29A-FD5
29A-FD8
NoNo
Check D1664 and its peripherals.
No
Check Q2801, IC402, IC451, IC5461 and their peripherals.
Improper colour.YesYesYesNo
Turn on Colour system forced switch. Does colour appear?Is chroma input level of IC2801 proper? Ref. Value: 100 ~ 500mVp-p.Is SCP signal waveform at pin (2) of IC2801 proper?Is FBP signal waveform at pin (25) of IC2801 proper?Check IC2801.
Fix control to coloured system.
Yes
No
Check IC2801.Check IC2801 and its peripherals.PAL, SECAM, NTSC4.43: Check X2401, IC2801 and their peripherals.
D
YesNoNo
Colour control circuit detective. Colour saturation control does not work.Turn up and down Colour control. Does colour gain go up and down?Can the sub-colour be readjusted in service mode?SET SUB- ColourNTSC3.58: Check X2402, IC2801 and their peripherals.
COLOUR PRODUCED
No
White balance: Check RGB output circuit of IC2801.Check IC2806.
Yes
TROUBLE SHOOTING TABLE (Continued)Are signal waveforms at pins (10) and (11) of IC2901 proper?
YesYesYesNo
Colour in B/W mode.
Turn Colour control to minimum. Does colour disappear?Killer circuit: Check IC2801 and its peripherals.Check IC2801, IC2807 and PIP unit.Are signal waveforms at pins (29) and (30) of IC2806 proper?
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