Sharp VC-MH80 Service Manual page 55

FLOW CHART NO.20 RECORDING MODE (CHROMA) TROUBLESHOOTING
Recording is possible but without colour. (E-E mode is possible.)
Is there signal at pin (56) of ICZOl?
YES
NO
NO
component at base of Q2821
FLOW CHART NO.21 RECORDING MODE (CHROMA) TROUBLESHOOTING (VC-MH80 ONLY)
Recording is possible but without colour in SECAM mode.
(E-E mode and PAL mode are OK)
Is 5V applied at pins
(19) and (30) of IC
Check peripheral
Is base signal of Q5303 biased?
circuit of 45301
YES
Is pin (6) of IC5301
"Low" level?
Check Q5303,Q590 and its
peripheral circuits.
Check between pin (55) of lC2gl
and the way up thru to pin (56) of
Check between pin (2) of IC201
and the way up thru to base of
NO YES
Check peripheral parts
of IC 5301.
NO
Check E-E line.
FLOW CHART NO.22 PLAYBACK MODE (LUMINANCE) TROUBLESHOOT
Playback is not possible.
I
lsthere 5~at pin (16) of
Replace lC301.
Check between pin (17) of IC301 and all the way up thru to pin
of lC2017 (51) of lC201 (Q201-203,Q206-209).
Check serial data and clock at pins (14) and (15) of IC201.
and (38) of IC201?
Is there a signal aa NO
Check between pin (36) and all the way up thru to pin (35) of
of IC2017
Is there a signal at pin (27)
of IC2017
Replace IC201.
NG
I
I
I
NO
Check PCSV line.
I
I