Hitachi 46W500 Training page 45

R528 R529
ABL
C511
D501
PPD5
SW
9
+115V
10
PPS3 PPD3
RH37
ABL Switch
9 9
RH41
Black Panel
RH39
2 2
RH42
Power
Supply
PWB
On Black Side Panels On
Off Gray Side Panels On
ABL
3 3
DP-3X Chassis A.B.L. Circuit Diagram
Q511
HVcc +9.3V
R531
R530
C512
R532
Black Panel
ABL Switch
ABL switches QH04~05 slightly reduce the
overall operational point of ABL due to the loss
of overall brightness levels.
Off High Color Temperature
On all other Temperatures
RH36 180K
QH04
ABL Switch
RH38 47K
QH05
Black Panel
Clamp
As Brightness goes Up, ABL Voltage
goes Down. (Inverse Proportional)
75
Rainforest
D502 R533
ABL
78
C514
C513
23
DAC2
Deflection PWB
RH27 27K
To QH01
Collector of High Voltage
Output Transistor
QH03 only
RH27 & RH28
used in
ABL Pull-Up
4X3 models.
Resistors
RH28 39K
[ Current Path ]
Sw +10V
DH16
RD30EB4
6.8K
RH31
CH18
1080i
63
I501
Y In
IC R572
SDA2
SDA2 29 31
SCL2 30 28 SCL2
R571
48
ABL Switch
FBT
LH06
TH01
DH13
B+
5
50P
9
RH23
1 Gnd
10
To
Anodes
C
To Focus
ABL
3
LH01
CH14 CH21
RH21
RH25 18K
RH32
180K
RH24 DH15
43K
HZ22-2L
Micro
I001
Signal
PWB
CH17
Stops
H. Drive
IH01
OVP
7
DH14
RH26
RH09 CH10
XRay Protect