Sony XVM-H6 Service Manual ▷ View online
9
XVM-H6
3-6. BRIGHTNESS TEMPORARY LEVEL
ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect digital multimeter to pin 29 of IC U600.
3. Adjust the semi-fixed VBRI so that the reading on the digital
2. Connect digital multimeter to pin 29 of IC U600.
3. Adjust the semi-fixed VBRI so that the reading on the digital
voltmeter stands at the specified value.
Specified value: 20.6 ± 0.04 V
3-7. SHARPNESS ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 48 of IC U600.
3. Adjust the semi-fixed VPIC so that the reading on the voltmeter
2. Connect digital voltmeter to pin 48 of IC U600.
3. Adjust the semi-fixed VPIC so that the reading on the voltmeter
stands at the specified value.
Specified value: 25.9 ± 0.04 V
3-8. CONTRAST ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 2 of IC U600.
3. Adjust the semi-fixed VCNT so that the reading on the voltmeter
2. Connect digital voltmeter to pin 2 of IC U600.
3. Adjust the semi-fixed VCNT so that the reading on the voltmeter
stands at the specified value.
Specified value: 1.25 ± 0.04 V
3-9. COLOR ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 6 of IC U600.
3. Adjust the semi-fixed VCOL so that the reading on the voltmeter
2. Connect digital voltmeter to pin 6 of IC U600.
3. Adjust the semi-fixed VCOL so that the reading on the voltmeter
stands at the specified value.
Specified value: 2.58 ± 0.04 V
3-10. HUE ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 13 of IC U600.
3. Adjust the semi-fixed VTIN so that the reading on the voltmeter
2. Connect digital voltmeter to pin 13 of IC U600.
3. Adjust the semi-fixed VTIN so that the reading on the voltmeter
is at 3.18 ± 0.04 V.
3-11.
γ
2 ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 26 of IC U600.
3. Adjust the semi-fixed resistor VGA2 so that the reading on the
2. Connect digital voltmeter to pin 26 of IC U600.
3. Adjust the semi-fixed resistor VGA2 so that the reading on the
voltmeter is at 2.43 ± 0.04 V.
3-12.
γ
0 ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 27 of IC U600.
3. Adjust the semi-fixed resistor VGA1 so that the reading on the
2. Connect digital voltmeter to pin 27 of IC U600.
3. Adjust the semi-fixed resistor VGA1 so that the reading on the
voltmeter is at 1.40 ± 0.04 V.
3-13. RGB GAIN (1) ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 28 of IC U600.
3. Adjust VRGB so that the reading on the voltmeter is at 2.05 ±
2. Connect digital voltmeter to pin 28 of IC U600.
3. Adjust VRGB so that the reading on the voltmeter is at 2.05 ±
0.04 V.
3-14. RGB GAIN (2) ADJUSTMENT
1. Display 5-step gray scale on the monitor screen.
2. Connect oscilloscope to pin 21 of IC U600.
3. Adjust the semi-fixed resistor VRGB so that the level of the signal
2. Connect oscilloscope to pin 21 of IC U600.
3. Adjust the semi-fixed resistor VRGB so that the level of the signal
on the fifth step from the above stands at the specified value A.
Specified value A: 0.58 ± 0.04 V
4. Adjust the semi-fixed VGA1 so that the level of the signal on the
first step from the above stands at the specified value B.
Specified value B: 3.25 ± 0.04 V
5. Adjust the semi-fixed VBRI so that the level of the signal on the
fourth step from the above stands at the specified value C.
Specified value C: 1.47 ± 0.04 V
6. Repeat items 3 to 5 and adjust the levels of the signals on the
fifth, first and fourth steps to their specified values.
3-15. B AND R LEVEL ADJUSTMENTS
1. Display 5-step gray scale on the monitor screen.
2. Connect oscilloscope to pin 21 specified as G_OUT of IC U600.
3. Measure the black-to-black level.
4. Connect oscilloscope to pin 24 specified as B_OUT of IC U600.
5. Adjust VSUB so that the back-to-black level is equal to the level
2. Connect oscilloscope to pin 21 specified as G_OUT of IC U600.
3. Measure the black-to-black level.
4. Connect oscilloscope to pin 24 specified as B_OUT of IC U600.
5. Adjust VSUB so that the back-to-black level is equal to the level
measured in item 3.
6. Connect oscilloscope to pin 19 specified as R_OUT of IC U600.
7. Adjust the semi-fixed resistor VSUR so that the back-to-black
level is equal to the level measured in item 3.
3-16. VCOM AMP ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect oscilloscope to the Q701 emitter.
3. Adjust the semi-fixed resistor VCOM until the level A of the
2. Connect oscilloscope to the Q701 emitter.
3. Adjust the semi-fixed resistor VCOM until the level A of the
output waveform stand at the specified value.
Specified value: 5.83 ± 0.04 V
GND level
A
C
B
black-to-black level
A
10
XVM-H6
3-17. VCOM BIAS ADJUSTMENT
1. Display gray scale on the monitor screen.
2. Connect oscilloscope to the Q703 No. 2.
3. Adjust the semi-fixed resistor VCDC until the levels A and B of
2. Connect oscilloscope to the Q703 No. 2.
3. Adjust the semi-fixed resistor VCDC until the levels A and B of
the output waveform stand at their respective specified values.
Specified value: A: 4.40 ± 0.04 V
B: 1.43 ± 0.04 V
3-18. BLANK LEVEL ADJUSTMENT
1. Display gray scale on the monitor screen. Set the screen to the
Normal mode.
Adjustment Location:
VFRQ
VR+5
– DISPLAY BOARD – (CONDUCTOR SIDE)
L305
C302
VSUR
VCOA
VCOL
VTIN
VCOM
VSUB
VCNT
VPIC
VBRI
VRGB
VGA1
VFREQ
VCDC
VGA2
VHIG
Q703
Q701
(COMPONENT SIDE)
U2
U600
VLOW
If not black on the right and left ends,
adjust VHIG and VLOW so that black
vertical bands appear on the right and
left ends of the screen.
adjust VHIG and VLOW so that black
vertical bands appear on the right and
left ends of the screen.
A
GND level
B
11
11
XVM-H6
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM — VIDEO SECTION —
5
3
14
12
13
4
10
9
11
15
2
1
16
40
41
42
39
16
17
18
15
14
17
15
25
24
23
22
1
13
12
11
10
3
4
5
1
19
7
8
2
3
4
CONTROL
COMMAND
INPUT
OSD
OUTPUT
SYNC
INPUT
CLOCK
OSC
OSC
INPUT
REGISTER
RAM/ADDRESS
CONTROL
NTSC CHROMA TRAP
L1,C3/C4
AGC
AGC
GAIN
BUFFER
Q1
BUFFER
Q660
COLOR
PICTURE
AGC DET
VCO
SYNC SEP
APC
DEMOD
INT/EXT/SW
MATRIX
INV
TRAP
TINT
PHASE
SHIFT
PAL CHROMA TRAP
L2,C6
PWM-DC CONVERTOR
D410
PWM
REGISTER
INITIAL
RESET
R510,C504
12-BIT
PWM
PWM-DC CONVERTOR
D411
PWM-DC CONVERTOR
D412
PWM-DC CONVERTOR
D413
BGP GEN
WINDOW
PULSE GEN
20
5
3
14
48
27 26
28 30 31
24
21
19
33
38
37
6
29
47
2
13
36
35
34
32
VIDEO
(INPUT 1)
(INPUT 2)
(OUTPUT)
CONNECTION
BOX (XA-116) (1/2)
J18 (1/2)
14
10 9
12
7
VPIC
SHARPNESS
VCNT
CONTRAST
VRGB
RGB GAIN
VSUB
B LEVEL
VSUR
R LEVEL
VGA1
γ 0
VGA2
γ 2
γ
AMP
VDD(+3.3V)
Q501
Q502
Q503
RC3/SCK/SCL
RC6/TX/CK
RC4/SD1/SDA
RB4
UC-CS
UC-WR
UC-SIN
UC-SCK
RB3
RB2
RB1
SYSTEM
CONTROL
U501 (1/2)
SCLK
CS
SIN
RST
CS
WR
SIN
SCLK
SCLK
XIN
XOUT
8
9
Y3
4MHz
TO OTHER CHANNELS
CONTROL/DATA
BUS
EVR DATA DECODER
U506
PWM1
EXD
XD
VSYNC
HSYNC
PWM2
PWM3
PWM4
L501
BLKA
VC0
VC1
VC2
SW
ACC_OUT
BRIGHT
COLOR
COM_ADJ
COM_OUT
COM_FRP
FRP
R_IN
B_IN
R_IN
CHARACTER
GENERATOR
GENERATOR
U503
R
POL
H SYNC
V SYNC
COM_OUT
G
B
VCOM
VCOM
AMP
VCOL
COLOR
VBRI
BRIGHT
NPC
CSYNC
Y/C SELECT
U1
X
A
B
C
V
V0
V1
Z
Z0
Z1
X0
X1
Y1
3.58MHz
Y2
4.43MHz
VTIN
HUE
C_IN
V_IN
VCO_IN
VCO_IN
TIN
SYN_S
SYNC_OUT
SYNC_IN
PAL
ON
BURST
_OUT
C_MA
B-Y
R-Y
PICTURE
CON
GAMMA0
GAMMA2
RGB_AMP
SUB_
BRIGHT_B
SUB_
BRIGHT_R
B-Y
G-Y
R-Y
Y
B_OUT
G_OUT
R_OUT
TRAP
RGB DECODER
U600
DISPLAY
SECTION
SECTION
A
DISPLAY
SECTION
SECTION
B
DISPLAY
SECTION
SECTION
C
DISPLAY
SECTION
SECTION
D
Signal path
: VIDEO
(Page 12)
(Page 12)
(Page 12)
(Page 12)
12
12
XVM-H6
4-2. BLOCK DIAGRAM — DISPLAY SECTION —
13
14
15
4
11
10
9
12
1
2
3
3
5
1
61
63
6
8
2
6
1
COM OSC
U701
BUFFER
Q703
BUFFER
Q602
BUFFER
Q603
BOOSTER
Q701,702
28
3
27
26
21
2
13
18
48
52
51
54
53
16
46
56
58
28 26 25
41
50
13
4
1
SYNC
DETECT
QM701,Q770
PHASE
COMPARATOR
SYNCHRO
SEPARATE
EQUIVALENT
PULSE DELETE
A
B
Z
FIELD
DESTINATION
VERTICAL
CONTER
THINNED-OUT
CONTROL/PORARITY
COMPENSATOR
A
B
Z
A
B
Z
17
6
8
11
7
5
4
4
3
2
2
12
4
7
11
6
16
3
2
+3.3V REG
U610
1
9
7
2
3
3
+5V REG
Q211
+5V REG
Q504
+B SWITCH
Q409,412
+B SWITCH
Q408,410,411
INVERTER
OSC
Q401,402
+11V REG
Q2,3
+B SWITCH
Q510, 511
SWITCHING
QM301,Q301
VDD
(+3.3V)
1
2
RESET
U702
VDD(+3.3V)
VCC
(+5.1V)
VCC
(+5.1V)
VEE
(+7.5V)
VGH
VSS
(-10V)
D304
D303
T301
D302
D301
9
10
5
4
EEPROM
U504
SDA
SCL
1
REMOTE
CONTROL
RECEIVER
M2
K4
MODE
K3
MENU
K5
POWER
K1
m
K2
M
Y4
4MHz
(VIDEO_DET)
B
X1
X0
V1
V1
V0
Z1
Z0
G
R
POL
NPC
C SYNC
H SYNC
V SYNC
COM_OUT
X
V
Z
A
B
C
B
G
R
SELECTOR
U602
VLOW
BLACK
LEVEL
LOW
VCOA
COM
LEVEL
VFRQ
DC-DC
FREQUENCY
VCDC
COM
BIAS
BIAS
VFREQ
PLL FREERUN
VR+5
+5V
PLL
CLOCK
VHIG
BLACK
LEVEL
HIGH
VCO
U704
D702
BLK
POL 2
SYNC
HOO_IN
VOUT
VIN
VDFOUT
VDFOUT
VOFIN
PD
VD
VH
VH
VCOM
VCOO
PN
L702
Q604
HDOUT1
VSYNC
SIDE1
JUST
ZOOM
SIDED1
JUST
ZOOM
RESET
STB
CHP1
DEH
DVE1
DVE2
DVE2
DEV3
CPV
STV1
STV2
STV2
RED2
RED1
GREEN2
GREEN1
BLU2
BLU1
R
G
B
CHP1
OEH
OEV1
OEV2
OEV2
DEV3
CPV
STH1
STH2
STH
1
6
CH1
CH0
A
PB7
OSC1/CLKIN
OSC2/CLKOUT
RB6
RB5
RB0/INT
RA0/AN0
RA1/AN1
SIDE1
JUST
JUST
ZOOM
RC2/CCP1
RC7/RX/DR
RC1/TIO1/CCP2
RA2/AN2
RC0/TI0OSD/TICK
R44/TDCKI
RC5/SD0
RA5/SS/AN4
Q514
D3
VCC
OUT1
RT
IN1+
+5V_B
+5V_A
SWITCHING
REGULATOR
U201
1
2
4
6
2
4
6
7
3
3
11
J18 (2/2)
J18 (2/2)
F201
(+12V)
PIC_CS
POWER
ACC_DET
(BATT)
(ACC)
CONNECTION
BOX (XA-116) (2/2)
NC
DISPLAY CONTROL
U2
RL
VCOM
VB
5
CONTROL
7
SWITCHER
U3
L403
COMMON
SYNC SWITCH
U601
SYSTEM
CONTROL
U501 (2/2)
LCD1
LCD
PANEL
BACK
LIGHT
VIDEO
SECTION
A
VIDEO
SECTION
B
VIDEO
SECTION
D
VIDEO
SECTION
C
Signal path
: VIDEO
(Page 11)
(Page 11)
(Page 11)
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