Sony Ericsson XR-C7500RX service manual Tape Deck Section, Tuner Section, Tape Speed Adjustment

TAPE DECK SECTION

Tape Speed Adjustment

Setting:

test tape WS-48A

(3 kHz, 0 dB)

set

0 dB=0.775 V

speed checker

or

frequency counter

10 k Ω

–+

Adjustment Location:

– SET UPPER VIEW –

Tape Speed Adjustment

TUX1

LINE OUT REAR jack (CN13)

Procedure:

1.Put the set into the FWD PB mode.

2.Adjust adjustment resistor for inside capstan motor so that the reading on the speed checker or frequency counter becomes in specification.

Specification: Constant speed

Speed checker	Frequency counter
–1.5 to +2.5%	2,955 to 3,075 Hz

RV240

Dolby Level Adjustment (R-CH)

RV230

Dolby Level Adjustment (L-CH)

Dolby Level Adjustment
Setting:
[MENU] button	: ON (light up SET UP and
	PLAY MODE)
Preset [DISC +]
t [+>M] (t) buttons	: NR off	– SET BOTTOM VIEW –
[DSO] (BAS, TRE) button	: off
[SOUND] (BAL) button	: Center
[SOUND] (FAD (Front)) button	: Center
[SOUND] (FAD (Rear)) button	: Center
VOLUME CONTROL dial	: Maximum

test tape	MAIN board
P-4-D400	      
(400Hz, 0 dB)	TP (DOLBY-L)/	level meter
	TP (DOLBY-R)
set		+
		–

Procedure:

1.Put the set into the FWD PB mode.

2.Adjust RV230 (L-CH) and RV240 (R-CH) so that the level meter reading is –6±0.5 dB (0.37 to 0.41 V).

TUNER SECTION

Tuner section adjustments are done automatically in this set.

TP (DOLBY-R)  Dolby Level TP (DOLBY-L) Adjustment

TP (GND)

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