Sony XAV-722 / XAV-72BT / XAV-E722 Service Manual ▷ View online
XAV-72BT/722/E722
25
3-14. CHASSIS (T612Z) SUB ASSY, SENSOR BOARD
3-13. SERVO BOARD
Note 1: Adhesive (ST-854GH) 10
× 33 m tape cannot re-used.
Please replace to brand-new part ones adhesive (ST-854GH) 10
× 33 m tape is removed.
– DVD mechanism deck block (Bottom view) –
2
Remove the two solders
of loading motor wire.
8
SERVO board
SERVO board
RED
WHITE
6
three screws
(M1.7
u 2.5)
4
OP flexible board
(CN2)
3
cord with connector
5
sled motor flexible board
(CN1)
7
1
adhesive (ST-854GH)
10
u 33 m tape
1
adhesive (ST-854GH)
10
u 33 m tape
1
adhesive (ST-854GH)
10
u 33 m tape
Note 2: When disconnecting the OP flexible board from
of the connector. Be sure to refer to “NOTE FOR
FLEXIBLE BOARD OF THE OPTICAL PICK-UP”
of the servicing notes (See page 5).
2
Remove the five solders
of cord with connector and
SENSOR board wire.
SERVO board
RED
RED
WHITE
WHITE
BLACK
1
two screws
(P1.7
u 2.2)
4
chassis (T612Z) sub assy
1
two screws
(P1.7
u 2.2)
2
claw
3
claw
5
Remove the three solders.
6
SENSOR borad
XAV-72BT/722/E722
26
3-15. CHASSIS (OP, ZA) COMPLETE ASSY
A
5
1
OP flexible board
(CN2)
6
two coil springs
(damper)
8
chassis (OP, ZA) complete assy
7
compression spring
(damper, Z)
2
flexible board
(CN1)
3
tension spring (KF)
tension spring (KF)
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4
Turn the gear (RA1) fully
in the direction of arrow A.
Hang in order of
A, B by pay
attention spring of direction.
A
B
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XAV-72BT/722/E722
27
SECTION 4
ELECTRICAL ADJUSTMENTS
MONITOR SECTION
If any of the following parts was replaced, execute the “V-COM
Adjustment” and “Flicker Adjustment” as mentioned below.
• Complete AUDIO board
• AUDIO board: IC504
• Complete VISUAL board
• VISUAL board: IC2001
• Liquid crystal display panel (LCD1401)
• Complete LCD board
Adjustment” and “Flicker Adjustment” as mentioned below.
• Complete AUDIO board
• AUDIO board: IC504
• Complete VISUAL board
• VISUAL board: IC2001
• Liquid crystal display panel (LCD1401)
• Complete LCD board
1. SETTINGS
1-1. Tools and measuring devices for adjustment
1-1. Tools and measuring devices for adjustment
Tools and measuring devices
Item used
PC
(The one with serial port. The USB-
RS232C conversion is available.)
(The one with serial port. The USB-
RS232C conversion is available.)
V-COM adjustment and
Flicker adjustment
Flicker adjustment
Communication software
(Hyper Terminal etc.)
Serial cable for RS232C
(Cross cable)
RS232C-JIG OVERALL ASSY
(Part No. A-1777-380-A)
Oscilloscope
(Hyper Terminal etc.)
Serial cable for RS232C
(Cross cable)
RS232C-JIG OVERALL ASSY
(Part No. A-1777-380-A)
Oscilloscope
V-COM adjustment
RS232C-JIG OVERALL ASSY
1-2. Serial port setting
Please setting it as follows.
Please setting it as follows.
1-3. Connection with unit
Procedure:
1. Four screws in the back of the unit are removed, and the brack-
Procedure:
1. Four screws in the back of the unit are removed, and the brack-
et back is detached.
2. The 5pin cable is connected with the second the connector
from the left.
3. The switch of RS232C-JIG OVERALL ASSY is “L”.
4. The communication software is start up.
5. Turn on the main power of unit.
5. Turn on the main power of unit.
The following log is displayed when starting while connected.
xxxxx Visual Ver[**** ] xxxxx
Techwell Mode
Data Read Format : ‘r 005A’+ [Enter]
Data Write Format: ‘w 01C4 03’+ [Enter]
Techwell Mode
Data Read Format : ‘r 005A’+ [Enter]
Data Write Format: ‘w 01C4 03’+ [Enter]
DAC Mode
Data Read Format : ‘dr0’+ [Enter]
Data Write Format: ‘dw1 7D’+ [Enter]
Data Read Format : ‘dr0’+ [Enter]
Data Write Format: ‘dw1 7D’+ [Enter]
Gerda WB Adjust (TestMode5 only)
Read Drive Value : ‘grd’+’r / g / b’ [Enter]
Write Drive Value : ‘gwd’+’r / g / b’+’value(hex)’ [Enter]
Read CutOff Value : ‘grc’+’r / g / b’ [Enter]
Write CutOff Value : ‘gwc’+’r / g / b’+’value(hex)’ [Enter]
Read Drive Value : ‘grd’+’r / g / b’ [Enter]
Write Drive Value : ‘gwd’+’r / g / b’+’value(hex)’ [Enter]
Read CutOff Value : ‘grc’+’r / g / b’ [Enter]
Write CutOff Value : ‘gwc’+’r / g / b’+’value(hex)’ [Enter]
Flash Write
Save Data to Flash : ‘ds’+ [Enter]
Clear Flash Data : ‘dc’+ [Enter]
Save Data to Flash : ‘ds’+ [Enter]
Clear Flash Data : ‘dc’+ [Enter]
****: Version display
CN2002 on the
VISUAL board
VISUAL board
H
moL
XAV-72BT/722/E722
28
2. V-COM ADJUSTMENT
Procedure:
1. The setting of “1. SETTINGS” is completed.
2. Connect an oscilloscope to TP1401 (VCOM) and TP1402
Procedure:
1. The setting of “1. SETTINGS” is completed.
2. Connect an oscilloscope to TP1401 (VCOM) and TP1402
(GND) on the LCD board.
Check Location:
3. Adjust by using the communication software so that the
waveform level of oscilloscope becomes 5.6 ± 0.1 V as fol-
lows.
lows.
4. “dr1” is input by the communication software and “Enter” key
is pressed.
The following numerical value returns from the unit.
“Read Channel1:0x**”
**: Hexadecimal (“00” to “FF”)
5. To change the adjusted value, “dw1 ##” is input by the com-
munication software and “Enter” key is pressed.
The following numerical value returns from the unit.
“Write Channel1:0x##”
##: Hexadecimal (“00” to “FF”)
When waveform level is smaller than 5.6 V, the numerical
value of “##” is increase.
value of “##” is increase.
When waveform level is larger than 5.6 V, the numerical value
of “##” is decrease.
of “##” is decrease.
6. “ds” is input by the communication software and “Enter” key
is pressed and the numerical value is saved.
7. The “Reset” button is pressed and turn the power off.
Example:
When the returning numerical value “8a” and the waveform level
is 5.4 V.
The numerical value is increased, and adjusted for a waveform lev-
el to become 5.6 ± 0.1 V with “8b→8c→8d→8e→8f→90→91...”.
When the returning numerical value “8a” and the waveform level
is 5.4 V.
The numerical value is increased, and adjusted for a waveform lev-
el to become 5.6 ± 0.1 V with “8b→8c→8d→8e→8f→90→91...”.
dr1
Read Channel1:0x8a
dw1 8b
Write Channel1:0x8b
dw1 8c
Write Channel1:0x8c
dw1 8d
Write Channel1:0x8d
ds
Read Channel1:0x8a
dw1 8b
Write Channel1:0x8b
dw1 8c
Write Channel1:0x8c
dw1 8d
Write Channel1:0x8d
ds
←Reading of default value.
←Default value.
←The numerical value is in-
creased and confi rm.
←Default value.
←The numerical value is in-
creased and confi rm.
←Enters the range of
←The numerical value is saved.
←The numerical value is saved.
3. FLICKER ADJUSTMENT
Procedure:
1. The setting of “1. SETTINGS” is completed.
2. Input the PAL white 40% raster signal from AUX2 VIDEO IN
Procedure:
1. The setting of “1. SETTINGS” is completed.
2. Input the PAL white 40% raster signal from AUX2 VIDEO IN
jack on the VISUAL board.
3. In the state of source off, press the [4] → [5] → [4] (keeps
pressing) button on the remote commander.
The test mode 4 starts, and the following screen is displayed on
the monitor.
the monitor.
4. “dr0” is input by the communication software and “Enter” key
is pressed.
The following numerical value returns from the unit.
“Read Channel0:0x**”
**: Hexadecimal (“00” to “FF”)
5. To change the adjusted value, “dw0 ##” is input by the com-
munication software and “Enter” key is pressed.
The following numerical value returns from the unit.
“Write Channel0:0x##”
##: Hexadecimal (“00” to “FF”)
Adjust so that the fl icker becomes minimum in the sight.
6. “ds” is input by the communication software and “Enter” key
is pressed and the numerical value is saved.
7. The “Reset” button is pressed and turn the power off.
Example of characteristic:
JL1401
(VCOM)
JL1402
(GND)
– LCD Board (Side B) –
5.6
± 0.1Vp-p
Flicker
Setting value (decimal)
bad
o
m
good
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