Roadstar HRA-1000 User manual

Service Manual - HRA-1000
R
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
2

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
3

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
CONNECTION
4

TITLE: BLOCK DIAGRAM
5

TITLE: BLOCK DIAGRAM
6

TITLE: FUNCTION DIAGRAM
7

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
z
10.7
8

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
9

47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
TITLE: VOLTAGE CHARTS
0
1.5
3
2.6
0
1.1
1.2
1.4
0
0
30
31
32
0
26
27
28
29
22
23
24
25
18
19
20
21
17 1.3
0
00
CXA 1691
00
30
IC U401
UTC2025
6.22
1
PIN
15
14
16
12.6
13
12
11
0
10 09
8 11.6
0
0.5 1.4
0 1.3
6
5 1.3
7
40 00
U101
1.5
2.1
0.5
12.7 0
0
0.5
6.2 1.3
1.3
1.3
1.3
48
49
50
10