Sony FDL-PT22 / FDL-PT22JE Service Manual ▷ View online
– 9 –
RF.AGC ADJUSTMENT
(1) Input the VHF color bar signal from the test signal generator.
(2) Adjust RV201 to optimum position so that there is no snow
noise on the screen.
CHANNEL DISPLAY POSITION ADJUSTMENT
(1) Set S601 in the VHF position.
Insert resistors (47k
Ω
+ 15k
Ω
) between JL25 and JL77 (4.5V
line), and short circuit JL21 and JL30 (D.GND).
(2) Receive 2ch, and adjust the channel display position with
RV002.
(3) Receive 13ch, and adjust the display bar with RV004.
(4) Carry out tracking, because (2) and (3) interfere with each other.
(5) Receive 6 and 7ch, and check that the display bar conforms to
the standard.
(6) Set S601 in the UHF position.
(7) Receive 14ch and adjust the display position with RV001.
(8) Receive 40ch and 69ch, and check that the display bar con-
forms to the standard.
(9) Remove resistors from JL25 and JL77, and open the short cir-
cuit between JL21 and JL30
Approx. 1.0Vp
45.75MHz
Fig.3-2
(3) Remove the external voltage (MGC) from JL51.
(4) Connect the output between JL31 (AFT) and JL30 (D.GND) to
an oscilloscope, and roughly adjust T201 so that the position
of 45.75MHz will be a zero cross.
(5) Remove 1k
Ω
from the section between JL77 (4.5V) and JL28
(RF AGC).
AFT ADJUSTMENT
(1) Insert 1k
Ω
between JL77 (4.5V) and JL28 (RF AGC).
Note:
Because of drifting due to aging, adjustment should
be made at the end of the process.
be made at the end of the process.
(2) Switch the sweep signal to CW.
fo = 45.75MHz
±
5kHz
Input the above signal to the section between JL26 (IF) and
JL27 (IF GND), and finely adjust T201 so that the level be-
tween JL31 (AFT) and JL30 (D.GND) will be 2.2
±
0.4VDC.
(3) Remove 1k
Ω
from the section between JL77 (4.5V) and JL28
(RF AGC).
Display bar
Channel No.
6
JL77
JL25
47K
15K
*Channel No. and display ber are to be in line.
Fig.3-3
– 10 –
3-3. B BOARD ADJUSTMENT
- B BOARD - (COMPONENT SIDE)
RV402
RV301
GRADATION ADJUSTMENT
(1) Input a 10-step staircase signal from the test signal generator.
(2) Connect an oscilloscope probe between JL83 (G) and JL67 (D.
GND) and observe the waveform.
(3) The contrast should change when RV402 is turned.
(4) Connect the oscilloscope prove between JL84 (AUTO CB) and
JL67 (D. GND), and observe the waveform. Adjust RV402 so
that voltage A is 2.2
±
0.2V
(5) Check that the waveform between JL84 and JL67 is as shown
in Fig.3-4.
(6) Check to see that the phases C and D are within the range speci-
fied (
↔
).
JL83
JL84
0 IRE
100 IRE
C
D
A = 2.2
±
0.2V
Picture contrast
is varies.
is varies.
Fig.3-4
HUE ADJUSTMENT
(1) Receive a color bar.
(2) Insert an oscilloscope between JL81 (B) and JL67 (D.GND).
(3) Arrange RV301 as shown in Fig.3-5.
Fig.3-5
– 11 –
– 12 –
– 13 –
– 14 –
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
BS
COMPOSITION
28
27
SELECT
BAND
BS
U/V
CONTROL
TUNING
BAND
SELECT
BT
26
GEN.
BT
RETURN
AUTO
INITIAL
SET
CHARGE/
DISCHARGE
CIRCUIT
DEFEAT
OUTPUT
DEFECT
SIGNAL
3
HP
14
1
4
5
COMPARATOR
6
10
DEF
FH
H SYNC
AFC
SUD
CS
18
UP
UA
22
OUTPUT
BA R
V
30
U
31
BAR
DISPLAY
POSITION
ADJUST
RV001
U LOW
UA
RV003
VB
BS
SW
Q006
UB
S601
(1/2)
MB
TV
Q001
BUFFER
Q002
AMP
FILTER
SWF201
IF AMP
Q201
IF
AGC
RF IN
TU101
TUNER
6
7
3
IF AMP
IF
IF
AGC OUT
AGC DL
AGC IF
4
RV201
DET
VIDEO
20
19
REF COIL
REF COIL
AUDIO
13
BUFFER
FM
DET
14
E-VDL
15
FM DET
16
LIM
INV
Q205
FH SW
Q005
CF202
LIMITER
10
SIF
DET OUT
18
SEP
SYNC
AFT
SYNC
23
AFT
17
VIDEO
AMP
SYNC SEP
22
AFT COIL
21
AFT
S001
S002
Q007
AFC SW
Q003,004
INV/SW
CF203
CF201
Q202
BUFFER
LLD
2
3
5
9
7
8
8
7
9
5
3
2
IND
H SYNC
VIDEO
AUDIO
H.P
VHF
CN201
CN502
T(TUNER,VIF/SIF DET,TUNING)
RV501
2
3
VCC
6
7
V+
J501
PHONES
SPEAKER
CN601
CN301
VHF
H.P
VIDEO
H SYNC
IND
2
3
9
7
8
8
7
9
3
2
(2/2)
S601
F601
9
8
4
PORT SW
Q601-603
RV601
PORT SW
Q610
3
7
6
1
T601
+30V
+4.5V
Q401
BUFFER
+30V
11
11
BRT
RV450
5
1
4
2
3
DRIVE
Q701
DRIVE
Q702
8
6
T701
BACK
LIGHT
DC IN
J701
BATTERY
A(DC IN,B/L INV)
BUFFER
Q403
40
37
R2
HSO
V IN
34
Q303
SYNC SEP
35 H IN
IND SW
Q408
38 INB
R
40
Q302
INV
5
1
2
9
19
10
21
11
23
12
RV301
X301
3.58MHz
VIDEO IN
SYNC SEP
TINT CONT
VCXO IN
VCXO OUT
HD IN
CONTRAST
R OUT
G OUT
B OUT
IC301 Y/C/J
IC001 TUNER CONTROL
IC201 VIF/SIF DET
IC501 HP AMP
27
29
28
23
B IN
G IN
R IN
AUTO CB
1
24
40
2
3
4
5
6
7
8
9
CP
CL2
CLB
CLA
D2
D3
D4
D1
BESTB
22
38
21
37
20
36
12
28
11
27
10
26
9
25
13
29
2
6
23
39
4
3
TPR2
TPR1
VM
VM
VM
VSS
17
18
33
34
16
32
15
31
VDG
VDR
VDG
VDR
VDB
VDB
VS2
VS2
BUFFER
Q402
Q406
SW
VM BUFFER
Q407
13
TPR1
12
TPR1B
DB 10
XTD
XT1
4.5MHz
X401
21
20
30
TGL VL
RV402
IC401
MONITER CONTROL
B(HP AMP,MONITOR CONTROL,CHROMA)
LCD
MONITOR
CP
CP
CL2
CL2
CLB
CLB
CLA
CLA
D2
D2
D3
D3
D4
D1
D1
RES
RES
UB
12
12
+4.5V
UP DOWN SW 11
11
UP
D701
DOWN
+4.5V
+4.5V
20
19
RV002
V LOW
23
24
RV004
V HI
VLP
VHP
VHA
VLA
– 18 –
– 17 –
– 16 –
– 15 –
4-2. CIRCUIT BOARDS LOCATION
4-3. PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS
Note:
• All capacitors are in
µ
F unless otherwise noted. pF :
µµ
F 50WV or less are not
indicated except for electrolytics and tantalums.
• All electrolytics are in 50V unless otherwise specified.
• All resistors are in ohms.
k
Ω
=1000
Ω
, M
Ω
=1000k
Ω
• Indication of resistance, which dose not have one for rating electrical power, is
as follows.
Pitch : 5mm
Rating electrical power :
1
/
4
W (CHIP :
1
/
10
W)
•
: internal component.
•
: panel designation and adjustment for repair.
• All variable and adjustable resistors have characteristic curve B, unless other-
wise noted.
• As to the voltage volue shown by the semiconductors on the Shematic Dia-
gram, see the another list
• Readings are taken with a color-bar signal input.
• Readings are taken with a 10M
Ω
digital multimeter.
• Voltages are dc with respect to ground unless otherwise noted.
• Voltage variations may be noted due to normal production tolerances.
• All voltages are in V.
*
: Measurement impossibillity.
•
v
: B+line.
•
: signal path.
• Circled numbers are waveform references.
Reference information
RESISTOR
: RN
METAL FILM
: RC
SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW
NONFLAMMABLE WIREWOUND
: RS
NONFLAMMABLE METAL OXIDE
: RB
NONFLAMMABLE 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
Note: The components identified by shading and mark
¡
are critical for safety. Replace only with part number
specified.
specified.
A
B
T
G
D
S
B1 E1
C2
B2 C1
E2
2
3
4
5
6
7
8
9
0
!¡
!™
!¢
!§
!¶
!•
–
1
G
D
S
B2 E2
C1
B1 C2
E1
B2 E2
C1
B1 C2
E1
B2 E2
C1
B1 C2
E1
!ª
B1 E1
E2
C1(B2)
C2
@º
B1
E2
C1
C2
@™
@£
(B2)
E1
(B2)
E1
E2
B1
C2
C1
@¡
B1
E1
C2
B2
C1
E2
G
S
S
D
G
D
B1
E1
C2
B2
C1
E2
B1
E2
C2
C1(B2)
E2
B1
C1
C2
E1(B2)
C2
B1
C1
E2
E1(B2)
C2
B1
C1
E2
B2
E1
C2
Ver.1.5
Transistor
(FET)
(FET)
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Discrete semiconductot
(Chip semiconductors that are not actually used are included.)
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Source
Source
Anode
Anode
(NC)
(NC)
Cathode
Anode
Cathode
Common
Cathode
Cathode
Common
Cathode
Cathode
Common
Common
Common
Common
Cathode
Anode
Base
Emitter
Collector
Base
Emitter
Collector
Drain
Gate
Gate
Drain
Device
Printed symbol
Terminal name
Circuit
Terminal name of semiconductors in silk screen
printed circuit (
)
Anode
Anode
Anode
Cathode
Anode
Anode
Cathode
!£
Transistor
(FET)
(FET)
Transistor
(FET)
(FET)
!∞
Emitter
Collector
Base
Transistor
Source
Gate
Drain
Cathode
Anode
Anode
Cathode
Anode
Anode
Pin Volt
Pin Volt
Pin Volt
IC001
1
2.7
2
0
3
0.3
4
0.5
5
2.5
6
2.5
7
2.5
8
4.3
9
-
10
0.7
11
2.5
12
0
13
0.3
14
0.0
15
3.7
16
-
17
-
18
0
19
2.2
20
2.2
21
2.9
22
0.8
23
2.1
24
2.1
25
-
26
1.7
27
3.8
28
0
29 GND
30
30
0
31
0
32
0
IC201
1
3.4
2
3.4
3
1.6
4
3.3
5
4.2
6
3.4
7
3.4
8
GND
9
4.3
10
1.6
11
1.6
12 GND
13
13
1.8
14
3.5
15
2.1
16
1.5
17
2.4
18
2.0
19
1.9
20
1.9
21
3.4
22
3.4
23
0.4
24
1.7
T BOARD IC VOLTAGE LIST
All voltage are in V.
- : Not used
B
C
E
Q003
0
3.7
GND
Q004
3.7
0.7
4.3
Q007
2.6
0.5
4.3
Q201
1.0
4.2
0.3
Q202
1.9
GND
2.6
Q203
0
3.5
GND
T BOARD TRANSISTOR
VOLTAGE LIST
VOLTAGE LIST
1
2
3
4
5
6
Q002
0
1.7
2.2
29.5
1.7
2.2
Q006
1.2
1.2
GND
0
0
GND
All voltage are in V.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
A
B
C
D
E
F
G
H
I
J
4.5V
2
30V
4.5V
30V
4.5V
4.5V
4.5V
4.5V
3
1
IF
IF
IF
IF
SIF
30V
4.5V
IF
SIF
VIDEO
VIDEO
VIDEO
IF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
10
9
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
10
11
12
IF
MB
VB
BS
TV
UB
AGC
ANT
G
SWF
I
G
O
O
1
2
3
4
6
1
2
3
4
6
IC001
C001
R016
R017
R011
R005
C003
RV004
C008
C007
R004
R009
Q001
R008
RV001
C005
R014
R018
R029
IC201
R209
R210
R205
C206
R208
R221
C213
C215
C212
RV201
C226
C225
R223
R228
R225
C222
R222
C218
R230
C209
C211
R220
Q201
R216
R219
R218
C210
Q202
R201
C208
R024
R022
R019
R020
D001
R241
R242
R243
C011
Q203
C004
C015
Q003
Q004
R021
Q002
R240
C234
C235
R012
Q006
R032
R001
C002
L201
C006
C014
R010
R214
R215
R231
C236
Q007
C106
C109
C110
C108
J101
C016
C202
C205
R226
C224
C223
C219
C012
C107
C203
R030
C018
CN201
C105
R031
C204
RV002
R002
R003
D002
C021
CF201
C207
CF202
R213
R212
R206
CF203
R229
L206
R217
R013
TU101
L205
SWF201
T201
T202
R202
R224
R111
4.7
25V
:7L
25V
:7L
47
6.3V
:7L
560p
CH:CHIP
47
6.3V
:7L
0.01
B:CHIP
0.1
25V
25V
F:CHIP
0.001 B:CHIP
0.47
25V
F:CHIP
10
16V
:7L
:7L
0.1 25V F:CHIP
100p
CH:CHIP
27p
CH:CHIP
2p
CK:CHIP
0.01
B:CHIP
0.01
B:CHIP
0.01
B:CHIP
0.01
B:CHIP
0.01
B:CHIP
47
6.3V
:7L
0.01
B:CHIP
10
16V
:7L
:7L
0.01
B:CHIP
0.01
B:CHIP
0.01
B:CHIP
0.001
B:CHIP
22
6.3V
:7L
MA152WK-TX
AN5707NFAP
M51348AFP
15µH
:FR-CP
2SB709A-R
XN4601
UN2210-TX
UN2110-TX
XN4215
UN211D-TX
2SC3837KT146Q
2SB709A-R
UN2210
100k
:CHIP
47k
:CHIP
150k
:CHIP
270k
:RN-CP
33k
:RN-CP
2.2
:CHIP
10k
:CHIP
330k
:CHIP
39k
:CHIP
39k
:CHIP
18k :CHIP
100k
:CHIP
270k
:CHIP
470k
:CHIP
100k
:CHIP
47k
:CHIP 47k
:CHIP
470
:CHIP
2.2k
:CHIP
680
:CHIP
100k
:CHIP
680 :CHIP
1.8k
:CHIP
33k
:CHIP
1k
:CHIP
10
:CHIP
1.2k
:CHIP
68
:CHIP
390
:CHIP
47
:CHIP
8.2k
:CHIP
1k
:CHIP
3.9k
:CHIP
10k
:CHIP
10
:CHIP
10
:CHIP
10k
:CHIP
180k
:CHIP
470
:CHIP
22k
:CHIP
0.001
B:CHIP
0.001
B:CHIP
0.001
B:CHIP
0.001
B:CHIP
0.1
25V
25V
F:CHIP
0.01
B:CHIP
10
16V
:7L
:7L
2.2k
:CHIP
0.01
B:CHIP
1
16V
F:CHIP
0.1
F:CHIP
47k
:CHIP
100k
:CHIP
1k
:CHIP
0.1
25V
F:CHIP
1
16V
F:CHIP
1
1
0
:CHIP
0.001
B:CHIP
82k
:CHIP
0.001
B:CHIP
47k
:CHIP
100k
:CHIP
68k
:CHIP
12P
MA157-TX
0.01
B:CHIP
TPS4.5MC
10p
CH:CHIP
CD4.5MC
10k
:CHIP
680
:CHIP
1.8k
:CHIP
SFSL4.5MC
10k
:CHIP
1µH
:FR-CP
1k
:CHIP
56k :CHIP
TEPA5
0.82µH
:FR-CP
:FR-CP
TSF1226L
45.75MHZ
45.75MHZ
270
:CHIP
1.5k
:CHIP
22
:CHIP
2
1
3
1
2
3
4
6
5
1
2
3
4
5
6
1
3
2
4
2
1
3
2
1
3
1
2
3
*
BRT
UP
VHP
VLP
CON
UA
VHA
VLA
VCC
UH
SUD
AFC
HSYNC
H.P
M.M
FH
NC
CHCAL
STOP
MANU
CHA
CS
NC
NC
BT
U/V
BS
GND
V OUT
U OUT
NC
FILTER OUT
FILTER IN
(VIF)
(SIF)
(SIF)
AGC
AGC
RF AGC
OUT
RF AGC
DELAY
VCC
IF IN
IF IN
(VIF)
GND
VCC
SIF IN
DC F/B
GND
IF AGC
SYNC OUT
SYNC SEP
AFT COIL
REF COIL
REF COIL
DET OUT
AFT OUT
LIMITER
FM DETIN
E-VDL
AUDIO
ADJ
OUT
OUT
DEF
VIDEO
AUDIO
A.GND
AFT
LLD
T
H.P
AUDIO
D.GND
4.5V
VIDEO
A.GND
H.SYNC
VHF
IND
UP DOWN SW
30V
UB
ULOW
VLOW
VHI
ELECTRONIC TUNER
VIF,SIF
B-¥SS823.<U..>-T..
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