SONY XRCA350X
Manual de Servicio

XR-CA350X SECTION 3 MECHANICAL ADJUSTMENTS
1. Clean the following parts with a denatured-alcohol-moistened swab: playback head pinch roller rubber belt capstan idler 2. Demagnetize the playback head with a head demagnetizer. 3. Do not use a magnetized screwdriver for the adjustments. 4. The adjustments should be performed with the power supply voltage (14.4 V) unless otherwise noted. Note: With this set, it is not necessary to apply suitable locking compound to the parts after the azimuth adjustment. � TORQUE MEASUREMENT
Mode Forward Torque Meter CQ-102C Meter Reading 2.46 � 5.39 mN�m (25 � 55 g�cm) (0.35 � 0.76 oz�inch) Forward Back Tension CQ-102C 0.15 � 0.39 mN�m (1.5 � 4 g�cm) (0.02 � 0.06 oz�inch) 2.46 � 5.39 mN�m (25 � 55 g�cm) (0.35 � 0.76 oz�inch) 0.15� 0.39 mN�m (1.5 � 4 g�cm) (0.02 � 0.06 oz�inch) 4.91 � 14.70 mN�m (50 � 150 g�cm) (0.69 � 2.08 oz�inch)

SECTION 4 ELECTRICAL ADJUSTMENTS
TAPE DECK SECTION
0 dB= 0.775 V

1. The adjustments should be performed in the order given in this service manual. 2. The adjustments should be performed for both L-CH and R-CH. TEST TAPE
Type P-4-A063 WS-48A Signal 6.3 kHz, �10 dB 3 kHz, 0 dB Used for head azimuth adjustment tape speed adjustment

PB HEAD AZIMUTH ADJUSTMENT Procedure: 1. Put the set into the FWD PB mode.
test tape P-4-A063 (6.3 kHz, �10 dB) 4� set
+ �

level meter

Reverse Reverse Back Tension FF, REW

CQ-102RC

speaker out terminal

CQ-102RC

2. Turn the screw and check the output peak value. Adjust the screw so that the peak value in channels L and R coincides within 3 dB.
within 3 dB output level within 3 dB

CQ-201B

� TAPE TENSION MEASUREMENT
Mode Forward Reverse Tension Meter CQ-403A CQ-403R Meter Reading more than 5.89 mN�m (more than 60 g) (more than 2.12 oz)

L-CH peak

screw position

R-CH peak L-CH peak R-CH peak

angle

3. Check the phase in the FWD PB mode.
test tape P-4-A063 (6.3 kHz, �10 dB) L-CH set 4� V + +H �� oscilloscope

R-CH

4� speaker out terminal Screen pattern

in phase 45 ° good

90 ° 135 ° 180 ° wrong

4. Repeat the above adjustment for the REV PB mode. 5. Check that output level difference between FWD PB mode and REV PB mode is within 4 dB. Adjustment Location: PB head (See page 13)

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