Advertisement
4.12 Electrical adjustment (DVD SECTION)
Note:
The following adjustment procedures are not only necessary
after replacement of consumable mechanical parts or board
assemblies, but are also provided as references to be referred
to when servicing the electrical circuitry.
In case of trouble with the electrical circuitry, always begin a
service by identifying the defective points by using the measur-
ing instruments as described in the following electrical adjust-
ment procedures. After this, proceed to the repair,
replacement and/or adjustment. If the required measuring in-
struments are not available in the field, do not change the ad-
justment parts (variable resistor, etc.) carelessly.
4.12.1 DVD Video circuit
Note
• When perform these adjustments, set the unit to DVD
mode.(DVD lamp lights up)
4.12.1.1 EE Composite Y level
Signal
(A)
• Internal colour bar
Mode
(B)
• EE
Equipment
(C)
• Oscilloscope
Measuring point (D)
• L-1 connector pin19
EVR mode
(F1)
• Jig code "43-95"
EVR address
(F2)
• "ADJUST01 : **"
(F3)
• Jig code "43-21"
(F4)
• Jig code "43-18" or "43-19" (Channel +/-)
(F5)
• Jig code "43-3C"
Specified value (G) • 1.00 ± 0.02 Vp-p (terminated)
Adjustment tool (H)
• Jig RCU [PTU94023B]
(1) Observe the V OUT waveform at the measuring point (D).
(2) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(3) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(4) Transmit the code (F4) from the Jig RCU to adjust so that
the Y level of the V OUT waveform becomes the specified
value (G).
(5) Release the EVR mode of the VCR by transmitting the
code (F5) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
Fig.4-12-1 EE composite Y level
4.12.1.2 EE Y level
Signal
Mode
Equipment
Measuring point (D)
EVR mode
EVR address
Specified value (G) • 1.00 ± 0.02 Vp-p (terminated)
Adjustment tool (H)
(1) Observe the V OUT waveform at the measuring point (D).
(2) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(3) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(4) Transmit the code (F4) from the Jig RCU to adjust so that
the Y level of the V OUT waveform becomes the specified
value (G).
(5) Release the EVR mode of the VCR by transmitting the
code (F5) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
4.12.1.3 EE composite burst level
Signal
Mode
Equipment
Measuring point (D)
EVR mode
EVR address
Specified
value (G)
Specified value (G) • 0.30 ± 0.01 Vp-p (terminated)
Adjustment tool (H)
H. rate
(1) Observe the V OUT waveform at the measuring point (D).
(2) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(3) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(4) Transmit the code (F4) from the Jig RCU to adjust so that
the burst level of the V OUT waveform becomes the spec-
ified value (G).
(5) Release the EVR mode of the VCR by transmitting the
code (F5) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
(A1)
• Ext. input
(A2)
• Color (colour) bar signal
(B)
• EE
(C)
• Oscilloscope
• L-1 connector pin19
(F1)
• Jig code "43-95"
(F2)
• "ADJUST02 : **"
(F3)
• Jig code "43-22"
(F4)
• Jig code "43-18" or "43-19" (Channel +/-)
(F5)
• Jig code "43-3C"
• Jig RCU [PTU94023B]
Fig.4-12-2 EE Y level
(A)
• Internal colour bar
(B)
• EE
(C)
• Oscilloscope
• L-1 connector pin19
(F1)
• Jig code "43-95"
(F2)
• "ADJUST00 : **"
(F3)
• Jig code "43-20"
(F4)
• Jig code "43-18" or "43-19" (Channel +/-)
(F5)
• Jig code "43-3C"
• Jig RCU [PTU94023B]
Specified
value (G)
H. rate
(No.YD085)1-33
Advertisement
