Sony XTL-W70 Service Manual ▷ View online
13
XTL-W70
• Use the following equipment for the electrical adjustment.
Equipment
1
Monitor TV (XVM-W71, etc.)
2
Spectrum analyzer
3
TV signal generator
4
Digital voltmeter
5
Oscilloscope
6
Audio analyzer
7
DC power supply
8
Frequency counter
Equipment Connections
Connect the test equipment as shown in the figure below (unless
otherwise instructed) and perform the adjustment.
otherwise instructed) and perform the adjustment.
VCO Adjustment
Procedure:
1. No connection to ANT IN. (no signal state)
2. Connect a resistor (10 k
1. No connection to ANT IN. (no signal state)
2. Connect a resistor (10 k
Ω
) between TP33 and +9 V (TP35).
3. Connect a spectrum analyzer to TP34 (with DC cut by a
capacitor (0.01 µF)).
4. Adjust T3 so that the waveform peak is 45.75 MHz ± 1 kHz.
5. After this adjustment, open TP34. (Disconnect the spectrum
5. After this adjustment, open TP34. (Disconnect the spectrum
analyzer.)
45.75 MHz
0.7 V
0.3 V
0.3 V
red
white (approx. 100%)
horizontal sync. signal
burst signal (flat)
TV SG
set
POWER (CN4)
RF out
ANT IN
DC
power supply
power supply
TUNER UNIT SECTION
Color bar signal from TV signal generator
Setup during Adjustment
Use the video signal obtained from the TV signal generator as the
alignment signal, and check that this signal is within video output
signal standards.
alignment signal, and check that this signal is within video output
signal standards.
Connection points: See page 14.
Adjustment points: See page 14.
Adjustment points: See page 14.
2.5 Vp-p
0 V
Note:
Small peaks (dips) coming out from the top of the
waveform are unacceptable.
waveform are unacceptable.
RGB Decoder FO Adjustment
Procedure:
1. Without INPUT1, INPUT2 inputs (no signal input mode), short
1. Without INPUT1, INPUT2 inputs (no signal input mode), short
the jumper wire between TP100 and GND.
2. Connect a frequency counter to TP61.
3. Adjust VR6 so that reading on frequency counter is
3. Adjust VR6 so that reading on frequency counter is
3.579545 MHz ± 100 Hz.
4. After this adjustment, remove the jumper wires.
AGC Adjustment
Procedure:
1. Set the TV SYSTEM switch to 1.
2. Input a color bar signal of 10ch (193.25 MHz) and 66 dBµV
1. Set the TV SYSTEM switch to 1.
2. Input a color bar signal of 10ch (193.25 MHz) and 66 dBµV
(75
Ω
OPEN).
3. Connect the digital voltmeter to TP42.
4. Adjust VR1 so that reading on the digital voltmeter is
4. Adjust VR1 so that reading on the digital voltmeter is
3.0 ± 0.1 V.
AFT Adjustment
Procedure:
1. Input a color bar signal of 10ch (193.25 MHz) and 74 dBµV
1. Input a color bar signal of 10ch (193.25 MHz) and 74 dBµV
(75
Ω
OPEN).
2. Connect the oscilloscope to TP102.
3. Adjust T3 untill the waveform on the oscilloscope is 2.5 Vp-p.
3. Adjust T3 untill the waveform on the oscilloscope is 2.5 Vp-p.
14
XTL-W70
T3: VCO Adjustment
: AFT Adjustment
: AFT Adjustment
VR1: AGC Adjustment
VR6: RGB Decoder FO Adjustment
VR4: RGB Decoder
input Level Adjustment
input Level Adjustment
TP100
TP61
TP102
TP42
TP30
TP34
TP33
white
blue
SYNC
TP111
1
2
4
3
RGB Decoder Input Level Adjustment
Procedure:
1. Input signal : PAL EBU color bar (INPUT 1 VIDEO)
2. Adjust VR4 so that the white peak 1 (100% white) of
1. Input signal : PAL EBU color bar (INPUT 1 VIDEO)
2. Adjust VR4 so that the white peak 1 (100% white) of
TP111 (B OUT) is at 1.0 Vp-p.
Connection Points and Adjustment Points:
15
15
XTL-W70
4-1. BLOCK DIAGRAM — MONITOR SECTION —
SECTION 4
DIAGRAMS
42
41
40
26
36
34
6
INT/
EXT
SW
SYNC
SEP
BGP
GEN
GEN
PAL/NTSC
CONTROL
Q910
GAMMA
AMP
AMP
INV
19
21
24
RV405
GAMMA2
S101
POWER
RV406
GAMMA0
RV408
BRIGHT
S104 NAVI
SEARCH
S106 TV/VIDEO
S105
S108
S108
27
29
BSUB
BRIGHT
RV409
RGB
AMP
RV407
V COM
AMP
RV411
V COM
AMP
RV412
30
RSUB
BRIGHT
RV410
31
28
13
14
2
3
11
15
35
12
2
6
13
5
1
2
4
39
8
6
70
71
10
7
4
11
28
33
35
36
37
57
58
59
60
32
65
50
49
44
43
38
47
20
21
22
BL B+
CONTROL
Q810,811
10
9
16
3
4
5
10
1
2
4
5
REG
Q607
BUFFER
Q803,804
INVERTER
Q601
INVERTER
Q602
REG
IC502
REG
IC510
REG
Q202
INVERTER
Q205
B+(+13V)
B+(+7.5V)
B+(+5V)
B–(–17V)
D206
D204
D205
D203
38
37
FILTER
POWER
ON/OFF
SWITCH
Q120
AMP
Q113
V COM BIAS
Q405,407,408
CONTROL
SIGNAL MIX
Q111,112
REMOTE
CONTROL
SENSOR
IC1
VOL
S103
S102
S102
BUFFER
Q501
7
1
3
2
CN501
5
2
1
5
1
7
BL
DRIVE
Q604
BUFFER
Q901
32
33
21
10
20
4
6
3
14
15
16
2
8
7
22
11
B+
(5V)
B+
(+13V)
B-
(-17V)
B-
AU-L
(AUDIO)
AU-R
(BEEP)
AU-G
SIRCS
BRIGHT
POWER SW
R IN
G IN
B IN
VBS
(SYNC)
PAL/NTSC
PICTURE OFF
+B
GND
MONITOR
IN
SP1
(SPEAKER)
D102
D132
BGP
Q110
S109
SELECT
S910
H.CENT
RV601
6.1V
S801
DIMMER
1CK
1Q
2Q
1CK
1CLR
1CLR
B+
(AMP)
B+
(AMP)
B+
(SW B+)
BLKO
BLDI
SPOI
HR
PS
CTR
SPIO
CLD
CLS
SPS
VR
MOD1
MOD2
LOWI
RESV
RESH
PDP
IN–
FB
OUT
OSCI
OSCO
FRPT
FRPV
VCS
SYNI
HSY
NTPC
MDW
MDN
PWM
VCC
OSC2
S6
S3
S2
K0
K1
K2
OSC1
OUT
VCC
B+(+5V)
B+(+7.5V)
B+(+.5V)
D1
POWER
D121
X110
480kHz
1
3
POWER AMP
IC501
WIDE MODE
SELECT
IC111
T201
T601
RV201
5.17V
DC-DC
CONVERTER
VCC
IN–
FB
OUT
DIMMER
DISCRIMINATION
IC801
D802
DIMMER
SENSOR
1
2
3
4
HOT
VR
VG
VG
VB
COM
VGL
SPOI
HR
PS
CTR
CTR
HOT
NC
GND
BACK
LIGHT
UNIT
LIGHT
UNIT
LCD1
LIQUID
CRYSTAL
DISPLAY
MODULE
MODULE
6
7
8
17
18
10
11
12
13
SPIO
14
CLD
15
CLS
25
SPS
26
VR
27
MODE1
28
MODE2
29
VSHA1(+5V)
VSHA2(+5V)
VSHL1(+5V)
VSHL2(+5V)
1
2
3
4
VGH(+13V)
32
VCC
24
VSS(–17V)
21
GND
5
GND
9
GND
16
V COM AMP
IC406
R OUT
G OUT
G OUT
B OUT
2
4
INVERTER IC910
LCD TIMING CONTROL
IC901
B+
(SW B+)
DC-DC
CONVERTER
Q603
COMPARATOR
IC802
HIGH
AUTO
VIDEO INTERFACE,
LED DRIVE
IC407
• Signal path
:TV and External Video(AUDIO)
:NAVI(AUDIO)
:VIDEO
KEY IN MATRIX
IC110
CN901
AMP
IC902
3
4
B+
(+7.5V)
Q801
CN601
IC201
IC601
16
16
XTL-W70
4-2. BLOCK DIAGRAM — TUNER UNIT (VIDEO) SECTION —
J5-1
INPUT 1
VIDEO
J6-1
INPUT 2
VIDEO
AUDIO
SECTION
VIDEO
SIMUL
V1
1
2
3
7
2
13
3
1
5
6
7
1
3
4
VIDEO
SWITCH
IC19
V2
SYNC GENERATOR
IC31
X3
3.58MHz
XT
XT
C.
SYNC
SYNC
RESET
BUF
Q90
Q90
5
12
14
4
VIDEO SWITCH
IC18 (1/2)
9
10
11
COMP
BUF
Q60
Q60
VR4
RGB
DECODER
INPUT
LEVEL
LEVEL
RGB
DECODER
FO
DL2
BUF
Q103
APC
ACC
DEM
DL
AMP
MONITOR
OUT
Y/C
MIX
HUE
VXO
CHROMA
AMP
24
2
4
3
1
10
15
8
11
12
14
23
32
Y
SYNC
IN
IN
C
VR6
R
C. SYNC
G
B
30
RGB DECODER
IC24
X4
3.58MHz
5
4
12
2
9 10 11
14
15
R
BUF
Q64
Q64
G
BUF
Q63
Q63
B
BUF
Q62
Q62
SYNC
BUF
Q61
Q61
RGB SWITCH
IC26
C B A
4
1
9 10 11
14
15
2
13
12
3
5
RGB SWITCH
IC25
C B A
12
15
14
13
CN3
VBS
R
G
B
6
+B 12V
16
NT/PAL
3
AUDIO
5
BRIGHT
9
PICTURE
SW
SW
8
POWER
SW
SW
10
SIRCS
2
BEEP
61
62
46
13
58
59
52
51
64
11
45
POWER
ON/OFF
Q10
SYNC
SEP
IC17
SIRCS
Q77
COL
HUE
V SYNC
H SYNC
H
43 V. MUTE
39 VD/RGB
38 SIMUL
NT/PAL
YS
ON/OFF
DISPLAY OFF
BRT
SIRCS
37
BEEP
SYSTEM CONTROL
IC12 (2/2)
8
6
7
RGB
CONTROL
IC22 (2/2)
IC22 (2/2)
BUF
Q42
Q42
BUF
Q40, 41
SIMULATION
BUFFER
Q53
12
13
11
IC21 (2/3)
+B
(S +12V)
AUDIO
CN2 (1/2)
2
10
13
14
15
7
12
VBS
R
G
B
BEEP
SIRCS
AUX(V)
J8-1
OUTPUT
VIDEO
9
6
3
BUFFER
Q78
J10-1
SONY NAVI
(NVX)
VIDEO
NAVI IN
4
AUDIO
SECTION
1
AUDIO
SECTION
2
AUDIO
SECTION
3
BEEP GEN
IC21 (1/3)
IC21 (1/3)
BEEP
CONTROL
IC22 (1/2)
IC22 (1/2)
RGB
CONTROL
IC21 (3/3)
IC21 (3/3)
VIDEO
BUF
IC20
SIRCS
CONTROL
IC23
9
8
3
1
1
6
4
1
2
7
1
• Signal path
:AUDIO
:VIDEO
(Page 17)
(Page 17)
(Page 17)
(Page 17)
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