Sony XAV-7W Service Manual ▷ View online
17
XAV-7W
A
γ
0 ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect a digital voltmeter to the TP65 on the MONITOR
1. Connect a digital voltmeter to the TP65 on the MONITOR
board.
2. Adjust the RV212 so that the reading of digital voltmeter is
2.51
± 0.04 V.
RGB AMP ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect an oscilloscope to the TP77 on the MONITOR board.
2. Adjust the RV208 so that the A level of the waveform on the
1. Connect an oscilloscope to the TP77 on the MONITOR board.
2. Adjust the RV208 so that the A level of the waveform on the
oscilloscope is 4.80
± 0.04 V.
+
–
–
degital
voltmeter
NTSC pattern
generator
TP152 (GND)
TP65
set
(XAV-7W)
connection box
(XA-114)
INPUT1
VIDEO jack
+
–
–
NTSC pattern
generator
TP152 (GND)
TP77
set
(XAV-7W)
connection box
(XA-114)
osclloscope
INPUT1
VIDEO jack
BRIGHT ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect an oscilloscope to the TP77 on the MONITOR board.
2. Adjust the RV201 so that the B level of the waveform on the
1. Connect an oscilloscope to the TP77 on the MONITOR board.
2. Adjust the RV201 so that the B level of the waveform on the
oscilloscope is 4.20
± 0.04 V.
V COM, V COM CENTER ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect an oscilloscope to the TP108 on the MONITOR board.
1. Connect an oscilloscope to the TP108 on the MONITOR board.
– V COM ADJUSTMENT –
2. Adjust the RV210 so that the C level of the waveform on the
2. Adjust the RV210 so that the C level of the waveform on the
oscilloscope is 8.40
± 0.05 V.
– V COM CENTER ADJUSTMENT –
3. Adjust the RV211 so that the D level of the waveform on the
3. Adjust the RV211 so that the D level of the waveform on the
oscilloscope is –2.40
± 0.05 V.
B
+
–
–
NTSC pattern
generator
TP152 (GND)
TP77
set
(XAV-7W)
connection box
(XA-114)
osclloscope
INPUT1
VIDEO jack
+
–
–
NTSC pattern
generator
TP152 (GND)
TP108
set
(XAV-7W)
connection box
(XA-114)
osclloscope
INPUT1
VIDEO jack
C
0V
D
18
XAV-7W
FREE-RUN FREQUENCY ADJUSTMENT
Connection:
Adjusting Procedure:
1. Place the monitor in the no signal input status.
2. Connect a frequency counter to the TP70 on the MONITOR
1. Place the monitor in the no signal input status.
2. Connect a frequency counter to the TP70 on the MONITOR
board.
3. Press the
[SOURCE]
button to activate the video mode.
4. Adjust the RV402 so that the reading of frequency counter is
15.37
± 0.02 kHz.
H CENTER ADJUSTMENT
Connection:
Adjusting Procedure:
1. Enter the monoscope (NTSC) signal from the pattern generator.
2. Press the
1. Enter the monoscope (NTSC) signal from the pattern generator.
2. Press the
[SOURCE]
button to activate the video mode so as
to display the monoscope on the monitor screen.
3. Adjust the RV401 so that the monoscope on the monitor screen
is horizontally symmetric.
+
–
–
TP152 (GND)
TP70
set
(XAV-7W)
frequency
counter
NTSC pattern
generator
INPUT1
VIDEO jack
set
(XAV-7W)
connection box
(XA-114)
B SUB BRIGHT ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect an oscilloscope to the TP78 on the MONITOR board.
2. Adjust the RV209 so that the E level of the waveform on the
1. Connect an oscilloscope to the TP78 on the MONITOR board.
2. Adjust the RV209 so that the E level of the waveform on the
oscilloscope is 4.00
± 0.05 V.
R SUB BRIGHT ADJUSTMENT
Connection:
Adjusting Procedure:
1. Connect an oscilloscope to the TP76 on the MONITOR board.
2. Adjust the RV207 so that the F level of the waveform on the
1. Connect an oscilloscope to the TP76 on the MONITOR board.
2. Adjust the RV207 so that the F level of the waveform on the
oscilloscope is 4.40
± 0.05 V.
CHECKINIG AFTER ADJUSTMENT
Enter color bars from the pattern generators for both NTSC and
PAL signal systems to check that there is no problem in the liquid
crystal display of the monitor in both signal systems.
PAL signal systems to check that there is no problem in the liquid
crystal display of the monitor in both signal systems.
+
–
–
NTSC pattern
generator
TP152 (GND)
TP78
set
(XAV-7W)
connection box
(XA-114)
osclloscope
INPUT1
VIDEO jack
E
0V
NTSC pattern
generator
TP152 (GND)
TP76
set
(XAV-7W)
connection box
(XA-114)
–
osclloscope
INPUT1
VIDEO jack
+
F
0V
19
XAV-7W
– MONITOR BOARD (Component Side) –
TP108
TP70
TP154
TP76
TP78
TP57
TP58
TP88
TP64
TP77
TP65
TP67
TP152
(GND)
(GND)
Connecting and Adjustment Location:
– MONITOR BOARD (Conductor Side) –
RV503
5V Adjustment
RV900
DC/DC Frequency Adjustment
RV401
H Center Adjustment
RV402
Free-run Frequency Adjustment
RV208
RGB AMP
Adjustment
RV210
Bright
Adjustment
RV207
R Sub Bright
Adjustment
RV501
7.5V
Adjustment
RV602
Inverter Voltage
Adjustment
RV211
V COM Center
Adjustment
RV212
γ
0
Adjustment
RV213
γ
2
Adjustment
RV209
B Sub Bright Adjustment
RV210
V COM Adjustment
XAV-7W
21
21
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – MAIN Section –
SDA
SCL
S MUTE
AM IF
10
MPX1
12
IIC BUS
DIGITAL
CONTROL
17
MP IN
19 20
R-CH
R-CH
R-CH
OUTSW
PILOT
CANCELATION
AM/FM NOISE
BLANKER
D/A
CONVERTER
DEMODULATOR
STEREO ADJUST
STEREO BLEND
HIGH-
CUT
LPF
PILOT DET
LPF
QUAL
S & H
PLL
LEVEL
14
13
QUALITY
16
PULSE
FORMER
44
38
33
R-CH
FRONT
AUDIO OUT
REAR
AUDIO OUT
MUTING
Q312-2
MUTING
Q311-2
MUTING
Q312-1
MUTING
Q311-1
MUTING
Q310
IN1
OUT1+
2
CN901 (1/2)
POWER AMP
IC171
FL+
IN2
IN3
IN4
14
15
12
11
22
4
OUT1–
1
FL–
OIT2+
3
FR+
OUT2–
4
FR–
OUT3+
10
RL+
OUT3–
9
RL–
OUT4+
11
RR+
OUT4–
12
14
15
7
13
RR–
SBRK
ACC
ATT
ILL
AUX
10
MUTE
ST-BY
BEEP
ST-BY
9
7
5
17
19
21
23
3
15
55
SUB OUT
INPUT
MULTIPLEXER
LOUDNESS
VOLUME
TONE
CONTROL
OUTPUT
SELECTOR
SUB WOOFER
FILTER
SOFT STEP
FADER
MIXER
SOFT
MUTE
I2C-SDA
I2C-SCL
CN3
1
3
(R)
(L)
(R)
(L)
(R)
(L)
SIDEBRK 58
ACCIN 81
TEL ATT 117
ILL-IN 95
70
X0
92
X1
93
71
ACCESSORY CHECK
Q910
LEVEL SHIFT
Q906
ILLUMINATION
CHECK
Q904
BATTERY OFF
MUTE DRIVER
Q306
MUTING
CONTROL SWITCH
Q307
MUTING
CONTROL SWITCH
Q301
D310
BACK-UP B+
D15
D311
28
27
OUTLF
OUTLR
AU-L
AM
23
SPECTRUM
ANALYZER
21
LOW-PASS
FILTER
IC101
B
SA DATA,
SA CLK
SA CLK
SA CLK
SA DATA
SA OUT
INPUT SELECT, FM MPX
ELECTRICAL VOLUME
IC302
D314
ATT
5
SOFT STEP
FADER
24
6
4
7
9
D909-2
SCL
SDA
X452
3.58MHz
X0A
74
X1A
73
X701
32.768kHz
RC-IN1
72
RC-IN0
48
KEYIN2
49
KEYIN1
47
KEY ACK
79
AD-ON
80
J901
(REMOTE IN)
KEY ACTIVE
SWITCH
Q912
BU
+5V
BU
+5V
D316
D909-1
(Page 22)
• SIGNAL PATH
: FM
: AM
: AUDIO
• R-ch is omitted due to same as L-ch.
ACOUT L
ACIN L
D11
D908
13
2
CN2 (2/7)
AU-L
AU-R
FROM
CONNECTION
BOX
SW108
OPEN/
CLOSE
SW101 – 105, 107,
SW750, 751
SW106, 108
KEYIN0
46
LSW965 – 967
OPNCLS
61
105
DESTSEL2
FM 50 kHz
AM 9 kHz
FM 200 kHz
AM 10 kHz
S1
FREQUENCY
SELECT
(E)
MASTER CONTROLLER
IC703 (1/4)
TUNER UNIT
TU2
(ANTENNA IN)
TU +8.5V
TU +5V
BU +5V
SDA
SCL
9
53
S-METER
10
TROM-SDA
11
TROM-SCL
A
(Page 24)
RESET
18
17
CN2 (1/7)
SDA
SCL
TO
CONNECTION
BOX
SCL
SDA
ADSO
CONTROL SWITCH
IC9
ADSO1
ADSO2
ADSO1
ADSO1 35
ADSO2 36
ADSO2
2
1
ANT-AM
ANT-FM
5
VCC (8.5V)
16
VDD (5V)
11
VDD E2P (5V)
SDA (I2CBUS)
SCL (I2CBUS)
12 13
14
S-METER
17
SDA (E2PROM)
18
SCL (E2PROM)
SDA
SCL
12 13
10
MPX
8
AM-DET
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