DOWNLOAD Sony KV-27S42 Service Manual ↓ Size: 8.08 MB | Pages: 58 in PDF or view online for FREE

Model
KV-27S42
Pages
58
Size
8.08 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-27s42.pdf
Date
PREV: Sony KV-34FV1T (serv.man2) Service Manual

Sony KV-27S42 Service Manual ▷ View online

— 21 —
KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/
29AL66C/29SL42/29SL42C/29SL46/29XL42M
5-4. A BOARD ADJUSTMENTS
H. Frequency (Free Run) Check
1. Input a TV mode (RF) with no signal.
2. Connect a frequency counter to base of Q501
(TP-500 H. DRIVE).
3. Check H. Frequency for 15735 ± 200 Hz.
V. Frequency (Free Run) Check
1. Select video 1 with no signal input.
2. Set the conditions for a standard setting.
3. Connect the frequency counter on the A board to TP-508
(V OUT) or CN 501 pin 
 (V DY+) and ground.
4. Check that V. Frequency shows 60 ± 4 Hz.
Sub Contrast Adjustment (RDRV)
1. Input a color-bar signal and set the level to 75%.
2. In Standard mode, set PICTURE to maximum, COLOR to
minimum, and BRIGHTNESS to center.
3. Activate the Service Adjustment Mode.
4. Set both GON and BON items. Using 
 and 
;
set each to the following values. Leave RON set to 1.
SERVICE      RON      1
1: ON
0: OFF
R ON:
ON
(1)
G ON:
OFF (0)
B ON:
OFF (0)
5. Select the item DCOL item and set it to 0.
6. Connect an oscilloscope probe to CN301 pin 
 (RED
OUT).
7. Select RDRV with 
 and 
 .
8. Adjust the value of RDRV with 
 and 
 for
1.75 ± 0.05 Vp-p.
Black
White
1.75 ± 0.05 Vp-p
9. Reset the item DCOL to 1.
10. Reset GON and BON values to 1.
R ON:
ON
(1)
G ON:
ON
(1)
B ON:
ON
(1)
11. Reset Picture, Color, and Bright to normal values:
PICTURE:
MAX
COLOR:
CENTER
BRIGHT:
CENTER
12. Press 
 then 
 to save into the memory.
Display Position Adjustment (DISP)
1. Input a color-bar signal.
2. Set to Service Adjustment Mode.
3. Select DISP with 
 and 
 .
4. Adjust values of DISP with 
 and 
 to adjust characters
to the center.
5. Write to memory by pressing 
 then 
 .
6. Check to see if the text is displayed on the screen.
SERVICE      DISP     15
Sub Bright Adjustment (SBRT)
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Set the PICTURE and BRIGHTNESS to minimum.
4. Select the SBRT item with 
 and 
 .
5. Adjust the values of SBRT with 
 and 
 to obtain a
faintly visible crosshatch.
6. Press 
 then 
 to save into the memory.
KV
-
D
est
in
at
io
n
ID
-0
ID
-1
ID
-2
ID
-3
ID
-4
ID
-5
ID
-6
ID
-7
1
27S42
US
25 145
15 235
11
3
0
64
2
27S42
CND
89 145
15 135
11
3
0
64
3
27S46
US
25 155
15 235
11
3
1
64
4
27S66
US
25 155
79 235
11
3
7
64
5
27S66
CND
89 155
79 155
11
3
7
64
6
29AL42
E
17 147 173 203 123
3
0
64
7
29AL42C
E
17 147 173 203 123
3
0
64
8
29AL66
E
17 151 237 203 123
3
7
64
9
29AL66C
E
17 151 237 203 123
3
7
64
10
29SL42
E
17 145 143 203 123
3
0
64
11
29SL42C
E
17 145 143 203 123
3
0
64
12
29SL46
E
17 155 143 203 123
3
1
64
13
29XL42M
MX
17 145 143 203 123
3
0
64
Feature ID Map
— 22 —
KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/
29AL66C/29SL42/29SL42C/29SL46/29XL42M
Sub Hue, Sub Color Adjustment (SHUE, SCOL)
1. Input a color-bar signal.
2. Activate the Service Adjustment Mode.
3. Select the DCOL item and set the value to 0.
4. Connect an oscilloscope probe to CN301
Pin 
 (BLUE OUT).
5. Select the SHUE and SCOL item with 
 and 
 .
6. While showing the SHUE item, adjust the waveform with
 and 
 until the second and third bars show the same
level (V2 = V3 ± 0.15 Vp-p).
7.  While showing the SCOL item, adjust the waveform with
 and 
 until the first and fourth bars show the same
level (V1 = V4 ± 0.15 Vp-p).
 
V1
V2
V3
V4
8. Select the DCOL item and reset to 1.
9. Press 
 then 
 to save into the memory.
V. Size Adjustment (VSIZ)
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the VSIZ item with 
 and 
 .
4. Adjust value of VPOS with 
 and 
 for the best vertical
center.
5. Press 
 then 
 to save into the memory.
 
V. Center Adjustment (VPOS)
Perform this adjustment after performing H. Frequency
(Free Run) check.
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the VPOS item with 
 and 
 .
4. Adjust value of VPOS with 
 and 
 for the best vertical
center.
5. Press 
 then 
 to save into the memory.
 
H. Center Adjustment (HPOS)
Perform this adjustment after performing H. Frequency
(Free Run) check.
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
3. Select the HPOS item with 
 and 
 .
4. Adjust the value of HPOS with 
 and 
 for the best
horizontal center.
5. Press 
 then 
 to save into the memory.
 
H.Size Adjustment (HSIZ)
1. Input a cross hatch signal.
2. Activate the Service Adjustment Mode.
3. Select HSIZ with 
 and 
 .
4. Adjust with 
 and 
 for the best Horizontal size.
5. Press 
 then 
 to save into the memory.
V. Linearity (VLIN), V Correction (VSCO)
1. Input a crosshatch signal.
2. V. Correction is automatically adjusted from the circuit and
should satisfy the conditions below:
V LINEARITY (VLIN)
V CORRECTION (VSCO)
Service Adjustment Mode Memory
1. Change the value of the DCOL item to 1.
2. After completing all adjustments, press 
 then 
 .
Read From Memory
SERVICE           READ
Green
Red
ENTER
0
— 24 —
— 25 —
— 26 —
— 23 —
SECTION 6
DIAGRAMS
KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/29AL66C/
29SL42/29SL42C/29SL46/29XL42M
6.1  BLOCK DIAGRAM
6-3. PRINTED WIRING BOARDS AND
      SCHEMATIC DIAGRAMS
• All capacitors are in 
µ
F unless otherwise noted.
pF:
 µµ
F 50 WV or less are not indicated except for electrolytic
and tantalums.
• All electrolytics are 50V unless otherwise specified.
• Indication of resistance, which does not have one for
rating electrical power, is as follows:
Pitch: 5mm
Rating electrical power 1/4W (CHIP: 1/10W)
• All resistors are in ohms.
K
Ω
  = 1000
Ω
      M
Ω
  = 1000K
Ω
•
: nonflammable resistor
•
: fusible resistor
•
: internal component
•
: panel designation and adjustment for repair
•
: earth-ground
•
: earth-chassis
• All variable and adjustable resistors have characteristic
curve B, unless otherwise noted.
• The components identified by 
 in this manual have been
carefully factory-selected for each set in order to satisfy
regulations regarding X-ray radiation. Should replacement
be required, replace only with the value originally used.
• When replacing components identified by 
, make the
necessary adjustments indicated. If results do not meet
the specified value, change the component identified
by 
 and repeat the adjustment until the specified value
is achieved (refer to Safety Related Adjustments on
page 17).
• When replacing parts shown in the table below, be sure to
perform the related adjustments.
• All voltages are in Volts
• Voltage is DC with respect to ground unless otherwise
noted.
• Readings are taken with a 10MW digital multimeter.
• Readings are taken with a color-bar signal input.
• Voltage variations may be noted due to normal
production tolerance.
• Circled numbers are waveform references.
• *
: cannot be measured
•
: B + Line
•
-----
: B 
−
 Line
•
: Signal path
Reference Information
RESISTOR
:
RN
METAL FILM
:
RC
SOLID
:
FPRD
NON FLAMMABLE CARBON
:
FUSE
NON FLAMMABLE FUSIBLE
:
RW
NON FLAMMABLE WIREWOUND
:
RS
NON FLAMMABLE METAL OXIDE
:
RB
NON FLAMMABLE CEMENT
:
ADJUSTMENT RESISTOR
COIL
:
LF-8L
MICRO INDUCTOR
CAPACITOR
:
TA
TANTALUM
:
PS
STYROL
:
PP
POLYPROPYLENE
:
PT
MYLAR
:
MPS
METALIZED POLYESTER
:
MPP
METALIZED POLYPROPYLENE
:
ALB
BIPOLAR
:
ALT
HIGH TEMPERATURE
:
ALR
HIGH RIPPLE
The components identified by shading and 
  mark
are critical for safety. Replace only with the part number
specified. The symbol 
 (displayed on component side of
the circuit board) indicates fast operating fuse. Replace only
with fuse of the same rating as marked.
Les composants identifiés per un tramé et une marque 
sont critiques pour la sécurité. Ne les remplacer que par une
piéce portant le numéro spécifié.  Le symbole 
 indique
une fusible a action rapide. Doit etre remplacee par une fusible
de meme yaleur, comme marque.
Note:
(KV-27S66/29AL42/
42C/29AL66/66C)
(KV-27S66/29AL42/
42C/29AL66/66C)
A board
E board
P board
C board
K board
CV board
(KV-27S42/27S46/27S66/
29SL42/29SL42C/29SL42M)
(KV-29AL42/42C/
29AL66/66C)
HV board
HT board
(KV-29AL42/42C/
29AL66/66C)
(KV-29AL42/42C/
29AL66/66C)
6-2. CIRCUIT BOARD LOCATION
Part Replaced (     )
Adjustment (     )
HV HOLD-DOWN
(R584)
B+ VOLTAGE
CONFIRMATION
IC601, IC602
DY, C508, C505, C507, C509, C511, 
C515, C520, C573, C574, C575, 
D572, D573, D574, IC301, IC521, 
IC602, L591, L501, R582, R583, 
R585, R578, R586, R625, R626, 
T504   
857 1 A Block Diagram.p65
3/29/99, 11:32 AM
1
A BOARD LOCATION LIST
KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/29AL66C/
29SL42/29SL42C/29SL46/29XL42M
16
17
13
10
21
18
15
AGC DET 1
AGC DET 2
PS
TONE
VCA
TONE
VCA
PS
   BASS          VOL
    TRE             BAL
3
DAC
BUS DEC
4
2
Vcc/2
19
20
Vcc
CH-L
CL-L
L-IN
R-IN
22
1
VRS
GND
7
6
5
8
BASS
TRE
BAL
VOL
12
11
SDA
SCL
14
9
LOUT
ROUT
HPO
HPI
DET1
DET2
CH-R CL-R
A BOARD: IC402 CXA2021S
1
2
3
4
5
6
7
SUPPLY
VOLTAGE
OUTPUT
STAGE
SUPPLY
FLYBACK
GENERATOR
FLYBACK
GENERATOR
POWER
AMPLIFIER
THERMAL
PROTECTION
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
GND
A BOARD: IC541 TDA8172
A BOARD (*) MARK VARIANT LIST
[TUNING  CONTROL, Y/C/J,  DEFLECTION, TUNER/IF,  AUDIO,  MTS]
1
2
3
4
5
6
A
B
C
D
E
F
G
H
I
J
K
L
7
8
9
10
11
12
13
14
15
A
U
O
C 6
3
1
2
3
4
29
7
8
9
10
11
12
13
14
15
16
17
18
24
19
20
21
22
23
25
26
27
28
5
6
30
31
6dB
6dB
6dB
-6dB
32
BIAS
I C  LOGIC
2
–6dB
-6dB
Vcc
MTV-V
V1-V
V2-V
V3-V
V1-Y
V2-Y
V1-C
V2-C
MTV-L
V1-L
V2-L
V3-L
MTV-R
V1-R
V2-R
V3-R
BIAS
SCL
SDA
GND
V OUT
Y IN
Y OUT
C IN
C OUT
L OUT
R OUT
S1
S2
ADDRESS
MUTE
A BOARD: IC203  MM1311AD
— 27 —
— 28 —
— 29 —
— 30 —
D306
I-11
D605
A-12
IC301
I-10
Q285
G-2
Q361
I-6
D001 H-6
D388
H-10
D606
C-13
IC302
J-7
Q286
J-3
Q390
H-10
D002 I-14
D403
H-12
D607
D-13
IC401
G-8
Q287
J-4
Q391
H-10
D003 K-14
D501
B-5
D608
A-10
IC402
G-13
Q288
J-4
Q501
D-6
D004 J-11
D502
E-4
D609
A-10
IC521
G-4
Q300
H-10
Q502
B-6
D005
K-14
D503
E-4
D610
C-11
IC541
F-4
Q302
J-9
Q521
H-4
D201
I-2
D520
C-6
D611
D-11
IC601
C-10
Q305
H-9
Q522
G-6
D202
I-2
D521
F-5
D612
D-14
IC602
F-10
Q306
I-11
Q550
H-3
D204
I-2
D522
G-6
D613
D-10
IC604
F-10
Q307
I-11
Q555
G-9
D205
K-3
D523
H-4
D614
D-10
Q308
I-11
Q571
E-3
D207
G-2
D541
F-4
D615
A-8
Q001
I-12
Q309
I-11
Q601
D-13
D208
G-8
D550
H-3
D617
B-8
Q080
I-15
Q310
I-11
Q602
E-12
D250
I-2
D551
H-3
D620
F-13
Q082
I-12
Q349
H-6
Q603
E-13
D251
I-2
D552
D-3
D630
C-8
Q083
I-12
Q350
H-8
Q604
F-13
D252
I-2
D561
D-3
D640
B-15
Q101
K-4
Q351
I-7
Q605
F-12
D253
J-2
D562
E-2
D650
D-10
Q170
K-5
Q352
I-7
Q607
F-13
D254
J-2
D571
D-4
Q200
G-1 Q353
H-8
Q610
F-13
D255
J-2
D572
G-3
IC001
J-13
Q201
G-1 Q354
I-7
Q630
B-15
D280
J-2
D573
G-3
IC002
J-14
Q203
G-8
Q355
I-6
Q650
H-8
D281
H-2
D574
G-4
IC003
K-14
Q280
H-3
Q356
H-6
D302
G-10
D581
G-3
IC004
H-15
Q281
H-3
Q357
H-6
X001
J-13
D303
J-12
D602
C-14
IC010
K-9
Q282
H-3
Q358
H-9
X301
J-9
D304
J-10
D603
D-13
IC202
G-2
Q283
H-2
Q359
H-9
D305
I-11
D604
D-13
IC203
I-4
Q284
G-2
Q360
J-8
CRYSTAL
DIODE
IC
TRANSISTOR
NOTE:
Portions of the circuit marked as shown are high 
voltage areas.  Use care to prevent electric shocks 
during inspection or repair.
A BOARD: IC301 CXA2133S
A board
Schematic Diagrams
KV-29XL42M
KV-29SL42C
KV-29AL42
KV-29AL66
REF NO. LOC.
KV-27S42
KV-29SL42
KV-27S46
KV-29SL46
KV-27S66
KV-29AL42C
KV-29AL66C
C216
C17
0.47MF
0.47MF
0.47MF
0.47MF
0.47MF
#
#
C217
C17
0.47MF
0.47MF
0.47MF
0.47MF
0.47MF
#
#
C250
B7
#
#
#
#
1
#
1
C251
B7
#
#
#
#
1
#
1
C252
B6
#
#
#
#
0.47MF
#
0.47MF
C280
A7
#
#
#
#
#
#
470  25V
C281
A8
#
#
#
#
#
#
0.47MF
C282
B8
#
#
#
#
#
#
0.47MF
C370
F13
#
#
0.01MF
0.01MF
0.01MF
#
0.01MF
C371
F13
#
#
0.01MF
0.01MF
0.01MF
#
0.01MF
C372
F13
#
#
0.01MF
0.01MF
0.01MF
#
0.01MF
C380
F13
0.01MF
0.01MF
#
#
#
0.01MF
#
C381
F13
0.01MF
0.01MF
#
#
#
0.01MF
#
C382
F13
0.01MF
0.01MF
#
#
#
0.01MF
#
C418
F9
10MF
10MF
10MF
10MF
10MF
#
#
C613
M3
680MF 250V
560MF 400V
680MF 250V
560MF 400V
680MF 250V
560MF 400V
560 400V
C615
M6
0.0022MF
0.0047MF
0.0022MF
0.0047MF
0.0022MF
0.0047MF
0.0047MF
C616
L4
#
0.022 400V
#
0.022 400V
#
0.022 400V
0.022 400V
C617
L4
#
220p
#
220p
#
220p
220p
C627
E2
#
#
#
#
0.1MF
#
0.1MF
C699
M6
#
0.0047MF
#
0.0047MF
#
0.0047MF
0.0047MF
CN150
B1
#
#
#
#
15P
#
#
CN151
E1
#
#
#
#
#
#
8P
CN152
F13
#
#
#
#
#
#
6P
CN251
A16
#
#
#
#
#
7P
7P
CN253
A15
#
#
#
#
#
7P
7P
CN301
H20
5P
5P
5P
5P
5P
8P
8P
CN302
E20
#
#
15P
15P
15P
#
15P
D002
J2
LNK0120022G
LNK0120022G
LNK0120022G
LNK0120022G
LNK0120022G
#
#
D208
D17
MTZJ-T-77-10B MTZJ-T-77-10B MTZJ-T-77-10B MTZJ-T-77-10B MTZJ-T-77-10B
MTZJ-T-77-2.2A
MTZJ-T-77-2.2A
D280
B8
#
#
#
#
#
#
MTZJ-T-77-3.3
D281
B8
#
#
#
#
#
#
MTZJ-T-77-3.3
D403
E9
1SS133T-77
1SS133T-77
1SS133T-77
1SS133T-77
1SS133T-77
#
#
D609
L4
#
RU-1P
#
RU-1P
#
RU-1P
RU-1P
IC004
J1
IC SBX1981-51
IC SBX1981-51
IC SBX1981-51
IC SBX1981-51
IC SBX1981-51
#
#
IC203
C6
MM1311AD
MM1311AD
MM1313AD
MM1313AD
MM1313AD
MM1311AD
MM1313AD
IC401
B18
TDA7057AQ
TDA7057AQ
TDA7057AQ
TDA7057AQ
TDA7057AQ
#
#
IC601
L5
IC SRTF6626
IC SRTF6656
IC SRTF6626
IC SRTF6656
IC SRTF6626
IC SRTF6656
IC SRTF6656
J202
A11
#
#
3P
3P
3P
#
3P
J204
A9
#
#
#
#
#
#
3P
PS201
F7
2A/90V
2A/90V
2A/90V
2A/90V
2A/90V
#
#
Q080
A7
#
#
#
#
#
#
2SD601A
Q280
B7
#
#
#
#
#
#
2SB709A
Q281
B7
#
#
#
#
#
#
2SB709A
Q282
B7
#
#
#
#
#
#
2SB709A
Q283
B8
#
#
#
#
#
#
2SD601A
Q284
B9
#
#
#
#
#
#
2SD601A
Q285
J14
#
#
#
#
#
#
2SD601A
Q390
K14
#
#
#
#
#
2SD601A
2SD601A
Q391
B17
#
#
#
#
#
2SD601A
2SD601A
R020
J5
6.8K
6.8K
6.8K
6.8K
6.8K
#
#
R021
J6
680
680
680
680
680
#
#
R022
J5
820
820
820
820
820
#
#
R023
J5
2.2K
2.2K
2.2K
2.2K
2.2K
#
#
KV-29XL42M
KV-29SL42C
KV-29AL42
KV-29AL66
REF NO. LOC.
KV-27S42
KV-29SL42
KV-29SL46
KV-27S46
KV-27S66
KV-29AL42C
KV-29AL66C
R065
J2
0
0
0
0
0
#
#
R080
F8
#
#
#
#
#
#
22K
R082
F8
#
#
#
#
#
#
10K
R083
I3
#
#
#
#
#
#
470
R084
G8
#
#
#
#
#
#
10K
R090
J4
10K
10K
10K
10K
10K
#
#
R211
D17
100 1/6W
100 1/6W
100 1/6W
100 1/6W
100 1/6W
#
#
R212
D18
4.7 1/4W
4.7 1/4W
4.7 1/4W
4.7 1/4W
4.7 1/4W
#
#
R231
C17
2.2K
2.2K
2.2K
2.2K
2.2K
#
#
R232
C16
10K
10K
10K
10K
10K
#
#
R233
C16
10K
10K
10K
10K
10K
#
#
R236
C17
2.2K
2.2K
2.2K
2.2K
2.2K
#
#
R255
E6
#
#
#
#
#
75
75
R278
C7
#
#
#
#
0
#
0
R280
A6
#
#
#
#
#
#
100
R281
B6
#
#
#
#
#
#
100
R282
B6
#
#
#
#
#
#
100
R283
E7
#
#
0
0
0
#
0
R284
A6
#
#
#
#
#
#
220
R285
A6
#
#
#
#
#
#
4.7K
R286
B6
#
#
#
#
#
#
4.7K
R287
B7
#
#
#
#
#
#
4.7K
R288
B7
#
#
#
#
#
#
4.7K
R289
B8
#
#
#
#
#
#
68
R290
B8
#
#
#
#
#
#
470K
R291
B9
#
#
#
#
#
#
470K
R292
B9
#
#
#
#
#
#
470K
R293
B7
#
#
#
#
#
#
6.8K
R294
B8
#
#
#
#
#
#
6.8K
R295
B9
#
#
#
#
#
#
6.8K
R390
J14
#
#
#
#
#
1K
1K
R391
J14
#
#
#
#
#
10K
10K
R392
K14
#
#
#
#
#
1K
1K
R394
G4
#
#
#
#
#
220
220
R395
J14
#
#
#
#
#
1K
1K
R400
E8
22K
22K
22K
22K
22K
#
#
R407
D7
0
0
#
#
#
0
#
R432
F9
8.2K
8.2K
8.2K
8.2K
8.2K
#
#
R450
D16
#
#
#
#
#
0
0
R451
D16
#
#
#
#
#
0
0
R633
M3
390K
270K
390K
270K
390K
270K
270K
R637
L3
#
100K
#
100K
#
100K
100K
R638
M3
JW(5MM)
270K
JW(5MM)
270K
JW(5MM)
270K
270K
R656
M6
33
56
33
56
33
56
56
S001
J6
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
#
#
S002
J5
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
#
#
S003
J5
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
#
#
S004
J5
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
#
#
S005
J6
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
#
#
S006
J4
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
#
#
S007
J4
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
1-692-431-21
#
#
T603
E6
1-433-806-11
1-433-807-11
1-433-806-11
1-433-807-11
1-433-806-11
1-433-807-11
1-433-807-11
THP601
M9
#
1-803-540-11
#
1-803-540-11
#
1-803-540-11
1-803-540-11
THP602
M9
1-809-539-11
#
1-809-539-11
#
1-809-539-11
#
#
#: NOT MOUNTED
857 2 A IC block and PWB.p65
3/26/99, 3:16 PM
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