43
VC-TA350/TA351/351W
VC-TA352W/TA355/TA356
FLOW CHART NO.21 RECORDING MODE TROUBLESHOOTING
Picture (Luminance) record is impossible (E-E mode is possible).
NO
NO
NO
NO
NO
YES
Is there luminance signal (approx. 0.5Vp-p)
input in the pin (19) of IC201?
Check line between pins (18) and (19) of IC
201.
YES
Is there luminance signal (approx. 0.3Vp-p)
input in the pin (42) of IC201?
Check line between pins (21) and (42) of
IC201 (C208).
YES
Is there luminance signal (approx. 0.5Vp-p)
input in the pin (23) of IC201?
Check line between pins (24) and (23) of
IC201 (C210).
YES
Is there luminance signal (approx. 0.5Vp-p)
input and output in the pins (13) and (14) of
IC201, respectively?
Check peripheral circuit of pins (13) and (14)
of IC201 (R201,R202, C203).
YES
YES
Is there luminance signal (approx. 0.5Vp-p)
input in the pin (26) of IC201?
Check line between pins (39) and (26) of
IC201 (C212).
NO
Is there luminance signal (aprox. 0.5Vp-p)
input in the pin (39) of IC201?
YES
Is voltage 5V applied to the CCD section
power terminal at pin (36) of IC201?
Is CCD control voltage approx. 5V applied
normally to the pin (37) from pin (57) of IC201?
Is clock signal (approx.
8.86MHz<PAL mode> or
7.16MHz<NTSC mode>/0.5Vp-p)
for CCD applied normally to the pin (44) from
(69) of IC201?
Although picture record is possible, colour does not appear in
PAL or NTSC mode (E-E mode is possible).
NO
NO
NO
YES
Is voltage of 5V applied to the chroma power
terminal at pin (61) of IC201?
Check peripheral circuit pin (61) of IC201 and
Y/C 5V line.
Is there chroma signal
(approx. 156mVp-p <PAL mode> or
298mVp-p<NTSC mode>/burst)
input in the pin (46) of IC201?
Check line between pins (60) and (46) of
IC201 (C512).
Is there chroma signal (approx.
197mVp-p <PAL mode> or
375mVp-p<NTSC mode>/burst) input in
the pin (58) of IC201?
Check line between pins (58) and (35) of
IC201 (R505, C515).
YES
For PAL/SECAM mode.
Check whether the pins(73) and (75) of IC201 oscillate 4.43MHz.
For NTSC mode.
Check whether the pins(73) and (71) of IC201 oscillate 3.58NHz.
NO
YES
For PAL/SECAM mode.
Check parts arround of X501.
For NTSC mode.
Check parts arround of X502.
Is there chroma signal (approx.
197mVp-p <PAL mode> or
375mVp-p<NTSC mode>/burst) input in
the pin (35) of IC201?
YES
NO
SP mode:
Is there record FM signal (approx. 20mVp-p) output at pins (88), (89)
<<SP1>> and pins (86), (87) <<SP2>>of IC201?
LP(PAL, SECAM)/EP(NTSC) mode:
Is there record FM signal (approx. 20mVp-p) output at pins (93), (94)
<<EP1>> and pins (92), (91)<<EP2>>of IC201?
SP mode:
Is there chroma ingredient included signal (approx. 20mVp-p) output at
pins (88), (89)<<SP1>> and pins (86), (87)<<SP 2>> of IC201?
LP(PAL, SECAM)/EP(NTSC) mode:
Is there chroma ingredient included signal (approx. 20mVp-p) output at
pins (93), (94)<<SP1>> and pins (92), (91)<<SP 2>> of IC201?
YES
Check or replace the cylinder.
NO
YES
YES
Is the supply voltage of 5V (PRE/REV Vcc)
fed to pin (90) of IC201?
Replace IC201.
