Infinity ENTRA User manual

ENTRA
ENTRA POINT FIVE HTS
POWERED SUBWOOFER
SERVICE MANUAL
Infinity Systems, Inc.
250 Crossways Park Dr.
Woodbury,NewYork11797 Rev212/2002

TABLE OF CONTENTS
SPECIFICATIONS . . . . . . . . . .. . . . . . . . . . . . ... . . . . . . . . . .3
DETAILED SPECIFICATIONS . . . ... . . . . . . …….…… . . . . .4
CONTROLS and CONNECTIONS . . . .. . . . . . . . . .. . . . . . . .5
OPERATION . . . . . . . . . . . .. . . . . . . . . . . . . . . …... .. . . . . . .7
MECHANICAL/PACKAGING PARTS LIST . .. . . . . . . . . . . . .8
EXPLODED VIEW . . . .. . . . . . . . . . . . . . . . …………. . . . . . .9
PACKAGING . . . . . . . .. . . . . . . . . . . . . . . ……………. . . . . .10
TEST SETUP AND PROCEDURES . . . .. . . . . . . . . . . . . . . .11
ELECTRICAL PARTS LIST . . . . . . . .. . . . . . . . . . . . . . . . . . .12
INTEGRATED CIRCUIT DIAGRAMS . . . . . . . . ……... . ….. .17
BLOCK DIAGRAM . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .19
PCB DRAWINGS. . . .. . . . . . . . . . . . . . . …………….. . . . ….20
SCHEMATICS . . . . . . . . . . . . . . . . . . . ……... . . . . . . . . . . . .23

Entra Subwoofer
3
Specifications
Frequency Response: 34Hz- 150Hz (±3dB)
Maximum Amplifier Power 150 watts*, RMS, 500 watts peak,
(20Hz - 150Hz with no more than 0.1%
THD)
Crossover Frequencies: 50Hz - 150Hz, 24dB/octave,
continuously variable
Driver: 10” (245mm) C.M.M.D. shielded
DCR = 3.3 ohms ±10%
Dimensions (H x W x D): 15" x 14-1/2" x 17"
(381mm x 368mm x 432mm)
Weight: 47 lb (21.4kg) Each
Infinity continually strives to update and improve existing products, as well as create new ones. The
specifications and construction details in this and related Infinity publications are therefore subject to
change without notice.

Detailed Specifications
Entra Subwoofer
4

Entra Subwoofer
5
Controls and Connections

Entra Subwoofer
6
Controls and Connections (Cont.)

Entra Subwoofer
7
Operation

Entra Subwoofer
8
MECHANICAL PARTS LIST
1 SCREW, (16), #8 x .75, BLK, PB TRPH 336806-001
AMPLIFIER NOT FOR SALE
2 WOOFER, 10” (254mm)C.M.M.D.
SHIELDED DCR = 3.3 ohms ±10% 336649-001
3 GRILLE CUP (6) 333249-001
4 SCREW, (6), #6 x .75, BLK, PB PPH 903401-012
5 GRILLE 336454-001
6 FRONT BAFFLE 336452-001
7 FOOT (4) 330163-001
8 PORT TUBE 336806-001
PACKAGING
9 OWNERS MANUAL 336422-002
10 WARRANTY CARD 335841-001
11 SURVEY CARD 335868-002
12 PAD, TOP, END (2) 336457-001
13 CARTON 336458-001
Mechanical/Packaging Parts List

Entra Subwoofer
9
1
AMPLIFIER
(NOT FOR SALE)
PRE AMP
PCB ASSEMBLY
MAIN AMP
ASSEMBLY
POWER SUPPLY
PCB ASSEMBLY
2
1
3
4
5
6
1
7
8
INFINITY
ENTRA SUBWOOFER
CABINET
(NOT FOR SALE)
00470
TO SERVICE THE ENTRA SUBWOOFER
1) Remove the grille.
2) Extract (6) rubber grille retainers as shown in the illustration above; this can be accomplished by
carefully pulling them out of the cavities with long-nosed pliers or similar tool.
3) Remove the (6) Phllips screws that are now exposed.
4) Remove the front baffle.
5) Remove the (6) screws that secure the driver.
6) To service the amplifier, remove the (10) Phillips screws at the rear of the enclosure, and pull
the amplifier out of the back. Remove the two Phillips screws as indicated in VIEW A to remove the rear cover.
VIEW A
REMOVE
THESE
SCREWS
INFINITY SYSTEMS INC. NORTHRIDGE, CA, USA
DIRECT
DIRECT INPUT BYPASSES FILTER
WARNING:TOREDUCETHERISKOFFIREORELECTRICSHOCK,DO
NOTEXPOSETHISAPPLIA NCETORAINORMOISTURE.
ATTENTION:POURÉVITERTOUT RISQUEDE FEUOUCHOC
ÉLECTRIQUE ,NEPASEXPOSERCETAPPAREILÀLA PLUIEOUÀ
L'HUMIDITÉ.
AM PLIFI ER MA DE IN CHINA
R
SERIALNO.
SPEAKER LEVEL
INPUT
_
+
R
L
_
+
R
+
_
OUTPUT
L
_
+
LEVEL
LINE
INPUT
WARNING:SHOCKHAZARD-DONOTOPE N
NOUSERSERVICEABLEPARTSINSIDE
AVIS:RISQUEDECHOCÉLECTRIQUE-
NEPASOUV RIR
1 20V ~ 60 Hz 3A
OFF
POW ER
ON
FRE Q UENCY
CROSSOVER
MAXMIN 180°
0° 60
50
LEVEL PHASE
80
150
120
R
Exploded View

Entra Subwoofer
10
Packaging
9
10
11
12
12
13
00472