M24C16; Pt6306 - NAD T 752 Service Manual

M24C16

KEYBOARD: U210

PT6306

KEYBOARD: U203
44
PCB
45
BK
43
LATB
37
RDIO RDIO
36
LDIO LDIO
DIRECTION
CONTROL
UNIT
41
DIR DIR
38
CLKB
VDD2 02
31
50
79
VSS2 05
34
47
76
16Kb /8Kb /4Kb /2Kb
/1Kb
NC / NC / NC / E0
/ E0
NC / NC / E1 / E1
/ E1
NC / E2 / E2 / E2
/ E2
V SS
RDIN SQ1
RDOUT
LDIN
LDOUT
SHIFT
UNIT
DIR
CLK SQ64
M24Cxx
1 8 V CC
7
2 WC
3 6 SCL
4 5 SDA
G QB1
LATCH
UNIT
QB23
G QB24
LATCH
UNIT
QB41
G QB42
LATCH
UNIT
QB64
40
51
HVO1
73 HVO23
82
HVO24
99 HVO41
08
HVO42
30
HVO64