Sony XR-C8100 Section Mechanical Adjustments, Section Electrical Adjustments, Precaution

SECTION 4

MECHANICAL ADJUSTMENTS

PRECAUTION

1. Wipe the following components with an absorbent cotton cloth moistened with alcohol before adjustment :

PB head	Pinch roller
Idler	Rubber belt
Capstan

2.	Demagnetize the PB head using a head demagnetizer.
3.	Be careful not to use a magnetized screwdriver.
4.	After the adjustment is completed, lock the adjustment parts
	using screws.

SECTION 5

ELECTRICAL ADJUSTMENTS

See the adjustment location from on page 28 for the adjust- ment.

TAPE SECTION 0 dB = 0.775 V

Tape Speed Adjustment

Procedure :

1. Put the set into the FWD PB mode.

speed checker

5. Unless otherwise specified, make adjustments at the specified

test tape

or

voltage (14.4V).

WS-48A

frequency counter

Torque Measurement

Mode	Torque Meter	Meter Reading
FWD		35 – 65 g • cm
		(0.49 – 0.90 oz • inch)
	CQ-102C
FWD		0.5 – 5.0 g • cm
Back Tension		(0.01 – 0.07 oz • inch)
REV		35 – 65 g • cm
		(0.49 – 0.90 oz • inch)
	CQ-102RC
REV		0.5 – 5.0 g • cm
Back Tension		(0.01 – 0.07 oz • inch)
FF, REW	CQ-201B	60 – 200 g • cm
		(0.83 – 2.78 oz • inch)
Tape Tension Measurement
Mode	Tension Meter	Meter Reading
FWD	CQ-403A	more than 60 g
REV	CQ-403R	(more than 2.12 oz)

(3 kHz, 0 dB)

	10 k ½
set
LINE OUT REAR
Specification : Constant speed
Speed checker	Frequency counter
– 1 to + 2 %	2,970 to 3,060 Hz

Adjustment Location : See page 28.

DOLBY Level Adjustment

Setting :

SHIFT n 3 (PLAY MODE) (twice) button : NR off

test tape

P-4-D400level meter (400 Hz, 0 dB)

set

main board	TP230	(L-CH)
TP (DOLBY)	TP240	(R-CH)

Procedure :

1.Put the set into the FWD PB mode.

2.Adjust RV230 (L-CH) and RV240 (R-CH) so that level meter reading is – 6± 1 dB (0.35 to 0.44 V).

Adjustment Location : See page 28.

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