Motorola HT1250-LS+ - Clock and Alarm Settings

5-42 Schematic Diagrams, Overlays, and Parts Lists
* Motorola Depot Servicing only
R661 0662057M50 100
R662 0662057N11 33 K
R851 0662057N23 100 K
R852 0662057N23 100 K
R853 0662057N23 100 K
R854 0662057M01 0
R855 0662057N31 220 K
R856 0662057N23 100 K
R859 --- not used
R860 --- not used
R861 --- not used
RT400 0680590Z01 33.0 K @ 25°C
S501 4080710Z02 Frequency Switch
S502 1880619Z02 Volume Potentiometer/On-Off
Switch
SH100 2680507Z01 Shield, PA Bottom
SH101 2686081B04 Shield, PA Harmonic Filter
Bottom
SH102 2680554Z01 Shield, PA Harmonic Filter
Top
SH201 2680511Z01 Shield, FracN Top
SH202 2680511Z01 Shield, FracN Bottom
SH301 2680554Z01 Shield, FE Top
SH303 2680509Z01 Shield, FE/Mixer Bottom
SH304 2680554Z01 Shield, FE Top
SH350 2686081B02 Shield, IF Top
SH351 2686081B03 Shield, IF Bottom
SH400 2680505Z01 Controller Memory Shield
Bottom
SH401 2680506Z01 Controller On/Off Shield
Bottom
SH402 2680515Z01 Controller Micropressor Shield
Top
SH403 2680516Z01 Controller ASFIC/Audio PA
Shield Top
SH600 2680508Z01 Shield, VCO Bottom
SH602 2680508Z01 Shield, VCO Bottom
SH603 2680514Z01 Shield, VCO Top
T301 2580541Z02 Mixer Balun
T302 2580541Z02 Mixer Balun
U101 5185130C65 LDMOS Power Amplifier
U102 5185765B26 Power Control IC
U103 5185963A15 Temperature Sensor
U201 5185963A27 Low Voltage FracN
U202 5105739X05 5V Regulator
U203 5102463J58 3.3V Regulator
U350 5186144B01 SA616 IFIC
U400 5102463J40 3.3V Regulator
U404 5185130C53 ASFIC Audio Filter IC
U405 --- not used
Circuit
Ref
Motorola
Part No.
Description
U406 *5102463J59 Flash ROM 128Kx8
AT49 HLV01 0
U407 *5102463J64 Serial EEPROM 16Kx8
X25128-2.7
U409 5102226J56 Microcontroller
U410 5102463J57 3.3V Regulator
U420 5102463J44 Audio PA
U600 5105750U54 VCO Buffer IC
U851 5113818A01 LMS2904 Dual Opamp
VR101 4813830A15 5.6V Zener
VR432 4805656W08 5.6V Zener
VR433 4805656W08 5.6V Zener
VR434 4802245J73 6.8V Zener
VR445 4802245J74 10V Zener
VR446 4802245J74 10V Zener
VR447 4802245J74 10V Zener
VR448 4802245J74 10V Zener
VR449 4802245J74 10V Zener
VR450 4802245J75 12V Zener
VR460 4802245J73 6.8V Zener
VR501 4813830A18 6.8V Zener
VR502 4880140L17 12V Zener
VR503 4802245J73 6.8V Zener
VR504 4802245J73 6.8V Zener
VR505 4802245J73 6.8V Zener
VR506 4802245J73 6.8V Zener
VR507 4802245J73 6.8V Zener
VR508 4802245J73 6.8V Zener
Y200 4802245J68 16.8 MHz Reference Oscillator
Y350 4880606B10 72.895 MHz 3rd Overtone
Crystal
Y351 9186145B02 455 KHz Discriminator
Circuit
Ref
Motorola
Part No.
Description