shipped to the customer. An 'economically repairable' core is defined as one where the cost to repair/overhaul (or Repair Cap) does not exceed 80% of the original SV/OH exchange price billed. Should the Repair Cap exceed 80%, the customer will be billed the additional amount. In the event this amount exceeds the Outright Price for the unit, the customer would only be billed the difference between the Outright Price and SV/OH Exchange Price with the core returned as-is to the customer. Here is an example of such a transaction: $1000 Exchange Price charged to customer $1000 x.8 = $800 Maximum Allowable core repair charge or Repair Cap $2000 Cost to repair core unit - $800 Less Core repair cap - $1200 Additional billing amount. 2200.00 Total Cost of transaction Please Note: SEA offers exchange on new items as well.
King Kx 155 Maintenance Manual
However, repair cap as indicated above is still based on SV/OH exchange price. Negotiating the exchange price of a unit only limits the allowable repair cap for the core unit.
Southeast Aerospace's exchange transactions are based on the return of economically repairable core unit. Once the core is received and evaluated, the core repair cost incurred by SEA cannot exceed 80% of the original exchange price. That is, it cannot cost SEA more than 80% of the original OH/SV exchange price collected from the customer. Therefore, when and if an SEA exchange price is discounted, there is a risk that additional charges may be assessed once the core is returned and evaluated.
Bendix King Kx 155
For more information, please refer to other Exchange FAQs.