PARTS LIST & PRODUCTION CHANGES
PRODUCTION CHANGES
Changes in the equipment to improve performance or to simplify circuits are
identified by a "Revision Letter" which is stamped after the model number of the
unit. The revision stamped on the unit includes all previous revisions. Refer to
the Parts List for the descriptions of parts affected by these revisions.
Rev. A - 19D902494G1, 25 kHz IF Module Board
To improve performance in high temperature environments and to
eliminate Audio Level drifting, changed voltage regulator U8 and vari-
able resistor VR1.
U8 was: 19A704971P11, 8 Vdc; sim to MC78L08ACD.
VR1 was: 19A705496P5 20K ohms 0.1w; sim to Murata RGV4E203.
Rev. B - 19D902494G1, 25 kHz IF Module Board
To change Squelch Driver operation to allow compatibility with GETC,
changed resistors R56, R57, and R69.
R56 was: 19B800607P182 Metal film: 1.8K ohms
±
5%, 1/8 w.
R57 was: 19B800607P822 Metal film: 8.2K ohms
±
5%, 1/8 w.
R69 was: 19B800607P102 Metal film: 1K ohms
±
5%, 1/8 w.
SYMBOL
PART NO.
DESCRIPTION
- - - - - - - - - - -CRYSTALS - - - - - - - - -
Y1
19A149974G7
Filter, crystal: Fc = 21.4 MHz, 3 dB BW =
15.0 kHz. Insertion loss = 2.0 dB max.
Y2
19A149974G8
Filter, crystal: Fc = 21.4 MHz, 3 dB BW =
15.0 kHz. Insertion loss = 3.0 dB max.
Y3
19A702284G5
Quartz crystal unit: 20.945000 MHz
±
10 ppm
@ 25
°
C.
Y4
19A149976P1
Fixed: 455 kHz.
LBI-38643C
8
Содержание 19D902783G1
Страница 6: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G1 19D902504 Sh 1 Rev 6 LBI 38643C 5...
Страница 7: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G1 19D902504 Sh 2 Rev 6 LBI 38643C 6...
Страница 20: ...SCHEMATIC DIAGRAM UHF TRANSMITTER SYNTHESIZER 19D902780G3 G6 G10 19D903363 Sh 1 Rev 10 LBI 38671H 9...
Страница 21: ...SCHEMATIC DIAGRAM UHF TRANSMITTER SYNTHESIZER 19D902780G3 G6 G10 19D903363 Sh 2 Rev 10 LBI 38671H 10...
Страница 22: ...SCHEMATIC DIAGRAM UHF TRANSMITTER SYNTHESIZER 19D902780G3 G6 G10 19D903363 Sh 3 Rev 10 LBI 38671H 11...
Страница 33: ...ASSEMBLY DIAGRAM RECEIVER SYNTHESIZER MODULE 19D902781G3 G7 G8 G10 G12 19D902781 Sh 2 Rev 5 LBI 38672J 10...
Страница 34: ...SCHEMATIC DIAGRAM RECEIVER SYNTHESIZER MODULE 19D902664G3 G7 G8 G10 G12 19D904091 Sh 1 Rev 9A LBI 38672J 11...
Страница 35: ...SCHEMATIC DIAGRAM RECEIVER SYNTHESIZER MODULE 19D902664G3 G7 G8 G10 G12 19D904091 Sh 2 Rev 9A LBI 38672J 12...
Страница 36: ...SCHEMATIC DIAGRAM RECEIVER SYNTHESIZER MODULE 19D902664G3 G7 G8 G10 G12 19D904091 Sh 3 Rev 9A LBI 38672J 13...
Страница 42: ...RECEIVER FRONT END BOARD 19D902490G4 G7 OUTLINE DIAGRAM 19D902490 Sh 4 Rev 6A LBI 38673F 5...
Страница 43: ...ASSEMBLY DIAGRAM RECEIVER FRONT END MODULE 19D902782G3 19D902782 Sh 1 Rev 6 LBI 38673F 6...
Страница 44: ...ASSEMBLY DIAGRAM RECEIVER FRONT END MODULE 19D902782G4 G7 19D902782 Sh 2 Rev 6 LBI 38673F 7...
Страница 45: ...SCHEMATIC DIAGRAM RECEIVER FRONT END MODULE 19D902782G4 G7 19D904768 Sh 1 Rev 6 LBI 38673F 8...
Страница 46: ...SCHEMATIC DIAGRAM RECEIVER FRONT END MODULE 19D902782G3 G4 G7 19D904768 Sh 2 Rev 6 LBI 38673F 9...
Страница 47: ...SCHEMATIC DIAGRAM RECEIVER FRONT END MODULE 19D902782G3 19D903498 Rev 7 LBI 38673F 10...
Страница 48: ...This page intentionally left blank LBI 38673F 11...
Страница 54: ...ASSEMBLY DIAGRAM POWER AMPLIFIER ASSEMBLY 19D902797G3 G6 G7 G8 G9 G10 G11 19D902797 Sh 3 Rev 10 LBI 38674F 5...
Страница 56: ...ASSEMBLY DIAGRAMS LOW PASS FILTER MODULE 19D902856G3 19D902856 Sh 1 Rev 0 LBI 38674F 7...
Страница 60: ...SCHEMATIC DIAGRAM POWER AMPLIFIER ASSEMBLY 19D902797G3 G6 G7 G8 G9 G10 G11 19D903622 Sh 1 Rev 11 LBI 38674F 11...
Страница 71: ...ACCESSORIES ANTENNA SWITCH 19B235897P2 LBI 38675E 9...
Страница 78: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE EARLIER VERSION 19D902494G7 G11 188D5586 Sh 1 Rev 3 LBI 39123E 5...
Страница 79: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE EARLIER VERSION 19D902494G7 G11 188D5586 Sh 2 Rev 3 LBI 39123E 6...
Страница 80: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G7 G11 193D1065 Sh 1 Rev 3 LBI 39123E 7...
Страница 81: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G7 G11 193D1065 Sh 2 Rev 3 LBI 39123E 8...
Страница 82: ...SCHEMATIC DIAGRAM RECEIVER IF MODULE 19D902494G7 G11 193D1065 Sh 3 Rev 3 LBI 39123E 9...
Страница 90: ...ASSEMBLY DIAGRAM RECEIVER FRONT END MODULE 19D902782G6 G8 G12 19D902782 Sh 2 Rev 3 LBI 39129B 5...
Страница 91: ...SCHEMATIC DIAGRAM RECEIVER FRONT END MODULE 19D902782G6 G8 G12 188D5789 Sh 1 Rev 6A LBI 39129B 6...
Страница 92: ...SCHEMATIC DIAGRAM RECEIVER FRONT END MODULE 19D902782G6 G8 G12 188D5789 Sh 2 Rev 6A LBI 39129B 7...
