DOWNLOAD Sony CX-LFA700 / XR-FA700 Service Manual ↓ Size: 5.72 MB | Pages: 53 in PDF or view online for FREE

2.94 – 7.84 mN • m

(30 to 79 g • cm)

(0.42 – 1.11 oz • inch)

0.15 – 0.59 mN • m

(2 to 6 g • cm)

(0.03 – 0.08 oz • inch)

0.15 – 0.59 mN • m

(2 to 6 g • cm)

(0.03 – 0.08 oz • inch)

0.15 – 0.59 mN • m

(2 to 6 g • cm)

(0.03 – 0.08 oz • inch)

6.86 – 17.64 mN • m

(70 to 179 g • cm)

(0.98 – 2.49 oz • inch)

9.8 mN • m or more

(100 g • cm or more)

(1.4 oz • inch or more)

9.8 mN • m or more

(100 g • cm or more)

(1.4 oz • inch or more)

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

1.

Clean the following parts with a denatured alcohol-moistened
swab:

record/playback heads

pinch rollers

erase head

rubber belts

capstan

idlers

2.

Demagnetize the record/playback head with a head demag-
netizer.

3.

Do not use a magnetized screwdriver for the adjustments.

4.

After the adjustments, apply suitable locking compound to the
parts adjusted.

5.

The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

Procedure:
1.

Mode : Playback

2.

Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1 dB of peak.

P-4-A100

WS-48B

10 kHz, –10 dB

3 kHz, 0 dB

Azimuth Adjustment

Tape Speed Adjustment

1.

Demagnetize the record/playback head with a head demagnetizer.

2.

Do not use a magnetized screwdriver for the adjustments.

3.

After the adjustments, apply suitable locking compound to the
parts adjusted.

4.

The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

5.

The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)

6.

The adjustments should be performed for both L-CH and R-
CH.

7.

Switches and controls should be set as follows unless otherwise
specified.

4.

After the adjustments, apply suitable locking compound to the
parts adjusted.

Adjustment Location: Record/Playback/Erase Head

Procedure:
1.

Turn the power on.

2.

Insert the WS-48B into deck.

3.

Press the  Y  button of deck.

4.

Check the reading of frequency counter becomes 3000 ± 90 Hz.

W.RMS (JIS) less than 0.3%
(test tape: WS-48B)

3.

Mode: Playback

°

°

°

°

Procedure:
1.

Connect an oscilloscope to test point TP (RF) and TP (VC) on
the CD board.

2.

Turn the power on.

3.

Put the disc (YEDS-18) in to playback the number five track.

4.

Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.

A clear RF signal waveform means that the shape “

◊” can be clearly

distinguished at the center of the waveform.

Checking Location: CD board (Conductor side)

1. CD Block is basically designed to operate without adjustment. There-

fore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M

Ω impedance.

4. Clean the object lens by an applicator with neutral detergent when the

signal level is low than specified value with the following checks.

Procedure:
1.

Connect an oscilloscope to test point TP (FE) and TP (VC) on
the CD board.

2.

Turn the power on.

3.

Put the disc (YEDS-18) in and turned power switch on again
and actuate the focus search. (actuate the focus search when
disc table is moving in and out)

4.

Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 2 ± 1
Vp-p.

• Try to measure several times to make sure than the ratio of A : B

or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the

brightness to obtain best waveform.

Checking Location: CD board (Conductor side)

±

±

Procedure:
1.

Connect an oscilloscpe to test point TP (TE) and TP (VC) on
the CD board.

2.

AC is put in pushing  CD 

u

  button.

3.

FL tube carries out all lights and goes into CD test mode.

4.

Put the disc (YEDS-18) in to playback the number five track.

5.

Press the  CD 

u

  button.  (The tracking servo and the sledding

servo are turned OFF)

6.

Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%

7.

Press the  CD 

u

  button. (The tracking servo and sledding

servo are turned ON)
Confirm the C (DC voltage) is almost equal to the A (DC
voltage) is step 4.

8. To exit from this mode, turn the power off.

• Always move the optical pick-up to most inside track when

exiting from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can

be chipped.

Checking Location: CD board (Conductor side)

±