Onkyo TX-8255 Service Manual page 27

IC BLOCK DIAGRAMS AND DESCRIPTIONS
M66005-0001AFP(FL tube drive IC)
14
CS
SERIAL
RECEIVE
15
SCK
CIRCUIT
SDATA
16
RESET 13
Xin 21
CLOCK
GENERATOR
CIRCUIT
Xout 20
Vcc1
Vcc2
19 60
DISPLAY
CODE RAM
CGROM
(8 bits 16)
(35 bits 160)
CGRAM
(35 bits 16)
RAM
write
INDICATOR
CONTROL
code
REGISTER
selector
DISPLAY
CONTROLLER
22
Vss
23
31
33
59
61
64
17
18
1
DIGIT
OUTPUT
CIRCUIT
12
32
Vp
TX-8222
SEG36
SEG28
SEG27
SEG01
DIG16/SEG40
DIG13/SEG37
P1
P0
DIG12
DIG01