Nokia 8110 Service Manual
After Sales Technical Documentation
NHE–6 and NHK–6 Series Transceivers
Chapter 5
UIF MODULE GU8
Original 07/97
NHE–6, NHK–6
After Sales
UIF Module
CHAPTER 5 – UIF MODULE GU8
Contents
Introduction Page 5–3
External Signal and Connections Page 5–3
UIF Module Main Connector, X400 Page 5–3
LCD Display Module Connector X401 Page 5–4
Technical Outline Page 5–5
Mechanics Page 5–5
Electronics Page 5–6
Functional Description Page 5–6
Circuit Description Page 5–6
Circuit Diagram of GU8 Page 5–9
Layout Diagram of GU8 Page 5–10
Parts List of GU8 (EDMS issue: 1.9) Page 5–11
Technical Documentation
Page 5–2
Original 07/97
After Sales
NHE–6, NHK–6
Technical Documentation
Introduction
This document describes the UIF module GU8. GU8 is used in both GSM
(NHE–6) and PCN (NHK–6) transceivers.
External Signal and Connections
There are two connectors in this module: X401 (the Display Module Connector)
and X400 (UIF Connector)
UIF Module Main Connector, X400
Pin/Conn Line Symbol Notes
1/X400 MICP Positive Mic terminal
2/X400 MICN Negative Mic terminal
UIF Module
• min/typ/max : 0...2...12.5 mVAC
• min/typ/max : 0...2...12.5 mVAC
3,6,30/X400 GND Digital ground
4/X400 VL Logic voltage
• min/typ/max : 3.0...3.16...3.3 V
5/X400 SYSRESET X Reset for display driver
7/X400 KEYLIGHT Keymat backlights OFF
• min/typ/max : 0...0...0.2 V
Keymat backlights ON
• min/typ/max : 2.8...3.16...3.3 V
8/X400 LCDLIGHT LCD backlights OFF
• min/typ/max : 0...0...0.2 V
LCD backlights ON
• min/typ/max : 2.8...3.16...3.3 V
9/X400 BUZZER Ground
10/X400 GND
11/X400 SLIDEON Slide pos. sensing
• min/max : 0...3.3 V
12/X400 GENSCLK Display data clk LOW
• min/typ/max : 0...0...0.6 V
Display data clk HIGH
• min/typ/max : 2.4...3.16...3.3 V
Original 07/97
Page 5–3
NHE–6, NHK–6
After Sales
UIF Module
Pin/Conn Line Symbol Notes
13/X400 GENSD Display data line LOW
14/X400 LCDENX Display driver Enable
15/X400 VB Battery voltage
16/X400 XPWRON Power key free, pull up in PSCLD
17/X400 EARN Negative Earpiece Terminal
Technical Documentation
• min/typ/max : 0...0...0.6 V
Display data line HIGH
• min/typ/max : 2.4...3.16...3.3 V
• min/typ/max : 0...0...0.9 V
Display driver Disable
• min/typ/max : 2.4...3.16...3.3 V
• min/typ/max : 5.3...6.0...10.26 V
• min/typ/max : 5.3...6.0...10.26 V
Power key pressed
• min/max : 0...0.4 V
• min/typ/max : 0...14...220 mVAC
18/X400 EARP Positive Earpiece Terminal
19/X400 CALL_LED Call indicator LED OFF
20–25/X400 UIF(0:5) LCD driving and keyboard ROW
26–29/X400 COL(0:3) Column scan for key matrix
LCD Display Module Connector X401
Pin/Conn Line symbol Signal description
1/X401 V5 LCD driver supply voltage
2/X401 V4 LCD driver supply voltage
3/X401 V3 LCD driver supply voltage
4/X401 V2 LCD driver supply voltage
• min/typ/max : 0...14...220 mVAC
• min/typ/max : 0...0...0.4 V
Call indicator LED ON
• min/typ/max : 2.4...3.16...3.3 V
reading
Page 5–4
5/X401 V1 LCD driver supply voltage
6/X401 VDD Supply voltage
7/X401 VR Voltage adjustment pin
8/X401 VOUT DC/DC voltage converter capacitor
9/X401 CAP2– DC/DC voltage converter capacitor
Original 07/97
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