6. ELECTRICAL PARTS LIST........................................ 29
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.
AN ISOLATION TRANSFORMER SHOULD BE USED DURING ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD, BECAUSE OF LIVE CHASSIS.
THE CHASSIS OF THIS RECElVER IS DIRECTLY CONNECTED TO THE
AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE
CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS
WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN
THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT
ADJUSTMENTS THAT ARE CRITICAL TO SAFEOPERATION ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERA-
TION IS SUSPECTED.
(CAUTION)
WARNING!!
– 2 –
SECTION 1
GENERAL
The operating instructions mentioned here are partial abstracts from the
Operating Instructions Manual. The page numbers of the Operating
Instruction Manual remain as in the manual. (Part no : 4-083-376-11)
– 3 –
– 4 –
SECTION 2
DISASSEMBLY
2-1. CABINETS
1. Remove the battery cover 8.
2. Push two claws with a screwdriver or equivalent on the bottom and
remove them.
FDL-PT222
1 front cabinet
2 channel button
3 B board
claw
3. While pushing the rear cabinet, remove claws of joints with
the front cabinet.
4. Insert a screwdriver or equivalent to the gap on the upper side of the
cabinet, and while pushing the lock spring, put it down to the rear cabinet
side.
5. Remove the channel button 2.
6. Disconnect CN501 (for speaker) on the A board.
7. Remove the B board 3 and the A board 4.
8. Remove solder for the lead wire (BLK) 9.
9. Remove a screw (+PTP2X6) 6 secured the T board 5.
10. Release the T1 board 5 from two claws (right and left) on the rear cabinet.
front cabinet
rear cabinet
lock spring
6 screw (+PTP2X6)
9 lead wire (BLK)
4 A board
5 T1 board
claw
7 rear cabinet
8 battery cover
– 5 –
FDL-PT222
2-2. SERVICE POSITION
Cable for service
1-900-211-84
CN602
B board
CN301
AC power adaptor
J101
Mini-jack
CN601
A board
Cable for service
1-900-211-84
T1 board
CN201
Antenna
– 6 –
SECTION 3
CIRCUIT ADJUSTMENTS
FDL-PT222
3-1.A BOARD ADJUSTMENT
[+4.5V ALIGNMENT (RV601)]
Using a digital voltmeter measuring the voltage between
JL32 (+4.5V) and JL33 (GND). Adjust RV601 to obtain
the value shown below.
Standard Value = 4.45V± 0.05VDC
S601 position = UHF position
[+30.0V CHECK]
Check the voltage across JL29 (+30.0V) and JL33 (GND) .
Standard Value = 30.5V±1.5VDC
[AUDIO OUTPUT CHECK]
1. Feed the audio signal 1kHz 100% modulated.
2. Set RV501 to maximum.
3. Connect an oscilloscope between JL23 (SP) and JL15 (SP
GND).
4. Check the waveform on the oscilloscope becomes the standard value.
Standard Value = 1.5V-2.8Vp-p
[VIF.AFT COARSE ADJUSTMNT (T201, T202)]
[SETUP]
1. Set S601 on the A board to VHF position.
2. Apply no signal to JL18 (RF).
3. Connect a 1 kΩ resistor between JL77 (+4.5V) and
JL28 (RF AGC).
4. Apply a sweep signal across JL26 (IF) and JL27(IF GND).
(Fig. 3-1)
Note : Set the sweep signal for JL26 to -30±5dBm. Keep the
distance to the ATT output JL26 as short as possible.
0.01µF
SWEEP
MARKER
GENERATOR
fo=45.75MHz±5kHz
ATT
JL26
75Ω 6dB
Fig. 3-1
3-2.T1 BOARD ADJUSTMENT
- T1 board - (Component side)
T201
T202
RV201
RV002
RV004
RV001
TU101
[ADJUSTMNT]
1. Connect an oscilloscope between JL72 (VIDEO) and JL71
(A.GND) and apply an external voltage (MGC) to JL26 to
obtain a waveform as shown in Fig. 3-2 (make sure not to
clip the extremely short portion).Adjust T202 so that the position at 45.75 MHz is the lowest point.
Note : Align JL51 (MGC) external voltage for approximately
a 1.0 Vp-p. Make sure that the JL51 (MGC) external
voltage does not exceed 4.3VDC.
2. Remove the external voltage (MGC) from JL51.
3. Connect an oscilloscope between JL31 (AFT) and JL30
(D.GND) and make a coarse adjustment of T201 so that wav eform is close to zero at the 45.75 MHz position.
4. Remove the 1 kilohm resistor connected between JL77 (+4.5V)
and JL28 (RF AGC).
1Vp-p
45.75MHz
– 7 –
0
Fig. 3-2
FDL-PT222
[AFT FINE ADJUSTMENT(T201)]
1. Connect a 1 kilohm resistor between JL77 (+4.5V) and JL28
(RF AGC).
Note : Perform this adjustment as the last step in the
process since drift may occur due to aging.
2. Switch the sweep signal to CW.
fo= 45.75 MHz±5 kHz, -30±5dBm
Apply the abov e signal between JL26 (IF) and JL27 (IF GND)
and then make a fine adjustment of T201 so that the level be-
tween JL31 (AFT) and JL30 (D.GND) reaches2.2V±0.4VDC.
3. Remove the 1 kilohm resistor connected between JL77 (+4.5V)
and JL28 (RF AGC).
[RF. AGC ADJUSTMENT (RV201)]
1. Set S601 to VHF position and recei ve a VHF color bar signal
issued from a signal generator.
2. Adjust RV201 and align the screen for the optimal point so
that the snow noise disappears.
[CHANNEL DISPLAY POSITION ADJUSTMENT
(RV001, RV002, RV004)]
1. Set S601 to VHF position, a potentiometer (47kΩ±15kΩ)
across JL25(CS) and JL77 (+4.5 V) as sho wn in Fig. 2-6 and
short the points JL21(CH CAL) and JL30 (D.GND).
2. Receive channel 2 and align the channel display positions with
RV002(VP).
3. Receive channel 13 and align the display bar with R V004(VA).
4. Align while performing tracking to mutual interference in the
above steps 2 and 3.
5. Receive channels 3 & 4 and confirm that the display bar is
within the standards.
6. Set S601 to UHF.
7. Receive channel 14 and align the display position with
RV001(UP).
8. Receive channel 69 and confirm that the display bar is within
the standards.
Once again receive channel 14 and confirm that the display
bar is within the standards.
Note : Use caution since shifting channel 69 will also
cause channel 14 to shift.
9. Remove the potentiometer (47kΩ+15kΩ) you connected between JL25(CS) and JL77(+4.5V). Also remov e the short you
connected between points JL21 (CH CAL)and JL30(D.GND).
JL25 (CS)
JL77(+4.5V)
Display bar
3-3.B BOARD ADJUSTMENT
- B board (Component side)
RV301
RV402
[CONTRAST ADJUSTMENT (RV402)]
1. Receive the stepped waveform signal in 10 steps.
2. Observe the waveform across JL83(G) and JL67(GND).
3. Check the contrast changes by turning RV402.
4. Connect an oscilloscope between JL84 (AUTO CB) and JL67
(D. GND) and adjust R V402 so that the v oltage of A portion
becomes 2.2+-0.2V.
5. Check the waveform as shown in Fig. 3-5.
6. At the same time, check the points C and D are within the
period as shown in Fig. 3-5.
100 IRE
JL83
0 IRE
JL84
C
A=2.2
±
Fig. 3-5
[COLOR PHASE (TINT) ADJUSTMENT (RV301)]
1. Receive the color bar signal from the signal generator.
2. Observe the waveform across JL81(B) and JL67(D.GND).
3. Adjust RV301 (TINT) so that the waveform level becomes as
shown in Fig. 3-6.
Contrast changes
D
0.2VDC
15kΩ
Fig. 3-3
Channel No.
6
VR(47kΩ)
*Channel No. and display
bar are to be in line.
Fig. 3-4
Fig. 3-6
– 8 –
4-1. BLOCK DIAGRAM (1)
SECTION 4
DIAGRAMS
STRAP
ANTENNA
J101
EXT ANT
TU101
TUNER
ANT
AGC
IF
UB
HB
LB
MB
BALUN
T101
+4.5V
CN201
UB12
2
VHF
3
H.P
IC201 VIF/SIF DET
IF
IF
RF AGC
INV.
Q205
CF202
AFT
6
7
3
4RV201
14
15
16
23
17
21
IF
IF
AGC OUT
AGC DL
E-VDL
FM DET
LIM
SYNC
AFT
AFT COIL
IF AMP
AGC IF
FM
DET
SYNC
SEP
AFT
DET
AMP
REF COIL
REF COIL
AUDIO
SIF
DET OUT
SYNC SEP
VIDEO
BUFFER
LIMITER10
VIDEO
LLD
19
20
13
AUDIO
AUDIO
5
AUDIO
TO
A BOARD
CN502
CF203
AUDIO
VIDEO
CF201
BUFFER
Q202
18
22
9
VIDEO
IF
IF AMP
Q201
IF
FILTER
SWF201
IC001
SWITCH
Q010-012
TUNER CONTROOL
BS
28
U/V
27
BS
COMPOSITION
BAND
SELECT
TUNING
CONTROL
BAND
SELECT
AUTO
RETURN
3
HP
COMPARATOR
DEFEAT
OUTPUT
SIGNAL
DEFECT
DEF
H SYNC
AFC
SUD
14
FH
1
4
5
6
FH SWITCH
Q005
Q007
AFC SWITCH
TU
CHANNEL DISPLAY
CHANNEL DISPLAY
POSITION CH1
CHANNEL DISPLAY
POSITION CH12
BUFFER
Q001
RV001
POSITION CH13
RV002
V LOW
RV004
V HI
AMP
Q002
7
H SYNC
BT
26
UP
18
UA
22
20
VLP
19
VHP
23
VHA
24
VLA
BT
GEN.
INITIAL
SET
BAR
DISPLAY
POSITION
ADJUST
CHARGE/
DISCHARGE
CIRCUIT
BAR
OUTPUT
8
CS
10
V
30
U
31
INV., SWITCH
Q003,004
IND
UP DOWN SW11
T1 (TUNER, VIF/SIF DET)
– 9 –
– 10 –
4-2. BLOCK DIAGRAM (2)
TO
T1 BOARD
CN201
UB12
VHF
H.P
AUDIO
VIDEO
CN502
2
3
5
9
AUDIO
+4.5V
RV501
VOL
S601
(1/2)
IC501 HEADPHONE AMP
3
2
VCC
IC401
MONITOR CONTROL
CN601CN301
VHF
H.P
2
3
2
3
UHF
VHF
OFF
AUDIO
6
V+
7
AUDIO
J501
2
SPEAKER
VIDEOVIDEO
VIDEO
9
9
VIDEO
BUFFER
Q403
SYNC. SEP.
Q303
4037R2
34
HSO
V IN
CL2
CLB
CLA
BESTB
TPR1B
CP
D2
D3
D4
D1
DB 10
1
2
3
4
5
6
7
8
9
12
VM BUFFER
13TPR1
Q407
SWITCH
Q406
CL2
CL2
CLB
CLB
CLA
CLA
RES
RES
TPR2
TPR1
VSS
24
CP
40
CP
22
38
21
37
20
36
D2
12
D2
28
D3
11
D3
27
10
D4
26
D1
9
D1
25
13
29
2
6
VM
23
VM
39
VM
4
3
LCD
MONITOR
H SYNC
IND
UP DOWN SW 11
BATTERY
J701
DC IN 4.5V
7
8
S601
(2/2)
UHF
VHF
OFF
S001S002
-
CH
D701
H SYNC
7
T601
9
RV601
+4.5V
RV450
PORT SWITCH
Q601-603
BUFFER
Q401
BRT
DRIVE
Q701
DRIVE
Q702
F601
+4.5V
+
8
4
+30V
T701
3
2
4
1
5
+30V
1
+4.5V
6
7
3
1111BRT
8
6
IND
FR701
LCD
BACK LIGHT
7
88
IND SWITCH
Q408
IC301 Y/C JUNGLE
VIDEO IN
29
SYNC SEP
TINT CONT
1910
RV301
TINT
3.58MHz
VCXO IN
2111
VCXO OUT
2312
X301
HD IN
CONTRAST
R OUT
G OUT
B OUT
51
INV.
Q302
35 H IN
38 INB
R40
AUTO CB
23
R IN
28
G IN
29
27
B IN
XT1
XTD
20
21
30TGL VL
BUFFER
Q402
X401
4.5MHz
RV402
CONTRAST
VDG
VDR
VDG
VDR
VDB
VDB
VS2
VS2
17
18
33
34
16
32
15
31
A (POWER SUPPLY, LCD BACK LIGHT, HEADPHONE AMP)
– 11 –
B (Y/C JUNGLE, MONITOR CONTROL)
– 12 –
MEMO
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
C2C1(B2)
E2
B1
C1
C2E1(B2)
C2
B1
C1
E2E1(B2)
C2
B1
C1
E2
B2
E1
C2
Ver.1.5
Transistor
(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
DevicePrinted symbolTerminal name
Circuit
Terminal name of semiconductors in silk screen
printed circuit (
*
)
Anode
Anode
Anode Cathode
Anode Anode
Cathode
!£
Transistor
(FET)
Transistor
(FET)
!∞
Emitter
Collector
Base
Transistor
Source
Gate
Drain
Cathode
Anode
Anode
Cathode
Anode
Anode
4-3. CIRCUIT BOARDS LOCATION
Note: The symboldisplay is on the component slde.
The components identified by shading and mark
are critical for safety. Replace only with part number
B
specified.
The symbolindicate fast operating fuse.
Replace only with fuse of same rating as maked.
T1
A
4-4. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
Note:
• Capacitors without voltage indication are all 50V.
• All resistors are in ohms.
kΩ=1000Ω, MΩ=1000kΩ
• Indication of resistance, which dose not have one for rating electrical power, is
as follows.
Pitch : 5mm
Rating electrical power :
•
•
•
•
: nonflammable resistor.
: fusible resistor.
: internal component.
: panel designation and adjustment for repair.
• All variable and adjustable resistors have characteristic curve B, unless otherwise
noted.
•
: earth-chassis.
• As to the voltage volue shown by the semiconductors on the Shematic Diagram,
see the another list
• Readings are taken with a color-bar signal input.
• Readings are taken with a 10MΩ digital multimeter.
• Voltages are dc with respect to ground unless otherwise noted.
• Voltage variations may be noted due to normal production tolerances.
seldom required for routine service. Some delay
should be anticipated when ordering these
items.
• All variable and adjustable resistors have
characteristic curve B, unless otherwise noted.
RESISTORS
• All resistors are in ohms
• F : nonflammable
• CAPACITORS
PF : µµ F
• There are some cases the reference
number on one board overlaps on the
other board. Therefore, when ordering
parts by the reference number, please
include the board name.
RB4011-236-416-11 NETWORK, RES 2.2K
RB4021-236-416-11 NETWORK, RES 2.2K
RB4031-236-416-11 NETWORK, RES 2.2K
RB4041-236-416-11 NETWORK, RES 2.2K
RB4051-236-416-11 NETWORK, RES 2.2K
– 31 –
FDL-PT222
A
The components identified by
shading and mark
cal for safety.
Replace only with part number
specified.
! are criti-
REF. NO. PART NO.DESCRIPTIONREMARK
–––––––– –––––––––––––––––––––––––––––––
<VARIABLE RESISTOR>
R V3011-223-588-11 RES, ADJ, CARBON 47K (TINT)
R V4021-223-588-11 RES, ADJ, CARBON 47K (CONTRAST)