Panasonic ST-HD501V Service Manual ▷ View online
5 Operation Checks and Component Replacement
Procedures
7
ST-HD501V
6 Wiring Connection Diagram
E
CONNECTOR
P.C.B.
P.C.B.
F
MAIN P.C.B.
D
IN/OUT TERMINAL P.C.B.
B
FL P.C.B.
C
OPERATION P.C.B.
A
TUNER P.C.B.
CN105B
CN105A
CN103A
CN101A
CN102A
CN104A
CN104B
CN101B
CN102B
CN103B
AM /FM ANT
CN702A
CN701A
(IN)
(OUT)
EXT
To CD PLAYER /
CASSETTE DECK
CASSETTE DECK
To AMPLIFIER
CN702B
CN701B
CN703A
1
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7
7
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1
7
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1
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1
1
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7
1
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7
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7
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7
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7
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5
2 . . . . . 14
1 . . . . . 13
2 . . . . . 14
1 . . . . . 13
2 . . . . . 14
1 . . . . . 13
2 . . . . . 14
1 . . . . . 13
CN703B
1
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5
ST-HD501V
8
7.1. Schematic Diagram Notes
Notes:
·
S601: AM band select (AM) switch.
·
S602: FM band select (FM) switch.
·
S603: FM mode select (AUTO/MONO) switch .
·
S604: Tuning mode (TUNE MODE) switch .
·
S605: Tuning/time adjust (
) switch.
·
S606: Tuning/time adjust (
) switch.
·
S607: Set (SET) switch .
·
S608:
Clock/timer,
demo
(CLOCK/TIMER/-DEMO)
switch .
·
S609: Record timer (
REC) switch.
·
S610: Play timer (
PLAY) switch.
·
Indicated voltage values are the standard values for the
unit measured by the DC electronic circuit tester (high-
impedance)
unit measured by the DC electronic circuit tester (high-
impedance)
with the chassis
taken
as standard.
Therefore, there may exist some errors in the voltage
values, depending on the internal impedance of the DC
circuit tester.
values, depending on the internal impedance of the DC
circuit tester.
No mark: FM mode
( ): AM mode
Important safety notice:
Components
identified
by
mark
have
special
characteristics impotant for safety.
Furthermore, special parts which have purpose of fire-
retardant (resistors), high-quality sound (capacitors), low-
noise (resistors), etc. are used. When replacing any of
components, be sure to use only manufacturer’s specified
parts shown in the parts list.
retardant (resistors), high-quality sound (capacitors), low-
noise (resistors), etc. are used. When replacing any of
components, be sure to use only manufacturer’s specified
parts shown in the parts list.
Caution!
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during
repair.
repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
Put a conductive mat on the work table.
Do not touch the legs of IC or LSI with the fingers directly.
Voltage and signal line
: Positive voltage line
: FM signal line
: AM signal line
: Negative voltage line
: FM OSC signal line
: AM OSC signal line
7 Schematic Diagram Notes
·
This schematic diagram may be modified at any time with development of new technology.
7.2. Type Illustration of Transistors and Diodes
M5218AFPE3
LA1833MN-TLM
LC72131MDTLM
LA1833MN-TLM
LC72131MDTLM
8PIN
24PIN
20PIN
20PIN
2SC3940AQSTA
2SD1819ATX
UN5214TX
UN5214TX
No.1
E
C
B
E
C
B
. . . .
. . . .
. . .
....
....
....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
No.1
M62433AFP
M30218MAA105
M30218MAA105
80PIN
100PIN
2SB1417PQTA
2SD2137PQTA
2SD2137PQTA
DTB123YSTP
DTC114ESTP
DTC143XSTP
DTC114ESTP
DTC143XSTP
E
C
B
2SC2787LTA
2SC3311ATA
2SC3311ARSTA
UN4111TA
UN4115TA
2SC3311ATA
2SC3311ARSTA
UN4111TA
UN4115TA
E
C
B
MA719TA
A
Ca
Anode
Cathode
A
Ca
MA4043MTA
MA4051MTA
MA4075HTA
MA4082LTA
MA4051MTA
MA4075HTA
MA4082LTA
MA111TX
1SS380TE-17
A
Ca
A
Ca
Ca
A
Anode
Cathode
MA185TA
A
Ca
Ca
A
Anode
Cathode
MA165TA
A
Ca
Ca
A
Anode
Cathode
Anode
Cathode
C
E
B
A
Ca
9
ST-HD501V
8 Schematic Diagram
2SC1675LIL2
BUFFER AMP
(LOCAL OSC)
(LOCAL OSC)
2SC2786M
FM MIXER
2SK544F
RF AMP
SCHEMATIC DIAGRAM 1
2
3
4
5
1
7
8
6
1
2
3
4
5
6
A
Ca
A
AM ANT
AM OSC
1
2
3
4
5
6
Z101
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
XI
N
CE
DI
CL
DO
AM
LW
SDC
STRQ
FM
IF
IN
MONO
AM
IN
FM
IN
V
DD
PD
AI
N
A
OUT
Vss
X
OUT
100K
2.7K
2.2P
4.7P
2.2P
560K
390
680K
390
390
1000P
10P
R103
270
C101
0.01
C102
16V10
3.3P
10P
820K
180P
2.2P
220
100K
1000P
100K
5.6P
Z120 FM FRONT END(RAL0006)
R110
1K
C107
0.047
R1
12
100K
C108
8.2P
C136
1000P
A
B
C
D
R111
390
R128
82
R129
27K
C124
100P
100P
C112
0.01
R1
15
560
R116
1K
C1
1
1
25V4.7
D101
MA4051MT
A
R1
13
10K
C133
27P
C134
27P
X103
(7.2MHz)
R1
17
47K
C130
6.3V100
C132
1000P
C1
13
1000P
R132
10K
R133
1K
R138
3.3K
R130
10K
R137
1K
R136
1K
R135
1K
R134
470
A
B
C
D
C125
16V22
R114
5.6K
C1
10
0.01
A
B
C
D
E
F
AM ANT
EXT
LOOP
FM ANT
GND
75
JK101
IC102
LC72131MDTLM
LC72131MDTLM
PLL FREQUENCY
SYNTHESIZER
SYNTHESIZER
TUNER CIRCUIT
A
L102
0.68
H
L101
0.68
H
L103
0.47
H
0.47
H
1.2
H
NOTE:
The number which noted at the connectors on the schematic diagram as
"SCHEMATIC DIAGRAM 1" or "SCHEMATIC DIAGRAM 2"
indicates the schematic diagram serial number located on the left corner in the schematic diagram.
For [GC] area.
0V
(0V)
4.1V
2.5V
5.2V
0.9V
2.9V
2.6V
(2V)
0.9V
0V
(2.5V)
(0V)
0V
(14.8V)
0V
3.7V
(4.2V)
(4.2V)
3.7V
(0V)
(0V)
1.2V
0V
0V
0V
2.6V
FM/AM
F=7.2MHz
2.2V
P P
F
87.5MHz
108MHz
2.7V
9.8V
[ FM ]
V
F
522kHz
1629kHz
1V
5.1V
[ AM ]
V
FM/AM
F=7.2MHz
2V
P P
: POSITIVE VOLTAGE LINE
: FM SIGNAL LINE
: FM OSC SIGNAL LINE
: AM SIGNAL LINE
: AM OSC SIGNAL LINE
ST-HD501V
10
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