Aiwa CSD-EL300 EZ(S), Service Manual

ELECTRICAL ADJUSTMENT

13

2

4

3

5

24

L004

L006

TC001

L005

IC001

L007

C39

TU C.B

L003

(BAR-ANT)

3

7

M1

(DECK MOTOR)

8

MAIN C.B

+

L331

6

J201

78

24

23

< TUNER SECTION >

1. AM IF Adjustment

L007 ....................................................................... 450kHz

2. AM VT Adjustment

Settings:

• Test point: C39

+

• Adjustment location: L004

Method:

Set to AM 1000kHz adjust L004 so that the test
point becomes 3.7V±0.02V

3. AM Tracking Adjustment

L003 ....................................................................... 600kHz
TC001, L007 ........................................................ 1400kHz

4. FM VT Adjustment

Settings:

• Test point: C39

+

• Adjustment location: L006

Method:

Set to FM 108MHz adjust L006 so that the test
point becomes 6.0V±0.2V

5. FM Tracking Adjustment

L005 ........................................................................ 98MHz

< DECK SECTION >

6. Bias frequency Adjustment

L331 .............................................................. 75Hz±500Hz

7. Tape speed Adjustment

Settings:

• Test tape: TTA-100
• Test point: PHONES JACK (J201)
• Adjustment location: SFR of deck motor

Method:

Play back the test tape and adjust so that the
output frequency is 3000Hz ±30Hz.

8. Azimuth Adjustment

Settings:

• Test tape: TTA-320
• Test point: PHONES JACK (J201)
• Adjustment location: Azimuth adjustment

screw

Method:

Play back the test tape and adjust so that the
output is maximum.

PRACTICAL SERVICE FIGURE

< TUNER SECTION >

< FM SECTION >

IHF Sensitiviy:

Less than 18dB

(THD 3%)

(at 98MHz)

Signal to Noise Ratio:

Mono: More than 60dB

(Input 60dB)

Stereo: More than 53dB

Distortion:
(Input: 60dB)

Less than 2% (at 98MHz)

(Input: 120dB)

Less than 3% (at 98MHz)

Auto stop level:

28dB±8dB (at 98MHz)

Stereo separation:

More than 28dB (at 98MHz)

Intermediate frequency:

10.7MHz

< AM SECTION >

Sensitivity:

Less than 48dB

(S/N 10dB)

(at 600kHz)
Less than 46dB
(at 1000kHz)
Less than 44dB
(at 1400kHz)

Signal to Noise Ratio:

More than 30dB
(at 600, 1000, 1400kHz)

Distortion:
(Input: 74dB)

Less than 3% (at 1000kHz)

(Input: 115dB)

Less than 10%
(at 1000kHz)

Auto stop level:

Less than 60dB
(at 1000kHz)

Intermediate frequency:

450kHz

< DECK SECTION >

Tape speed:

3000Hz±60Hz

Wow & flutter:

Less than 0.35% (R.M.S)

Take-up torque:

30-60g-cm (FWD)

FF&REW torque:

75-160g-cm

Distortion:

Less than 5% (REC/PB, 1kHz)

S/N ratio:

More than 40dB (PB, AC, DC)
More than 40dB
(REC/PB, AC, DC)

Max Noise level:

Less than 35mV
(PB, VOL MAX)

Erasing Ratio:

More than 40dB

Test tape:

TTA-320
TTA-602 (NORMAL)
TTA-615 (HIGH POSITION)