Circuit Operation Description; Pre-Amp Block Diagram - Akai HX-RS Service Manual

V. CIRCUIT OPERATION DESCRIPTION
5-1. PRE-AMP BLOCK DIAGRAM
UP
~
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ o_o_w--<N
8:P,
MIC I N r ~ - - - - - -
IC I M5218L
r-- - - - - ,
I re
11
I
3
MIC/LINE
~-~
I
I ELECTRONIC I
I
2
AMP VOLUME
SW
IN MIC JACK
IC4 LC7530
L _ _ _ _ _ _ _ _ ...J
SYSCON PCB
LINE O U T ~ - - - + - - - - - - - - - - - . . - - - - - - - - '
METER OUT
(TO SYSCON)
TR3 2SC2320
(
I
I
/
/
I /
~/
PB
MUTE
TR26to28
PB
AMP
I
RL I
I .--....;... _ _ _
L_____
REC/PBS
RELAY
TR26 2SCl843
TR27 2SCl312S
TR28 2SC2320
TR29 2SC2603
!5
9
IC3 NE654
DOLBY
SWITCHING
IC
IC2 NE652
DOLBY
IC
IC5 LA6458S
IPLS
AMP
TR22,23 2SC2603
BIAS
osc
C77
,
REC LEVEL
IC4 LA6458S---(GX-R6)
TR? 2SC2320---(HX-R5)
TR8tol3 2SC2320
REC
AMP
TR6 2S01012
REC
MUTE
BIAS TRAP
REC MUTE
P. B MUTE
DOLBY SW
OFF/B/C
IPLS OUT
REC/PB SW
L . . - - - - - - - - - - - - - - - - - {
1
OSC ON/OFF
Cr02 BIAS
METAL DET
Fig. 5-1 Block Diagram of Pre-Amp P.C Board
z
0
u
en
>-
en
0
I-
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - S E R V I C E M A N U A L H X - R 5 / G X - R 6 ; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9