SERVICE AND REPAIR NOTES
SRN-1317
APC - 672, 749
Date: August, 2000
Memo To: SRN Mailing List Deadline: 6-30-01
From: Radio Products Division, Plantation, FL
Subject: HT750 and HT1250 Radio Reset With Remote Microphone Attached
Symptoms:
When transmitting with a standard microphone, part number AAHMN9052 or noise canceling speaker
microphone, part number HMN9053 and the cord is looped near the antenna and the front of the radio, the radio
intermittently resets upon dekey and will act as if it has just been turned on.
.
Potential Problem Radios:
Models Affecte
d: AAH25RDC9AA2AN, AAH25RDC9AA3AN, AAH25RDG9AA4AN,AAH25SDC9AA2AN, AAH25SDC9AA3AN, AAH25SDG9AA4AN, AAH25RDF9AA5AN,
AAH25RDH9AA6AN, AAH25SDF9AA5AN, AAH25SDH9AA6AN, AAH25RDH9DU5AN,
AAH25RDH9DU6AN, AAH25SDH9DU5AN, AAH25SDH9DU6AN
Serial Numbers:
672TYUxxxx through 672TAPxxxx, 672FYUxxxx through 672FAPxxxx749TYUxxxx through 749TAPxxxx, 749FYUxxxx through 749FAPxxxx
Cause:
The reset with RSM on HT750/HT1250 UHF range one and two radios is caused by a ground on the internal
universal flex in the front cover to the controller shield (SH401) on the main board.
Corrective Action:
Place a rubber pad, part number 7585734Z01, on the left side of the controller shield (SH401) so that it is insulated
from the Universal Flex for all HT750/HT1250 UHF Band range one and two radios (shown in figure below).
While performing this procedure, make sure that the butterfly connection of the front cover shield
makes good contact with SH400 on the main board (shown in figure below).
Parts and $20.00 labor is authorized by warranty. Contact your local Motorola Authorized Service Representative to
arrange for this modification.
Agency Approved product should follow the guidelines for repairs and service* For international shipments contact your Motorola Regional Service provider.