Sony KV-21FA340L Service Manual ▷ View online
34
KV-21FA340L/29FA340L
KV-21FA340L/29FA340L
SECTION 3: SAFETY RELATED ADJUSTMENTS
Hold-Down Readjustment
If the setting indicated in Step 2 of Hold-Down Operation Confi rmation
cannot be met, readjustment should be performed by altering the
resistance value of R529, R530, R531 and R577 components marked
with X.
cannot be met, readjustment should be performed by altering the
resistance value of R529, R530, R531 and R577 components marked
with X.
3mA DC range
+
-
+
-
A
+
-
FBT
TP85
T503
FBT
FBT
TP85
R531 R530
DC Power Supply
digital multimeter
ammeter
Figure 1
3-2. B+ VOLTAGE CONFIRMATION AND
ADJUSTMENT
Always perform the following adjustments when replacing the following
components, which are marked with Y on the schematic diagram on the
A Board:
components, which are marked with Y on the schematic diagram on the
A Board:
A BOARD
IC600, PH602
IC600, PH602
Adjustment (Y)
1. Using a Variac, apply AC input voltage: 130 + 2.0/-0.0 VAC
2. Input a monoscope signal.
3. Set the PICTURE control and the BRIGHT control to
minimum.
4. Confi rm the voltage on A Board between TP23 and ground is less
than 136.5 VDC.
5. If step 4 is not satisfi ed, replace R530 and R531 on A Board and
repeat the above steps.
3-1. X R529, R530, R531, R577
CONFIRMATION METHOD
(HV HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS
(HV HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS
The following adjustments should always be performed when replacing
the following components which are marked with Y on the schematic
diagram:
the following components which are marked with Y on the schematic
diagram:
C507, C511, C513, D519,
D520, D521, IC001, IC501,
IC601, IC602, PH601, R529,
R530, R531, R577, T502,
T503 (FBT), T505
D520, D521, IC001, IC501,
IC601, IC602, PH601, R529,
R530, R531, R577, T502,
T503 (FBT), T505
HV HOLD-DOWN
R529, R530, R531, R577
R529, R530, R531, R577
Part Replaced ( )
Adjustment ( )
Preparation Before Confi rmation
1. Using a Variac, apply AC input voltage: 120 +/- 2.0 VAC.
2. Turn the POWER switch ON.
3. Input a white signal and set the PICTURE and BRIGHT controls to
maximum.
4. Confi rm that the voltage of more than 23.0 VDC appears between
TP85 and ground on the A Board.
Hold-Down Operation Confi rmation
1. Connect the current meter between Pin 11 of the FBT (T503) and the
PWB land where Pin 11 would normally attach. (See Figure 1).
2. Input a dot signal and set PICTURE and BRIGHTNESS to minimum:
IABL = 2175 + 100/ -325 µA.
3. Confi rm the voltage of A Board TP91 is 134.6 ± 1.0 VDC.
4. Connect the digital voltmeter and the DC power supply to TP85 and
ground. (See Figure 1).
5. Increase the DC power voltage gradually until the picture blanks out.
6. Turn DC power source off immediately.
7. Read the digital voltmeter indication: (standard = 27.24 + 0.0/ - 0.1
VDC).
8. Input a white signal and set PICTURE and BRIGHTNESS to
maximum: IABL = 2175 + 100/ -325 µA.
9. Repeat steps 4 to 7.
35
KV-21FA340L/29FA340L
KV-21FA340L/29FA340L
4-1. REMOTE ADJUSTMENT BUTTONS AND
INDICATORS
VOLUME (+)
(Service Mode)
ENT
(Enter into
memory)
memory)
0
(Remove
from
memory)
from
memory)
3
(Adjust)
Data up
Data up
RM-Y194
5
(Display)
Category
down
Category
down
MUTING
(Enter into
memory)
memory)
1
(Display)
Item up
Item up
2
(Display)
Category up
Category up
4
(Display)
Item down
Item down
8
(Initialize)
DISPLAY
(Service Mode)
POWER
(Service Mode)
6
(Adjust)
Data down
Data down
SECTION 4: CIRCUIT ADJUSTMENTS
Electrical Adjustments by Remote Commander
Use the Remote Commander
(RM-Y194)
to
perform the circuit adjustments in this section.
Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
4-2. ACCESSING THE SERVICE
ADJUSTMENT MODE
1. Standby mode (Power off).
2. Press the following buttons on the remote commander within a
second of each other:
DISPLAY
Channel 5
Sound Volume +
POWER
The screen displays the fi rst service data device OSD item.
Signal
Type
Type
Channel
Type
Type
NTSC
VIDEO1
DEF
M6J586MK-050FP
F1.2
HSIZ
1:35 NVM:OK
Device
OSD
Item
Initial
Data
Value
1. On the Remote Commander press 2 or 5 to select the device.
2. Press 1 or 4 to select the OSD.
3. Press 3 or 6 to change the data value.
4. Press MUTING then ENTER to write into memory.
Signal
Type
Type
Channel
Type
Type
NTSC
WRITE
DEF
M6J586MK-050FP
F1.2
HSIZ
1:35 NVM:OK
Text
changes to
“WRITE” and
changes
colors from
green to red
changes to
“WRITE” and
changes
colors from
green to red
Device
OSD
Item
Initial
Data
Value
36
KV-21FA340L/29FA340L
KV-21FA340L/29FA340L
Service Adjustment Mode Memory
Use the following procedure when adjusting IDs 0-7 and when replacing
and adjusting IC002.
1. Access Service Adjustment Mode.
and adjusting IC002.
1. Access Service Adjustment Mode.
2. Press 8 then ENTER on the Remote Commander to initialize.
Signal
Type
Type
Channel
Type
Type
NTSC
RESET
DEF
M6J586MK-050FP
F1.2
HSIZ
1:35 NVM:OK
Text
changes to
“RESET”
and changes
colors from
green to red
changes to
“RESET”
and changes
colors from
green to red
Device
OSD
Item
Initial
Data
Value
The TV powers off after completing the initialization process.
4-3. CONFIRMING SERVICE ADJUSTMENT
CHANGES
1. After completing adjustments, pull out the plug from the AC outlet,
then replace the plug in the AC outlet again.
2. Access Service Adjustment Mode.
3. Using the buttons on the Remote Commander, locate the adjusted
OSD items again to confi rm they were adjusted.
37
KV-21FA340L/29FA340L
KV-21FA340L/29FA340L
4-4. SERVICE DATA LISTS
KV-21FA340L ONLY
NTSC
Video
YUV
Init
Init
Init
Data
Data
Data
VERSION
Fix
0
=
=
=
VAR
+6,=
+6,=((:'&
38
38
38
VAR
+326 +326,7,21
15
15
15
VAR
96,=
95$036,=(
12
12
14
VAR
9326 9326,7,215$03'&
30
30
30
VAR
9/,1
9/,1($5,7<
40
VAR
6&25 6&255(&7,21
35
VAR
9%2: %2:
30
VAR
9$1* $1*/(
36
VAR
75$3
(:75$3(6,80
36
VAR
3$03 (:3,1
22
VAR
83,1
833(53,1
30
VAR
/3,1
/2:(53,1
30
VAR
7527 7527
71
VAR
+%/. +%/.PRGHVHOHFW
00
VAR
5%/. +%/.UHDUWLPLQJ
23
23
23
VAR
/%/. +%/.IURQWWLPLQJ
53
53
53
VAR
9%/. 9%/.ZLGWK
3
FIX
+06. 7239(1'ZKHQ0$&529,6,21SUHYHQW2))
0
FIX
+':
+38/6(:,'7+XX
1
FIX
$)&
$)&*$,1
0
FIX
$)&
$)&7,0(&2167$17
3
FIX
$)&
$)&7,0(&2167$17
3
3
FIX
$)&: $)&38//,1:,'(
1
FIX
&'0' 9'(7:,1'2:6:7,0,1*
1
FIX
+66
6<1&6/,&(/(9(/+VHSD
0
FIX
966
6<1&6/,&(/(9(/9VHSD
3
FIX
6/8' $XWR6OLFHOHYHO83'2:1
0
FIX
-36: -XPS6:
0
FIX
+26& +9&2IRRIIVHW$'-8672))6(7
3
FIX
(+7
(+7
4
Service
Group
Fix/ Var
No.
Name
Description
DEF
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