Block Diagram - Boss Roland GT-8 Service Notes

Dec.2004

BLOCK DIAGRAM

fig.block.eps
MIDI IN
JK7
/ OUT
JK8
SUB EXP PEDAL
/ SUB CTL 1, 2
IC37
JK10
PHOTO RELAY
AMP CONTROL
TLP172A
JK1
INPUT
JK2
IC1a
PHONES
IC6a
JK3
OUTPUT L
(MONO)
IC6b
JK4
OUTPUT R
JK9
DIGITAL OUT
IC7a
JK5
RETURN
IC7b
JK6
SEND
MAIN SHEET ASSY
24
IC2a
IC2b
IC3
CODEC
IC5a
AK4552
VR1 IC5b
TR1
IC28
IC27
CS8406
IC8a
IC9
IC8b
CODEC
AK4552
IC22 CPU
H8S/2312S
IC20
DSP (MASTER)
IC21
DSP (SLAVE)
IC24
DRAM
CN5 CN1
EXP BOARD ASSY
PEDAL VR
ENC BOARD ASSY
ENCODER
CN6 CN9 CN6
CN4 CN8
SW1 BOARD ASSY
PANEL SW, LED
CN3 CN7
CN2 CN5
SW2 BOARD ASSY
PEDAL SW, LED
IC19
CN3
SRAM 2M
SW3 BOARD ASSY
PEDAL SW, LED
IC25
FLASH 8M
SW SHEET ASSY
IC12
CMOS
CN1
LCD UNIT
IC15
CMOS
CN4
CN2