Wireless Intercom System Service Manual
NOTE:
COMPONENTS
IN
DASH
BORDER AREAS ARE LOCATED ON
THE DISPLAY BOARD.
r-t-I
I
_I
I
-I
L
__
.J
Example
RECEIVE
BOARD
J113
Cl04
.1UF
R222
lK
r-
---I
I
DBOl
I
I ~ I
I
~~E~.1
REMOTE
5111
orr
~
CONT
HEADSET
SPfAI<ER
R1B5
3.61<
R209
16.9K
o;~
'"
i
INTERCOM
,..
1
OVERLOAD
_
-I
INDICATOR
F101
POWER
'~N:~'
1~::'
lAm.
=Vcif~,
~
r"N'--.------___.--,
510.
-+
---.....--.--,--<1'
~
01O~¥'~1
~C180
'
~C179
R206 8
TlPJO
R207 I .1UF r 2200UF
16.2K
n
~_L..;l...LI::
;;.:rU;;-l1t'~--j'lt--!-----J
~
I 1
~~~64
1
~~gg4
't
·"'1
LM35B
1~'20.
L-------.-1,C~,7B7,------J
Z~01~
r·01~
1N4733
7
r-
I
I
C191
1
.D01UF
L_
R190
'OK
"
J;C161
I
'u
,
T
R165
100K
~~:
~
~~9
IC155
C152 + T 4.7UF
1UF
:+
R181
51
I
R1,~
4,OK
R187
47K
'}
~
•
U109:A
C132
J!~
It
R16
'
--LI:
>-"--
LM3.2
1UF
r
1M
+
V"1
R187
I +
'="
R191
_
6.8K
C185 I C154 I
620
'1
10UF
I
10UF
T _ "7
"f
T
C141
J!
470UFI
T
R160 C1J1 0102
10K
lUF lN4146
,
l~~~;Bt
R169
10K
R170
Ul10:A
0150
10K
?
"NESS32
R171
!~
-"
330
R168
Q
6BK
10K
'
AUX
OUT
I~R173
C151 7"
o 10K
R174
- 7
330
lR~F
T
+
U110:B
NE55J2
INTERCOM
GAlN
R162
9.1K
EXTERNAL
SPfAI<ER
VOLUME
CAl01
~
(
\\
VR103
+-
-J+--"~OOK
C144
:$.
.1UF
A 1
~
C143
EXTERNAL
l~
~+-""""'"
3
?:~
220U,
SPfAI<ER
_
+~J106
C;45T
- 6
,lR162
C142 I
100UQ
U106 R183 1 470UF '1
'T
LM2895
T
181<
+
C14B
h ,
I
J!C156
1-----1f-"
l'W'
I'70U'
R184
01
1
47
~
200 JJOPF Ul11
~~CJ4119
C140 I
rl>-.-I!!-,
Rl.3
Pl,.
!
..
?UF
311
13;".J
1
lLII,,'°;e-_-<
"
J~
5J
r
R"',".!'2--'--<
2~
10
I +16153100PF
T
R179
R180
22K
'OOK
C13B
!!
lU'I
T
HEADSET
SPEAKER
VOLUME
~C14B
r---
-I
C136
R17B
1
10ur
1 \!R60J 1
.1~F
1M
ot
r-.
6~~glj~
T
I
lOOK
~+IF-~>:cU~7'
__
_J
I I C137 - C13.1
L_ _ _
_I
220PFI
220PF!
T+--'\i¥-----l
TRANSMIT
AUDIO
lEVEL
~~~3
'rdk3i
J112
,---------------"IV'--I,-
~~-.\.\-~~11-T
,"'1\,
,_,,-+IB-N,.,(h,
.'1
~
TRANSMIT
+-1-
-j~
__
-'L.j,,//>-7L~
1--------------------_1_-1-1--<
BOARD
U1'66:8
NE5532
R121~
10K
f
NE~53r-:
Is
C114~
R124
---:-1:~
10UF
I
13K
rv-
T
R120
4.31<
Figure 24
Schematic Diagram Audio
Board
Version 2
R150
lK
R133
+
BBK
R151
lK
C1SB
R223
R152
.01BUF
2'0
3K
R131
BBK
PORTABLE
4
0177
SELECT
e178
"1~::~~:.r'0u'
1OOK1'OOK
"'f
"f
Q111
MPSJ704
R220
5.1K
U113:0
n~575
~
PORTABLE
2
U112:0 G173
SELECT
0174
on
/£575
•.,
l~UF
Sl~
lOUr
I
rwV
lR7.~Rl
••
rlL-Jvv'-----.l
1OOKl'OOK
'i 'i
R221
10K
R219
1.SK
I'
0.0.1
T I
~
I
i
TAU<:
I I
L"':
__
-I
R217
10K
0110
1N41'!9
~
C170 +
lU'I
T
C103
.OO22Ur
'-..:.:/
R153 r
v.-;O~
'OK
100~:
?
r::-
L
__
J
+-1-+----\-------\---"--
'j'+/1
Ul06:A
R144 R'2B R125 ,
..
+.
.....
;;·2;,;
..
'
;lANCE
':~~'
~~f
$NE5532
Ul0J:A 3.9K 10K
,,31/91/'K
-t-H
:
INTERCOM:
VR101
'-1
r
"',2'-9-'0-0-P,'
N;~2
B R140 Rl41 I U103,B C122
t--'W'---t
C115"
:
OUTPUT
il.
.....
:~.~.
R12J
_2J:".:::
1
1M
10K A _
NE'::5>53...:2.4.i·,I.~uf·'_"VIr---J_.z._P"'_
~~Jg;5'2
100PF
~I
r---.
B \
~~~
~EVEL
~.~j~~\
R155 R159
C1JJ
2.2K
~,C116
.fJ~.:~
~
4
1
/
C135
R12.
~"'-
1 -
__
Lj~_~'50K
~~~B
lOU'
47PF R1J5 4
82K
+ R126
---.5.J,,-";
fl238
~1
C125:
C127l='=~
MlQ..GAltt
R142
1'°1~F
4
~
~:8
:
1K
1UF:
1DOPF
+
U107:A
Cl17
IvRPQ~'
5BO
010'
T
nr-
I
~!~7
'
R23.
, • NE5532
22UF:~
1~lQQ!S...J
~~1~3
22K
J177
~1~6
~1~5:~.~~~3
I
:~~
NE5532
!..
.~~.~!
~
~~g~
~
.~~~4
~1~8
5104:9
~C'-\1i"lB'lI".0'"'U~r.VY'..,R137
Q °
0107
)..;-\v-r
" " r
IV'
R134
~
~\~~
4.7M
MPS~7~2
MPSJ702~
II
C130
T101
S~4:2
S.!24:4
10K
~
R156 100PF
r---'
-(r"
I-(r"
0105
R13~
ll!I'
C121
150K
R17B
!
5'2"3
[
522"5
5~
1,I
CC1
"ci\u,
I
J177
47K
T
1UF
+C128
1M
Ip-~·o-
....
-
........
1 C203
='
I
·
1U
'
,,6
:
11~
,
C120 + R1J9 R175
5~4:7
S~~OO~
~---'-0-~~rt,~7~lM---~-
__
~--~~~1A~U!:~:~LE!:~--~-R-,.-7
--.-~~==~=~==~----------~.~m~1--:;~~~7---~-~7,~~:~~~'
~~~3
~
lBOK
.o;~~J
1/
...-
--'I
1,C157
C101
R101
II
Rl'i:-----
---
--
~-\
'~i~~M
5104:1
I·001UF
2.~~,
B2K
1
Rl0'
3
.•
K 1 -
~-1-W-"-'M~'2K
UlO',B , 7 7 7
AUJ~~~
3 ?
'"
~~~:
:
101:A'
':
8">NE-'5,'-5-3
..
2
-j
__
+-
_
_I_.J~V'.\V'~2-I+<~iLl"-::--
U,;~~2
~~~~ ~~L1~
Cl;;'
Rl03
RI05
tESS3
~:;,
~;3~:~
+
=,">--'4
:,7~1~,~~~-HI---I--r--+-_------jf-_---J1
--..
~""
2.2UI'"
82K
2.2K
AUX
GAIN
Rl06
1
0808
0607
1 ..J:.
r
+ C193
I'
L
----4
I-VA"''''';:-
..
,
3.9K
R113 , I
~
~
I
'U,
'1"lP'/¥"
22K
R117 R116
R,2
7
0
0
6
..'
"f "f
Rl07
1-'[001-1
15K
22K
L_
M~_
A~~i
100
I-;;y,{-
~
OVERLOAD
Cl05
~
15K
~
~J~9
INDICATORS
.,.
C106 R109
~
lUF .01UF
4.71.4
+ U105:8
R1D6
~Ql0l
I
~~~~
MP~~~2
MP~~~2.
~
LM3.3
10K
Jl77
Rll~ll
#,Cl0.
P-G)'>U--',L05-:A-~
47K
~UF
R14a
~
-!
LM39J
C108 +
R;15
101<
T
10url
"",,1M
R2D4
lK
:-
~~
I
~.
I
I I
'-
__
J
P114
~LV
1~~811
HE'AO~.~'22
C113_Jo
MIC
iN'
l.,-.;
.6K
100PFI
>-j!.
Cll2
..,..
+5102
0
t100PF
Rl.B
~
lK C166 +
j-
fb6b4]
U115:A
lU'I
~
II
P~2
II
~4002
U11J:A
- 2 0167
NE575
'i
0 r100PF
I I
PORTABLE
3
C161¢;;OK
10K
I..
,.
U113:8
SELECT
!_LJ
....
~~,
..
~
I
~
'I
NE575 C175 C176 R132
Jll1
>-----.>--------I+--------+--...i
Il
IH
3
.•
K
~
V II'
~~U'
5107r'°I'U'_6'vBvK'-_4
: I
~
IR200
R202
J
R201
5
10
1
lOOK lOOK
1K
J..
0169
ORTABLE
J C166 + Y +
l00UF
T Y
1- 06031
lu'I
I
I
~I
~~1;:;T
"7
I I
C162IT::E0K
101<
I"
I I
'~,~'
A~l[)
1..1
>-------t_------I---~
IlH 3
.•
Kr
L,
I
Jll0~
L-,"-J
ORTABLE
.+
U"':A"
1,C'63
NE575
1°
r
10QPF
PORTABLE
1
9!~~~OK
..
0
'OK
I.,
SELECT
'o,V
F
,:...J
I
~
I I U112'8
0111
0172
R130
Jl09
~>-----------------\-----.
..
jIH
3
.•
K
~
V
i'
I
~75.
lOU'
S~
10I'U'_'v6B'vK,-_~
PORTABLE
t
Rl~5J7
C'6':
~
1~JgJ'
1,RJ;~
~~~f
1- 06051
~
0~~:"702
lU'I
I
l
~:
~~;~
u~~~~~
T Y
I I
C160~OK
10K
I"
'-
__
J
;~~'
A~4S
1..1
>--------~-----+_-t_--'_lIlH
3
.•
Kr
L,
I
Jl0B~
L-,"-J
ORTABLE
2+
3-36