Technics ST-CA1080

Hi SCHEMATIC DIAGRAM
(Parts list of pages 33~37.)
(This schematic diagram may be modified at any
time with the development of new technology.)
| ST-CA1080 ST-CA1080 |
1 2 3 4
FLSOI(RSLOI82—-F )
A
FL DISPALY
Notes 1:
¢ $801 : Play timer (({J PLAY) switch.
¢ $802 : Record timer ( {) REC) switch.
e $803 : LW/MW (LW/MW) switch.
e $804 : FM (FM) switch.
e $805~807: Internal source input select switches.
(S805: CD, S806: TAPE, S807: DCC/
PHONO)
¢ $808 : External source input select (VCR 1/VCR 2/
VDP) switch.
¢ $809 : Tuning mode select (TUNING MODE) switch.
¢ $810, 811 : Clock/Timer (CLOCK/TIMER) switches.
(S810: MODE, S811: SET]
e Signal line
: REC out signal (Lch)
meseP © AM (LW/MW) OSC signal
wm - AM (LW/MW) signal
==peee - Positive voltage lines
= === - Negative voltage lines
coon : FM OSC signal
: FM signal
: AF signal (Lch)
: Surround speaker drive signal
: Center speaker drive signal
¢ Important safety notice
Components identified by A\ mark have special
characteristics important for safety. Furthermore,
special parts which have purposes of fire-retardant
(resistors), high-quality sound (capacitors), low-noise
(resistors), etc. are used as occation calls. When
replacing any of components, be sure to use only
Vir
manufacturer’s specified parts shown in the parts list.
¢ All voltage values shown in circuitry are DC voltage in
FM signal (Stereo mono) reception mode.
»* Figures in ( ) Stand for DC-voltage in MW signal
reception mode.
* Figures in <
reception mode.
? Stand for DC-voltage in LW signal
* Figures in[___] Stand for DC-voltage in muting mode.
e Caution!
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care
during repair.
¢ Cover the parts boxes made of plastics with alminum
foil.
¢ Ground the soldering iron.
e Put a conductive mat on the work table.
© Do not touch the legs of IC or LSI with the fingers
directly.
ANA-07037 / DRUCK 2
23.4)
Re34,, 100k \
R835, ,,100!
R636, 100K
R833
DSsIO
MAIS TA
—
<-20.70
(]-21V) -23.5V
(TUNING
MODE)
—
For (EJarea.
vam
DBIG . MAIGSTA
ee oe MAIGSTA
Posie ‘ MAIG5TA {
=—?=
f Delt MAIGSTA 1
-——
For [EGJarea.
DEFGHIJKLMNOPQABCDEFGHIJ
ee ERATE
mm ~leVi-i6 es)
10 (&
1S VI-e6V)
25.81) pg
(-25.8V) pg (-216V) p <-20.4V) p (-21.6V) p
(-21V) p
(-23.2V? p
(-25V) p
(-21.5V) p
F4.19MHz TU. JoGB@®
Icsol
M38173M6276F
SYSTEM CONTROL/
FL DRIVE
HT
T {| 1K [Reaa ik |
Re45
R846) 1k
Hee nee |
pBEEe yok
BACGFEDIH
Q8i2,813
UN4216TA
LED DRIVE
R8I7 RBIs RSIS R820 R821 Re22 R823
4.7K 3.3K 2.2K 1.8K SK 2K 1K
(VCRI/ | S807
veR2 | (DCC $806 S805 | se04 | S803
/NDP) {/PHONO)| (TAPE)} (CD) | (FM) SL ree FeAy)
_— —_ —— — ee
Serv 1]
eo]
t {SEM OTE SENSOR)
D804
MAIGSTA
0805
MAI6STA
bso6
MAIGSTA
R865 100K
8. DATAC
6nn®
CN803B
z Bs A (1) STEREO
< Nie B
< g X c
a a0 to Kal main
a a oa D (S] DATA IN| CIRCUIT
(4) (2)=('!) E (CNBO3A)
F On page 24
G
H
1
LAS608M-TE-L |
BUS LINE DRIVE/
RESET /HALT to main
CIRCUIT
(CN8O2 A)
IssegitA
alee se |
toR Main
CIRCUIT
(CNBOIA)
On page 24