Advertisement
a
Muting at Start of ptayback
Mode (Stop 1s p;6r_
back Model)
When the tape deck
mode from stop mode,
mode control IC (BAg4i
level, and pin 1 of IC4(
temporarily to H level
.4 is fully
charged up).
cancellation of muting-at
>de is dêtermined by tt u
100ms) of C4}6connect-
is arso added due to ii3î;lil"Tâ1,r.îiï,ii,l#i
Consequenfly, line outplî *rù;;l;
cancelled
approximately 0.6sec
lfter swidilg
t"o ptayuactc
*:dg, thereby eliminating tt
"
slro"t "nài*u g"rro"t_
ed when the head nrakes
"ir"t"J
*itrri["
,"o".
5.4 RECORDTNG MUTING
\qf3
IEC/PLA1
O-REC I O.PLAY
l r l H
Muting at Start of Recording Mode (Stop
to Re_
cording Mode)
C438 connected to pin g of HAL2006
is a
timing capacitor used to regubtÀ trre
lperationat
timing of the head
_switch (the rà"oraing signal
shorting relay RyB01 connectea to-pin
6). When
switching to recording mode frorn-riop
mode,
9jl8
i: charged up, anâ pin 6 switàhed from
L ro
n revel once the capacitor has been
charged up.
ïVhile this C4Bg is--being
"fr*eàJ "p
(approx.
200ms), the LINE OUTPU"T i, *-,itua.
ôat is mut_
ing is cancelled after a delay of abàut
200ms,
thereby eliminating switching
"tir".
---
F i s . 5 - 1 4
Fig. 5-15 Muting at start of recording
FiS. S-t0 Recording muting
This function is employed in preparing
blank
sections of unrecor.l-eà iupu ,"ffi"a
for MS
(automatic location
.ot. stari'or t."""]]bi"" e e426
Q427 arc both on durir
------l' I
99t-di"g amplifier
input
(41.03 and e104) are
remrans unmuted. If Si
switched on, e10B and (
passed via SB, D426.
Q103 (Q104). The .u"o*
attenuated, and tape har
any signal being reco_rded. At the
same time, +B i6
lJro pur:g9 via SB, R480 and isorôz b e426,
jf,i"glv let'ting up rhe REC Mu-T-E-i;icator lamp
(LED507).
B E C A M P
lc 4Dt (HAI2OO6)
Muting at start of playback
Advertisement
