Sony XAV-77 Service Manual ▷ View online
XAV-77
13
3-7.
MONITOR
3-8.
MONITOR (F)/(R) CABINET ASSY
2
six screws (BTP2.6
×
6)
3
flat 40P cable (CN201)
5
monitor
1
Pull the monitor.
4
ground sheet (A) (CN202)
0
monitor (R) cabinet assy
1
three screws (2
×
6)
2
three screws (2
×
6)
6
flexible board (CN401)
7
connector (CN205)
3
two claws
9
monitor (F) cabinet assy
4
two claws
5
flat cable 10P (CN202)
8
connector (CN601)
XAV-77
14
3-9.
LCD
3-10. MONITOR BOARD
2
LCD
1
two claws
1
two claws
3
three PCB retainers
3
two PCB retainers
1
connector (CN301)
4
monitor board
2
three screws (2
×
6)
2
two screws (2
×
6)
XAV-77
15
SECTION 4
ASSEMBLY
Note:
Follow the assembly procedure in the numerical order given.
4-1.
ASSEMBLY OF FLAT CABLE
250
150
flexible retainer
3
It lets flat cables pass
in two holes of flexible retainer.
in two holes of flexible retainer.
2
flat cable 16P
1
flat cable 40P
Note: Turn the point-of-contact side up, bend to
Note: Turn the point-of-contact side up, bend to
a valley type in a 250 mm portion,
and make a crease.
and make a crease.
Note: Turn the point-of-contact side up, bend to
a valley type in a 150 mm portion,
and make a crease.
and make a crease.
sheet (tape)
4
Two cables are turned up
in a fold portion and
stuck with a sheet (tape).
in a fold portion and
stuck with a sheet (tape).
5
Pass the ground sheet (A) as
shown in a figure.
shown in a figure.
6
Bent a flexible retainer
as shown in a figure.
as shown in a figure.
8
two screws
(M2
(M2
×
2.3)
7
flexible retainer
9
sheet (tape)
16
XAV-77
7.5V ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect a digital voltmeter to the TP58 on the MONITOR
1. Connect a digital voltmeter to the TP58 on the MONITOR
board.
2. Adjust the RV501 so that the reading of digital voltmeter is
7.50
± 0.04 V.
INVERTER VOLTAGE ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect a digital voltmeter to the TP64 on the MONITOR
1. Connect a digital voltmeter to the TP64 on the MONITOR
board.
2. Adjust the RV602 so that the reading of digital voltmeter is
6.80
± 0.04 V.
γ
2 ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect a digital voltmeter to the TP67 on the MONITOR
1. Connect a digital voltmeter to the TP67 on the MONITOR
board.
2. Adjust the RV213 so that the reading of digital voltmeter is
2.50
± 0.04 V.
EQUIPMENT USED
Use the following measuring equipment for the electrical
adjustment.
• Set (XAV-77)
• Connection box (XA-114)
• NTSC/PAL pattern generator
• Oscilloscope
• Frequency counter
• Digital voltmeter
• Regulated power supply
adjustment.
• Set (XAV-77)
• Connection box (XA-114)
• NTSC/PAL pattern generator
• Oscilloscope
• Frequency counter
• Digital voltmeter
• Regulated power supply
SETUP FOR ADJUSTMENT
1. Open the monitor, and press the
[MENU]
button on the wireless
remote commander (RM-X118), and select the “MONITOR
TUNE” with the
TUNE” with the
M
DISC +
or
m
DISC –
button. Then, select
the “COLOR”, “HUE” with the
M
DISC +
or
m
DISC –
button,
and set the COLOR and HUE to the standard setting by pressing
the
the
[ENTER]
button for more than 2 seconds respectively.
2. For the monitor adjustment, use the 5-step gray scale signal
(chroma off) obtained from the pattern generator. Enter the
gray scale signal to the connection box (XA-114) and connect
an oscilloscope to the TP154 on the MONITOR board. Check
that the voltage between black and white of the gray scale signal
is 0.74Vp-p.
gray scale signal to the connection box (XA-114) and connect
an oscilloscope to the TP154 on the MONITOR board. Check
that the voltage between black and white of the gray scale signal
is 0.74Vp-p.
DC/DC FREQUENCY ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect a frequency counter to the TP88 on the MONITOR
1. Connect a frequency counter to the TP88 on the MONITOR
board.
2. Adjust the RV900 so that the reading of frequency counter is
165
± 0.5 kHz.
5V ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect a digital voltmeter to the TP57 on the MONITOR
1. Connect a digital voltmeter to the TP57 on the MONITOR
board.
2. Adjust the RV503 so that the reading of digital voltmeter is
5.00
± 0.04 V.
SECTION 5
ELECTRICAL ADJUSTMENTS
white
black
0.74Vp-p
+
–
–
TP152 (GND)
TP88
set
(XAV-77)
frequency
counter
digital
voltmeter
TP152 (GND)
TP57
set
(XAV-77)
+
–
–
degital
voltmeter
TP152 (GND)
TP58
set
(XAV-77)
+
–
–
+
–
–
degital
voltmeter
TP152 (GND)
TP64
set
(XAV-7W)
+
–
–
degital
voltmeter
NTSC/PAL pattern
generator
TP152 (GND)
TP67
set
(XAV-77)
connection box
(XA-114)
INPUT1
VIDEO jack
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