Sony HCD-HDX277WC Service Manual page 72

HCD-HDX275/HDX277WC/HDX279W/HDX475/HDX576WF/HDX675
QQ
3 7 63 1515 0
IC620 TK11150CMCL-G
(HDX275/HDX475/HDX576WF/HDX675)
IC620 TK11250CMCL-G
(HDX277WC/HDX279W)
6 5
CONTROL
CIRCUIT
CONSTANT
CURRENT
SOURCE
BANDGAP
REFERENCE
1 2
IC103 BU2099FV
20 19 18 17 16 15 14 13 12
12 BIT
CONTROL
SHIFT
CIRCUIT
REGISTER
TE
L 13942296513
12 BIT
STORAGE
REGISTER
2 3 4
1 5
– FL Board –
IC100 PT6315
LED1 1
LED2 2
LED3 3
LED4 4
OSC
OSC 5
DOUT 6
DIN 7
SERIAL
www
INTERFACE
CLK 8
9
STB
KEY1 10
KEY2 11
.
72
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4
OVER HEAT &
OVER CURRENT
PROTECT
3
11
OUTPUT
BUFFER
(OPEN DRAIN)
6 7 8 9 10
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
x ao
y
COMMAND DIMMING
DECODER CIRCUIT
i
12 13
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8
– JACK-KEY Board –
IC102 S-T111B33MC-OGSTFG
ON/OFF
1
ON/OFF
CIRCUIT
VSS
2
NC
3
– RELAY Board –
IC701, 711 BA6956AN
Q Q
3 6 7 1 3
1 2 3 4
42 41 40 39 38 37 36
12 4
GRID
DRIVER
8
8
DATA MULTIPLEXED
SELECTOR DRIVER
8
24 16
SEGMENT
DRIVER
u163
.
14 15 16 17 18 19 20
2 9 9 4 2 8
OVER CURRENT
PROTECTOR
REFERENCE
VOLTAGE CIRCUIT
TSD
1 5 0 5 8 2 9 9 4
CONTROL LOGIC
5 6 7 8 9
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
m
26 SEG13/KS13
co
25 SEG12/KS12
24 SEG11/KS11
23 SEG10/KS10
21 22
9 9
5 VIN
4 VOUT
2 8 9 9