DIGITAL LOUNGE (serv.man15) - Harman Kardon Audio Service Manual (repair manual). Page 32

 

Design Requirements

 

CONRAC Number 

Rev. 1.12 

Status: 04.05.2006 

Page 27/39

 

Copyright © CONRAC GmbH. All rights reserved. For internal use only 

Nur für internen Gebrauch. Alle Rechte vorbehalten

 

Pflichtenheft AV5, REV 1.12 

4042-6350-9601

 

Characteristics of the monitor input circuit 
 

• Threshold 

voltage: 

1.2 V - 1.5 V typ. 

•  High level noise margin: 

0.5 V typ., 0.3 V min. 

•  Low level noise margin: 

0.4 V typ., 0.2 V min. 

• Impedance: 

≥ 2.2 kΩ 

 

- Noise 

immunity: 

 
The inputs shall have a hysteresis of 0.4 V min., (0.8 V typ). 
Without hysteresis the following condition has to be met: 
If there is a second transition of a sync. signal through the threshold region within 100 ns after a trigger 
event, it may not cause any malfunction of the monitor. 
 

- 

DDC-Signals on DVI connector: 

 

•  DDC Serial Data: 

Pin 7, I

2

C-BUS 

•  DDC Serial Clock: 

Pin 6, I

2

C-BUS 

 
 

4.2.2  Digital input HDMI  and  DVI-I 
 
 

• Signal 

format: 

Panel Link 

TM

 TMDS 

 

(Transmission Minimized Differential Signalling) 

•  R/G/B color depth: 

8 bit 

•  Dot clock rate: 

110 MHz max. (Single Link) 

• Signals: 

1 channel TMDS 

 

- TMDS data: 

TX0+/-, TX1+/-, TX2+/- 

 

- TMDS clock: 

TXC+/- 

 

- not used: 

TX3+/-, TX4+/-, TX5+/- 

• DDC: 

SDA, SCK : I

2

C-BUS 

 

The HDMI and DVI-D input is equipped with HDCP 

- Video 

Blanking 

 

The video will be blanked for a period of 1 s to 2 s during change of modes or if undefined signals are 
applied. No switching effects are visible! 
 

- 

DDC Signals on DVI connector see above 

- 

DDC Signals on HDMI connector: 

 

•  DDC Serial Data: 

Pin 16, I

2

C-BUS 

•  DDC Serial Clock: 

Pin 15, I

2

C-BUS 

 

DL HT32 - HT40 - HT46

Harman Consumer Group International