Read LG 32LH7000 / 32LH7020 / 32LH7030 (CHASSIS:LD91D) Service Manual online
- 16 -
3. AV 1/2 doesn’t display
Check JK 200, JK20 1
Can you see t he normal wavefo rm?
NO
JK20 0, JK20 1 may have problem. Rep lace th is
Jack.
Check th e output of Main IC(IC100).
Esp ecially you sh ould ch eck
The H,V sync and c loc k.
Can you see t he normal wavefo rm?
YES
NO
After ch eckin g th e Power of Main IC(IC100) you
should decide to replace Main IC or not .
This bo ard has b ig problem becau se Main
IC(IC100) have some troubles.
Afte r c hecking thoroughly all path once again,
You sh ou ld decid e to rep lace Main Bo ard or no t.
YES
4. Component doesn’t display
Check JK 304
Can you see t he normal wavefo rm?
Check th e in pu t o f Compo nent Audio
switch (IC405 in th e Jack Bo ard ),
Can you see t he normal wavefo rm?
Check th e output of Comp on ent Audio
switch (IC405 in th e Jack Bo ard ) ,
Can you see t he normal wavefo rm?
YES
YES
YES
NO
JK30 4
may have problem. Rep lace th is Jack.
NO
Afte r c hecking the Power of compone nt Audio
switch, y ou should decide to replace component
Audio s witch or not.
NO
Afte r c hecking the Power of compone nt Audio
switch y ou should decide to replace component
Audio s witch or not.
Check th e output of Main IC(IC100).
Esp ecially you sh ould ch eck
The H,V sync and c loc k.
Can you see t he normal wavefo rm?
YES
NO
After ch eckin g th e Power of Main IC(IC100) you
should decide to replace Main IC
or not.
This bo ard has b ig problem becau se Main
IC(IC100) have some troubles.
Afte r c hecking thoro ugh ly all pa th onc e again,
You sh ou ld decid e to rep lace Main Bo ard or no t.
Click on the first or last page to see other 32LH7000 / 32LH7020 / 32LH7030 (CHASSIS:LD91D) service manuals if exist.