Electrical Adjustments - Sony XAV-A1 Service Manual

ELECTRICAL ADJUSTMENTS

VOLTAGE ADJUSTMENT
Setting:
digital voltmeter
LCD board
U1/U6/R1054/R1115
U7
Procedure:
1. Connect a digital voltmeter to the U6 and U7 on the LCD
board.
2. Adjust the SVR1001 on the LCD board so that the value of
digital voltmeter becomes +5.4 V ± 0.05 V.
3. Connect a digital voltmeter to the R1115 and U7 on the LCD
board.
4. Confirm that the value of digital voltmeter is +5.0 V ± 0.1 V.
5. Connect a digital voltmeter to the U1 and U7 on the LCD
board.
6. Adjust the SVR1002 on the LCD board so that the value of
digital voltmeter becomes –14.0 V ± 0.1 V.
7. Connect a digital voltmeter to the R1054 and U7 on the LCD
board.
8. Confirm that the value of digital voltmeter is +14.5 V ± 0.5 V.
Adjustment and Connection Location: LCD board
TOUCH PANEL ADJUSTMENT
Note: After the end of voltage adjustment, this adjustment is performed.
Procedure:
1. Turn the power on and set th FM mode.
2. Press the [OPEN/CLOSE] button to open the monitor.
3. Touch in order of [SOURCE], [MENU], [OTHER] and [Touch
Panel Adjust] on the monitor to display three points on the
monitor.
4. Touch in order of point [1], [2] and [3] on the monitor.
SETTING THE TEST MODE
Procedure:
1. Turn the power on and press the [OPEN/CLOSE] button to open
the monitor.
2. Press the [OFF] button to set the OFF state.
3. Press the [SOURCE] and [SEEK +] buttons simultaneously for
several seconds.
4. When test mode is activated, "Picture" is displayed on the
monitor and segments of sub display all lit.
BASIC OPERATIONS OF THE TEST MODE
The functions of these buttons are as follows.
Button Function
[SEEK +]/[SEEK ---] button
Proceeding and return of adjustment item*
[VOL +]/[VOL ---] button Increase and decrease of adjustment value
Writing of adjustment value and releasing
[OFF] button
of test mode
* The adjustment item switches as follows whenever the [SEEK +]/[SEEK ---]
button is pressed; ··· ↔ Picture ↔ Color ↔ Tint(HUE) ↔ Phase ↔ Cont-
↔ Cont-RGB1 ↔ Cont-RGB2 ↔ GAMMA 1 ↔ GAMMA 2↔
Video
RGB AMP. ↔ Bright ↔ SUB-Bright-R ↔ SUB-Bright-B ↔ COM-Amp.
↔ Flicker-NTSC ↔ Flicker-PAL ↔ ···.
XAV-A1
SECTION 4
MONITOR ADJUSTMENT
Setting:
oscilloscope
(DC range)
LCD board
IC1033 pin qs /CN1010 pin 1
U7
Procedure:
1. Connect a TV SSG to the AUX3 jack on the MAIN board.
2. Input 10 steps signal (chroma off, NTSC composite video)
from AUX3 jack on the MAIN board.
3. Connect an oscilloscope to the IC1033 pin qs and U7 on the
LCD board.
4. Set the test mode and press the [SEEK +]/[SEEK ---] button to
select the "RGB AMP.".
5. Adjust the [VOL +]/[VOL ---] button so that the A level of the
waveform on the oscilloscope becomes 5.0 V ± 0.05 V. (Vb-b
adjustment)
6. Press the [SEEK +]/[SEEK ---] button to select the "Cont-Video".
7. Adjust the [VOL +]/[VOL ---] button so that the B level of the
waveform on the oscilloscope becomes 4.8 V to 4.9 V. (Vb-w
adjustment)
8. Press the [SEEK +]/[SEEK ---] button to select the "Bright ".
9. Adjust the [VOL +]/[VOL ---] button so that the C level of the
waveform on the oscilloscope becomes 2.1 V ± 0.05 V.
(Gamma adjustment)
10. Repeat the step 6 to 9 several times to become specified voltage.
GND
C B
11. Connect an oscilloscope to the CN1010 1 pin and U7 on the
LCD board.
12. Press the [SEEK +]/[SEEK ---] button to select the "COM-Amp.".
13. Adjust the [VOL +]/[VOL ---] button so that the D level of the
waveform on the oscilloscope becomes 5.6 V ± 0.1 V. (VCOM
adjustment)
14. Insert the DVD test disc and play the track No. 5.
DVD test disc:
HLX-504 (Part No.: J-6090-088-A) (single layer) (NTSC)
HLX-505 (Part No.: J-6090-089-A) (dual layer) (NTSC)
HLX-506 (Part No.: J-6090-077-A) (single layer) (PAL)
HLX-507 (Part No.: J-6090-078-A) (dual layer) (PAL)
15. Connect an oscilloscope to the IC1033 pin qs and U7 on the
LCD board.
16. Press the [SEEK +]/[SEEK ---] button to select the "Cont-RGB1".
17. Adjust the [VOL +]/[VOL ---] button so that the E level of the
waveform on the oscilloscope becomes 4.8 V ± 0.05 V. (DVD
adjustment)
18. Press the [OFF] button to write the adjustment value and release
the test mode.
+
–
GND
Connection Location: LCD board
FLICKER ADJUSTMENT
Adjustment and Connection Location:
A
D
23 23
Procedure:
1. Connect a TV SSG to the AUX3 jack on the MAIN board.
2. Input 10 steps signal (chroma off, NTSC composite video)
from AUX3 jack on the MAIN board.
3. Set the test mode and press the [SEEK +]/[SEEK ---] button to
select the "Flicker-NTSC". (Afterwards, hold the state for 30
minutes or more)
4. Give a shock to the set, adjust the [VOL +]/[VOL ---] button so
that the flicker becomes minimum in the sight.
5. Input 10 steps signal (chroma off, PAL composite video) from
AUX3 jack on the MAIN board.
6. Set the test mode and press the [SEEK +]/[SEEK ---] button to
select the "Flicker-PAL".
7. Give a shock to the set, adjust the [VOL +]/[VOL ---] button so
that the flicker becomes minimum in the sight.
8. Press the [OFF] button to write the adjustment value and release
E
the test mode.
SVR1001
CN1010
5 1
8 7
IC1033
14 1
U6
U7
XAV-A1
R1115
U1
SVR1002
R1054