ТО P 1 -2
5V
C401
- ) l -
" 33 0401
MMBT3904 r
C403
^ 1 -
NU
R402
4.7K
3 Y401
R401
7.9488MHZ
Ч .8М
L40t 1 0402
i
j
33
- p 3.6
10
-C 4 0 4
5V
Г 7
C405
R403
100K
4.Р5И
64
R404
180K
63
CR407
5 V * -
ir
г
(TOP VIEW)
CHANNEL
SELECT
SW401
1 = 2
I_______
NU
40
10K
R407
R408
47K
R409
47K
R410
47K
R411
47K
14
13
12
11
✓
- C 4 5 9 -
M 0 0 0 '
C 4 6 0 -
1000"
-C 4 7 5
4 1000
s
C 4 5 6 -
o . i u "
-C 4 7 4
' 1000
s
C 4 5 4 -
0.1U
-C 4 7 6
M 0 0 0
/•
C 4 7 3 -
1000"
-C 4 5 7
4 0.1U
4
C 4 7 2 -
1000"
-C 4 5 5
'0 .1 U
4
R418
100K
20
R4I9
100K
TP
«
R423
100K
Ч Ж Э Е Т )
U411
5V REG
«SW B+
T J 5
J - C 4 0 6
' T ' .0 1 U
C407
4 f -
XIRQ
IRQ
VDD
VSS
PDt
PDO
PEO
9 7 CR*40I SCI TX
2 N
4 ----^
53
PB7
U401
MC68HC11A8
PBI
PB2
PD4
PD3
PE7
PE6
PE2
PEI
^
r
55 I
VREF LO
MOO B
PA2
MOO A
N.C.=5,6,8,9.24.26,31.
30,42,44.46,48.49.57.58
PA1
PA6
PC3
PC2
P C I
PCO
1,4,25>,33
SCI RX
, CR402
R420 |-------- 1
10K
, n ,
H-------- 1----------
0 1-8 0 7 0 2 4 8 9 ВАТТ FILTER BD
1
i i
1
L . ! J
CR403
Г
I <
. BATTERY MONITOR
L i ! J
C447
- \ ( r
R421
180K
R422
100K
5V (SOURC E)«
. 1SSET
0 .1 U ™ Ï*
—( RESET )
+-L c4 1 8 - L
C419
^
10U
'J '
.018U
U 404
5V REG
Ï.7 J3 .4
У
о
OFF
ON
(P / 0 VOL)
" - L C421
4 0.47U
(SOURCE)’'
r - |-------------
1
1
1
T S —
^ 3 9
Fl
------ 1— lï
1
1
1
1 i T „ , 7 Г
i - L e i
-C2 L2
4A
- C4 i
1 'T4 NU
!>
'3 9
s
: j 9 i ,
1
i
•
-{S C I
BATTERY
y
T t - * -
HCHG +
4 C H G -
* CONNECTION VIA CHASSIS
-Ç SW B + )
4 ... 5V
)
! TCR407
SYNTH LE
PAC LE
SR CLOCK
29
SR DATA
62
LOCK DETECT
CARRIER PETECT
. ALC MONITOR (N U ) R*76
100K _|_
CLOCK
R472
10K
- ( S Y N LE )
4 PAC LE )
10K
R475
J25M V RMS (25K H Z MODEL)
165MV RMS (1 2.5KHZ MODEL)
(N O TE 9 )
--------
"Tc458
I
NU
- (LOCK PET)
{ CSQ O E T)
DATA
5
v
C408
J T - ) ! -
■ i O.tu
52
AFIC ENABLE
33
41
PL/DPL DECODER OUT
27
35
PL CLOCK
32
215MV R US (25K H Z UODEL)
105UV R US (12.5K H Z UODEL)
(N O TE 9 )
VCO MOD
2.SV0C
10ÖK
37
R425
39
220K
R426
-------1-------------
'2.SVDC
169
C 41 5
\ 22
н Н
Ь
- П
4700 =
- ( S O ATTN IN)
C435
н е
0.1U
JfOMV RMS (25KHZ MODEL)
r
i50MV RMS (12.5KHZ MODEL)
(NOTE 11)
- CSQ ATTN P U T )
—(P E T AUDIO)
Ч М О О IN )
N.C,=2.36.37
J - C 4 3 4
0.1U
UNATTN RX OUT
PRE
TX IN
U406A4
C E N TE R -S U C E R -L C416
^ O . I U
п
_
г и
^
р- р
1MSEC
(NOTE 9)
VQX
p e t
EQT
ALERT TONES
Schematic Diagram fo r HLD9675C and HLD9677C
VHF Main Boards
,
146-174 MHz
(sheet2 of2)
PCP
24
П з "
C 4 1 2 t I _ C 4 1 3
1U
/T ' 0.47U
OPTION
TX AUDIO
TX AUDIO
FROM U411 -4
r
5VDC
UNMUTEO
FLAT RX
AUDIO
_______ _________ R492
R493 J - C 4 5 I
330K ^ .015U
C445
R462
470K
Л ?6iT
C424
- \ ( r
R448
240
0409
MMBT3906
R463
47K
45UV RUS
U407
r
\ + I 5-
(NOTE
/ O
^
7F1
t
>
-
■
C425
.039U
| 6 _
№7BX V + ^ ł —
C480
— ^1—
C426
- ) h -
018U
C427
- ) | -
г R449
f 100K
TO U 4 0 I-P IN 54 < -
0408
2 5v MM8T3906
» 4
1
R494
ЮОК
R503
+_Lc452
^ 4 . 7 U
C428
4
f -
L403
■ f
C436
---------------- K
-
VR401 470
-----------------
11.0MV RMS
(N O TE 11)
/
33
0.39
R451
2.2K
J -C 4 8 1
150
R452
180K
~ E
=
0407
MMBT3906
l
©
AUDIO PA
LO=MUTED
Hl^ENABLED
2.2K
C463
ч < —
L404
0.39
CR406
9 “
Г
+— И -
- 4 5V
C429
4700
C430
470
MIC AUDIO
- Hl^M UTED
LO=ENABLED
DE— EMPHASIS AMP
C431
45QMV RMS
(N O TE 9 )
/
R455
---------- 1^--------
R457
.012U
68K
SW B4
2 --------
820K
0.47U
170MV RMS-
(N O TE 9 )
VOLUME
f
PI - KEYPAD/DISPLAY
C442
J5MV RMS (N O TE 10)
0VDC
0.39
/
2 .8 JV R M S /
У (N O TE 10)
L406
'
_ L
c
443
^
1000
3
MK40I
INT MIC
LS401
INT SPKR
160
R P D -9 1 1 0 2 -C
12
6880901Z93-C
August, 1996
