Nokia NPE-4 - Hookswitch Problems; Sometimes Not Possible to Release Incoming Call; No Voice Dial Possible

CONFIDENTIAL 18 (25)
NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
SCCE Training Group Date 15.08.2002
© NMP 2002
Checked by:
SCCE Training Group
Approved by:
SCCE
Hookswitch problems
Sometimes not possible to release “incoming call”
No voice dial possible
When the headset HDC-9P is connected to the botton connector of NPE-4 and a call is coming in, often it is not possible to
release the call by pressing the hookswitch.
Often it is also not possible to initiate the voice call by pressing the hookswitch.
If one of the above mentioned problems occures, the changing of R175 can solve the problem.
Open the BB-shield and measure the resistor R175=100kΩ
ΩΩ
Ω.
If R175=100kΩ
ΩΩ
Ω, change the resistor to 15kΩ
ΩΩ
Ω.
(See pictue below).
Note! Up to HW-ID 06.01 there is a 100kΩ
ΩΩ
Ω resistor. From HW-ID 06.02 the value has changed to 15kΩ
ΩΩ
Ω.
For more information also see SB 024
100kohm
15kohm