Alinco DR-140T Service Manual

Service Manual

C O N T E N T S
• S P E C IF IC A T IO N S
1) G e n e ra l................................................................................2
2) T ra n s m itte r................*........................................................ 2
3) R e c e iv e r...............................................................................3
• C IR C U IT D E S C R IP T IO N
1) R e c e iv e r S y te m ......................................................... 4 -5
2) T ra n sm itte r S yste m ....................................................5 -6
3) P LL C ircu it.........................................................................6
4) T erm in al Function of C P U ........................................... 7
• S E M IC O N D U C T O R D A T A
1) AK2341 ............................................................................10
2) A N 7 8 L 0 5 M ................................................................... 11
3) L A 4 4 2 5 A .......................................................................... 11
4) M 5 2 1 8 F P .........................................................................11
5) M 5 6 7 6 0 F P ...................................................................... 12
6) M 6 7 7 4 6 ............................................................................ 13
7) M 68 7 0 2 H ..........................................................................13
6) M 6 8 7 0 2 L ..........................................................................13
9) M C 7 80 8 C T ...................................................................... 14
10) R H 5VL32AA -T1 ............................................................14
11) RH5VL45AA -T1 ............................................................14
12) T K 1 0 9 3 0 V T L ................................................................... 15
13) jczPC2710T...................................................................... 16
1 4 ) 24L C 1 6B
15).T ra n s is to r,D io d e and LED O u tlin e D ra w in g s ....... 17
16) L C D ....................................................................................18
• E X P L O D E D V IE W
1) Bottom V ie w ................................................................... 19
2) LCD A s s e m b ly ............................................................... 20
3) Top, and F ront V ie w .....................................................21
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• PA R TS LIST
Main U n it...................................................................... 2 1 -2 2
P a c k in g ................................................................................. 23
CPU U nit...............................................................................23
S P Unit ................................................ .............................. 23
VC O U n it ............................................................................. 23
M echanical P a r ts .............................................................. 23
EJ-20U .................................................................................24
• A D JU S T M E N T
1) Required T est E q u ip m e nt.......................................... 25
2) P L L A d ju stm e n t.............................................................26
3) T X A d ju s tm e n t......... .................................................... 26
4) RX A d ju stm e nt..............................................................27
5) A dju stm e nt P o in ts........................................................ 28
• PC B O A D VIE W
1) Main U nit S id e A ...........................................................29
2) M ain Unit S ide B ........................................................... 30
3) CPU Unit Side A ..........................................................31
4) CPU U nit S ide B ............................................................31
5) VC O Unit S ide A ...........................................................32
6) VCO Unit S ide B ...........................................................32
7) EJ-20U (CTCSS Unit: O p tio n ).................................. 33
• B L O C K D IA G R A M ................................................................... 34
• S C H E M A TIC D IA G R A M
1) M ain Unit T /E ......................................................... 3 5 -3 6
2) Main U nit T E 1 /T E 2 ...............................................3 7 -3 8
3) CPU U n it............................ ............................................ 39
4) VCO U n it........................................................................ 40
5) EJ-20U (CTCSS Unit: O p tio n )............................... 41