Read Sony XVM-R75 Service Manual online
6
6
XVM-R75
2-2. BLOCK DIAGRAM — B/L (DISPLAY) SECTION —
24
12
8
11
16
15
1
15
20
6
11
9
2
VCO
+5V REG
U14
CURRENT
DETECT
Q37
BUFF
1
16
4
VCO
BUFF
FLIP
FLOP
PWM
SW
14
SWITCHNG
Q38,39
+11V REG
Q1,3
KEY MATRIX
K1-K5
SWITCHNG
Q35
SWITCHNG
Q36
19
3
VR19
AUDIO
LEVEL
L
VR18
AUDIO
LEVEL
R
VDD(2)
VDD(1
TRIN(2)
VCO OUT(2)
AL IN
AR IN
VCO OUT (1)
RES(2)
TRIN(1)
RES1
AUDIO LEVEL
U13
SYSTEM CONTROL
U505 (2/4)
BATT
RD3/PSP3
TFT ON
RC2/CCP1
DIMMER
RA0/AN0
KEY0
FT ON SW
Q40,41
D15-17
D18-20
LED
DRIVER
Q25
D15-20
(AUDIO LEVEL)
B+12V
F3
BACK LIGHT CONTROL
U17
VCC
C1
C2
BACK
LIGHT
D31
D34
L20
LED DRIVER
Q24
B+12V
MAIN
SECTION
A
(Page 5)
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