Sony TA-E1 User Manual
TA-E1
SERVICE MANUAL
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
MICROFILM
STEREO PRE AMPLIFIER
1
SAFETY CHECK-OUT
TABLE OF CONTENTS
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.
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 microampers). 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.
2. A battery-operated AC milliammeter. The Data Precision 245
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)
To Exposed Metal
Parts on Set
1. GENERAL ........................................................................... 3
2. ELECTRICAL ADJUSTMENT .................................... 5
3. DIAGRAMS
3-1. Circuit Boards Location ........................................................ 5
3-2. Schematic Diagram – Main Section (1/3) –..........................6
3-3. Schematic Diagram – Main Section (2/3) –..........................7
3-4. Schematic Diagram – Main Section (3/3) –..........................8
3-5. Printed Wiring Board – Main Section –................................ 9
3-6. Schematic Diagram – Power Section –............................... 10
3-7. Printed Wiring Board – Power Section –............................ 11
4. EXPLODED VIEWS
4-1. Top Plate and Back Panel Section....................................... 12
4-2. Front Panel Section ............................................................. 12
4-3. Bottom Plate Section .......................................................... 13
5. ELECTRICAL PARTS LIST ................................... 14
0.15µF
Ω
1.5k
Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT . NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.
PARTS No. MODEL
4-214-526-1π US , CND
4-214-526-2π AEP, UK, E, AUS
• Abbreviation
CND : Canadian model
AUS : Australian model
2
SECTION 1
GENERAL
This section is extracted from
instruction manual.
3
4
SECTION 2
MAIN board
SW L board
AC J board
LED A board
LED B board
SW P board
PS board
VOL board
ELECTRICAL ADJUSTMENTS
TA-E1
SECTION 3
DIAGRAMS
IDLING ADJUSTMENT AND OFFSET VOLTAGE
CHECK
• Perform this adjustment after replacing CP103 and CP104.
• Perform this adjustment more than 10 minutes after supplying
the power.
Connection:
Digital voltmeter
MAIN board
TP501 (L-CH), TP502 (R-CH)
TP503 (L-CH), TP504 (R-CH)
Procedure:
1. Connect the digital voltmeter as shown above.
2. Adjust RV501 (L-CH) and RV502 (R-CH) of the MAIN board
so that the digital voltmeter reads 50 mV ±5 mV. (Idling adjustment)
Measuring Adjusting Adjusting
Point Point Value
L-CH TP501 to TP503 RV501 50 mV ± 5 mV
R-CH TP502 to TP504 RV502 50 mV ± 5 mV
3. Measure the voltage of both terminals of R221 (L-CH) and R222
(R-CH) of the MAIN board, and check that the voltage is within
2 mV.
(Offset voltage check)
BALANCE OUTPUT LEVEL ADJUSTMENT
• Perform this adjustment when replacing CP102.
• Perform this adjustment after the idling adjustment
Connection:
AF OSC
attenuator
LINE1 input
Set
BALANCED-OUT 2 3 pin
Procedure:
1. Connect as shown above.
2. Rotate the INPUT SELECTOR knob, and set the input source
to LINE 1 .
3. Set the input level so that the oscilloscope waveform level becomes approx 3 V.
4. Adjust RV401 (L-CH) and R V402 (R-CH) so that the two waveform levels on the oscilloscope become equal and their phases
are reversed.
Adjusting Point Adjusting Value
L-CH Pin 2 (CH1) and RV401
Pin 3 (CH2) of CN203
R-CH Pin 2 (CH1) and RV401
Pin 3 (CH2) of CN203
Oscilloscope
3-1. CIRCUIT BOARDS LOCATION
Measuring Point Specified Value
L-CH Both terminals of R221 Within 2 mV
R-CH Both terminals of R222 Within 2 mV
Adjusting V alue:
Phases of waveforms of
2
Pins
Adjustment Location:
[MAIN board] (Component Side)
OFFSET
R222
VOLTAGE
R221
RV402
BALANCE OUT
LEVEL R CH
RV401
BALANCE OUT
LEVEL L CH
TP503
Waveform of
2
(CH1)
Pin
Waveform of
3
(CH2)
Pin
and 3 should be reversed
TP501 TP504 TP502
RV501
IDLE
L CH
RV502
IDLE
R CH
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
• % : indicates tolerance.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note:
The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part
number specified.
• S : B+ Line.
• T : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground in
playback mode.
• V oltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Signal path.
F : TUNER
4
W or less unless otherwise
Note:
Les composants identifiés par
une marque ! sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
For printed wiring boards.
Note:
• X : parts extracted from the component side.
®
•
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
: Through hole.
55
TA-E1
3-2. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) –
• Refer to page 9 for Printed Wiring Board.
(Page 7) (Page 7) (Page 7)
(Page 10)
(Page 8)
(Page 7)
6
6
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