After Sales Technical Documentation HANDSFREE DESKTOP CHARGER CHH–7 Original, 11/94 NMP Part No.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation AMENDMENT RECORD SHEET Amendment Number Page 2 Date Inserted By Comments Original, 11/94
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation HANDSFREE DESKTOP CHARGER CHH–7 CONTENTS Page No Introduction 5 Technical Summary 5 Operation 5 List of Modules 5 Basic Specifications 6 Technical Specifications 6 Modes of Operation 6 DC Characteristics 7 AC Characteristics 8 External Signals and Connections 9 Internal Signals and Connections 11 Mechanical Characteristics 12 User Interface Features 12 Charge States and Charge Control 13 Charge Indication to U
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Assembly 23 DC3H ModuleParts List 24 DC4H Module Parts List 32 List of Figures Figure 1: Block Diagram 16 Figure 2: Component Location Diagram 17 Figure 3: Exploded View 23 Figure 4: DC3H Circuit Diagram (Sheet 1) 33 Figure 5: DC3H Circuit Diagram (Sheet 2) 34 Figure 6: DC4H Circuit Diagram (Sheet 3) 35 Page 4 Original, 11/94
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation Introduction The CHH–7 Handsfree Desktop Charger provides both charging and handsfree facilities. The charger enables a phone plus a spare battery to be charged; the spare battery is charged after the phone battery has been charged. CHH–7 can only be powered by the AC Power Supply (ACS–6U/X/E); the supply is connected to the charger via a socket at the rear of the charger.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Basic Specifications Table 2. Basic Specifications Power Consumption 13W max. Input Voltage Range 13.5V to 21.0V Battery Charger: 10.0V to 13.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation DC Characteristics Table 3.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation AC Characteristics Table 5. External Microphone signal XMIC (1 kHz) TYPICAL/NOMINAL Cable level 0 dBmO 200mV 415mV Table 6. Handsfree Microphone Signal HFMIC (1 kHz) TYPICAL/NOMINAL MRP HFMIC +15.3dBPa / 50 cm (Mic Ref Point) input –4.7dBPa (approx 20dB attenuation) Gain for HFMIC 40dB Cable Level 200mV Table 7. External Earphone Signal XEAR (1 kHz) TYPICAL/NOMINAL Cable Level 0 dBmO 130mV 411mV Table 8.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation External Signals and Connections Table 10. List of External Connectors CONNECTOR MODULE NOTES DESCRIPTION SYSTEM DC4H CHH–7 <–––> Phone 10 connections SPARE BATTERY DC3H CHH–7 <–––> Spare Battery 4 contact springs DATA DC3H CHH–7 <–––> Data Accessory 10 pins modular connector DC DC3H CHH–7 <–––> Power Supply 6.3 mm DC–Jack Table 11.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Table 13. System Connector X701 (continued) PIN LINE SYMBOL PARAMETER MINIMUM TYPICAL/ NOMINAL MAXIMUM 3 HOOK Selects handsfree operation 0V 0V 0V 6 VC Supply / Charging 11V 730mA 12V 800mA 13V 830mA 10 GND Power supply ground 0V 0V 0V 4 XEAR / HFJPWR Earphone signal dc–level input impedance 130mV 2.5V 10kΩ CHH–7 power switch 5.0V (power off) 2.5V (power on) 0.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation Internal Signals and Connections Table 15. List of Internal Connectors CONNECTOR MODULE NOTES DESCRIPTION Internal System Connector DC3H/ DC4H DC3H: X500 <–> DC4H: X700 10 connections, flex foil Spare Battery Connector DC3H X101...X104 <––> Battery Conn. Contact Springs Speaker Connector DC3H X460 <––> Hf–speaker 2 connections, wires Microphone Connector DC3H X440 <––> Hf–microphone 2 connections, wires Table 16.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Table 18. Microphone Connector X440 / DC3H PIN 1 2 LINE SYMBOL HFMIC PARAMETER MINIMUM HF Microphone Output Voltage (without load) Input Impedance AGND TYPICAL/NOMINAL MAXIMUM 4.7V 1.0kΩ analogue ground 0V 0V 0V Mechanical Characteristics Table 19. Mechanical Characteristics UNIT DIMENSIONS (mm) WEIGHT (g) NOTES (W x H x D) CHH–7: Colour: Warm Black DCXH PCB includes DC3H and DC4H modules flex foil 155 x 1.6 x 94.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation Charge States and Charge Control Charge current for the phone is supplied through a series connected switching transistor located in the phone. When this transistor is on, the charger is supplying a constant current to the phone. This is the rapid charge mode. When the transistor is off, no current is supplied to the phone and the charger is in the constant voltage mode.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Table 20. Phone Operating Status PHONE OPERATING STATUS RIGHT HAND LED PHONE DISPLAY Desktop charger connected to mains – through ac adapter, phone disconnected – Rapid charge or waiting for the right temperature (+5 C to +45 C) red state A (bars illuminated sequentially) Battery full – trickle charge green state B (all bars steadily illuminated) Table 21.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation Environmental Conditions Temperature Conditions Table 22.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Functional Description Figure 1: Block Diagram DC CONNECTOR CHH–7 MODULE PHONE CHARGING INDICATION CHARGER RFI FILTER COMP.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation Figure 2: Component Location Diagram Original, 11/94 Page 17
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Circuit Description (DC3H) The DC3H–Module consists of the following functional blocks: – Supply Voltages – Control Logic – Battery Charging – Spare Battery Discharging – Watchdog Function – Switch Mode Power Supply – Microphone Amplifier and corresponding switches – Speaker Amplifier and corresponding switches Refer to Figures 4 and 5 for DC3H circuit diagrams (sheets 1 and 2). Control Logic Charging is controlled by processor D300.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation Table 24.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Table 27.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation Watchdog Function Under normal operating conditions the processor is pulsating the WATCHDOG–line in order to reset the power–off function of regulator N102. If the processor is not functioning correctly and hence the regulator does not send the pulse to the XPWROFF–line within the 100ms timeout period, the regulator reverts to its power–off state resetting the processor and switching the VAREF and +VAN voltages off.
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Spare battery voltage and V voltage are determined by reading the VBAT line state. Voltages are measured through resistor divider R250 / R251 and the amplifier N250–B. Spare battery size is determined by reading the BSI line state. This is pulled to the +5V reference voltage by R243. In the battery pack a ’size’ resistor is connected between BSI and GND. Temperature is measured over the BTEMP line.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation Assembly Figure 3: Exploded View 12 3X 9 1 2X 11 10 13 6 16 3X 8 5 7 4 3 1 6X 2 4X 14 15 Original, 11/94 ITEM 15 CHH–7X ONLY Page 23
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation Assembly Parts ITEM QTY CODE DESCRIPTION VALUE 1 8 6293012 Pt–Screw KB22x8 WN1442 2 4 6501067 Adhesive Foot D8.0 3 1 9450322 Bottom Cover D11403 4 1 5140444 Cond. Microphone 63 +/– 2dB 5 1 9460012 Microphone Pad 4D21140 6 1 7133160 Flex Foil 10x0.5, 0.
After Sales Handsfree Desktop Charger CHH–7 Technical Documentation R203 R204 R205 R206 R209 R215 R216 R218 R219 R220 R221 R222 R223 R230 R231 R232 R233 R234 R235 R236 R237 R238 R240 R241 R242 R243 R244 R245 R246 R248 R249 R250 R251 R252 R253 R254 R255 R256 R257 R258 R300 R301 1413635 1412430 1413917 1413635 1412423 1412536 1414533 1412536 1415632 1413917 1413917 1413603 1412423 1415576 1415576 1415576 1415576 1415576 1415576 1415576 1415576 1412430 1414533 1414452 1415664 1414283 1412423 1413603 141360
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After Sales Handsfree Desktop Charger CHH–7 Technical Documentation R441 R442 R443 R444 R445 R446 R447 R460 R461 R462 R463 R464 R500 R500 R501 R501 R502 R520 R530 R532 R533 R534 C100 C101 C103 C104 C109 C110 C111 C112 C114 C115 C116 C117 C118 C119 C120 C121 C122 C123 C124 C128 1413917 1413603 1414109 1414109 1412303 1412729 1413917 1413603 1414452 1412423 1413635 1413850 1412430 1412729 1412430 1412729 1413635 1412423 1413836 1412286 1413836 1412303 2310343 2310343 2309517 2501605 2501605 2309517 250273
Handsfree Desktop Charger CHH–7 After Sales Technical Documentation C129 C150 C151 C153 C154 C160 C210 C211 C212 C213 C220 C240 C241 C242 C243 C244 C250 C251 C252 C253 C300 C301 C302 C303 C310 C320 C340 C341 C341 C342 C343 C400 C401 C402 C403 C404 C405 C410 C411 C412 C413 C414 Page 28 2309884 2310544 2309517 2604431 2604431 2310449 2502736 2604209 2310343 2310343 2307816 2307816 2307816 2307816 2307816 2309517 2307816 2307816 2310449 2307816 2310343 2310343 2307816 2307816 2310343 2307816 2310544 230951
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Handsfree Desktop Charger CHH–7 After Sales Technical Documentation X500 X510 5431710 Flexfoil connect 1x10 0.8mm smd 5401050 Modular jack 10 shielded pcb DC4H Module Parts List ITEM CODE DESCRIPTION R706 C700 C701 C702 C706 C707 C708 L700 L701 L703 X700 X701 1413917 2310343 2310343 2310752 2310752 2310752 2310343 3606946 3608519 0164030 5431710 5469784 Chip resistor 150 5 % 0.063 W 0805 Ceramic cap. 22 p 5 % 50 V 0805 Ceramic cap. 22 p 5 % 50 V 0805 Ceramic cap. 10 n 20 % 50 V 0805 Ceramic cap.
