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(TOP VIEW)
R408
R409
CHANNEL
47K
47K
SELECT
SW401
1 =
2
C 4 6 0 -
C 4 5 6 -
s
1000"
o . i u "
-C 4 7 4
- C 4 5 9 -
-C 4 7 5
✓
M 0 0 0 '
4 1000
' 1000
Schematic Diagram fo r HLD9675C and HLD9677C
VHF Main Boards, 146-174 MHz
(sheet2 of2)
12
6880901Z93-C
August, 1996
Ч Ж Э Е Т )
R423
100K
U411
«SW B+
ТО P 1 -2
, CR402
5V REG
R420 | -------- 1
10K
, n ,
5V
T J 5
H -------- 1 ----------
J -C 4 0 6
1
i i
1
' T ' .01U
L. ! J
R418
R4I9
100K
100K
TP
C407
«
4 f -
20
CR403
XIRQ
IRQ
VDD
1,4,25>,33
VSS
9 7 CR*40I SCI TX
2 N 4 ----^
PDt
SCI RX
PDO
53
. BATTERY MONITOR
C401
PEO
- ) l -
. 1SSET
3 Y401
" 33 0401
R401
7.9488MHZ
Ч .8М
MMBT3904 r
C403
L40t 1
0402
^ 1 -
33
- p 3.6
SYNTH LE
PBI
NU
i
j
10
PAC LE
PB2
-C 4 0 4
SR CLOCK
R402
PD4
4.7K
SR DATA
29
PD3
62
LOCK DETECT
PE7
PB7
CARRIER PETECT
PE6
5V
. ALC MONITOR (N U) R*76
PE2
^
r
100K _|_
55 I
R403
PEI
U401
C405
100K
4.Р5И
64
MC68HC11A8
Г 7
R404
180K
63
VREF LO
ir
N.C.=5,6,8,9.24.26,31.
CR407
30,42,44.46,48.49.57.58
г
5 V * -
MOO B
52
AFIC ENABLE
40
I_______
PA2
10K
41
PL/DPL DECODER OUT
NU
PA1
R407
PL CLOCK
35
MOO A
PA6
10ÖK
R425
37
220K
R426
39
R411
R410
47K
47K
-------1 ------------- '2.SVDC
14
PC3
169
13
PC2
12
н Н
P C I
11
PCO
C 4 5 4 -
C 4 7 3 -
C 4 7 2 -
s
4
4
0.1U
1000"
1000"
-C 4 5 7
-C 4 7 6
-C 4 5 5
/ •
4 0.1U
M 0 0 0
'0 .1 U
U406A4
C E N TE R -S U C E R -L C416
п
_ г и
^ р- р
1MSEC
(NOTE 9)
R421
Г
180K
I <
R422
L i ! J
100K
C447
- \ ( r
0 .1 U ™ Ï*
—( RESET )
! TCR407
J25M V RMS (25K H Z MODEL)
165MV RMS (1 2.5KHZ MODEL)
(N O TE 9 ) --------
CLOCK
DATA
5
v
C408
J T - ) ! -
215MV R US (25KHZ UODEL)
■ i O.tu
105UV R US (12.5KHZ UODEL)
(N O TE 9 )
VCO MOD
33
27
32
N.C,=2.36.37
J -C 4 3 4
0.1U
C 41 5
\ 22
UNATTN RX OUT
PCP
PRE
TX IN
Ь - П
4700 =
П з "
24
C 4 1 2 tI_ C 4 1 3
1U
/ T ' 0.47U
^ O . I U
VQX
EQT
p e t
ALERT TONES
OPTION
TX AUDIO
45QMV RMS
TX AUDIO
(N O TE 9 )
/
R455
UNMUTEO
FROM U411 -4
FLAT RX
r
AUDIO
5VDC
PI -
KEYPAD/DISPLAY
OFF
ON
У
о
(P /0 VOL)
U 404
5V REG
" - L C421
5V (SOURCE)«
4 0.47U
+ -L c4 18 - L
C419
Ï.7 J3 .4
'J '
^
10U
.018U
(SOURCE)''
C435
н е
0.1U
JfOMV RMS (25KHZ MODEL)
i50MV RMS (12.5KHZ MODEL)
r
(NOTE 11)
2.SV0C
Л
?6iT
C445
C424
_______ _________ R492
- \ ( r
R493 J -C 4 5 I
R448
240
330K ^
.015U
45UV RUS
U407
r
\ + I 5-
R462
№7BX V + ^ ł —
470K
(NOTE / O
^
7 F 1
>
-
t
0409
MMBT3906
R463
TO U 4 0 I-P IN 54 < -
47K
AUDIO PA
MIC AUDIO
LO=MUTED
- Hl^M UTED
Hl^ENABLED
LO=ENABLED
DE— EMPHASIS AMP
C431
---------- 1^--------
.012U
R457
68K
SW B4
2 --------
0.47U
170MV RMS-
(N O TE 9 )
VOLUME f
820K
J5MV RMS (N O TE 10)
0VDC
01-807 02 48 9 ВАТТ FILTER BD
------ 1 — lï
-{S C I
r -|-------------
BATTERY
T S —
1
1
1
^ 3 9
1
y
1
1
Fl
1 i T „ , 7 Г
4A
i -L e i
- C4 i
HCHG +
-C2 L2
T t - * -
1 'T4 N U
!>
'3 9
s
: j 9 i ,
4 CH G -
1
i
•
* CONNECTION VIA CHASSIS
-Ç SW B + )
4 ... 5V
)
- ( S Y N LE )
4
PAC LE )
R472
10K
- (LOCK PET)
10K
R475
{ CSQ O ET)
"Tc458
I NU
- ( S O ATTN IN)
- CSQ ATTN P U T )
—(P E T AUDIO)
Ч М О О IN )
■ C425
.039U
C436
C480
---------------- K
-
11.0MV RMS
— ^1—
C427
C428
VR401 470
(N O TE 11)
- ) | -
4
f -
■ f
-----------------
| 6 _
/
33
L403
C426
0.39
J -C 4 8 1
- ) h -
150
018U
г R449
L404
R451
f 100K
2.2K
0.39
0408
CR406
9 "
2 5v MM8T3906
Г
R494
ЮОК
» 4
- 4 5V
1
R452
~ E
+— И -
180K
R503
C429
+ _Lc452
4700
^ 4 . 7 U
MK40I
2.2K
=
0407
l ©
INT MIC
C430
3
MMBT3906
470
C463
ч < —
LS401
C442
INT SPKR
160
0.39
/
2 .8 JV R M S /
У
(N O TE 10)
L406
'
_ L
c
443
^
R P D -9 1 1 0 2 -C
1000
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