29WF30
C
No
Check Q400 and their peripherals.
NoNo
YesNo
NO COLOUR
Turn on colour control. Does colour appear?Turn on colour system forced switch. Does colour appear?Is chroma input level of IC800 pin (43) proper?Check D1664 and its peripherals.
No
YesYes
Yes
YesYes
Is only RF signal's colour abnormal?
Check TU200, Q455, IC400 and their peripherals.Is SCP signal waveform at pin (30) of IC800 proper?
Set colour control.Fix cotrol to coloured system.
NO SPECIFIC COLOURCheck IC850.17-2
Are signal waveforms at TP801 and TP802 proper?
No
TROUBLE SHOOTING TABLE (Continued)
PAL, NTSC4.43: Check X800, pin (12) of IC800 and their peripherals.Check IC800 and their peripherals.
YesYes
Yes
NoIs there audio signal at pin (2) and (5) of IC1300?Check IC1300, and their peripheral parts.
Set S-Volume at maximum. Do pins (12), (15) of IC300 work?No
Check IC300.
Yes
No
Is there audio signal at pins (3), (22) of IC300?Check IC400 peripheral parts.
Check IC301 and their peripheral circuit.
17-1
Is audio output terminal J400 normal.
NO NORMAL SOUNDNoYes
Check TU200 and its peripheral circuits of no problem, set the sound system inpositon.
Yes
No
Check TV sound.
Check IC400 and its peripheral circuit.
Change the sound system. Is sound normal?Is there audio signal at pins (46), (48) of IC400?No
TROUBLE SHOOTING TABLE (Continued)
Check TU200 peripheral parts.
17 |