Sennheiser HMEC 26 - Page 67

SENNHEISER ELECTRONIC GMBH & CO. KG
COMPONENT MAINTENANCE MANUAL
HMEC 26-SERIES
Page 7005
May 25/11
23-41-48
C. Assembly of the acoustic units and caps
NOTE:
REPLACEMENT OF DEFECTIVE ACOUSTIC UNITS FOR HEADSETS UP TO SERIAL NUMBER 00200100:
THE ACOUSTIC UNITS HAS BEEN REDESIGNED. FOR ACOUSTICAL REASONS ALWAYS REPLACE
- THE LEFT AND THE RIGHT ACOUSTIC UNIT AND
- THE LEFT AND THE RIGHT EARPAD (REF. IPL).
REPLACEMENT OF DEFECTIVE ACOUSTIC UNITS FOR HEADSETS FROM SERIAL NUMBER 00200100:
REPLACE THE DEFECTIVE ACOUSTIC UNIT ONLY. FOR HYGIENICAL REASONS THE EARPAD
REPLACEMENT IS RECOMMENDED.
NOTE:
REPLACEMENT OF THE CAP WITH MICROPHONE ARM SUPPORT
THE MICROPHONE ARM AND THE CAP WITH MICROPHONE ARM SUPPORT HAS BEEN
REDESIGNED: REPLACE THE CORRECT MICROPHONE ARM AND THE CORRECT CAP WITH MICRO-
PHONE ARM SUPPORT (REFER TO FIG. 7001, FIG. 7002).
NOTE:
FOR HMEC 26, REFER TO IPL FIG. 1 AND FOR HMEC 26-T, REFER TO IPL FIG. 3.
FOR THE TWO HEADSETS, REFER TO FIG. 2001.
(1) Attach the acoustic units (050, 060) to the headband (010).
(2) Solder the leads of the split headband cable (010) to the PCB on left and right side.
Solder the microphone cable to the PCB at microphone side (Fig. 2001).
(3) Press the caps (040, 070) to the acoustic units (050, 060).
(4) Install the screws (090) with a torque of 20 Ncm ±3 Ncm.
D. Installation of the earpads
NOTE:
FOR HMEC 26, REFER TO IPL FIG. 1 AND FOR HMEC 26-T, REFER TO IPL FIG. 3.
(1) For acoustical reasons always replace the left and the right acoustic unit
and the left and the right earpad. Put the earpads (100) to the acoustic units (050, 060).
(2) Apply pressure around the earpads (100) until you hear that all 12 latches lock in the correct
position.
NOTE:
TO GET THE FULL ACOUSTIC FUNCTION, YOU MUST MAKE SURE THAT ALL 12 LATCHES ARE COR-
RECTLY LOCKED AND HOLD THE HARD PLATE OF THE EARPAD.
latches
latches
hard plate
Figure 7002
Installation of the earpads
Oct 30/08