Sony XTL-6100MK2 Service Manual ▷ View online
10
2.5 Vp-p
0 V
38.9 MHz
T1= 40.9 MHz
T2= 31.9 MHz
T2= 31.9 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
TRAP Adjustment
Procedure:
1. With the Power off, input the output of TG to TP30 (with DC
1. With the Power off, input the output of TG to TP30 (with DC
cut by a capacitor (0.01 µF)).
2. Connect a spectrum analyzer to TP31 (with DC cut by a
capacitor (0.01 µF)).
3. Adjust T1 so that the waveform peak is 40.9 MHz ± 50 Hz.
4. Adjust T2 so that the waveform peak is 31.9 MHz ± 50 Hz.
5. After this adjustment, open TP30 and TP31. (Disconnect the
4. Adjust T2 so that the waveform peak is 31.9 MHz ± 50 Hz.
5. After this adjustment, open TP30 and TP31. (Disconnect the
spectrum analyzer.)
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 38.9 MHz ± 1 kHz.
5. After this adjustment, open TP34. (Disconnect the spectrum
5. After this adjustment, open TP34. (Disconnect the spectrum
analyzer.)
AGC Adjustment
Procedure:
1. Set the TV SYSTEM switch to 1.
2. Input a color bar signal of E8ch (196.25 MHz) and 66 dBµV
1. Set the TV SYSTEM switch to 1.
2. Input a color bar signal of E8ch (196.25 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
6.0 ± 0.1 V.
AFT Adjustment
Procedure:
1. Input a color bar signal of E8ch (196.25 MHz) and 74 dBµV
1. Input a color bar signal of E8ch (196.25 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.
• Use the following equipment for the electrical adjustment.
Equipment
1 Monitor TV (XVM-6100MK2, etc.)
2 Spectrum analyzer
3 TV signal generator
4 Digital voltmeter
5 Oscilloscope
6 Audio analyzer
7 DC power supply
8 Frequency counter
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.
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: Refer to page 12.
Adjustment points: Refer to page 12.
Adjustment points: Refer to page 12.
TUNER UNIT SECTION
Color bar signal from TV signal generator
Note:
Small peaks (dips) coming out from the top of the
waveform are unacceptable.
waveform are unacceptable.
11
white
blue
SYNC
TP111
1
2
4
3
white
blue
SYNC
TP111
1
2
4
3
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
4.433619 MHz ± 10 Hz.
4. Short the jumper wire between TP106 and GND.
5. Connect a frequency counter to TP61.
6. Confirm that reading on frequency counter is 3.579545 MHz ±
5. Connect a frequency counter to TP61.
6. Confirm that reading on frequency counter is 3.579545 MHz ±
100 Hz.
7. After this adjustment, remove the jumper wires.
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. 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.
DL AMP & DAT Adjustment
Procedure:
1. Adjust DAT so as to minimize the variation between the level
1. Adjust DAT so as to minimize the variation between the level
2 and the level 3 of TP111.
2. Adjust VR5 so that the blue level
4 is at 1.0 Vp-p.
3. Set the input to NTSC, and confirm that the blue level
4 is at
1.0 ± 0.1 Vp-p.
12
Connection points and Adjustment points: Tuner main board
T3: VCO Adjustment
: AFT Adjustment
: AFT Adjustment
VR1: AGC Adjustment
T2: TRAP Adjustment
T1: TRAP Adjustment
VR5: DL AMP & DAT Adjustment
VR6: RGB Decoder FO Adjustment
VR4: RGB Decoder
input Level Adjustment
input Level Adjustment
TP100
TP106
TP111
TP61
TP102
TP42
TP30
TP34
TP33
TP31
13
13
4-1. BLOCK DIAGRAM — MONITOR SECTION (XVM-6100MK2) —
XTL-6100MK2
SECTION 4
DIAGRAMS
7
8
5
6
8
: AUDIO
: VIDEO
1
3
AUDIO
POWER AMP
IC301
CN3
SP+
SP-
SP301
SPEAKER
R
CLAMP
Q1
7
G
CLAMP
Q11
6
22
23
24
25
27
30
9
10
11
5
2
1
2
7
3
15
14
10
28
B
CLAMP
Q21
OFFSET
CANSEL
POLARITY
SELECT
γ
RECTIFY
CH
DISPLAY
SELECT
OUTPUT
AMP
LEVEL
ADJUSTMENT
PULSE
CONVERSION
CURRENT
CONVERSION
CURRENT CONVERSION
16
17
18
19
RV213
OFFSET
RV212
COM
CUT
RV202
R
CUT
RV204
B
CUT
CURRENT CONVERSION
F.
F.
12
13
14
21
5
1
RV209
B
DRIVE
RV207
R
DRIVE
RV208
COM
DRIVE
COUNT
DOWN
VERTICAL
SEP
32FH
VCO
VIDEO CHROMA INTERFACE,
γ
-AMP, DRIVE AMP
IC201
RV702
BRIGHT
RV301
VOL
B+ (+5V)
B+
(+5V)
Q
Q
HD
SINGLE SHOT
IC203
SYNC
SEP
AFC
X202
480kHz
SYNC SEP
IC202
S1
POWER
RV601
+9V
RV401
+5V
REG
IC302
D102
POWER
F901
2A
F501
2A
F601
1.4A
B+
SWITCH
Q609
B+ (+23V)
B+ (+13V)
B+ (+5V)
B- (-5V)
B+ (+9V)
OUT2
+IN1
OUT1
SCP
+IN2
INVERTER
Q502-504
DC-DC
CONVERTER
IC401
DC-DC
CONVERTER
T501
PROTECTOR
Q401
D505
D601
D504
D503
D502
D105
D401
BL B+
SWITCH
Q602
V COM
AMP
Q211
V COM
BIAS
Q207-210
BL
ON/OFF
Q801, 802
BL
DRIVE
Q601
REG
Q604
SWITCH
Q610
INVERTER
Q607, 608
Q607, 608
2
3
1
IC601 (3/3)
13
12
14
IC601 (1/3)
8
10
IC601 (2/3)
HIGH
LOW
S701
DIMMER
BUFFER
Q603
DIMMER
IC601
CN1
3
2
15
14
13
AUDIO IN
BEEP
R. IN
G. IN
B. IN
5
BRIGHT
12
C. SYNC
16
NTSC/PAL
8
POWER.
SW
9
BL. ON/OFF
6
+B (+12V)
RV210
V COM AMP
RV211
V COM BIAS
B+ (+13V)
VGG (+23V)
VBB (+13V)
VBB (+13V)
VDD (+5V)
VDD (+5V)
VEE (-5V)
VEE (-5V)
CN8
15
13
11
VR
VG
VB
10
V COM
21
POLC
24
HD
23
VD
18
9
8
7
6
5
3
2
N/S
B+
(+23V)
B+
(+13V)
B+
(+5V)
B-
(-5V)
CN601
HV
GND
BACK-LIGHT
UNIT
DSP301
LIQUID CRYSTAL
DISPLAY
PANEL
Signal Path
DC-AC
CONVERTER
INVERTER
T601
MONITOR MAIN BOARD
04
10
SIRCS
3
1
REG
IC101
3
2
IR RECEIVER
IC102
SIRCS BUFFER
Q103
1
2
RI
GI
BI
HD
CP
OFFSET
COM.CUT
R.CUT B.CUT
B.DRV R.DRV COM.DRV
FF.CONT
FF.OUT
VO CENTER
BO
GO
RO
D702
SYNC
HD
VD
2
1
TUNER
MAIN
BOARD
CN3
(XT-
(XT-
993V)
1
(Page 14)
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