Block Diagram ブロック図 - Roland TD-8 Service Notes

TD-8
Block diagram / ブロック図
Foot SW
Pads with compressor
SVRs LED
light on
static
SW/LED
LCD
unit
TRIGGER
Value Dial
MPX
IC1
4->1
IC14
CPU
PERIPHERAL
TRGLED
clk:MCLK
MXSVR
(28.224MHz)
PEDAL[0/1]
IC23
XINT
RXD
Receiver
XDREQ
IC15
IC24
CPU
Q15,Q16
TXD
Trans-
mittor
SH7016
Clk:28.224MHz
(7.056x4)
MCLK
A
IC29,32,34
MPX
14->2 IC16
B
DRAM
RIM[0..8]
XBATNG
Comparator
2.7<Vbat
MIX IN
PHONES
IC56
matrix
MASTER
IC57
PANEL
IC5 IC6
VSNARE[A/B]
DAC
CODEC
A
IC50
CLICK MASTER
XERAS/XECAS
IC49
IC55
DRAM
TONE
GENERATOR
clk:24.576MHz
XCSTG
(XP)
XCS0
XRD/XWRL
XINTTRG
XDACK
XINTTG
XWAITTG
XRAS
XCSUSR
XLCAS
XRD XCSPRG
XUCAS
XWRH XRD
RDWR
XWRL XWRL
IC39,40 IC36
USER PRG.
RAM flash
Wired OR
MIX IN
IC101(Jack Board)
PHONES
IC4
MASTER
IC8
DIRECT
IC9
B
DAC
IC11 IC12
DIRECT
XWCS0
IC44
WA[0..21]
WAVE
MPX
WD[0..15]
4->1
ROM
Multiplexor
XRD
XWRL
Amplifier/
ADDRESS Analog circuit
DATA
STROBE
XCSPTN
XRD
XCSPTN
XWRL
XRD
IC37 IC38
PTN PTN
flash mask
Analog
Power
Power
Supply
XRST
RESET +5V
Sep. 1999
13