Figure 7-25. Hud4022A/Hud4025B Receiver Front-End Schematic (Sheet 1 Of 2) - Motorola ASTRO Digital XTL 5000 Detailed Service Manual

Schematics, Component Location Diagrams, and Parts Lists: HUD4022A/HUD4025B (VHF) Main Board
C3287
36.p
B(,1),A(,1)
L3263
38.13n
6881096C74-B
L3262
R3288
270nH
62.
C3254
B(,1),A(,1) B(,1),A(,1)
470.p
R3268
62.
R3264
C3253
1.K
470.p
Sector RLS Lib
B(,1),A(,1)
B(,1),A(,1)
R3261
C3271
4.7K
10.n
Sector RLS Lib
C3274
100.n
C3292 C3293 L3271 C3286
1.n 1.n 38.13n
1.n
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1) B(,1),A(,1)
C3295
C3310
62.0p
24.p
B(,1),A(,1)
D3257
C3298
L3264 62.0p
NP
38.13n
Q3253
C3251 C3275
470.p 100.n
Millennium VHF Rx FE
B(,1),A(,1)
R3262 C3252
L3259
3.3K 470.p
1.2u
B(,1),A(,1)
Sector RLS Lib
C3268 R3263
100.n 1.5K
B(,1),A(,1)
B(,1),A(,1)
B(,1),A(,1)
C3269 R3251 C3283
1.n 10.0
1.n
B(,1),A(,1)
Q3252
B(,1),A(,1)
R3267
75.
NP
B(,1),A(,1)
R3252 L3267
12.10 3.3n
NP
SH3763 SH3762
SHIELD SHIELD
1 1
MIXER
2nd Preselector (Elliptic Filter)
L3265
27n
L3252 L3253
47n 100.0n
C3296
22.0p
B(,1),A(,1) B(,1),A(,1) B(,1),A(,1)
C3311 C3279
10.p 18.p
C3290 L3251
51.p 18.0n
L3254
C3277
10.000n
91.p
0 B(,1),A(,0)
T3301
XFMR
6 1 B(,1),A(,1)
MIXER_IF_OUT
2
B(,1),A(,1)
4 3
B(,1),A(,1)
D3258
IO4 IO3
T3302
XFMR
6 1
2
4 3
B(,1),A(,1)

Figure 7-25. HUD4022A/HUD4025B Receiver Front-End Schematic (Sheet 1 of 2)

7-27
IF6250
9.3V_TO_IF
SH3761 SH3760
SHIELD SHIELD
1 1
L3256
56.n
B(,1),A(,1) B(,1),A(,0)
0
L3258 C3297
150.0n 7.5p
B(,1),A(,1)
C3278 L3257
C3291
75.p 15.0n
39.p
IF_OUT_IF
IF6256
B(,1),A(,1)
C3421
4.3p
L3404
330n
R3270
51.
B(,1),A(,1)
L3255 C3258
22n
100.000p
LO_IN
IF6254
73D02970C73-O
SHEET 16 OF 23
May 25, 2005