See the adjustment location from on page 22 for the ad- justment.

TAPE DECK SECTION

 

0 dB=0.775 V

 

 

 

Tape Speed Adjustment

Procedure:

1. Put the set into the FWD PB mode.

 

 

 

 

 

 

 

 

 

 

speed checker

 

 

 

 

 

 

 

 

 

 

 

or

test tape

 

 

 

 

 

frequency counter

 

 

 

 

 

 

 

 

WS-48A

 

 

 

 

 

 

 

 

(3 kHz, 0 dB)

 

 

 

 

10 k

 

 

 

 

 

 

set

 

 

 

 

 

– +

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LINE OUT

Specification: Constant speed

 

 

 

 

 

 

 

 

 

 

 

 

Speed checker

 

 

 

Frequency counter

–1.5 to +2.5%

 

 

 

 

2,955 to 3,075Hz

Adjustment Location: See page 22.

 

 

 

 

 

DOLBY Level Adjustment

 

 

 

 

 

 

 

Setting:

 

 

 

 

 

 

 

 

Preset 3 (DOLBY) button

:

 

OFF

SEL (BAS) button

 

:

 

Center

SEL (TRE) button

 

:

 

Center

SEL (BAL) button

 

:

 

Center

SEL (FAD) button

 

:

 

Center

SEL (VOL) button

 

:

 

Maximum

D-BASS control

 

:

 

OFF

 

 

 

 

 

main board

 

L-CH: IC301 7

test tape

TP (DOLBY )

R-CH: IC301

P-4-D400

 

 

 

 

level meter

 

 

 

 

 

(400Hz, 0dB)

 

 

 

 

 

 

 

 

 

 

 

 

 

set

+

 

 

main board

 

TP (GND)

Procedure:

1.Put the set into the FWD PB mode.

2.Adjust RV231 (L-CH) and RV131 (R-CH) so that the level meter reading is –6±0.5 dB (0.37 to 0.41 V).

Adjustment Location: See page 22.

TUNER SECTION

(XR-C450: E, Saudi Arabia model only)

0dB=1µV

Cautions during repair

When the tuner unit is defective, replace it by a new one because its internal block is difficult to repair.

FM Auto Scan/Stop Level Adjustment

Setting:

SOURCE button

 

 

 

 

 

 

 

 

: FM

FREQUENCY SELECT switch : 10 k

FM RF signal

 

 

 

 

 

 

 

 

 

 

 

 

generator

 

 

 

 

 

 

antenna jack (J1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.01 F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

set

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Carrier frequency : 97.9 MHz

Output level

: 22 dB (12.6 V)

Mode

: mono

Modulation

: 1 kHz, 75 kHz deviation

Procedure:

1.Set to the test mode. (See page 19).

2.Push the SOURCE button and set to FM.

Display

FM

SHUF1

3.Push the preset 3 button.

Display

FM

SHUF1

4.Adjust with the volume RV2 on TU1 so that the “FM” indica- tion turns to “FM0” indication on the display window.

But, in case of already indicated “FM0”, turn the RV2 so that put out light “0” indication and adjustment.

Display

SHUF1

Adjustment Location: See page 22.

– 20 –

Page 20
Image 20
Sony XR-C440 service manual DB=0.775, Tape Speed Adjustment, Speed checker Frequency counter, Dolby Level Adjustment