Haier HTR13 Service Manual page 6

AGC Adjustment
Receive 60dBµ (1mV) VH colour bar pattern signal.
Select RF AGC item.
Adjust value, to noise reduce gradually and just disappeared point.
CRT cut off and white balance adjustment
a) CRT cut off adjustment
1. Select item VG2B, then adjust value to 32.
2. PRESS "MENU" key to page 2, when the screen shows"VK" adjust the SCREEN control on Fly back
transformer to make the screen show alternating flashing characters to darkle.
b) White balance adjustment
1. Receive a Black and White pattern.
2. Adjust RC , GC, BC,RD,BD items to get colour temperature 9300K ±3 JND.
A3. Error Detection Process
1.
Check D901~D904,
C914, IC9601, Q901
Check to see if the
collector voltage of
D909 is 13.5V
Normal
Check to see
if , ZD201 8v,
is normal
Normal
The failure of horizontal
The failure ofhorizontal unit
unit or IC201
orN204
No light and sound
Check to see if
Fuse is normal
Normal
Normal
Abnormal
Check the control
voltage of Q207 or
CPU power pin
Abnormal
Check IC602 ,ect
Maintenance Service and Trouble shooting
Abnormal
Check to see 110V、180V
etc. voltage is normal
Abnormal
T est to see all terminal
Resistance of load
Normal
Check to see if
Check switch
rectifying tube
power unit
Normal
Check the
Loader
6
Abnormal
is normal
Abnormal
Change
rectifying diode