Sony PRS-500 Service Manual page 29

– MAIN Board –
IC1605 LT1931ES5#TR
(EXTERNAL)
R2
NFB
C PL
R1
(OPTIONAL)
(EXTERNAL)
V OUT
Q1
V IN
IC1615 LM75CIMMX-3 NOPB
SDA 1
2
SCL
OS 3
GND
4
3
R4
150k
R3
30k
C C
Q2
x10
R C
–
A1
g m
+
R5 R6
80k 80k
4
IC1606 TC7W53FK (TE85R)
8
1
2
T Set Point
HYST
Resister
Reset
T Set Point
OS
Temperature
Resister
Threshold
Set Point
Comparator
1.2MHz
OSCILLATOR
RAMP
S +
GENERATOR
A2
–
COMPARATOR
5
7 6
IN
IN
C C
OUT OUT
LOGIC LEVEL
CONVERTER
3 4
Two-Wire Interface
Configuration
Pointer
Resister
Resister
9-Bit Delta-Sigma Analog-to-Digital
Converter
10-Bit
Digital
Decimation
Filter
PRS-500
2
0.01 Ω
S
R
Q Q3
LATCH
DRIVER
5
8 VCC
7 A0
6 A1
5 A2
Silicon
Bandgap
Temperature
Sensor
1-Bit
D/A
Σ
1
29