Sony KV-G14K7 Service Manual ▷ View online
– 17 –
KV-G14K7/G21KD7
RM-883
(3) Screen-corner Convergence
a. AN ITEM OF ADJUSTMENT
b. METHOD OF CANCELLATION FROM SERVICE MODE
Set the standby condition (Press
[POWER] button on the
commander) and then press
[POWER] button again,
hereupon it becomes TV mode.
c. METHOD OF WRITE FOR MEMORY
1) Set to Service Mode.
2) Press
[1] (UP) and [4] (DOWN), select an item of adjustments.
3) Press
[MUTING] button indicate WRITE (Green) on screen.
4) Press
[0] button to write into memory.
d. MEMORY WRITE CONFIRMATION METHOD
1) After adjustment, pull out the plug from AC outlet, then, plug
in 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.
Item
number
number
Note
Adjustment
item
item
Initial DATA
09
RDR
25
WHITE POINT R
0A
GDR
20
WHITE POINT G
0B
BDR
20
WHITE POINT B
3-3. FOCUS ADJUSTMENT
Adjust FOCUS using RV703 on the C Board (KV-G14K7 only) or
FOCUS control on the flyback transformer (KV-G21KD7 only)
for the best focus.
FLYBACK TRANSFORMER(T851)
(KV-G21KD7 only)
Note: Screen VR is not used.
a-d : screen-corner
misconvergence
misconvergence
b
a
c
d
FOCUS
SCREEN
(NOT USED)
(NOT USED)
SERVICE
MUTING
1 F
DATA
RDR
Adjustment Item
09
Item number
WRITE
1 F
RDR
09
0
Executes the writing
Green
Fix a Permalloy assy
corresponding to the
misconverged areas
corresponding to the
misconverged areas
Permalloy assembly
a
b
c
d
– 18 –
KV-G14K7/G21KD7
RM-883
3-4. G2 (SCREEN) AND WHITE BALANCE
ADJUSTMENTS
1. G2 (SCREEN) ADJUSTMENT (RV701)
1) Set the PICTURE and BRIGHTNESS to normal.
2) Put to VIDEO input mode without signals.
3) Connect R, G, and B of the C board cathode to the oscillo-
scope.
4) Adjust G2 (RV701) volume to the value below.
2. WHITE BALANCE ADJUSTMENTS
1) Set to Service Mode.
2) Input an entire white signal.
3) Set the PICTURE to maximum.
4) Select RDR(09) with
[1] and [4] , and then set the level to 25
with
[3] and [6] .
5) Select GDR(0A) and BDR(0B) with
[1] and [4] and adjust the
level with
[3] and [6] for the best white balance.
6) Write into the memory by pressing
[MUTING]
→
then
[0] .
0 V
165
±
2 V: KV-G14K7
177
±
2 V: KV-G21KD7
– 19 –
KV-G14K7/G21KD7
RM-883
SECTION 4
SELF DIAGNOSIS FUNCTION
If no acknowledgement is returned from a device which is turned "ON", the device has a problem.
In this case, one of the LED's responding to the problem device will flicker a defined number of times.
Flickering is operated by lighting the LED's for 60ss each time.
The flickering frequency responding to each failed device is shown below.
All the devices are checked one after another from the left of the table.
If an error is found, the responding LED will start flickering.
So, if more than 1 device have failed, only the one on the left side will flicker.
Device
Flickering
Frequency
NONVOLA-
TILE
MEMORY
1
—
—
Y/C JUNGLE
(IC300)
3
—
—
—
—
AUDIO
PROCESSOR
(IC201)
6
– 20 –
KV-G14K7/G21KD7
RM-883
Entering service mode
With the unit on standby
↓
DISPLAY
↓
5
↓
VOL (+)
↓
POWER
The operation sequence puts the unit into service mode.
SECTION 5
CIRCUIT ADJUSTMENTS
5-1. ADJUSTMENTS WITH COMMANDER
Service adjustments are made with the RM-883 that comes with
this unit.
[1], [4]
Raise/lower the service item number
[3], [6]
Raise/lower the data
[MUTING]
Writes
[0]
Executes the writing
[7], [0]
All data becomes the values in memory
[8], [0]
All user control goes to the standard state
[5], [0]
Service data initialization (Be sure not to use
usually).
[2], [0]
Write 50Hz adjustment data to 60Hz, or
viceversa.
The screen display is :
[1], [4]
Select the adjustment item.
↓
[3], [6]
Raise/lower the data.
↓
[MUTING]
Writes
↓
[0]
Executes the writing.
SERVICE
Mode
08
DATA
RGB
50
Depends on the signals
PAL, SECAM : 50
NTSC : 60
PAL, SECAM : 50
NTSC : 60
1000
0000
Adjustment item
00
Item number
SELECT
p
PIC MODE
p
SOUND
MODE
VOL
PROGR
RM-883
g
POWER
DISP
REVEAL
MUTING
TV
VIDEO
HOLD
TEXT
A/B
ENLARGE
WIDE/
V-ZOOM
WAKE UP
INDEX
SLEEP
TEXT CLR
+
+
1
2
3
4
6
7
8
9
0
+
p
–
p
5
TV
RM-883
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