Sharp VT-3448X Service Manual page 57

VCR RECORDING MODE (LUMINANCE) TROUBLESHOOTING
8 Is there a signal at pin (6) NO
of IC2201 ?
I
Is there a signal at pin (26)
of IC3301 (AN3363S) ?
YES
pin (35) of 1~3301 at
IS
I
Replace cylinder. 1
I I
FLOWCHART NO. 1-13
No record.
Are there Y/C data and
clock signals at pins (17)
and (18) of IC2201
respectively when
recording starts ?
Check pins (77), (78)
and peripheral circuit.
I
Check the signal line all
line.
I
VCR RECORDING MODE (CHROMA) TROUBLESHOOTING
Record is in black and white (E-E colour mode).
Are there Y/C data and
clock signals at pins (17)
and (18) of IC2201
respectively when
recording starts ?
Is there a signal at pin
Is there 5V at pin (54)
and (14) of IC2201 ?
Is there a (Chroma)
NO
signal at pin (26) of
---l-=-
Is there chroma rotatron
pulse at pin (16) of
Check the signal at pin
NORMAL
(Frequency, 4.43MHz
1
(PAL), Frequency,
FLOWCHART NO. 1-14
Check data
and clock
signals from IC7701.
YES
Check the PC5V line.
Check the signal line all
the wav up to pin (15) of I
.
Check the chroma
rotation pulse line.
YES
ABNORMAL
Check X5501, X5502 and