Technics SA-EH770 - Page 59

S904
(
PLAY/ REC
)
SCHEMATIC DIAGRAM-1
FL901 (A2BB00000084)
1
7
5
4
6
3
2
U
T
S908
(
INPUT SELECTOR
)
S907
(
SET
)
S906
(
TUNING MODE
)
S905
(
FM AUTO/MONO
)
JK903
PHONES
3.5mm STEREO
R997
150
R996
150
D973
MA4030MTA
C921
1000P
C922
35V33
C920
50V4.7
R922
10K
R921
10K
R944
2.2K
R912
4.7K
R911
3.3K
R910
2.2K
R909
1.8K
R916
1.5K
R915
1.2K
R914
1K
R913
820
R908
4.7K
R907
3.3K
R906
2.2K
R905
1.8K
R904
1.5K
R903
1.2K
R902
1K
R901
820
FL DISPLAY
1 6 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 53 542 5 7 9
W905
S901
(
/
)
C928
50V4.7
NOTE:
The number which noted at the connectors on the schematic diagram as
"SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2"
indicates the schematic diagram serial number located on the left corner in the schematic diagram.
A
OPERATION CIRCUIT
C919
50V4.7
C927
50V4.7
C396
0.047
C923
0.1
C395
0.047
D974
MA165TA
C907
470P
C924
0.1
C904
0.01
R924
1K
C908
470P
R925
1K
S914
(
KARAOKE
)
S915
(
ECHO
)
S910
(TUNING,
)
S911
(
TUNING,
)
S912
(TUNER/ BAND)
S913
(DIGITAL
S.WOOFER
)
S909
(6CH DISCRETE
INPUT)
ABCD
E
FGH I JKLMNOPQRSTU
X
W
V
ABCDEFGHIJKLMNOPQRSTUVWXYZ
S902
(
CLOCK/ TIMER
)
S903
(-
DEMO
)
1 2 3 4
C414
6.3V470
CN904
C415
50V1
1 2 3 4
W904B
MIC JACK CIRCUIT
IC401
TA2011S
MIC AMP
JK902
MIC2
6.3mm
MONAURAL
1
2
4
5
6
JK901
MIC1
6.3mm
MONAURAL
1
2
4
5
6
6 71 2 3 4 5
C403
4700P
Q401
2SC5398RSTA
MIC AMP
C406
25V4.7
R415
470
C413
50V1
R412
1M
C416
16V10
C412
1000P
C410
16V10
C411
100P
R411
330
R410
2.2K
R409
4.7K
C407
0.01
C409
50V1
C408
0.022
R406
470K
R407
4.7K
C405
1000P
R405
4.7K
C417
0.022
R404
470
C404
50V3.3
R402
680
R421
22K
C401
0.022
R403
22K
R401
680
L401
3.3 H
VR401
5K(B)
(MIC VOL)
W401
C421
0.1
B
Y
R416
330
C
B
:AUDIO SIGNAL LINE
1.3V 0V 1.9V 0.8V 5.2V
3.3V
1.8V
2.3V
:MIC SIGNAL LINE
:POSITIVE VOLTAGE LINE