14 June 2023

Initial release

Flat screw driver

Philips screwdriver

Comb MK II Lite or Comb MK II NS Upgrade kit

Nano SIM card

Step

Description

Diagram

Before commencing the upgrade make note of the current wiring: mains and relay connections.

Switch Off the mains supply to the intercom at the DB board or plug

If the current installation uses a transformer, it must be replaced with the 15V power supply

Remove the MK II BB PCB

On older back boxes only one set of mounting pillars available

Use the bottom two mounting pillars

Use supplied stand offs

Power connectors located in similar positions.

Relay connectors located in same

position.

New Battery

routing of speaker and microphone and GSM antenna

OBR is now mounted of the PCB to improve range

Remove SIM tray and place existing SIM card (cut to fit) or new Nano SIM card

1

Placement of MKII-BB pillars.

2

Placement of MKII-PL pillars.

3

Note:

Confirm SIM tray is fitted.

4

Remove buzzer protection sticker.

5

Place the MK II PL onto the correct pillars and secure using 4 x screws.

6

1. Connect antenna.

2. Carefully push the OBR antenna wire through the OBR antenna hole.

7

Connect Power to +PWR-.

8

Line up the fingers on the front plate the the holes in the back box and insert.

9

Connect cable-earth.

10

Attach the ribbon cable from the front panel.

11

1. Attach the 2 way speaker cable.

2. Attach the 4 way microphone cable.

12

Connect the battery.

13

Place the ICASA label onto the bottom of the black box. 

14

Place the ICASA label onto the white cardboard box next to the serial number label.