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Schematic Diagram - Pioneer GR-408 Service Manual

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1
GR-408

3. SCHEMATIC DIAGRAM

3.1 MAIN BOARD ASSY
A
AC CORD UL
02360040-006
A
2/4
POWER PCB
B
C
A
D
A
6
1
2
AC-2
250V/630mA
01804083-520
AC-1
POWER OFF/ON
(LINE OUTPUT MUTE)
OFF
SW2 : EQUALIZER OFF/ON
SW3 : POWER OFF/ON
MAIN BOARD ASSY (GR408-A)
2
3
POWER SUPPLY
R22
820/1W
-29
+29
R21
820/1W
C51
0.22µ/500V
ON
VR KNOB LED
A
4/4
JACK PCB
3
-12
+12
EQUALIZER
OFF / ON
GRAPHIC
EQUALIZER
ON/OFF
4
V
C
0
IC1B
LA6458S
B
0
R6
6.8k
IN
BUF
AM
0
0
4

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