Sony KV-21XE42C Service Manual ▷ View online
— 21 —
KV-21XE42C
A
BOARD
R582 CONFIRMATION METHOD
(HV HOLD-
DOWN CONFIRMATION) AND READJUSTMENTS
The following adjustments should always be performed when
replacing the following components which are marked with
] on
the schematic diagram:
IC301, IC521, IC602, D572, D573, D574, DY,
C511, C574, C575, R578, R582, R583, R584,
R585, R586,R625, R626, R634, R635, T504 (FBT)
C511, C574, C575, R578, R582, R583, R584,
R585, R586,R625, R626, R634, R635, T504 (FBT)
(1) Preparation before Confirmation
1) Turn the POWER switch ON. Input an entirely white
signal and set the PICTURE and BRIGHT controls to
maximum.
maximum.
2) Confirm that the voltage between C574(+) and ground is
more than: 99.8VDC
when the set is operating normally with 120.0-240.0
when the set is operating normally with 120.0-240.0
±
2.0
VAC.
(2) Hold-down Operation Confirmation
1) Connect the current meter between Pin 11 of the FBT
(T504) and the PCB land where Pin
11
would normally attach.
2) Input a dot signal and set PICTURE and BRIGHTNESS to
minimum:
IABL = 95+100/-95
µ
A
3) Confirm the voltage of A board TP-600 is
116.8
±
0.3VDC
4) Connect the Digital Voltmeter and the DC power supply
via diode 1SS119 to C574 (+). (See figure 1.0 on next page.)
5) Increase the DC power voltage gradually until the picture blanks out.
6) Read the digital voltmeter indication.
7) Turn DC power source off immediately.
STANDARD
Less than or equal to: 127.3 VDC
Less than or equal to: 127.3 VDC
8) Input a white signal and set PICTURE and BRIGHTNESS to Max
9) Repeat steps from (4) to (7).
STANDARD
Less than or equal to: 127.3 VDC
Less than or equal to: 127.3 VDC
SECTION 4
SAFETY RELATED ADJUSTMENTS
The following adjustments should always be performed
when replacing the following components which are marked
with
] on the schematic diagram:.
IC001, IC602, R030, R626, R632,
R633, R635, R636, R637, R638, R639
1) Supply 130
±
2.0
0
VAC to the set with a variable auto
transformer.
2) Input a dot signal.
3) Set the PICTURE control and the BRIGHT control to
minimum condition.
4) Set to service adjustment mode.
5) Select PADJ with
and
.
6) Adjust with to the 0 level.
7) Confirm the voltage of A BOARD TP-600 is less than
7) Confirm the voltage of A BOARD TP-600 is less than
125V DC.
8) If step 7 is not satisfied, replace the components, repeat the
above steps.
9) Supply 120.0
±
2.0 VAC to the set with a variable auto
transformer.
10) Adjust with
and
for: 116.8
±
0.3V DC
11) Write into the memory by pressing
then
.
B+ VOLTAGE CONFIRMATION AND ADJUSTMENT
(3) Hold-down Readjustment
If the current setting indicated in step 2-2 cannot be met,
readjustment should be performed by altering the resistance
readjustment should be performed by altering the resistance
value of R582, a component marked with
.
+
I ABL
ABL
T504
FBT
range
-
ammeter
3.0 mA DC
A
— 22 —
KV-21XE42C
ABL 11
AMMETER
3mA dc range
T504
FBT
DIGITAL
MULTIMETER
TP600
[A BOARD]
POWER
SUPPLY
C574
DIGITAL
MULTIMETER
1SS119
R582
— 23 —
KV-21XE42C
5-1. ELECTRICAL ADJUSTMENT BY REMOTE COMMANDER
7. Press
then
on the Remote Commander to
initialize.
Carry out step 7 when adjusting
IDs 0 to 4 and when replacing
and adjusting IC003.
IDs 0 to 4 and when replacing
and adjusting IC003.
SERVICE RESET
8. Turn set off and on to exit.
(3) Adjust Buttons and Indicator
Use Remote Commander (RM-Y155) to perform circuit
adjustments on this model.
adjustments on this model.
NOTE : Test Equipment Required.
1. Pattern Generator
2. Frequency Counter
3. Digital Multimeter
4. Audio OSC
2. Frequency Counter
3. Digital Multimeter
4. Audio OSC
(1) Method of Setting the Service
Adjustment Mode
SERVICE MODE PROCEDURE
1. Standby mode. (Power off)
2.
on the
Remote Commander. (Press each button within a
second.)
SERVICE ADJUSTMENT MODE IN
3. The CRT displays the item being adjusted.
4. Press
or on the Remote Commander to select the
item.
5. Press
or on the Remote Commander to change the
data.
6. Press
then
to write into memory.
SERVICE ADJUSTMENT MODE MEMORY
Green
SERVICE WRITE
Red
(2) Memory Write Confirmation Method
1. After adjustment, pull out the plug from the AC outlet,
then replace the plug in the AC outlet again.
2. Turn the power switch ON and set to service mode.
3. Call the adjusted items again to confirm they were adjusted.
then replace the plug in the AC outlet again.
2. Turn the power switch ON and set to service mode.
3. Call the adjusted items again to confirm they were adjusted.
SECTION 5
CIRCUIT ADJUSTMENTS
CIRCUIT ADJUSTMENTS
RM-Y155
1
2
3
4
5
6
7
8
9
0
MUTING SLEEP POWER
TV/VIDEO
ENTER
RESET
VOL CH
JUMP
+
-
ENTER
Write into memory
Service mode
Initialize
5
8
Data up
Data down
3
6
POWER
Service mode
MUTING
Write the memory
Item up 1
Item down 4
DISPLAY
Service mode
VOL(+)
Service mode
DISPLAY
MTS
+
-
MENU
SELECT
Disp.
(Item)
(Item)
Item
data
data
SERVICE SYS 0
— 24 —
KV-21XE42C
(4) Item of Adjustments
Note: No. 1 through 64 show adjustment order.
SERVICE ID0 25
D A T A INITIAL
DATA
AVERAGE
NO.
I T E M
FUNCTION
RANGE NTSC
P A L - M
P A L - N VIDEO
D A T A
1
HSIZ
HORIZONTAL AMP. ADJ.
0 - 6 3 3 1
3 1
3 1
3 1
2 HPOS HORIZONTAL POS. ADJ.
0 - 6 3 2 1
2 1
1 9
2 8
3
VBOW VRT LINE BOWING ADJ.
0 - 1 5
6
8
4 VANG VRT LINE BOW SLANT ADJ.
0 - 1 5
6
1 0
5 TRAP HORIZ. TRAPEZOID ADJ.
0 - 1 5 1 5
1 5
6
PAMP HORIZ. PIN DISTORTION ADJ.
0 - 6 3 3 1
3 1
3 1
3 1
7
CPIN
SAME AS PAMP-SCRN TP/BTM 0 - 6 3 3 1
3 1
3 1
3 1
8
VSIZ
VERTICAL AMP. ADJUST
0 - 6 3 4 3
4 3
4 7
4 4
9 VPOS VERTICAL POSITION ADJ.
0 - 6 3 3 5
3 5
2 8
3 3
1 0 VLIN
VERTICAL LINEARITY ADJ.
0 - 1 5 7
7
7
5
1 1 SCOR VERTICAL AMOUNT ADJ.
0 - 1 5 7
7
7
9
1 2 VZOM 16:9 CRT Z MODE ON/OFF
0 , 1
0
0
1 3 EHT
VRT HI-VOLT. CORRECTION
0 - 1 5 1 5
1 5
1 4 ASP
ASPECT RATIO CONTROL
0 - 6 3 4 7
4 7
1 5 SCRL
16:9 CRT Z MODE TRAN SCRL
0 - 6 3 3 1
3 1
1 6 HBLK
RGB OUT WIDTH CONTROL
0 , 1
1
1
1 7 LBLK LEFT SCREEN HBLK CONTROL
0 - 1 5 1 5
1 5
1 8 RBLK
RGT SCREEN HBLK CONTROL
0 - 1 5 3
3
1 9 VUSN V
SAW WAVEFORM COMPRES
0 , 1
0
0
2 0 HDW
H. DRIVE PULSE WIDTH
0 , 1
0
0
2 1 EWDC EW/DC ADJUST
0 , 1
0
0
2 2 LVLN SCREEN BTM VRT LIN ADJUST 0 - 1 5 0
0
2 3 UVLN SCREEN TOP VRT LIN ADJUST
0 - 1 5 0
0
2 4 RDRV R
OUTPUT DRIVE CONTROL
0 - 6 3 3 0
3 2
2 5 GDRV G
OUTPUT DRIVE CONTROL
0 - 6 3 2 4
2 8
2 6 BDRV B OUTPUT DRIVE CONTROL
0 - 6 3 2 1
2 5
2 7 RCUT R
OUTPUT CUTOFF CONTROL
0 - 1 5 1 5
7
2 8 GCUT G
OUTPUT CUTOFF CONTROL
0 - 1 5
7
5
2 9 BCUT B OUTPUT CUTOFF CONTROL
0 - 1 5
7
6
3 0 DCOL
DYNAMIC COLOR ON/OFF
0 , 1
0
1
3 1 SHUE SUB HUE
0 - 3 1 1 5
1 5
3 2 SCOL SUB COLOR
0 - 3 1 1 4
1 4
1 4
1 5
3 3 SBRT SUB
BRIGHTNESS
0 - 3 1 7
5
3 4 RON
R OUTPUT ON/OFF
0 , 1
1
1
3 5 GON
G OUTPUT ON/OFF
0 , 1
1
1
3 6 BON
B OUTPUT ON/OFF
0 , 1
1
1
3 7 AXPL AXIS
PAL
0 , 1
0
0
3 8 AXNT AXIS
NTSC 0 , 1 0
0
3 9 CBPF
CHROMA BPF ON/OFF
0 , 1
1
1
4 0 CTRP Y
TRAP FILTER ON/OFF
0 , 1
0,1:combfilter models
0
4 1 COFF COLOR
ON/OFF
0 , 1
0
0
4 2 KOFF SET COLOR KILLER
0 , 1
0
0
4 3 SSHP SUB SHARPNESS
0 - 1 5 1 0
1 0
4 4 SHPF
SHARPNESS CIRCUIT F0
0 , 1
1
1
1
4 5 PREL PRE/OVR SHOOT SWITCHING
0 , 1
0
0
4 6 Y-DC DC TRANS RATIO SWITCHING
0 , 1
1
1
4 7 GAMM GAMMA CORRECTION AMNT
0 - 3
0
0
4 8 ABLM ABL MODE SWITCHING
0 , 1
1
1
4 9 VTH
ABL C D VTH SWITCHING
0 , 1
1
1
5 0 YDEL Y DELAY TIME CONTROL
0 - 1 5 7
7
5 1 NCOL NO
COLOR
ID
0 , 1
1
1
5 2 FSC
FSC OUT ON/OFF
0 , 1
'1' for V series, '0' for S,M & trinorma
0
5 3 K - I D KILLER ID CONTROL SW
0 , 1
0
0
5 4 HOSC H
VCO OSCILLATION FREQ
0 - 1 5 1 0
1 0
5 5 VSS
V SYNC SLICE LEVEL
0 , 1
0
0
5 6 HSS
H SYNC SLICE LEVEL
0 , 1
0
0
5 7 HMSK 0 , 1
1
1
5 8 VTMS SELECT SIGNAL VTIM PIN
0 - 3
0
0
5 9 CDMD V CNT DWN MODE SWITCHING 0 - 3
0
1
1
6 0 AFC
AFC LOOP GAIN SWITCHING
0 - 3
0
0
0
6 1 FIFR
FIELD FREQUENCY
0 - 3
'3' for NTSC models, '1' for trinorma
1
6 2 SBAL SUB
BALANCE
0 - 1 5 1 3
1 3
6 3 DISP OSD
POSITION
0 - 1 2 7 1 5
1 5
6 4 PADJ
POWER ADJUSTMENT
0 - 6 3
5 1
4 7
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