Display Board - Sony STR-KM5000 Service Manual

– DISPLAY Board –
IC100 IC-PT6315
LED1 1
LED2 2
LED3 3
LED4 4
OSC 5 OSC
DOUT 6
DIN 7
SERIAL
8 INTERFACE
CLK
STB 9
KEY1 10
KEY2 11
– DCDC CONVERTER Board –
IC4001 SI-8050S-LF1101
OVER
REGULATOR CURRENT
PROTECTOR
OSC RESET
+
–
COMPARATOR
+
–
ERROR AMP
1
44 43
4-BIT LATCH
12-BIT SHIFT
REGISTER
KEY DATA MEMORY
(2 x 16 BITS)
TIMING GENERATOR
KEY SCAN
DISPLAY MEMORY 24-BIT OUTPUT
24 BITS x 12 WORDS LATCH
COMMAND DIMMING
DECODER CIRCUIT
12 13
LATCH
&
DRIVER
OVER HEAT
PROTECTOR
VREF
2 3 4 5
42 41 40 39 38 37 36
12 4
GRID
DRIVER
8
8
MULTIPLEXED
DATA
SELECTOR DRIVER
8
24 16
SEGMENT
DRIVER
14 15 16 17 18 19 20
STR-KM5000
35 34
4
33 SEG19/GRID10
32 SEG18/GRID11
31 SEG17/GRID12
8
30 VEE
29 SEG16/KS16
28 SEG15/KS15
27 SEG14/KS14
16
26 SEG13/KS13
25 SEG12/KS12
24 SEG11/KS11
23 SEG10/KS10
21 22
45