Nokia 252 Deskstand Charger

Programmes After Market Services

NHA–3 Series Transceivers

CGH–10 Deskstand

Charger

Issue 2 06/98

NHA–3

PAMS

CGH–10 Deskstand Charger

Technical Documentation

CONTENTS

Introduction 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chargers 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Batteries 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Phones 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Circuit Information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Spare Battery Charging Circuit Operation 5. . . . . . . . . . . . . . . . . . . . . . . .

Pass Transistor And Drive Circuits 5. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage Sensing 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Current Sensing 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rear Slot Timer 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page No

REQA 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

BSI Sensing 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Protection 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I/O Specification 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–Wire DC Jack Socket 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Phone System Connector 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rear Slot Connector 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Lists 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mechanical Layout 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

Figure 1. Deskstand Block Diagram 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2. CGH–10 Circuit Diagram (PA1_07) A1. . . . . . . . . . . . . . . . . . . . . . .

Page 2

Issue 2 06/98

PAMS

NHA–3

Technical Documentation

Introduction

This document describes the CGH–10 deskstand charger and its
operation for use with the H700 phone, spare batteries, and chargers.
The CGH–10 deskstand will mechanically support the H700 phone and
spare battery on a desk or tabletop surface. No discharge function is
present on the deskstand and a single green LED shows when the battery
in the rear slot is charging.

Chargers

The CGH–10 will be powered from either the ACP–9 Performance Travel
Charger or ACP–7 Travel Charger only.

Batteries

The CHG–10 will charge the following battery packs in the spare battery
slot:
BMH–2 (540mAh NiMH, Lightweight 3xAAA)
BKH–6 (1100mAh NiCd, Standard 3xAA)
BKK–6 (1100mAh NiCd, Standard 3xAA)
BKM–6 (1100mAh NiCd, VIBRA 3xAA)

CGH–10 Deskstand Charger

Phones

The CGH–10 will support the following four versions of the H700 phone:
NHA–3NA (Nokia 1, AMPS/NAMPS)

NHA–3ND (Nokia 1, No Authentication)
NHA–3NE (Nokia 2, AMPS/NAMPS)
NHA–3NH (Nokia 2, No Authentication)

Issue 2 06/98

Page 3

NHA–3

PAMS

CGH–10 Deskstand Charger

Circuit Information

The deskstand will connect with the H700 phone, spare battery and
charger as indicated in Figure 1.

Technical Documentation

H700 Phone – sits in the
front slot of the deskstand.

ACP–7 standard charger or
ACP–9 fast charger.

REQA

LED and

reset logic

LED

CGH–10 Deskstand

CHRGCTRL

Charger power lines

20 hour
timer

BTEMP

Rear slot
charger

VBATT

BSI

Battery – sits in
rear slot on the
deskstand.

Page 4

Figure 1. Deskstand Block Diagram

Issue 2 06/98