Sharp VC-ME80HM Service Manual ▷ View online
45
VC-ME80GM
VC-ME80HM
VC-ME80HM
NO
NO
NO
YES
Is there picture signal
inputted in the pin(1) of
IC4409?
FLOW CHART NO.18 E-E MODE TROUBLESHOOTING
No picture E-E signal.
NO
NO
NO
NO
YES
YES
YES
YES
Is there picture signal inputted
in the pins(28) and (31) of
IC201?
1
For ext. input mode
■
Check line between rear video input terminal and pin(31) of IC201.
■
Check line front video input terminal and pin(28) of IC201.
2
For U/V tuner mode
■
Check line between video output terminal of tuner and pin(31) of
IC201.
Is the supply voltage of 5V
(Y-Vcc) fed to pin(12) of
IC201?
Check PC 5V line.
NO
Check line between pin(5) of
IC4503, and pin(49) of IC701.
YES
YES
YES
YES
Check peripheral circuit of
Q708.
NO
Check the line between Q708
and IC2501.
Is there picture signal
inputted in the pin(19) of
IC2501?
Is there Y/C serial data and
Y/C clock signal applied to
pins(63) and (62) of IC201?
Check line between pins(63),
(62) of IC201 and pins(56),
(57) of IC701.
NO
Is the supply voltage of 5V
(OSD-Vcc) fed to pin(51) of
IC701?
Replace IC201.
NO
Check PC 5V line.
YES
NO
Check peripheral circuit of
IC2501.
YES
1
Line output : Check the line between IC2501 peripheral and
output terminal periphery.
2
RF output : Check the line between Q708 peripheral and RF
video input terminal of tuner periphery.
Is there picture signal
outputted in the pin(20) of
IC2501?
Is there picture signal
outputted in the pin(52) of
IC201?
NO
NO
NO
YES
YES
Is a "L" level applied at pin(12)
of IC4503.
Check line between pin(11) of
IC701 and pin(12) of IC4503.
Is there picture signal inputted
in the pin(11) of IC4503?
Check line between pin(52) of
IC201 and pin(11) of IC4503.
YES
Is there picture signal inputted
in the pin(7) of IC4501?
NO
YES
YES
YES
YES
Is there picture signal
outputted in the pin(14) of
IC4501?
YES
Is a "L" level applied at pin(7)
of IC4503.
YES
Is a "L" level applied at pin(2)
of IC4409.
Is normal output level
obtained after adjustment of
AGC volume R4501?
YES
NO
Is there a picture signal
outputted in the pin(6) of
IC4503?
Check line between pin(11) of
IC701 and pin(6) of IC4503.
NO
NO
Check line between pin(35) of
IC701, and pin(2) of IC4409.
NO
NO
NO
Check line between Emitter of
Q4401 and pin(1) of IC4409.
NO
YES
Is there picture signal
outputted in the pin(6) of
Q4421?
Check line between pin(7) of
IC4409, Q4418, Q4420,
Q4421 peripheral circuit and
pin(6) of Q4421.
YES
Is there picture signal
outputted in the pin(7) of
IC4409?
Replace IC4409.
Check line between S-terminal
and pin(7) of IC4501.
Replace IC4503.
NO
NO
YES
YES
YES
Is a "H" level applied at pin(2)
of IC291.
Check line between S-terminal
and pin(2) of IC291.
Is there picture signal
inputted in the pin(3) of
IC291?
NO
Is there picture signal
outputted in the pin(7) of
IC291?
Check line between pin(6) of
Q4421 and pin(3) of IC291.
NO
Is there picture signal
inputted in the pin(28) of
IC201?
Check line between pin(6) of
IC291 and pin(28) of IC201.
Replace IC201.
Replace IC4501.
Is there picture signal
outputted in the emitter of
Q4401?
Check line between pin(14) of
IC4501 and pin(8) of IC4503.
Check peripheral circuit of
Q4401.
Replace IC4503.
Is there picture signal
outputted in the pin(5) of
IC4503?
Is there picture signal
inputted in the pin(49) of
IC701?
Is there picture signal
outputted in the pin(47) of
IC701?
In case of S-terminal input
Is there picture signal
outputted in the emitter of
Q708?
46
VC-ME80GM
VC-ME80HM
VC-ME80HM
NO
NO
YES
FLOW CHART NO.19 RECORDING MODE (E-E operational) TROUBLESHOOTING
Picture(Luminance) record is impossible
(E-E mode is possible).
Is there luminance signal input
in the pin(19) of IC201?
Check line between pins(18)
and (19) of IC201.
YES
NO
Is there luminance signal input
in the pin(42) of IC201?
Check line between pins(21)
and (42) of IC201. (C208)
NO
YES
YES
YES
YES
Is there luminance signal input
in the pin(26) of IC201?
Check line between pins(39)
and (26) of IC201. (C212)
NO
Is there luminance signal input
in the pin(23) of IC201?
Check line between pins(24)
and (23) of IC201. (C210)
NO
Is there luminance signal 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)
Is there luminance signal input
in the pin(39) of IC201?
Is voltage 5V applied to the
CCD section power terminal at
pin(36) of IC201?
YES
Is CCD control voltage approx.
6V applied normally to the pin
(37) from pin(57) of IC201?
Is clock signal for CCD applied
normally to the pin(44) from
(69) of IC201?
NO
NO
YES
YES
YES
Is voltage of 5V applied to the
chroma power terminal pin(61)
of IC201?
Check peripheral circuit pin
(61) of IC201 and PC 5V line.
Is there chroma signal input in
the pin(46) of IC201?
Check line between pin (60)
and pin(46) of IC201. (C512)
NO
NO
Is there chroma signal input in
the pin(58) of IC201?
Check whether the pins(73)
and (75) of IC201 oscillate
4.43MHz.
Check line between pins(58)
and (35) of IC201. (C515)
Is there chroma signal output
in the pin(35) of IC201?
YES
YES
Is CCD control voltage approx.
0V applied normally to the pin
(37) from pin(57) of IC201?
Is clock signal for CCD applied
normally to the pin(44)
from (69) of IC201?
YES
Is voltage 5V applied to the
CCD section power terminal at
pin(36)?
NO
Although picture record is possible, colour does
not appear in PAL mode (E-E mode is possible).
YES
Replace IC201.
YES
Check or replace the cylinder.
NO
Is the supply voltage of 5V
(PRE/REC Vcc) fed to pin(90)
of IC201?
SP mode : Is there record FM signal (approx. 20mVp-p) output in the pins
(88), (89) <SP1> and pins(86), (87) <SP2> of IC201?
EP mode : Is there record FM signal (approx. 20mVp-p) output in the pins
(93), (94) <EP1> and pins(92), (91) <EP2> of IC201?
SP mode : Is there chroma ingredient included signal (approx. 20mVp-p) output in the pins(88), (89) <SP1>
and pins(86), (87) <SP2> of IC201?
EP mode : Is there chroma ingredient included signal (approx. 20mVp-p) output in the pins(93), (94) <EP1>
and pins(92), (91) <EP2> of IC201?
NO
Check parts around of X501.
47
VC-ME80GM
VC-ME80HM
VC-ME80HM
NO
FLOW CHART NO.20 PLAYBACK MODE TROUBLESHOOTING
Playback picture does not appear(E-E mode is possible).
Is there FM signal input in the
pin(78) of IC201?
Check line between pins(79)
and (78) of IC201.
NO
YES
NO
YES
NO
Is there luminance signal
output in the pin(79) of IC201?
YES
YES
YES
YES
YES
YES
Is the supply V-H.SW.P.
signal fed to pin(81) of IC201?
NO
NO
NO
Is there luminance signal input
in the pin(23) of IC201?
Check line between circuit of
pins(39) and (26) of IC201.
(C212)
Is CCD control voltage approx. 5V applied normally to the pin(37) from pin(57) of IC201?
Is clock signal (approx. 8.86MHz/0.5Vp-p) for CCD applied normally to the pin(44) from (69) of IC201?
Is there luminance signal
output in the pin(39) of IC201?
Check peripheral circuit of pins
(13), (14) and (17) of IC201.
S-PICTURE circuit (Q201-6).
NO
Is there luminance signal input
in the pin(19) of IC201?
Check line between pins(18)
and (19) of IC201. (C206)
NO
Is there luminance signal input
in the pin(42) of IC201?
Check line between pins(21)
and (24) of IC201. (C208)
NO
NO
YES
YES
YES
YES
Is voltage of 5V applied to the
chroma power terminal pin(61)
of IC201?
Check peripheral circuit
pin(61) of IC201 and PC 5V
line.
NO
Is there chroma signal input in
the pin(46) of IC201?
Check line between pin(60)
and (46) of IC201. (C512)
NO
Is there chroma signal input in
the pin(58) of IC201?
Check whether the pins(73)
and (75) of IC201 oscillate
4.43MHz.
Check line between circuit of
pins(58) and (35) of IC201.
(C515)
Check parts around of X501.
YES
NO
Is there chroma signal output
in the pin(35) of IC201?
YES
Although picture playback is possible, colour does not
appear in PAL mode (E-E mode is possible).
Replace IC201.
Replace IC201.
Check V-H.SW.P. line.
Is voltage 5V applied to the CCD section power terminal at pin(36) of IC201?
Check line between circuit of pins(24) and (23) of IC201. (C210)
Is there luminance signal input
output in the pins(13), (14)
and (17) of IC201?
Is there luminance signal input
in the pin(26) of IC201?
FLOW CHART NO.21 VIDEO INPUT TROUBLESHOOTING
Video insertion is impossible
(however, REC is possible).
NO
YES
YES
NO
When an image is recorded, it is overwritten on the existing image
(the image of insertion section is not cleared).
Is "H" level obtained also
when the Q673 base is in
video insertion state?
Check the line from SC301 to
P671.
In video insertion mode
Is there 10MHz oscillation
signal between pins(1) and
(2) of P671? (approx. 9Vp-p)
Check the peripheral circuit
of FL671, Q671 and Q672.
Check the line between the
pin(19) of IC701 and the Q673
base.
48
VC-ME80GM
VC-ME80HM
VC-ME80HM
YES
YES
YES
YES
NO
NO
NO
YES
YES
YES
NO
NO
YES
NO
NO
NO
NO
NO
YES
FLOW CHART NO.22 Hi-Fi SOUND MODE TROUBLESHOOTING(1)
Is there audio signal inputted at each input
terminal of IC6651 as shown in table?
Tuner input terminal.
(Audio sourse)
Front A/V input terminal.
E1 input terminal.
(Audio sourse)
L-ch R-ch
pin(13)
pin(8)
pin(15)
pin(10)
pin(13)
pin(8)
Check line ranging from pins(31), (30) of
IC1701(NICAM/IGR), to the each input
terminal of IC2501(decorder circuit).
Check line ranging from front audio input
terminal(J2301), to the each input terminal
of IC6301.
Check line ranging from pins(31), (30) of
IC2501(decoder circuit) or audio input
terminal, to the each input terminal of IC6651.
Is the supply voltage of 5V fed to pins(25),
(40) and 9V fed to pin(58) of IC6651?
Check line between pin(36) of IC6651 and
pin(21) of IC701.
Is there audio signal outputted at pin(11) of
IC201?
Check line between pin(11) of IC201 and
pin(62) of IC6651.
Is there "L" level at pin(36) of IC6651?
Check line between pin(36) of IC6651 and
pin(21) of IC701.
Is there audio signal inputted at pin(62) of
IC6651?
Line output terminal : Is there audio signal outputted at pins(53) and (57) of IC6651?
RF output terminal : Is there audio signal outputted at pin(59) of IC6651?
Line output terminal : Check line ranging from pins(53) and (57) of IC6651 to the audio output
terminal.
RF output terminal : Check line ranging from pin(59) of IC6301 to the audio input terminal of tuner
(TU1501).
Are there the serial data and clock at pins
(42) and (43) of IC6651?
Check line between pins(42), (43) of IC6651
and pins(17), (18) of IC701.
Check PC 5V and PC 9V lines.
<For Hi-Fi mode>
NO
NO
NO
Is there audio signal inputted at each input
terminal of IC201 as shown in table?
Beeper input terminal.
U/V tuner audio input terminal.
E1 input terminal.
pin(7)
pin(8)
pin(9)
Check line ranging from pin(97) of IC701.
Check line ranging from IF circuit.
Check line ranging from pin(61) of IC6651.
Replace IC201.
Replace IC6651.
Is there "L" level at pin(99) of IC201?
<For normal audio mode>
No Hi-Fi E-E sound heard.
Click on the first or last page to see other VC-ME80HM service manuals if exist.