Sony SA-WD100 Service Manual ▷ View online
2
SA-WD100
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
0
OR DOTTED LINE WITH
MARK
0
ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE
0
SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Kee p the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15 µF
1.5 kΩ
AC
Voltmeter
(0.75 V)
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
Ver 1.1 2002.11
3
SA-WD100
SECTION 1
DIAGRAMS
Note on Printed Wiring Board:
•
•
X : parts extracted from the component side.
•
a
: Through hole.
•
b : Pattern from the side which enables seeing.
• Indication of transistor
B
These are omitted.
C
E
Q
Note on Schematic Diagram:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
2
: nonflammable resistor
•
C
: panel designation
•
A
: B+ Line
•
B
: B– Line
• Voltages are dc with respect to ground under no-signal
conditions.
• Voltages are taken with a VOM (input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path
F
: AUDIO
• Abbreviation
CND : Canadian model
SP
SP
: Singapore model
CH
: Chinese model
• Circuit Boards Location
MAIN POWER board
INPUT
SELECT board
SELECT board
INPUT board
CONTROL board
POWER SWITCH board
AUTO POWER board
LED board
Note:
Les composants identifiés
par une marque
par une marque
0
sont cri-
tiques pour la sécurité.
Ne les remplacer que par
une piéce portant le numéro
spécifié.
Ne les remplacer que par
une piéce portant le numéro
spécifié.
Note:
The components identified
by mark
by mark
0
or dotted line
with mark
0
are critical for
safety.
Replace only with part
number specified.
Replace only with part
number specified.
Ver 1.1 2002.11
4
SA-WD100
• IC Block Diagrams
IC901
STR-F6426S (US, CND)
IC901
STR-F6676 (AEP, UK, SP, CH)
5
4
3
2
1
OSC
DRIVE
ICONST
START
REG.
T.S.D.
LATCH
O.V.P.
D
S
GND
VCC
FB/OCP
COMP.1
COMP.2
5
4
3
2
1
OSC
DRIVE
START
REG.
T.S.D.
LATCH
O.V.P.
D
S
GND
VCC
FB/OCP
COMP.1
COMP.2
Ver 1.1 2002.11
5
5
SA-WD100
1-1. Printed Wiring Board – Control Section – •
See page 3 for Circuit Boards Location.
IC304
IC302
IC301
IC102
IC103
IC101
LEVEL
Ref. No.
Location
D101
B-6
D102
B-5
D103
B-6
D104
B-5
D105
A-6
D106
A-6
• Semiconductor Location
Ref. No.
Location
IC101
B-6
IC102
A-6
IC103
B-6
IC301
A-3
IC302
B-3
IC304
A-1
Ref. No.
Location
Q101
D-6
Q102
D-6
Q103
D-6
Q104
D-5
Q105
D-6
Q301
A-2
Q302
A-2