SERVICE AND REPAIR NOTES
Bulletin
TECHNICAL INFORMATION / 8000 W. SUNRISE BLVD. / FT. LAUDERDALE, FL 33322

SRN - 1329

APC -672,749

Date: November, 2000

Memo To: SRN Mailing List Deadline:

From: Radio Products Division, Plantation, FL

Subject: HT750 and HT1250 RF Adapter, Part Number HLN9756A Contacting Tips

Symptoms:

The HT750/HT1250 RF adapter part number HLN9756A was manufactured with either a rhombic or cylindrical tip.

When the rhombic tip RF adapter is inserted into the newer HT750/HT1250 antenna ferrule, it will deform the contacts and

cause intermittent contact. When the cylindrical tip RF adapter is inserted into the older HT750/HT1250 antenna ferrule, it

will give erroneous power and sensitivity measurements, as its diameter is insufficient to fully open the RF connection. This

will result in placing the radios 50-ohm test point in parallel with the antenna match.

Potential Problem Radios:

All HT750/HT1250 portables using the incorrect adapter tip.

Models Affected: AAH25BEC9AA3AN, AAH25CEC9AA3AN, AAH25KDC9AA2AN, AAH25KDC9AA3AN,

AAH25KDG9AA4AN, AAH25RDC9AA2AN, AAH25RDC9AA3AN, AAH25RDG9AA4AN, AAH25SDC9AA2AN,

AAH25SDC9AA3AN, AAH25SDG9AA4AN, AAH25BEF9AA5AN, AAH25CEF9AA5AN, AAH25KDF9AA5AN,

AAH25KDH9AA6AN, AAH25RDF9AA5AN, AAH25RDH9AA6AN, AAH25SDF9AA5AN, AAH25SDH9AA6AN,

AAH25RDH9DU5AN, AAH25RDH9DU6AN, AAH25SDH9DU5AN, AAH25SDH9DU6AN

Serial Numbers: See below

Cause:

The dimension of the rhombic tip is not compatible to the newer radio antenna ferrule. The cylindrical tip dimension is not

compatible with the older radio antenna ferrule.

Corrective Action:

There are two new RF adapters currently available. To avoid confusion these adapters also have different colored elastomeric

tubing added to the housing to differentiate between the two. The details of the adapters are as follows:

Rhombic tip adapter: 5885704M01 (kit) Yellow

Cylindrical tip adapter: 5885705M01 (kit) Blue

Serial numbers: 672TYUxxxx through 672TZUxxxx use 5885704M01 (Yellow)

672TZVxxxx forward use 5885705M01 (Blue)

749TYUxxxx through 749TZUxxxx use 5885704M01 (Yellow)

749TZVxxxx forward use 5885705M01 (Blue)

672FYUxxxx through 672FABxxxx use 5885704M01 (Yellow)

672FACxxxx forward use 5885705M01 (Blue)

749FYUxxxx through 749FABxxxx use 5885704M01 (Yellow)

749FACxxxx forward use 5885705M01 (Blue)

No labor Warranty is intended or implied.

* For international shipments contact your Motorola Regional Service provider