Onkyo TX-8522 Service Manual page 33

IC BLOCK DIAGRAMS AND DESCRIPTIONS
M66005-0001AFP(FL tube drive IC)
14
CS
15
SCK
SDATA
16
RESET 13
Xin 21
CLOCK
GENERATOR
CIRCUIT
Xout 20
LA7956(Video Switch)
6dB
amp.
control
driver
1 2 3 4
VIDEO OUT A B VIN1
Vcc1
Vcc2
19 60
DISPLAY
CODE RAM
(8 bits 16)
SERIAL
RECEIVE
CIRCUIT
INDICATOR
CONTROL
REGISTER
DISPLAY
CONTROLLER
22
Vss
video switch
(4 input 1 output)
5 6 7 8 9
GND VIN2 VCC VIN3 VIN4
CGROM
(35 bits 160)
CGRAM
(35 bits 16)
RAM
write
code
selector
32
Vp
S2 S3
(2 pin) (3 pin)
H H
L H
H L
L L
23
SEG36
31
SEG28
33
SEG27
SEG01
59
61
DIG16/SEG40
64
DIG13/SEG37
17
P1
18 P0
1
DIG12
DIGIT
OUTPUT
CIRCUIT
DIG01
12
VIN1 VIN2 VIN3 VIN4
(4 pin) (6 pin) (8 pin) (9 pin)
ON OFF OFF OFF
OFF ON OFF OFF
OFF OFF ON OFF
OFF OFF OFF ON
TX-8522