Sansui SC 3300 Service Manual

Page 2

. 1. BLOCK DIAGRAM

1-1. Playing Operation (L-CH)

fi
PB LEVEL
REC I-IEAD AMP J . V- _
56qu EC 5 ' PS -'
REC/PB FLAY -. A W > __|IIEAD PHONE
HEAD 5, L1 Jew
VRGOII
e [D
TRoe l
Sm 2 7 4 l. 1 210 14' 15
Ssoan LFM J 'l I"
LPF REC 5602a
PLAYi o
APE SELECTOR 36,, fiOLEy NR
'+B MUTING . L NE OUT
I? OUTPUT LEVEL 40 1
VR°°2° LED PEAK INDICATOR
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Dflfiflflfiafl
TRI9.2l I. I I 'I
. . . .
-4NETER AMP LEVEL METER
DRIVER
Icaol mm
L to LCII
1-2. Recordmg OperatIon (L-CH)
r
Icm DOLBY NR BEER
MIC AMP REC LEVEL MI PS "
Jean: A REC SeOI. TR R I "i
I,3 HEAD PI-IONE
MIC ---°mAy o 0880 A l__,1 J50.
.' VRSOIa
--o- 6 Ii) g -I>I-
1, .
. 2 ,
LINE C [LFOI J 7 3 t 1 11__1zlo 14 15
IN
L DOLBY NR
15 5602: we?!
Li- . LINE OUT
Ssou MUTING OUTPUT LEVEL @
LCoI REC AMP REC EQ ADJ LED PEAK INDICATOR
HEAD l TRAP VROS TR|9.2I nannanna
I l I l
, I . . . .
TAPE -"lETER W
I vac; SELECTOR 505 LEvmfikfiéiR
Ssom BIAS ADJ (REC E0) 5505 in MUT
xom METAL VReoI
BIAS 05C 5604 ELECTRIC -°+DC :o RCH
Asa CIRCUIT HIGH BIAS SWITCH
HEAD g LH MAGNET _, +Dc
' BlAS SELECTOR OQCOUNTER
llEI |-- $333???
ngfigfi M LOGIC CONTROL
NllioEEL ,
TOR FUNCTION SWITCH
_ BRAKE PLUNGER REC PLUNGER
ass Dolby Is a trademark of
L DOlbY Laboratorles, Inc. HOLD PLUNGER PLAY PLUNGER

2. OPERATION

2) When one of control buttons FF, REW and LEAD IN, is de-
pressed, the brake plunger is turned on, causing the brake lever
to lift and the brake to be released.

3) Since the hold lever moves inward in all modes other than in
STOP (because the hold plunger (A) is ON), the cassette half
is held by hold lever.

2-1. Operation of Mechanical Section
(See Fig. 2-1, 2-2) ' '
1: Release of Brake and Operation of Hold Lever
1) When either of the control buttons PLAY or REC,is depressed,

the play plunger (C) turns on, causing the head base to lift up.
This, in turn, causes the brake lever to lift up to release the brake.

,4;