JVC KD-21 - Page 14

KD-21A/B/E/U
KD-15A/B/C/E/J/U
VARIABLE RESISTORS
VR101,201
QVP8A0B-054
Playback
gain
adj.
50kQ
VR102,202
QVL6A3A-054
Recording
level
control(on
the
front
panel)
50k
VR103,203
OQVP8A0B-013
Meter
gain
adj.
1kQ
VR104,204
QVP8A0B-054
Recording
gain
adj.
50k
VR1
QVZ3111-002
Bias
current
adj.
(norma!)
1kQ
VR106,206
OVP8A0B-054
Bias
current
adj.
(chrome)
50k.
VR501,502,503,504,505
QVP8A0B-055
Peak
level
adj.
500k.
VR301,401
QVP8A0B-023
Dolby
N.
R.
adj.
2kQ
TRANSISTORS
X101,201,102,202 2SC1327TU
X103,203 2SC1384RS
X104,204
2SC828RS
;
Rane
X5
OSCR2BARS
Main
amp.
circuit
X1,2 2SC18470S
X3,4 2SC828RS
X501,502,503,504,505
ISCB2SS
Ti
Sasa
eld
Gb
aed
a
ek
aia
BE
OS
Peak
level
circuit
ICs
1C101,201 TA7140PB Line amp. circuit
1C501
TD3404AP
Peak
level
circuit
1C301,401 NE545B Dolby N. R. circuit
DIODES
D101,201
OA90
Ge.
diode............4.
Meter
circuit
D6 RD24E(1) Zener diode
D7,8,9,10
OA90
Ge.
diode
ee
t , me Te EE ae gt rg we eh ey ee eet) Rg ie ay a Cates we P
D1,2,3,4,5,12
T30155
or
VO6B_
Si.
diode
Qwer
supplyscucult
D11 RD10E(1) Zemer diode
D502 ~505 OA90 Ge. diode Peak level circui
D501
IN4733T5
Pancrase,
eee
eer
Be
at
D401~
405
TLR102
LED(Light
emitted
diode).
.
.
Peak
level
indicator
D301,401 OA91 Ge. diode
SWITCHS
$101-1~9,
201-1~9
QSS$9201-001
REC/PB
switch
at
‘‘PB’’
mode
$102-1~3,
202-1~3
QSP0219-006
Equalizer
switch
at
normal
$103-1~2,
203-1~2
QSP0219-005
Bias
switch
at
normal
$1
QSP1110-221
Power
switch
at
‘‘OFF”’
$2-1
6251804T
Motor
and
muting
switch
at
motor
“OFF”
and
muting
“ON”
$2-2
6251804T
Muting
switch
at
‘ON’
$3
6251804T
Pause
switch
at
“OFF”
TDS27 1409-01 Reed switch
$104-1~2,
204-1~2
QSP0219-007
Dolby
N.R.
switch
Transistor IC TA140P-BC IC TA7140PB
B (Base)
(_—=——
C
(Collector)
E (Emitter)
IC TD3404AP
(TOP VIEW) 1234567
Vee
ais (2 10 9 8 tC TD3404AP
14131211109 8
'#
2
3
4
$8
CD
fag
a
Se
7
Fig.
14
No. 4150
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