Roadstar HRA-1000 Manuel utilisateur

Service Manual - HRA-1000

HRA-1000

Service Manual - HRA-1000

INDEX

1.WARNING AND TECHNICAL SPECIFICATION 0

2.ALIGNMENT 4

3.BLOCK DIAGRAM 5-6

4.FUNCTION DIAGRAM 7

5.SPECIFICATION 8

6.VOLTAGE CHARTS 9-10

7.TROUBLESHOOTING GUIDE 11

8.DISASSEMBLY INSTRUCTION 12

9.EXPLOSION DIAGRAM AND BOM 13

10.WIRING DIAGRAM 14

11.PRINCIPLE DIAGRAM 15

12.REPAIR DIAGRAM 16

13.MATERIAL BILL OF APPLIANCE 17

TITLE: INDEX

WARNING:

FOR CONTINUED SAFETY THE FOLLOWING PRECAUTIONS SHOULD BE FOLLOWED

DURING SERVICING.

1.MAKE SURE POWER CORD IS DISCONNECTED BEFORE REPLACING ANY PARTS.

2.REPLACE THE PRODUCT'S TYPE AND CRITICAL PARTS AS SHOWN IN THIS DIAGRAM.

3.THE FOLLOWING TEST MUST BE IMPLEMENTED AFTER EACH REPAIR BEFORE

RETURNING IT TO CUSTOMER. USE AN OHM-METER TO MEASURE THE F.C.

RESISTANCE FROM BOTH A.C. CONDUCTORS TO ANY EXPOSED METALLIC PART

SUCH AS A SCREW HEAD. METAL INLAYS ETC. THE RESISTANCE SHOULD

BE MEASURED 10 MEGAOHMS MINIMUM.

TECHNICAL SPECIFICATION

Power output :3 Watts RMS per channel NOTE:

into 8 ohms In keeping with our policy of continually

Frequency response :60 Hz-12 KHz improving our service and technical

quality of our products we reserve the right

to change component type, quality and

TUNER SECTION technical specification at any time.

FM Section :88 MHz-108 MHz

AM Section :540 KHz-1600 KHZ

TITLE: WARNING AND

TECHNICAL SPECIFICATION

MODEL:HRA-1000

INSTRUMENTS REQUIRED: AM&FM Signal generator

AC CTVM Oscilloscope

AM IF ALIGNMENT

Set output of signal generator no higher than necessary to obtain an output reading.

Slide the function switch to the tuner position and set the band button to select AM.

Set volume control to reference output.

RADIO SETTING ADJUSTMENT REMARKS

GENERATOR

465KHz Tune to 600KHz Scope across T102 Adjust the "U"

400Hz (high end). speaker jack Wave for best &

Modulation maximum output

AM RF ALIGNMENT

SIGNAL RADIO SETTING ADJUSTMENT REMARKS

GENERATOR

540KHz Tune to 540KHz

400Hz (low end). T101

Modulation

1600KHz Tune to 1600KHz

400Hz (high end). PVC-TC1

Modulation

600KHz 600KHz VTVM&SCOPE AM ANT Coil For maximum and

Across Speaker Good output

1400KHz 1400KHz PVC-TC2 For maximum and

Good output

Repeat 4 steps to get the ideal value of FM frequency range &sensitivity

FM RF ALIGNMENT

Connect Signal Generator across antenna terminals.

Press the function button to select the tuner position and the band to FM position.

Adjust Volume control to reference output.

SIGNAL RADIO SETTING

GENERATOR ADJUSTMENT REMARKS

88MHz Tune to 88MHz L103

1000Hz (low end )

modulation

108MHz Tune to 108MHz PVC-TC3

1000Hz (high end ).

90MHz 90MHz VTVM&SCOPE L104 for good & maximum.

Across SPEAKER output

106MHz 106MHz Jack PVC-TC4 for good & maximum.

output

Repeat 4 steps to get the ideal value of FM frequency range &sensitivity

ALIGNMENT PROCEDURES

SIGNAL CONNECTION

TITLE: ALIGNMENT

CONNECTION

TITLE: BLOCK DIAGRAM

TITLE: FUNCTION DIAGRAM

SPECIFICATION

Power source : 230V/50Hz

Load impedance : 8 ohm

Reference output : 50 Mw

AM modulation frequency : 400Hz

MOD

FM modulation frequency : 1KHz

DEV :

BAND:AM

ITEM DESCRIPTION UNIT NOMINAL LIMIT

1 TUNING RANGE KHz 540-1600

2 SENS FOR 20dB S/N 600KHz dB 60 64

1000KHz 60 64

1400KHz 60 64

3 S/N RATIO AT 5MV INPUT 1000KHz dB 35 30

4 IF REJECTION AT600KHz dB 40 35

5 IMAGE REJECTION AT 1400KHz dB 2 35

6 T.H.D. AT5Mv 1000KHz % 60-3K 4

7 WHISTLE IF MODULATION AT5Mv % 510

8 AUDIO FIDELITY -6dB Hz 80-3k 120-2.5k

9 OUTPUT POWER 10% T.H.D(MOD 60%) W 3

10 IF KHz 465 +/-5

BAND:FM

ITEM DESCRIPTION UNIT NOMINAL LIMIT

1 TUNING RANGE KHz 88-108

2 SENS FOR 30dB S/N 90MHz dB 18 26

98MHz 18 26

106MHz 18 26

3 S/N AT INPUT dB 35 30

4 IF REJECTION 90MHz dB 60 50

5 IMAGE REJECTION 106MHz dB 30 20

6 T.H.D 98MHz % 11.5

9 POWER OUTPUT (DEV 45KHz)20% T.H.D W 3

10 IF MHz +/-0.1

TITLE: SPECIFICATION

30%

22.5KH

10.7

Q403 2SC945 0.7 0 0

Q401 2SC945P 3.8 11.4 3.1

Q402 2SB722 12 12.7 12.7

BCE

TITLE: VOLTAGE CHARTS

1.5

2.6

1.1

1.2

1.4

17 1.3

CXA 1691

IC U401

UTC2025

6.22

12.6

10 09

8 11.6

0.5 1.4

0 1.3

5 1.3

U101

1.5

2.1

0.5

12.7 0

0.5

6.2 1.3

1.3

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