Sony HCD-SPZ90DAB Service Manual page 44

HCD-SPZ90DAB
– FL Board –
IC901 μPD16315GB-3BS
LED1 1
LED2 2
LED3 3
4
LED4
OSC 5 OSC
6
DOUT
DIN 7
SERIAL
INTERFACE
CLK 8
STB 9
KEY1 10
KEY2 11
– POWER Board –
IC601 MIP2F20MS1SO
VDD 1
CLAMP CIRCUIT
(ILIMIT SETTING)
FB 2
VCL
27%
CL 3 IN
22%
VCL.OUT
ICL.LOW
ILIMIT VARIABLE
CIRCUIT
VCC OVP
+
2.4V –
OVERHEAT
PROTECTION
VCC UV
+
7.2V –
VCC 4
44
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
CONSTANT
CURRENT
SOURCE
FOR LIGHT LOAD
DETECTION INTERMITTENT
OSCILLATION CONTROL
+
–
GENERATOR
CLOCK
12kHz
MAXDC
S Q
R Q
RESTARTING
TRIGGER
VDD UV
+
5.7V
–
5.0V
REGULATOR
42 41 40 39 38 37
12 4
GRID
DRIVER
8
8
DATA MULTIPLEXED
DRIVER
SELECTOR
8
24 16
SEGMENT
DRIVER
14 15 16 17 18 19
6.6V
VDD CLAMP
ILIMIT
CIRCUIT
CORRECTION
CIRCUIT
DRAIN CURRENT
DETECT
AT TURNING ON
R Q BLANKING PULSE
GENERATION CIRCUIT
S Q
5.7V
36 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
20 21 22
8 SOURCE
7 SOURCE
–
+
FOR
GATE DRIVER
POWER
MOSFET
5 DRAIN