19
Trouble shooting
1. No raster, No picture and No sound
2. Picture, but without sound
Check the indicator
Press the power button
Check if the pin10 of
CPU has low-level
output
Check if the N802 is
normal
Check if it has X-ray
protection
Check if it has
vertical protection
circuit
Check the FU501
Check the supply
power
Measure if the C516 is
about 150V
Check the D501
and peripheral
circuit
Check the N501, N502
and peripheral circuit
Light
No-light
No signal
Turn on
Check if the N602 output
Check if the pin2 and pin4 of
sound amplifier output
Check the supply power, the
pin5 of mute is low level
Check if sound-processing
N601 is normal.
Speaker damage
No
No
Yes
Yes
Summary of Contents for IS-TVHD30
Page 1: ...COLOR TELEVISION IS TVHD30 ...
Page 10: ...8 APPX horizontal and vertical scanning adjustment diagram ...
Page 11: ...9 ...
Page 19: ...17 6 LA72700V 5 SIF input 25 R output 11 SDA 26 L output 12 SCL 31 9V ...
Page 20: ...18 Wiring diagram ...
Page 23: ...21 Schematic diagram ...
Page 24: ......
Page 25: ......
Page 32: ...603 TJ3060 01 Ver 1 0 603 TJ27780 01 603 TJ27680 01 ...