After Sales Technical Documentation
Mobile Base MCH–8
Original 50/96
NMP Part No. 0275275
After Sales
Mobile Base MCH–8
CONTENTS
Mobile Base MCH–8 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Summary – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Specification – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Modes of Operation – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Signals and Connections – 4. . . . . . . . . . . . . . . . . . . .
Junction Box Connector X101 – 4. . . . . . . . . . . . . . . . . . . . .
Handportable Connector X100 – 4. . . . . . . . . . . . . . . . . . . . .
Functional Description – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Diagram of DH1 (Version 6.0 Edit:19 layout 07) – 6. . . .
Parts List of DH1 (Version 1.3) Code: 0200182 – 7. . . . . . . . . .
Exploded View – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly Parts – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Documentation
Page – 2
Original 50/96
After Sales
Technical Documentation
Mobile Base MCH–8
Introduction
MCH–8 is the holder unit of the handportable in a mobile environment.
The main function of the MBH–8 is to secure the phone firmly in the car
and provide a basis for the connection of signals between the phone and
the accessories. It connects handportable to junction box, booster and
mobile antenna.
Mobile Base MCH–8
Technical Summary
HF operations are possible when transceiver is installed into the mobile
base with the HFJ–3 junction box. The battery of te transceiver can be
charged via the mobile base.
MCH–8
Original 50/96
Page – 3
After Sales
Mobile Base MCH–8
Technical Specification
Modes of Operation
When handportable is in the MCH–8 holder unit audio signals turn to
junction box and rf signal to booster or mobile antenna. Also battery of
handportable is charged by junction box through MCH–8.
External Signals and Connections
Mobile base module DH1 has two external connectors, the handportable
connector X101 and the junction box connector X102. It also contains one
RF connector to connect RF signal/signals to car antenna.
Junction Box Connector X101
Pin: Name: Function:
Technical Documentation
1 BIND
2 GND Ground for charger
3 M2BUS Serial mbus data between handportable,
4 VC Supply voltage/charging current for
5 SHIELD Cable shield, connected to GND
6 AGND Signal ground
7 XMIC/JCONN Audio signal from junction box to hand
8 XEAR/HFPWR Audio signal from handportable to junction box,
Handportable Connector X100
Pin: Name: Function:
accessories and junction box
handportable 12 V ±1 V or 800 mA ±70 mA
portable, d.c. level indicates connection of
junction box to handportable
current sink from this pin to handportable turns
on +5 V supply voltage in junction box
Page – 4
1 GND Logic ground, ground for charger
2 XMIC Audio signal from junction box to handportable,
d.c. level indicates connection of junction box
to handportable
3 AGND Signal ground
4 TDA NC
Original 50/96
After Sales
Technical Documentation
5 M2BUS Serial mbus data between handportable,
6 HOOK NC
7 PHFS NC
8, 16 VC Supply voltage/charging current for
9 GND Ground
10 XEAR Audio signal from handportable to junction box,
11 DSYNC NC
12 RDA NC
13 BIND
14 VF NC
Mobile Base MCH–8
accessories and junction box
handportable 12 V ±1 V or 800 mA ±70 mA
current sink from this pin to handportable turns
on +5 V supply voltage in junction box
15 DCLK NC
Functional Description
The DH1 module contains filtering for signals between handportable and
junction box/booster. Handportable is connected to DH1 by connector
X100 and junction box and booster by connector X101. RF signal from
handportable to mobile antenna or booster is connected by the special
RF cable.
Original 50/96
Page – 5
After Sales
Mobile Base MCH–8
Technical Documentation
Circuit Diagram of DH1 (Version 6.0 Edit:19 ) (for layout version 07)
Page – 6
Original 50/96
After Sales
Technical Documentation
Mobile Base MCH–8
Parts List of DH1 (Version 1.3) Code: 0200182
ITEM CODE DESCRIPTION VALUE TYPE
R102 1413924 Chip resistor 220 5 % 0.1 W 0805
R103 1413917 Chip resistor 150 5 % 0.1 W 0805
R107 1413924 Chip resistor 220 5 % 0.1 W 0805
R108 1411645 Chip resistor 560 5 % 0.12 W 1206
C101 2310343 Ceramic cap. 22 p 5 % 50 V 0805
C102 2310343 Ceramic cap. 22 p 5 % 50 V 0805
C103 2310343 Ceramic cap. 22 p 5 % 50 V 0805
C104 2310343 Ceramic cap. 22 p 5 % 50 V 0805
C105 2310343 Ceramic cap. 22 p 5 % 50 V 0805
C106 2310784 Ceramic cap. 100 n 10 % 25 V 0805
C107 2310343 Ceramic cap. 22 p 5 % 50 V 0805
C108 2310343 Ceramic cap. 22 p 5 % 50 V 0805
C109 2310424 Ceramic cap. 100 p 5 % 50 V 0805
L103 3641306 Chip coil 5 % Q=33/25 MHz 1008
L104 3606946 Ferrite bead 0.2r 26r/100mhz 1206 1206
L106 0164030 Choke 9 u
X101 5469778 Accessory connector hd720 smd SMD
X102 5416638 Connector 8–pole right angle 1.5 1.5
9853923 PCB DH1 29.5X42X1.6 D 12/PA
9853923 PC board DH1 29.5x42x1.6 d 12/pa
Original 50/96
Page – 7
After Sales
Mobile Base MCH–8
Exploded View
Technical Documentation
Page – 8
Original 50/96
After Sales
Technical Documentation
Mobile Base MCH–8
Assembly Parts
ITEM Q’TY CODE DESCRIPTION VALUE, TYPE
1 9450280 Front cover 1D 23116
2 9460094 Synchro element 1D 23119
3 2 9460093 Locking knob 1D 23118
4 2 9460095 Release slide 2D 23357
5 2 9450278 Release button 1D 23117
6 9460135 Pushing slide 1D 24549
7 2 6400088 Slide spring 4D 24036
8 9560013 Spring 4D 23226
9, 10 9780089 RF cable 4C 22839
11 9780088 HFJ cable 4C 22493
12 9450279 Bottom cover 1D 23115
13 4 6293010 PT screw KB22x8 FeZn black
15 9380154 Type label (print made in Finland 4D 23469) Nokia
15 9380154 Type label (print made in Finland 4D 23527) AT&T
15 9380154 Type label (print made in Scotland 4D 25712)
15 9380154 Type label (print made in USA 4D 25893) Nokia
16 6400318 Cable tie 2.3x80 black
17 6293447 PT screw KB22x5 FeZn blk
18 2 9560012 Slide spring 4D 23359
C1 0200182 Mobile base module DH1
Original 50/96
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After Sales
Mobile Base MCH–8
Technical Documentation
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Original 50/96
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