Sony STR-K7100 - Multi Channel Av Receiver Service Manual page 47

IC100 PT6315 (DISPLAY Board)
44 43
SW1
1
SW2 2
SW3 3
SW4
4
OSC OSC
5
DOUT
6
DIN 7
Serial
interface
CLK
8
STB
9
KEY1
10
11
KEY2
12 13
IC4001 SI-8050S-LF1101 (DCDC Board)
REGULATOR
OSC
+
–
COMPARATOR
+
–
ERROR AMP
1
42 41 40 39
Grid driver
Command decoder
Display memory
24 bits x 12 words
Timing generator
key scan
Key data memory
(2 x 16 bits)
14 15
OVER
CURRENT
PROTECTOR
LATCH
RESET
&
DRIVER
OVER HEAT
PROTECTOR
VREF
2 3 4
38 37 36 35 34
Multiplexed driver
segment driver
16 17 18 19 20 21 22
5
STR-K7100
GRID10
33
32 GRID11
SEG17
31
30 VEE
SEG16
29
SEG15
28
27 SEG14
SEG13
26
SEG12
25
SEG11
24
SEG10
23
47