encoder

Encoder  internal part

Always frequency =306hz  and  power output(Rf -output)= 100 db

ic-AC7876

1520

8 leg ic 

https://www.youtube.com/watch?v=Ii8YTCXgu9s

cable tester

first check which led is not glow. and check led by multimeter and diode. as shown in figure

system analyzer internal part

R-2670 FDMA 

Digital communications system analyzer

cmos,nmos,pmos

why cmos called inverter

Types of STB

poe switch

if you want to run only DC power supply .Then you remove ac power and check dc power to 12v then easily to replaced by DC 12v Adapter. How to show in below video

hdmi

HDMI (High-Definition Multimedia Interface)
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HDMI internal part configuration

Pin1-TMDS Data2+	Pin2- ground or  data shield	Pin3-TMDS Data 2-
Pin4 - TMDS Data 1+	Pin5-groun d or data shield	Pin6- TMDS Data 1-
Pin7- TMDS Data 0+	Pin8 –ground or data shield	Pin9- TMDS Data 0-
Pin10- TMDS clock+	Pin11-Ground or data shield	Pin12- TMDS clock-
Pin13-CEC	Pin14- No connection	Pin15- SCL(DDC)
Pin16- SDA(DDC)	Pin17-Ground	Pin18-5v(min 0.055A)
Pin19 –Hot  plug detected

Ground=2(pin2)

Next Ground=2+3=5 

Next Ground=5+3=8

Next Ground=8+3=11

Next Ground=11+3=14(NC)

Next Ground=14+3=17

Full form

TMDS(Transition Minimized Differential Signaling )

CEC(Consumer Electronics Control)

Pin14- No connection (reserved for future used) or HEAC+

Pin17-Ground (for DDC, CEC, ARC, and HEAC)

HEAC utilizes two lines from the connector: the previously unused Reserved pin (called HEAC+) and the Hot Plug Detect pin (called HEAC−)

SCL (serial clock line) (I²C serial clock for DDC)

SDA (serial data line (I²C serial data for DDC)

DDC(Display Data Channel)

Types of HDMI

      Types    Width (mm)          Height (mm)                   Pin

         A             13.9                                  4.45                           19(MALE)

         A              14                                    4.55                             19 (FAMALE)

         B             21.5                                  4.45                            29(MALE)

         C            10.42                                2.42                             19

         D            6.4                                   2.8                                19

HDMI version

1) Hdmi1.0

- released on December 9, 2002

2) Hdmi 1.1

- released on May 20, 2004(after 1 year 5 months 11 days)

3) Hdmi 1.2

- released on August 8, 2005(after 1 year 2 months  18 days)

4) Hdmi 1.2a

- released on December 14, 2005(after 4 months  6 days)

5) hdmi 1.3

- released on June 22, 2006((after 6 months  8 days)

6) Hdmi 1.3a

- released on November 10, 2006(after 4 months  18 days)

7) Hdmi 1.4

- released on May 28, 2009(after 2 year 6 months  18 days)

8) hdmi 1.4a

- released on March 4, 2010(after 1 year 4 months  6 days)

9) hdmi 1.4b

- released on October 11, 2011(after 1 year 7days)

10)hdmi 2.0

- released on September 4, 2013(after 2 year 10 months 23 days)

11)hdmi 2.0a

-released on April 8, 2015(after 1 years 7 months 4 days)

12)hdmi 2.0b

-released March, 2016( after 10 months)

13)hdmi 2.1

-released on November 28, 2017(after 1 years  8 months 28 days)