Kenwood KAC-8070 Service Manual page 9

4-channel power amplifier
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A
B
Cc
[p)
E
F
|
Qlot, 201, VR 10! , 201
$= IDLE_30mA
1c3
TSOLATION @ PRE ORIVER
TOLE
Q10z, 202 © a104, 204
ey
CURRENT DETECTION
RIO1
100
CIOS
Rice
toon
2k
Cctol
0,001
RiO9
56K
203
R202
IK
cis
0.1
R208
¢ 2.4K
C201
0,001
R209
56K
R206 9.1K
R204
20K
c205
R208
0p
2k
C204
loop
R207
2K
R35
820
1/2W
R34
820
I/2w
Q301, 401
0302, 402
1¢6,7
POWER
CONTROL
C303
+
R405
39K
+.,6403
a
|
:
ua
a
oO
wna
| |=
:
|
|
5
8
|
|
v7 aio
fe eantat eee ah
tcl
pPC494C
Q1,104,204
:2SC2458(GR)
Qi0
1 2SC1815 (BL)
DI
1c2
ipPCl237H
Q2,8,9
1 2SA950(Y)
Q10!,201
:2sc342i(y)
02,3,10,101
1c3
1 NJM2068D-D
03,4
1 2SD809(F, E)
Q102,202
: 2Sc1986(0,Y)
102,201,202
104,5
2 pPCl270H
Q5,6
1 2801062(S)
Q103,203
: 2SA771(0,Y)
04,5
1C6,7
1 TA7T250BP
Q7,301,401
: 2SA1048 (GR)
Q302,402
: BAIL4M
06
2SA771
2SC3421
2
2SC1986
SER
|
2SA950
oF
cE
2801815
2
2SA1048
8
8
ec
ce
1K
VR201
R214
1K
R213 3.3K
nee
eee a
> RM4Z
07
1 1S2076A
08,9
zor
DRHIZ
zo2
FMUI2S
Z03,4
2SD809
8
}
4
1
NJM2068D-D
R124
10 tw
R225
10 1/2W
Q202
45/221
S60
1
R37
2.2K
C2 0,047
c4
RIS
5.6K
top
a1
rss.ik
| *
| re6so
icy
ea
ce
15
00,
Cl2,,0.1
RID
5.6K
Q8,RLI
| MUTING
Q7,1C2 | PROTECTION
ut
RIO
18K
coke a n d
le
ga ah
a
a
es
ce
Bc ee
ee
pee
> FMUI2R
LED!
: B30-1120-08
NO. PINE
KAC-8070
i
[1N4002
—_——\—
+B LINE
i
DHZ7CIL
:
[HZ6C2L
=<
—B LINE
;
;
Pe
i
DHZ9A-2
UPC1270H
DC voltages are as measured with a high impedance voltme-
| CAUTION: For continued safety, replace safety critical Compo-
UPC1237H
UPC494C
9
UPC7250BP
ter with no signal input. Values may vary slightly due to varia-
tions between individual instruments or/and units.
Les tensions c.c. doivent étre mesurées avec un voltmétre a
haute impédance sans signal d'entrée. Les valeurs peuvent dif-
férer legerement du fait des variations inhérentes aux appareils
et aux instruments de mesure individuels.
Die angegebenen
Gleichspannungswerte
wurden
mit einem
hochohmigen
Spannungsmesser
ohne — Eingangssignal
gemessen. Dabei schwanken die MeBwerte aufgrund von Un-
terschieden zwischen einzelnen Instrumenten oder Geraten u.
U. geringfigig.
nents only with manufacturer's recommended parts (refer to
parts list). A Indicates safety critical components. To recduce the
risk of electric shock, leakage-current or resistance measurements
shall be carried out (exposed parts are acceptably insulated from
the supply circuit) before the appliance is returned to the Custom-
KAG-8070
er.

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