Aiwa XR-M35 User Manual download pdf (Page 35)

PRACTICAL SERVICE FIGURE

< TUNER SECTION >

< TUNER SECTION > < DECK SECTION >

Clock Frequency Check

Settings:

● Test point: TP3 (CLK IC770 pin30)

Method: Set to AM 1710kHz and check that the test

point becomes 2160kHz*45kHz,

AM VT Check

Settings:

● Test point: TP4 (VT)

Method:

Set to AM 1710kHz and check that the test

pointis less than 7,0V,

Then set to AM 530kHz and check that the test

point is more than 0.3V.

AM IF Adjustment

Settings:

“ Test point: TP8, TP9

L772 ..............................................450kHz

AM Tracking Adjustment

Settings:

“ Test point: TP8, TP9

“ Adjustment location: L981

Method: Set to AM 1000kHz and adjust L981 so that

the test point becomes maximum,

FM VT Check

Settings:

● Test point: TP4 (VT)

Method: Set to FM 87.5MHz, 108,OMHZand check that

the test point is more than 0.5V (87.5MHz) and

less than 8.5V (108.OMHZ).

DC Balance/Mono Distortion Adjustment

Settings:

● Test point: TP5, TP6

“ Adjustment location:L771

“ Input level: 54dB

Method: Set to FM 98.OMHZand adjust L771 so that

the voltage between TP3 and TP4 becomes

OVM.04V.

Next, check that the distortion is less than

1.3%.

< DECK SECTION >

7. Tape Speed Adjustment

Settings:

● Test tape: ‘lTA-100

● Test point: TP301

● Adjustment location: SFR1

Method: Playback the test tape by DECK2 and adjust

SFR1 so that the frequency counter reads

3000Hti5Hz. Check that the counter reading

in the REV mode is within the range of *45Hz

of that in the FWD mode.

8. Azimuth Adjustment

Settings:

● Test tape: TTA-300

c Test point: TP301

● Adjustment location: Head azimuth

adjustment screw

Method: Playback the 10kHz signal of the test tape and

adjust the adjustment screw so that the output

becomes the -5dB point below the maximum

reading. The adjustment must ends with the

clockwise rotation of the adjustment screw.

Perform this adjustment in both FWD and

REV directions. Fix the adjustment screw with

adhesive agent upon completion of adjustment.

9. PB Sensitivity Adjustment

Settings:

● Test tape: TTA-200

● Test point: TP301

● Adjustment location:

SFR303 (Lch)

SFR304 (Rch)

Method: Play back the test tape and adjust SFRS so that

the output level of the TP301 becomes 245mV.

10. REC/PB Frequency Response Adjustment

Settings:

● Test tape: TTA-602

c Test point: TP301

● Input signal: lkHz/10kHz (LINE IN)

● Adjustment location: SFR351 (Lch)

SFR352 (Rch)

Method:

Establish the record mode. Input the lkHz and

the 10kHz signals from LINE IN with the input

level so that TP301 has the signal level of

12mV. Record the lkHz and the 10kHz

signals, then play them back. Adjust SFR so

that the output difference between the lkHz

and the 10kHz signals becomes OdB+-O.5dB.

11. REC/PB Sensitivity Adjustment

Settings:

● Test tape: TTA-602

● Test point: TP301

● Input signal: lkHz /lOkHz (LINE IN)

● Adjustment location: SFR305 (Lch)

SFR306 (Rch)

Method: Establish the record mode. Input the lkHz

signal from LINE IN with the input level so

that TP301 has the signal level of 12mV.

Record the lkHz signal, then play it back.

Adjust SFR so that the output level becomes

12mVk0.5dB.

IHF Sensitivity:

(THD 3%)

Signal to noise ratio:

Distortion:

(Input: 54dB)

Stereo separation:

Intermediate frequency:

4dB~6dB

(at 87.5/98.OMHz)

5dBt6dB (at 108MHz)

More than 65dB

(at 98.OMHZ)

Less than 1.3%

(at 98.OMHZ)

More than 25dB

(at 98.OMHZ)

10.7MHZ

Sensitivity:

54dB*6dB (at 600kHz)

(S/N 20dB)

52dB*6dB

(at 1000/1400kHz)

Signal to noise ratio:

41dB*36dB (at 1000kHz)

(Input: 100dB)

Distortion:

Less than 1.5%

(at 1000kHz)

Intermediate frequency:

450kHz

Tape speed:

Wow & flutter:

(W.R.M.S)

Take-up torque:

F.F torque:

REW torque:

Back tension:

PB Output level:

REC/PB Output level:

Distortion (REC/PB):

Noise level (PB):

Noise level (REC/PB):

Erasing ratio:

REC bias frequency:

Test tape:

3000Hz+2.0%

Less than 0.21%

30-55g-cm (FWD, REV)

75-160g-cm

3+4g-cm (FWD, REV)

450mV*2dB (LINE OUT)

300mV&2dB(LINE OUT)

Less than 2%

(NORM, CrOz)

Less than 3mV

(DOLBY NR OFF, NORM)

Less than 2mV

(DOLBY NR ON, CrOz)

Less than 3.2mV

(DOLBY NR OFF, NORM)

Less than 2.2mV

(DOLBY NR ON, CrOz)

More than 60dB (125Hz)

85kHz

NORMAL TTA-1OO

TTA-300

TTA-601

TTA-602

cro2

TTA-200

12. Bias OSC Frequency Adjustment

Settings:

● Test tape: TI’A-601

● Test point:TP1O(R311)

● Adjustment location:L351

Method:

Set to the REC mode. AdjustL351 so that the

frequency at TP1Ois 85.OkHfilkHz.

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Aiwa XR-M35 User Manual Page 35

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