Technics QUARTZ ST-Z400L

ground,
inals and
ternally.
must be
1 output
floating.
device is
memory
terminal
will be
5.2msec
5V
ov
0.5msec
hen the
selector
m BLOCK DIAGRAM
—/ coon FM Signal
aaamp / aaae> AM Signal
AM
(MW ANT coil)
L202
(LW ANT coil)
L251
Q252
MW — ON
LW ~OFF
CFIOI CFIO2
Q101,102
=
FMB)
(
FM-
IF
(\
ICIO1
y\ amp. AN7274NS
( FM IF AMP/ DET
AM CONV
I FM IF signal 4B)
I
oli
25 24
FM
| F Limiter
(Mw OSC
L203
ofS 4
Q253 of
MW = ON
LW ~ OFF 2 Sib
{f-
CD) (LW OSC|Icoil)
Ce L252
Go) SE)
Q254 MW-—ON
LW -— OFF
AM RF signal
TE
(AM IFT)
Q251
MW--OFF (>
LW+ON Vel
FM 1C301
(PLLVCO adj.) Gs) AN7472S
VR30I FM MPX
H bi
VR302
(Separation §
odj. i
Q902,903,904
Loop
filter
Crystal!
Osc
FM |MEMORY| MODE
oO O 2) O ©) oO
CHE CHT cH8
a] -t]} | Ce
oO oO ©) O oO O
CH2 CH3
|
|
|
Ls as |
FM/AM selector
Key matrix
hy | Lh
Q404
)
|
LY
i)
)
|
(Signal
indicator
)
|
i
X
KK]
0403
I
|
u
J
TTial
qm
L
;
De-
Q402
ay
+8)
emphasis
Signal ind. drive
dO. Ged
Liquid Crystal Display (LCD)
Stereo ind.
Qg0! switch
iit
CY Stereo broadcast receive L