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JVC KS-FX725R service manual Adjustment method, Test instruments reqired for adjustment

Models: KS-FX725R

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KS-FX725R

Adjustment method

Test instruments reqired for adjustment

1.Digital osclloscope(100MHz)

2.Frequency Counter meter

3.Electric voltmeter

4.Wow & flutter meter

5.Test tapes

MC-109C

................... for TAPA CURL confirmation

 

(without Padd type)

VT724

for DOLBY level measurement

VT739

For playback frequency measurement

VT712 ....

For wow flutter & tape speed measurement

VT703

For head azimuth measurement

6. Torque gauge

.................... Cassette type for CTG-N

 

 

(mechanism adjustment)

Standard volume position

Balance and Bass,Trable volume, Fader :Center(Indication"0")

Loudness,Dolby NR,Sound,Cruise:Off

Volume position is about 2V at speaker output with following conditions.Playback the test tape VT721.

FM1/FM2: 87.5MHz to 108.0MHz

FM3

: 65MHz to 74 MHz

AM

: (MW)522kHz to1620kHz

 

(LW) 144kHz to 279kHz

Measuring conditions(Amplifier section)

Power supply voltage .............. DC14.4V (11V to 16V allowance)

Line-Out Level/Impedance........... ....... 2.0V/20k load(250 nWb/m)

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JVC KS-FX725R service manual Adjustment method, Test instruments reqired for adjustment, Standard volume position
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