Sony XTL-75V Service manual
XTL-75V
SERVICE MANUAL
Wireless remote commander:
RM-X63E
TV Monitor: XVM-75V
TV Tuner unit: XT-991V
• XTL-75V is composed of the following models.
TV Monitor XVM-75V
TV Tuner unit XT-991V
Wireless remote commander RM-X63E
• The TV Tuner unit (XT-991V) attached to the XTL-75V is same model as XTL-750W.
For further description, see the Service Manual of XTL-750W (9-925-662-
[][]
).
Chinese Model
TV Monitor (XVM-75V)
System Liquid crystal color display
Display Transparent TN LCD panel
Drive system TFT active matrix system
Picture size 6.5 in.; 142.6 × 80.8 mm,
165 mm
(w × h, diagonally)
Picture segment
336,960 (w 1440 × h 234)
Speaker type 35 × 20 mm dynamic speaker × 1
Power requirements
12 V DC car battery
(negative ground)
Current drain Approx. 1.0 A
Dimensions 178 × 50 × 180.7 mm (w × h × d)
Operating temperature
5˚C ~ +45˚C
Mass Approx. 2 kg
SPECIFICATIONS
TV Tuner unit (XT-991V)
Television system
CCIR I,D,K system
Color system TV: PAL
Video: PAL, NTSC
Channel converge
VHF:1 CH ~ 12 CH
UHF: 21 CH ~ 69 CH
Power requirements
12 V DC car battery
(negative ground)
Current drain Approx. 0.5 A
Output terminals
Video output: RCA pin 1 Vp-p,
75 ohm
Audio output: RCA pin –10 dBs,
10 kohm
Monitor output: Square 16 -pin
(exclusive)
Input terminals Video input (2 system): RCA pin 1 Vp-p,
75 ohm
Audio input: RCA pin –10 dBs, 10 kohm
Antenna input: mini plug
Navigation input:Square 16 -pin
(exclusive)
RCA pin:
Video 1 Vp-p, 75 ohm
Audio (monaural)
–10 dBs, 10 kohm
Dimensions 202 × 30 × 140 mm (w × h × d)
Mass Approx. 750 g
Wireless remote commander (RM-X63E)
Power requirements
AA (R6) battery × 2
Operable rangeApprox. 3 m
Dimensions 62 × 25 × 115 mm (w × h × d)
Mass Approx. 100 g
(including batteries)
Supplied accessories
Wireless remote commander
RM-X63E (1)
Design and specifications are subject to change
without notice.
MOBILE COLOR TV
SECTION 1
SERVICING NOTES
TABLE OF CONTENTS
1. SERVICING NOTES............................................... 2
2. DISASSEMBLY ......................................................... 4
3. ASSEMBLY ................................................................. 9
4. TEST MODE.............................................................. 10
5. ELECTRICAL ADJUSTMENTS......................... 11
6. DIAGRAMS
6-1. Block Diagram
– AUDIO/VIDEO/MODE CONTROL Section – .......... 15
6-2. Block Diagram
– SENSOR/MOTOR/POWER SUPPLY Section –........ 16
6-3. Note f or Printed Wiring Boards
and Schematic Diagrams ................................................ 17
6-4. Pr inted Wiring Board – B Board – ................................ 18
6-5. Schematic Diagram – B Board – ................................... 19
6-6. Pr inted Wiring Board – A Board (Side A) –.................. 20
6-7. Pr inted Wiring Board – A Board (Side B) –.................. 21
6-8. Schematic Diagram – A Board (1/3) – .......................... 22
6-9. Schematic Diagram – A Board (2/3) – .......................... 23
6-10. Schematic Diagram – A Board (3/3) – .......................... 24
6-11. Printed Wiring Boards
– SENSOR/MOTOR Section –....................................... 25
6-12. Schematic Diagram – SENSOR/MOTOR Section – .... 25
6-13. Pr inted Wiring Board – G Board – ................................ 26
6-14. Schematic Diagram – G Board – ................................... 27
6-15. Printed Wiring Board – PANEL Board – ...................... 28
6-16. Schematic Diagram – PANEL Board – ......................... 29
6-17. IC Pin Function Description ........................................... 34
7. EXPLODED VIEWS................................................ 36
8. ELECTRICAL PARTS LIST ............................... 40
PRECAUTION ON REPLACING THE B BOARD
The R999 necessary for this set is not mounted on the B board for
repair. Also, the R711 unnecessary for this set is mounted.
Therefore, when replacing the B board, add R999 and remove R711
by referring to the following.
– SCHEMATIC DIAGRAM –
Loaction: G-11
R999 0
#
R711
0
#
– PRINTED BOARD –
%
^
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
2
(XT-991V)
g
)
PRECAUTION ON HANDLING THE SET
During the manufacturing of this set, the slide gear phase has been
finely adjusted.
Therefore, never remove those screws shown in the figure when
making repairs.
two screws
screw
four screws
three screws
HOW TO PULL UP THE MONITOR BY HANDS AT POWER OFF
1. Draw out the front panel fully in the direction of the arrow 1,
and remove the shaft (stopper) from the monitor.
2. Push the slider knob (L) and slider (R) in the direction of arrow 2.
(Meshing of gear (slide L) – monitor gear (L), and gear (slide
R) – monitor gear (R) can be disengaged)
3. Pull up the monitor in the direction of arrow 3.
monitor gear (L)
ear (slide L)
monitor
shaft
(stopper)
slider knob (L)
monitor gear (R)
gear (slide R
slider knob (R)
slider knob (L)
2
1
front panel section
3
slider knob (R)
3
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
Note: Be sure to read the SERVICE NOTES before starting repairs.
SET
FRONT PANEL SECTION
(PAGE 4)
HOW TO PULL UP THE MONITOR
(PAGE 6)
COVER
(PAGE 6)
C BOARD
(PAGE 8)
MONITOR
(PAGE 8)
DC MOTOR (SMALL TYPE)
(ANGLE) (M11)
(PAGE 8)
FRONT FRAME, CHASSIS (UPPER)
(PAGE 5)
B BOARD
(PAGE 5)
HOW TO PULL UP THE MONITOR
(PAGE 6)
COVER
(PAGE 6)
A BOARD
(PAGE 7)
D BOARD, DC MOTOR (SMALL TYPE)
(SLIDE) (M21)
(PAGE 7)
Note: Follow the disassembly procedure in the numerical order given.
FRONT PANEL SECTION
3 boss
2 two screws
(M2 × 3)
1
A
6 flat cable 26P
(CN701)
3 boss
4 Remove the front panel section
in the direction of arrow A.
5 claw
2 two screws
(M2 × 3)
4
FRONT FRAME, CHASSIS (UPPER)
)
1 screw
(B2.6 × 4)
2 car mount
bracket
1 screw
(B2.6 × 4)
5 boss
4 front frame
Note: Do not pull the front
frame by force,
or it gets damaged.
1 screw
(B2.6 × 4)
6 chassis (upper)
1 screw
(B2.6 × 4)
3 five claws
1 screw
5 boss
(B2.6 × 4)
1 screw
(B2.6 × 4)
1 screw
(B2.6 × 4)
2 car mount bracket
B BOARD
Note: When removing the flat
cable (L) 26P, pull out
the front panel
but do not raise the B board
by force.
3 two flat cables (L) 26P
(CN705, 706)
5 connection cords
(CN701, 702, 703)
6 B board
4 binding
band
2 four screws
(B2.6 × 4)
2 screw
(B2.6 × 4
1 Pull the front panel ass’y.
5
HOW TO PULL UP THE MONITOR
3 After making sure the shaft (stopper)
has been removed from the monitor,
pull up the monitor in the direction of arrow C.
COVER
2 Push the slider knob (L)
in the direction of arrow B.
1 Pull the monitor base ass’y
in the direction of arrow A.
2 Open this side, as there are screws
that fix the side plate.
A
B
shaft (stopper)
C
B
2 Push the slider knob (R)
in the direction of arrow B.
1 two screws
(M2 × 3)
side plate
screw head
1 six screws
(M2 × 3)
3 Remove the cover in the
direction of arrow A.
1 two screws
(M2 × 3)
A
S102
Note: When removing or
mounting the cover,
take care not to allow the cover
to be stuck to the S102.
6
A BOARD
)
2 three connectors
(CN104, 105, 107)
1 two flat cables (L) 26P
(CN101, 102)
1 flat cable 26P
(CN109)
1 flat cable 26P
(CN401)
2 two connectors
(CN106, 108)
D BOARD, DC MOTOR (SMALL TYPE) (SLIDE) (M21)
8 two screws
(M2 × 3)
Note: When installing these screws
7 motor gear (slide)
6 D board
and DC motor, apply a drop
of screw lock G (1401B).
0 bracket (monitor motor)
3 five screws
(M2 × 4)
4 A board
Part Name Part No.
SCREW LOCK G
(1401B)
7-432-114-11
5 screw
(M2 × 3)
3 screw
(M2 × 3)
4 Remove the bracket
(monitor motor) in the
direction of the arrow.
9 DC motor (small type)
(slide) (M21)
1 screw (M2 × 3)
2 bracket (monitor stopper
7
C BOARD, MONITOR
s
5 three screws
(M2 × 3)
6 side plate
8 Remove the monitor in the
direction of arrow B.
1 flat cable 26P
(CN401)
B
2 connector
(CN11)
4 C board
DC MOTOR (SMALL TYPE) (ANGLE) (M11)
5 DC motor (small type)
(angle) (M11)
B
1 connector
(CN108)
A
7 Push the slider knob (R)
in the direction of arrow A.
3 screw (M2 × 3)
6 bracket
(monitor motor)
3 motor gear (monitor)
4 two screws
(M2 × 3)
Note: When installing these screw
and DC motor, apply a drop
of screw lock G (1401B).
Part Name Part No.
2 four screws
(M2 × 3)
SCREW LOCK G
(1401B)
7-432-114-11
8
SECTION 3
7 two screws
(M2 × 3)
6 FFC cover (2)
5
5
3 B board
4 four screws
(B2.6 × 4)
2 two flat cables (L) 26P
(CN705, 706)
4 screw
(B2.6 × 4)
B board
two flat cables (L) 26P
chassis (lower)
ass’y
Note: No slack is allowed.
filament tape 16 × 50
8 Using a filament tape 16 × 50,
stick two flat cables (L) 26P
to the chassis bottom without a slack
as shown in the figfure.
base ass’y
1 Pull the base ass’y
in the direction of arrow A.
A
Note: Follow the assembly procedure in the numerical order given.
INSTALLATION OF FLAT CABLE (L) 26P
ASSEMBLY
0 Pull the flat cable (L) 26P in the direction of arrow B,
DC motor (small type) (slide) (M21)
9 Let the flat cable (L) 26P through
and stick it to the sheet (FFC) with an adhesive tape.
B
adhesive tape
sheet (FFC)
under DC motor (small type) (slide) (M21)
as shown in the figure, and connect to
the connector (CN102).
qs screw (M2 × 3)
qa FFC cover (1)
0 Pull the flat cable (L) 26P
in the direction of arrow C,
C
and stick it to the sheet (FFC)
with an adhesive tape.
adhesive tape
sheet (FFC)
9 flat cable (L) 26P
(CN101)
9
SECTION 4
TEST MODE
Test mode setting
1. Press the [OPEN/CLOSE] button to place the set in open state.
2. Press the [V ADJ] button and [TV/VIDEO] button simultaneously.
3. A beep sounds and the test mode is activated.
Note: The test mode is active for several seconds only, and it returns to
normal state if no operation is performed during this time. When
the test mode is activated, perform the following operation immediately.
Monitor position initializing
Return the position and angle at the time of monitor open state to
the initial position set in the factory.
1. Immediately after the Test mode is activated, press the
[SEARCH --] button and [TV/VIDEO] button. (A beep will
sound)
2. Press the RESET button, and the monitor is stored and the
monitor position is initialized. (Normal state will get back)
10
MAIN SECTION
CL299
– A BOARD (Side B) –
5.35 V Adjustment
Connection:
SECTION 5
ELECTRICAL ADJUSTMENTS
digital voltmeter
A board
TP1 (5.35 V)
+
–
Adjustment Procedure:
1. Connect a digital voltmeter to the TP1 (5.35 V) on the A boar d.
2. Adjust RV501 on the A board so that digital voltmeter reading
is 5.35 V.
Inverter Standard Frequency Adjustment
Connection:
frequency counter
A board
CL299
+
–
Adjustment Procedure:
1. Connect a frequency counter to the CL299 on the A board.
2. Adjust RV502 on the A board so that frequency counter reading is 115 ± 2 kHz.
Adjustment Location:
– A BOARD (Side A) –
TP1 (5.35 V)
CN401
RV501
5.35 V
Adjustment
RV502
INVERTER
STANDARD
FREQUENCY
Adjustment
11
MONITOR SECTION
d
Equipment Used
The measuring equipment below are used for these electrical
adjustments:
• Oscilloscope
• NTSC pattern generator
• PAL pattern generator
• Regulated DC power supply
• Digital voltmeter
V COM Amplitude/Bias Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect an oscilloscope to TP (COM) on the G board.
3. V COM Amplitude Adjustment
Adjust R V401 so that the amplitude of the output wav eform is
6.0 V.
4. V COM Bias Adjustment
Adjust R V409 so that the lev el A of the output waveform is a t
4.3 V DC.
Connection of Equipment
Unless otherwise specified, the measuring equipment should be
connected as shown below:
INPUT (1)
(VIDEO)
jack
NTSC pattern
generator
VIDEO OUT
(75 Ω)
parking brake terminal
(Connected to ground)
TV tuner unit
XT-991V
MONITOR
OUT jack
Connection
cord
ACC cord
TV monitor
XVM-75V
ACC cor
regulated DC
power supply
(DC 14.4 V)
+
–
Setup at Adjustment
1. Press the
[SEL] button of the wireless remote commander, set
the image quality of the set to “VISUAL STD”.
2. The adjustment signal is a 5-step gray scale signal from a NTSC
pattern generator.
Input the gray scale signal into the tuner unit and connect an
oscilloscope to TP415 on the G board. Check that the width
between the black and white levels of the gray scale signal is
0.74 Vp-w.
white
0.74 Vp-p
A
6.0 Vp-p
0 V
Adjustment Location: See page 13.
RGB Amplitude Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect a oscilloscope to TP (G) on the G board.
3. Adjust RV406 so that the white and the next step of pedestal
are on the same level.
pedestal
white
white
pedestal
Adjustment Location: See page 13.
γ 0 Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect an oscilloscope to TP (G) on the G board.
3. Adjust RV407 so that the third step fr om the bottom becomes
1.2 V.
black
Bright Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect a digital voltmeter to TP (BRIGHT) on the G board.
3. Adjust RV405 so that the reading on the digital voltmeter is
2 V.
Adjustment Location: See page 13.
12
1.2 V
GND
Adjustment Location: See page 13.
γ 2 Adjustment
1.2 V
GND
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect a oscilloscope to TP (G) on the G board.
3. Adjust RV408 so that the white level becomes 3.6 V.
3.6 V
B Sub Bright Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect a oscilloscope to TP (B) on the G board.
3. Adjust RV404 so that the third step from the bottom becomes
1.2 V.
GND
R Sub Bright Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect a oscilloscope to TP (R) on the G board.
3. Adjust RV403 so that the third step fr om the bottom becomes
1.2 V.
1.2 V
GND
Adjsutment Location:
RV401
V COM
AMPLITUDE
Adjustment
RV404
B SUB
BRIGHT
Adjustment
RV406
RGB
AMPLITUDE
Adjustment
RV408
γ 2
Adjustment
– G BOARD (Side A) –
RV403
R SUB BRIGHT
Adjustment
TP (BRIGHT)
TP (COM)
C424
TP (R)
TP (G)
RV409
V COM BIAS
Adjustment
TP (B)
Note:
After all adjustments finished, enter connect the PAL pattern generator to
check that a picture appears.
RV405
BRIGHT
Adjustment
RV407
γ 0
Adjustment
– G BOARD (Side B) –
TP415
13
MEMO
14
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