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A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
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Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
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some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
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Well.. I'd searched for this manual and although I found many copies online I was pleased to find your website with a well balanced pricing system and easy to search and follow links. That together with the very quick response time was just what I was looking for.. being a very impatient tech.. ;-) I had the service manual in front of me within a short time.
Bookmarked.. and you can bet I will always come here first for my service & user manuals..
best regards
Ed(Tony) Foley
G7WHK
Reference 1020w 10" Woofer � Technical Data
CAR AUDIO
VENTED BOX VOLUME (INCLUDES DRIVER/PORT DISPLACEMENTS)
SEALED BANDPASS BOX VOLUME (INCLUDES DRIVER/PORT DISPLACEMENTS)
length = 9.01"
Port
fo = 28.0 Hz
Port
fo = 50.0 Hz
length = 7.87"
Reference 1020w
(side view)
Reference 1020w
(side view)
diam. = 4"
VBOX = 1.75 ft3 (49.56 liters)
(all sides lined with 1-inch fiberglass or fiberfill)
diameter = 3"
V
REAR (stuffed with loosely-packed fiberfill)
= 1.00 ft3 (28.32 liters)
V
FRONT
= 1.00 ft3 (28.32 liters)
VENTED FREQUENCY RESPONSE @ 2.83 V
105 100 dB In-Car 12 dB LP @ 80 Hz 95
SEALED BANDPASS FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 80 Hz Out-Of-Car
95 Out-Of-Car 90
90
85
85
80
80
75
75
70
70
65
65 20 Frequency 50 100 Hz 200 500 1k
C
60 20 Frequency 50 100 Hz 200 500 1k
C
2k
2k
VENTED EXCURSION/GROUP DELAY @ 250 W
40 Xd mM T mSec 40 20.0 35 30 17.5
SEALED BANDPASS EXCURSION/GROUP DELAY @ 225 W
Xd mM T mSec 20 15
30
20
15.0
10
25 Group Delay 20
10
12.5 Group Delay
5
0
10.0
0
15
-10
7.5
-5
10
-20
5.0
-10
5
Transducer Excursion
-30
2.5 Transducer Excursion
-15
0 20 Frequency 50 100 Hz 200 500 1k
C
-40
0.0 20 Frequency 50 100 Hz 200 500 1k
C
-20
2k
2k
Harman Consumer Group � 250 Crossways Park Drive � Woodbury, NY 11797 � VOICE: 516-496-3400 � FAX: 516-496-4868 � www.infinitysystems.com
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