GN Resound Discover V Series User manual

GN ReSound as
Global Technical Operations
gto.gnresound.com
Lautrupbjerg 9 • DK-2750 Ballerup • Denmark
Phone: + 45 45 75 23 16 • E-mail: [email protected]
Technical Manual
Discover V BTE

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Technical Manual for Discover V BTE
Subject Page
Description ..................................................................................................... 3
Typical performance data IEC 60118-7/ANSI (2cc coupler)........................ 4-6
Part lists ...................................................................................................... 7-8
Diagram.......................................................................................................... 9
Microphone complete................................................................................... 10
Receiver complete ........................................................................................11
Amplifier .................................................................................................. 12-14
Instrument complete in housing ................................................................... 15
Instrument complete & programming cable ................................................. 16
Table of contents

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Technical Manual for Discover V BTE
Description
The Discover V BTE is a fully digital Behind-The-Ear (BTE) hearing instrument developed to set a new standard for
affordable and fundamental hearing care. The instrument offers a two band signal processing with Advopro Digital, which
suppresses dirsturbances caused by the user’s own voice and at the same time maintains amplification of the
frequencies important for understanding speech. The clear sound, reliable design, easy battery change, long battery
lifetime and low battery warning indicator is all standard.
Discover V is available in beige, brown and grey colors.
No battery is required during programming - power is supplied via prog. cable CS45.
Battery type 13. Estimated average battery life 217 hours.
Key features :
4-band Wide Dynamic Range Compression (WDRC).
4-band shaping handles.
Feedback Management via Notch filter.
Long battery lifetime.
User-friendly design.
Audiogram + fitting rule.
Digital Noise Clarifier.
Clear, more comfortable sound.
For moderate to severe hearing loss.
Standard configuration :
Volume control.
Telecoil.
Acoustic indicator for programme selection.
Low battery warning indicator.
Fitting requirements :
HI-PRO™ or NOAHLink™ interface.
NOAH software™ (2.x or 3.x).
Aventa™ fitting software (1.5 or higher).
CS45 socket programming cables.

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Technical Manual for Discover V BTE
Typical performance data - IEC 118-7
No battery is required during programming - power is supplied via prog. cable CS45
Data in accordance with IEC 118-7. All sound pressure levels (dB SPL) refer to 20 μPa.
Unless otherwise is stated, data are based on a battery voltage of 1.35 V and impedance of 5 Ohm.
Tolerance Unit
Reference test gain (60 dB SPL input) at 1600 Hz 37 +/- 5 dB
Full-on gain (50 dB SPL input) Max. 57 +/- 5 dB
at 1600 Hz 47 +/- 5 dB
Maximum output (90 dB SPL input) Max. 126 +/- 4 dB SPL
at 1600 Hz 120 +/- 4 dB SPL
Total harmonic distortion at 800 Hz 0.5 +3 %
at 1600 Hz 0.3 +3 %
Telecoil sensitivity (1 mA/m input) Max. 88 +/- 6 dB SPL
Telecoil sensitivity (10 mA/m input) Max. 108 +/- 6 dB SPL
Equivalent input Noise w/o Noise reduction 25 +3 dB SPL
Frequency range (DIN 45605) 160-6000 Hz
Current drain 1.2 +20% mA
Typical Battery Life Time Battery type 13 217 hrs

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Typical performance data - ANSI
No battery is required during programming - power is supplied via prog. cable CS45
Data in accordance with ANSI S3.22-1996. All sound pressure levels (dB SPL) refer to 20 μPa.
Unless otherwise is stated, data are based on a battery voltage of 1.35 V and impedance of 5 Ohm.
Tolerance Unit
Reference test gain (60 dB SPL input) HFA 40 +/- 5 dB
Full-on gain (50 dB SPL input) Max. 57 +/- 5 dB
HFA 50 +/- 5 dB
Maximum output (90 dB SPL input) Max. 126 +/- 4 dB SPL
HFA 122 +/- 4 dB SPL
Total harmonic distortion at 800 Hz 0.5 +3 %
at 1600 Hz 0.3 +3 %
Telecoil sensitivity (10 mA/m input) Max. 108 +/- 6 dB SPL
Telecoil sensitivity (10 mA/m input) HFA 100 +/- 6 dB SPL
Equivalent input Noise w/o Noise reduction 22 +3 dB SPL
Frequency range 170-6000 Hz
Current drain 1.5 +20% mA
Typical Battery Life Time Battery type 13 217 hrs
Reference test gain settings
Gain 34 34
Reference test gain settings
Gain 41 41

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Typical performance data- IEC 118-7
130
120
110
100
90
80
70
60
50
40
30
20
10
0
100 1000 10000 100 1000 10000
No battery is required during programming - power is supplied via prog. cable CS45
2cc
Coupler
Frequency:
Maximum Output Full-on and Reference Test Gain
Frequency:
Full on Gain 50
dB SPL input
Reference Test
Gain 60 dB SPL
2cc
Coupler

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Technical Manual for Discover V BTE
Part list
Item Part No.
Receiver, type EF-7505 15301800
Rec. tube/nipple (50 pcs.) 31932254
Rec. suspension 70911569
Rec. shield, metal 70921910
Rec. Wire ESW 7x32μ, green 20 mm 15129820
Rec. Wire ESW 7x32μ, amber 20 mm 15129720
Rec. complete (with tube, wires) 15248900
Microphone, type EM3446CX 75927771
Mic. suspension (50 pcs.) 31932216
Mic. Wire ESW 7x32μ, green 10 mm 15129810
Mic. Wire ESW 7x32μ, amber 10 mm 15129710
Mic. Wire ESW 7x32μ, red 10 mm 15129610
Mic. complete (with susp. wires) 15248800
Hook complete with filter (50 pcs.) 31929998
Screw for housing (100 pcs.) 31929996
Amplifier 15249000
Volume control 70924614
Nut for VC 70911081
Telecoil 15284900
Switch 70927017
Item Part No.
Nut for switch 70911081
Support for switch 70921822
Switch board 15340300
Switch compl. mounted on switch board 15287500
Support compl. w/progr. socket CS45 70929930
Battery spring +/- (100 pcs.) 31932190
Cu-wire GN 12/12 green, solid 12 mm) 70927136
Partition 70930869
Bolt/screw for springs/patition 75921693
Glue CH-8 75925421
Glue CH-7 75925336
Vaseline, 100 ml. 15255601
Loctite 406 1901-339
Coating, EGC-1700, 100 ml 15290401
Silicone coat 1908-209
Programming cable red, CS45, 5 pol 50927672
Programming cable blue, CS45, 5 pol 50927673

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Part list
HI Dummies Discover V
HI Complete Discover V
Housing part list : Part No.
Beige color:
Housing upper/lower part with s/n # 15249400
Battery door 15250200
progr. socket cover 70921851
Microphone ring 70921808
Brown color:
Housing upper/lower part with s/n # 15249401
Battery door 15250201
progr. socket cover 70921852
Microphone ring 70921809
Grey color:
Housing upper/lower part with s/n # 15249402
Battery door 15250202
progr. socket cover 70921853
Microphone ring 70921810
Item Part No.
Beige 15209600
Brown 15209601
Grey 15209602
Item Part No.
Beige 15248300
Brown 15248301
Grey 15248302

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Technical Manual for Discover V BTE
Diagram

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Technical Manual for Discover V BTE
Microphone complete
Solder the wires as shown. The wires
should slope 45o. Brush coating CH-8
- p/n 75925421 - onto the solder points
Mic. without wires and suspension:
p/n 75927771
Red ESW wire, 10 mm. p/n 15129610
Amber ESW wire, 10 mm. p/n 15129710
Green ESW wire, 10 mm. p/n 15129810
Mount the mic. into the mic. suspension, p/n 31932216
(50 pcs.)
Mic. complete mounted with wires
and suspension, p/n 15248800
Notice: Before mounting mic. complete into the sound inlet
groove in the housing, add Vaseline p/n 15255601 to the groove

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Technical Manual for Discover V BTE
Receiver complete
Mount the rec tube, p/n 31932254/50
pcs.) in an angle of 23oas shown. Add
a drop of Loctite 406 (p/n 1901-339)
each side to fix it. Glue with CH-71 (p/n
75925336) around tube to make it tight to
the sound outlet of the rec
Add Loctite 406 on both inner sides of the metal shield before mount-
ing it on the rec. Make sure the lower side of the shield is mounted to
the edge of the rec (indicated by a red dotted line). Mount the suspen-
sion (p/n 70911569) as shown and glue a bit with CH-8
(p/n 75925421) to keep the suspension in place onto the shield/rec
Gently bend the wires and fix them to the rec case
by using CH-8. Rec complete mounted with wires,
suspension, tube and shield p/n 15248900
Before mounting the tube into the stud/sound
outlet, add Vaseline p/n 15255601 round the
tube on the area which is not to be cut off
12
34
Solder the green and amber wires as shown
and apply CH-8 onto the soldering points.
Rec without wires, suspension, shield and
tube: p/n 15301800.
Amber ESW wire, 20 mm. p/n 15129720.
Green ESW wire, 20 mm. p/n 15129820.

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Technical Manual for Discover V BTE
The prog. socket is glued with
Loctite 406 p/n 1901-339 to fix
it into the inlay/support 2000
DIG-17 p/n 70929931
Amplifier
Telecoil is glued to the PCB
with CH-8 p/n 75925421
and connected on the other
side of the PCB
Green mic.
Red mic.
Rec wires
Program socket
wires (The Red wire
is cut off)
Amber mic.
The amp is delivered without battery contacts
and transducer wires as shown
Amp p/n 15249000
Telecoil
wires
Note: All soldering points must always be covered
with coating EGC-1700 p/n 15290401.
Nut for VC

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Technical Manual for Discover V BTE
Amplifier
When replacing the switch p/n
70927017, cut the two terminals
as shown
Mount the sw supp on the sw board.
Mount the switch and bend the terminals
onto the soldering points
Solder the terminals and apply
CH-6 p/n 75925308 in the 2 holes
Apply Coat p/n 1908-209 as indicated in pictures 4-5. The switch complete mounted (as shown in pic. 3) is also available as p/n
15287500.
How to replace: Disconnect the sw board wing and the points which con-
nect the sw board to the main board. Lift up the defective part and place the
new one into the housing. Connect the new sw board to the main board and
the sw board wing to the bat spring (+)
2
Sw board
Sw supp
3
CH-6
Points which con-
nect the sw board
to the main board
Sw board “wing”
to bat (+)
5
4
1

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Prepare Amplifier for mounting into Housing
Solder the 3 mic. wires to the PCB.
Gently adjust the wires and make
sure the wires are placed correct
round the screw hole in housing
(see also next page). Add CH-8 on
the solder points
Solder the 2 rec wires to the PCB. Gently adjust the wires and add CH-8
on the solder points, in the notch and on rec case to fix the wires
Fill the area between the nylon insert and the switch-PCB with grease p/n
6879-199. Do not cover the bolts and the areas which will be visible from
outside (indicated with blue color)
Solder the green wire from battery
spring (-) to the PCB. Solder the
switch board “wing” to the battery
spring (+) and apply CH-8 on both
points
Insert bolts p/n 75921693 (see
next picture).Fix the battery springs
into the partition and solder the
green solid wire (p/n 70927136) to
battery spring (-) (yellow arrow).
Apply CH-8 p/n 75925421 on the
solder point
Place partition complete into lower
housing.Add coat p/n 1908-209 on
the lower area of the partition as
indicated with blue color
Bolt
Bolt
sw board “wing” to
bat (+)
green wire from bat (-)
CH-8
notch
Green
solid wire
to (-)

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Instrument complete in housing
Mic. ring (p/n 70921808/BG,
70921809/BR, 70921810/GR)
is mounted without using glue
Screws for HSG
p/n 31929996 (100 pcs.)
Cover for prog. socket
p/n 7092185x

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HI compl
Instrument complete & programming cable
Programming cable CS45 (5 pol)
P/n 10020501, red (R)
P/n 10020502, blue (L)
HI complete
Instrument complete & programming cable
Programming cable CS45 (5 pol)
P/n 10020501, red (R)
P/n 10020502, blue (L)