SONY TAE1
Instrukcja Serwisowa

TA-E1 SECTION 2 ELECTRICAL ADJUSTMENTS
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)

SECTION 3 DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION

BALANCE OUTPUT LEVEL ADJUSTMENT
� Perform this adjustment when replacing CP102. � Perform this adjustment after the idling adjustment Connection:
AF OSC attenuator LINE1 input Set Oscilloscope

PS board

MAIN board AC J board LED A board

BALANCED-OUT 2 3 pin

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 Point L-CH R-CH TP501 to TP503 TP502 to TP504 Adjusting Point RV501 RV502 Adjusting Value 50 mV ± 5 mV 50 mV ± 5 mV

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 RV402 (R-CH) so that the two waveform levels on the oscilloscope become equal and their phases are reversed. Adjusting Point L-CH Pin 2 (CH1) and Pin 3 (CH2) of CN203 Pin 2 (CH1) and Pin 3 (CH2) of CN203 Adjusting Value RV401

SW L board SW P board

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) Measuring Point L-CH R-CH Both terminals of R221 Both terminals of R222 Specified Value Within 2 mV Within 2 mV R-CH

LED B board

VOL board

RV401

Adjusting Value:
Waveform of Pin 2 (CH1)

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)

Waveform of Pin 3 (CH2) Phases of waveforms of Pins 2 and 3 should be reversed

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 � and 1/4 W or less unless otherwise � � � � 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. 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. � ® : Through hole. � b : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) Caution: Pattern face side: (Side B) Parts face side: (Side A)

Adjustment Location: [MAIN board] (Component Side)
OFFSET VOLTAGE R222 R221

Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.

RV402 BALANCE OUT LEVEL R CH

TP503 TP501 TP504 TP502

RV401 BALANCE OUT LEVEL L CH

RV501 IDLE L CH

RV502 IDLE R CH

� T : B� Line. � H : adjustment for repair. � Voltages and waveforms are dc with respect to ground in playback mode. � Voltages are taken with a VOM (Input impedance 10 M�). Voltage variations may be noted due to normal production tolerances. � Signal path. F : TUNER

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