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IA- 1200 CIRCUIT
DIAGRAM
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AUX
TUNER
PHONO ~!
PHONO-2
TAPE
HDi
MIC
MONITOR
PB/REC
REC OUT
MONITOR G)
Mic
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Ro
a2
TAPE HD@
PHONO- 20)
€ R4
S6K
R2
S6K
TUNER
©
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250K-8
@
250K-8
PHONO-1 73
AUX
Sla.Stb.Sic. Sid.Ste. Sif
$2a.S2b
$3a.S3b.S3c
$4a,S4b,S4c .S4d
$5a.S5b.S5c,S5d
$60.S6b
S7a,S7b
$8q,S8b,S8c.S8d
S90,S9b,S9c.S9d
$10qa. SIOb
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FUNCTION
MONITOR
MODE
TONE
- DEFEAT
LOW
FILTER
HIGHT FILTER
PRE MAIN CONNECT
SPEAKER
SPEAKER
SELECT
POWER
LIMIT
POWER
EX
MIC
DIN CONNECTOR
FILTER
SOCKET
HEAD
PHONE
TRIOS
TRI0g
2SC6500
28C650@
TRIOS
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(1.AUX, 2.TUNER,3.PHONO-1,4,PHONO-2,
5. TAPE HEAD, 6.MIC)
(SOURCE , 2, TAPE)
(\, REVERSE , 2.STEREO ,3.L,4.R,
5.L+R)
(1.OFF
2,.0N)
(1,0FF
2.0N)
(1.OFF
2,0N)
(1.OFF
2.0N)
CLMUTE
2.0N
3,0FF)
(1.4,2,A+B,
3.8)
(1. 120W, 2. 8OW,3. 40W)
(1LOFF,2,.0N)
TR208
2sc650®@
VRia , VRIb
VR2q,VR2b
VR3a,VR3b
VR4 VRS
VR6,VR7
VR84q, VR8b
VR9 , VRIO
Specification
1,
Resistors are all carbon film fixed resistors (RD%P) unless otherwise specified in the diagram.
VR8a
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150K
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R21
R204
R208
220K
15K
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PRE OUT
MAIN IN
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O.22pn
or
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10K
AUX LEVEL
TUNER LEVEL
VOLUME CONTROL
TONE CONTROL (TREBLE)
TONE CONTROL (BASS)
BALANCE
Ach LEVEL
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DL
ONS
S5OK-HB
210
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Qo
2.
The units for resistor and capacitor are (Q.) and (F), respectively.
3.
The constants for R39, R40, and R41 are decided after adjustment.
R262
470 IW
+) c232
2
i00u isv
C235
1p2sv
31
2c
2c
$201b
S20lc
820k
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(: SEPARATE RANGE
CHANNEL SELECT
R23
220K
2 FULL
RANGE
3 CENTER
WOOFER
Si
Cc
wu
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2
7
ee $80 [2,390
8
2sc6s50@
2sc281®
23 TR206
TR207
2
c
30
1
POWER AMP UNIT
DIHv-23®
D2 HV-23®
R331
Dp
si
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TR4
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D3 HV-23©
D4 Hv-23©
D5 HV-23@
Dé HV-23©
C305
R301
3aV'mee 100K
Ac SOURCE
FUSE ZA
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TRe
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$0401
VOIG
$0402
VOIG
$0404 VOIG
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R412
22
R413
0.5 IW
of
R414 22
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INS4AT Rais '05 Iw
Raig 22
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mwac
R417 OS Iw f
R418 22 43
cored
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