Panasonic AJ-D400P Service Manual - 5. Head Optical Ass’Y 2
5. Head Optical Ass’y 2
5-1. AWB Preset Level Adjustment
BOARD CAM SYSCON
SPEC.
2.0 ± 0.01V
TEST
TP3514 (AWB R), TP3515 (AWB B)
TG3500 (GND)
ADJUST EVR
MODE
------
M.EQ
Digital Volt Meter, EVR
1. Set the AWB SW to “PRESET” mode.
2. Connect the DVM to TP3514 (AWB R) and
TG3500 (GND).
3. Set the EVR to [0E][66][61]. And press the [
®
] or
[
¬
] key in EVR so that the DC voltage is within
specification.
4. Connect the DVM to TP3515 (AWB B) and
TG3500 (GND).
5. Set the EVR to [0E][66][62], and press the [
®
] or
[
¬
] key in EVR so that the DC voltage is within
specification.
6. Turn the power switch to OFF.
5-2. RGB Pedestal Adjustment
BOARD Pre Process
SPEC.
A = 0 ± 50mV
TEST
TP3 (R), TP203 (G), TP403 (B)
ADJUST VR1 (R), VR201 (G), VR401 (B)
F.NBR.
Close
M.EQ
Oscilloscope, EVR
1.
Press the [F2] and [2] keys in EVR or input
[1E][20][00].
(Set the “PED R, G, B” signal to ; 2.0VDC)
2. Monitor
the
TP3 and adjust the VR1 (R PED) so
that the blanking level is flat.
3. Monitor
the
TP203 and adjust the VR201 (G PED)
so that the blanking level is flat.
4. Monitor
the
TP403 and adjust the VR401 (B PED)
so that the blanking level is flat.
Monitor the centre of the carrier because there is
carrier on the Black Level And Pedestal Level.
5-3. 0% ABB Adjustment
BOARD Pre Process
SPEC.
------
TEST
------
ADJUST EVR
MODE
------
M.EQ
EVR
From next “5-4. Test Signal Level Adjustment” are
necessary this 0% ABB setting. If perform the
adjustment individually, this 0% ABB setting must be
done before adjustment.
1. Set the EVR to [1E][21][00].
2. Execute the ABB by front switch.
A
BLACK
A
BLACK
BLACK
TP3003 (R)
TP3203 (G)
TP3403 (B)