Sony KV-27FS320 Service Manual ▷ View online
34
KV-27FS320/32FS120/32FS320/34FS120/36FS120/36FS320/38FS120
KV-27FS320/32FS120/32FS320/34FS120/36FS120/36FS320/38FS120
2-4. SCREEN (G2)
1. Input a dot pattern.
2. Set the PICTURE and BRIGHTNESS controls at minimum and
COLOR control at normal.
3. Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as
shown below so that voltages on the red, green, and blue cathodes
are 172 ± 2VDC.
are 172 ± 2VDC.
Pedestal
172 – 2VDC
Ground
±
4. Observe the screen and adjust SCREEN (G2) VR in FBT to obtain
the faintly visible background of dot signal.
2-5. METHOD OF SETTING THE SERVICE
ADJUSTMENT MODE
SERVICE MODE PROCEDURE
1. Standby mode (power off).
2. Press Display
Channel 5
Sound Volume +
Power
on the Remote Commander (press each button within a second).
SERVICE ADJUSTMENT MODE ON
1. The CRT displays the time being adjusted.
Mode
Category
Display
Item
Display
Item
Signal
Type
Type
ntsc
service
defl
vchp
00000000
00000000
hsiz
16
2. Press 1 or 4 on the Remote Commander to select the time.
3. Press 3 or 6 on the Remote Commander to change the data.
4. Press MUTING then ENTER to save into the memory.
SERVICE ADJUSTMENT MODE MEMORY
Turn the set off then on to exit Service Adjustment Mode.
service defl hsiz
16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
write
ENTER
Green
Red
MUTING
2-6. WHITE BALANCE ADJUSTMENTS
1. Input an entire white signal with burst.
2. Set to Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Adjust with SBRT if necessary.
5. Select GCUT and BCUT with 1 and 4 .
6. Adjust with 3 and 6 for the best white balance.
7. Set the PICTURE and BRIGHTNESS to maximum.
8. Select GDRV and BDRV with 1 and 4 .
9. Adjust with 3 and 6 for the best white balance.
10. Press MUTING then ENTER to save into the memory.
35
KV-27FS320/32FS120/32FS320/34FS120/36FS120/36FS320/38FS120
KV-27FS320/32FS120/32FS320/34FS120/36FS120/36FS320/38FS120
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 R530, R531 component marked with X.
cannot be met, readjustment should be performed by altering the
resistance value of R530, R531 component 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.
SECTION 3: SAFETY RELATED ADJUSTMENTS
3-1. X R530, R531 CONFIRMATION METHOD
(HV HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS
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:
C531, C532, D519, D520,
D521, IC501, IC600, PH602,
R529, R530, R531, R532,
R533, R550, T503 (FBT),
T504 (DFT)
HV HOLD-DOWN
R530, R531
Part Replaced (Y)
Adjustment (X)
PREPARATION BEFORE CONFIRMATION
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 CONFIRMATION
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:
KV-27FS320 Only (standard = 24.78 + 0.0/ - 0.1 VDC).
All except KV-27FS320 (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.
36
KV-27FS320/32FS120/32FS320/34FS120/36FS120/36FS320/38FS120
KV-27FS320/32FS120/32FS320/34FS120/36FS120/36FS320/38FS120
4-1. SETTING 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 Volumne +
Power
SERVICE ADJUSTMENT MODE ON
1. The CRT displays the item being adjusted.
DEF NTSC 1 NVM OK
M65582AMF-101FPZ0
Signal
Type
Display
Item #
Category
Item
Data
41
Data
41
Display
Item
Item
H SIZE
2. Press 1 or 4 on the Remote Commander to select the item.
3. Press 3 or 6 on the Remote Commander to change the data.
4. Press MUTING then ENTER to write into memory.
SERVICE ADJUSTMENT MODE MEMORY
service defl hsiz
16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
write
1. Press 8 then ENTER on the Remote Commander to initialize.
service defl hsiz
16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Data
Signal
Type
Type
write
Carry out Step 1 when adjusting
IDs 0-7 and when replacing and
adjusting IC002
IDs 0-7 and when replacing and
adjusting IC002
2. Press MUTING then ENTER to write into memory.
3. Turn set off then on to exit Service Adjustment Mode.
3. Turn set off then on to exit Service Adjustment Mode.
SECTION 4: CIRCUIT ADJUSTMENTS
ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER
Use the Remote Commander
(RM-Y195, RM-Y196) 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. 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 confi rm they were adjusted.
4-3. REMOTE ADJUSTMENT BUTTONS AND
INDICATORS
VOLUME (+)
(Service Mode)
6
Item
(Data down)
(Data down)
ENTER
(Enter into
memory)
memory)
0
(Remove from
memory)
memory)
3
Item
(Data up)
(Data up)
RM-Y195
5
(Device item
down)
down)
MUTING
(Enter into
memory)
memory)
1
Disp. (Item up)
2
(Device Item Up)
4
Disp. (Item down)
8
(Initialize)
DISPLAY
(Service Mode)
POWER
(Service Mode)
37
KV-27FS320/32FS120/32FS320/34FS120/36FS120/36FS320/38FS120
KV-27FS320/32FS120/32FS320/34FS120/36FS120/36FS320/38FS120
4-4. SERVICE DATA LISTS
KV-27FS320 SERVICE DATA
Common
= Means same as other register
Init
* Means change when TV is turned on
Data
VERSION
Fix
0
VER
Microprocessor version information
=
Common
RF
Composite V
Init
Init
Init
Data
Data
Data
Var
1
HSIZ
H SIZE(EW DC)
51
45
45
Var
2
HPOS
H POSITION
25
25
25
Var
3
VSIZ
V RAMP SIZE
37
35
35
Var
4
VPOS
V POSITION(RAMP DC)
30
32
31
Var
5
VLIN
V LINEARITY
32
Var
6
SCOR
S CORRECTION
56
Var
7
VBOW
BOW
39
Var
8
VANG
ANGLE
22
Var
9
TRAP
EW TRAPESIUM
24
Var
10
PAMP
EW PIN
33
Var
11
UPIN
UPPER PIN
29
Var
12
LPIN
LOWER PIN
30
Var
13
TROT
TROT
128
Var
14
HBLK
H BLK mode select
0
Fix
15
RBLK
HBLK rear timing
21
24
23
Var
16
LBLK
HBLK front timing
53
52
54
Fix
17
VBLK
V BLK width
3
Fix
18
HMSK
TOP VEND (when MACROVISION)
prevent OFF
prevent OFF
0
Fix
19
HDW
H PULSE WIDTH(25u/19u)
1
Fix
20
AFC
AFC GAIN
0
Fix
21
AFC1
AFC1 TIME CONSTANT
0
7
0
Fix
22
AFCW
AFC1 PULL IN WIDE
1
Fix
23
CDMD
V DET WINDOW SW TIMING
1
Fix
24
HSS
SYNC SLICE LEVEL(H sepa)
0
Fix
25
VSS
SYNC SLICE LEVEL(V sepa)
3
Fix
26
SLUD
Auto Slice level UP/DOWN
0
Fix
27
JPSW
Jump SW
0
Fix
28
HOSC
H VCO fo offset ADJUST OFFSET
3
Fix
29
EHT
EHT
4
Fix
30
EHTG
EHT MODE
1
Name
Description
Service
Group
Name
Description
Service
Group
DEF
Fix/ Var
Fix/ Var
No.
No.
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