Sharp VC-S2000 (serv.man2) Service Manual ▷ View online
45
VC-S2000HM
FLOW CHART NO.20 PLAYBACK MODE TROUBLESHOOTING
Playback picture does not appear. (E-E mode is possible.)
Is there FM signal (approx.0.3Vp-p)
inputted at pin(5) of IC501?
NO
YES
Is there luminance signal (approx.0.5
Vp-p) inputted at pin(19) of IC201?
YES
NO
Is there luminance signal (approx.0.3
Vp-p) inputted at pin(42) of IC201?
YES
NO
Is there luminance signal (approx.0.5
Vp-p) inputted at pin(26) of IC201?
YES
YES
Is there luminance signal
(approx.0.5Vp-p) outputted at
pin(39) of IC201?
YES
NO
Check line between pins(79)
of IC201 and pin(5) of IC501.
Although picture playback is possible, colour does not appear in
PAL mode.(E-E mode is possible).
Is voltage of 5V applied to the
chroma power terminal pin(61) of
IC201?
YES
YES
NO
Is there chroma signal (approx.156
mVp-p/burst) inputted at pin(46) of
IC201?
YES
NO
Is there chroma signal (approx.197
mVp-p) inputted at pin(58) of
IC201?
NO
Check peripheral circuit pin
(61) of IC201 and PC 5V line.
Check line between pin(60)
and pin(46) of IC201.(C512)
YES
Is CCD control voltate 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 IC 201?
Check whether the pins(73)
and (75) of IC201 oscillate
4.43MHz at PAL/SECAM mode.
Check parts around of X501.
Is there chroma signal(approx.
197mVp-p/burst) outputted at
pin(35) and IC201?
Check line between circuit of
pins (58) and (35) of IC201.
YES
YES
Check line between pins(21)
and (24) of IC201.(C208)
Check line between circuit of
pins(39) and (26) of IC201.
(C212)
Is voltage 5V applied to the CCD section power terminal at pin(36) of IC201?
Is there chroma signal outputted at
pin(55) of IC201?
Is there FM signal (approx.0.3Vp-p)
inputted at pin(78) of IC201?
NO
YES
Check the voltage of pin(4) of
IC501 on playback mode.
LOW
HIGH
Check line between pin(4) of
IC501 and pin(97) of IC701.
Replace IC501.
Is there luminance signal (approx.
0.25Vp-p) inputted at pin(14) of IC201?
Is there luminance signal (approx.0.5
Vp-p) inputted at pin(5) of IC2001?
Is there luminance signal (approx.0.4
Vp-p) inputted at pin(1) of IC2002?
NO
YES
Check peripheral circuit of
pins(13) and (14) of IC201.
NO
YES
Check line between pin(18)
of IC201 and pin(5) of IC2001.
Check line between pin(3) of
IC2001 and pin(1) of IC2002.
Check line between pin(56)
of IC2001 and pin(19) of IC201.
Is there luminance signal (approx.0.4
Vp-p) inputted at pin(1) of IC2001?
Check peripheral circuit of
IC2002.
NO
YES
NO
YES
YES
Is there chroma signal inputted at
pin(9) of IC2006?
YES
Replace IC201.
YES
NO
Check line between pins (55)
of IC201 and pin(9) of IC2601.
Check line between pins (11)
of IC2006 and pin(87) of
IC2401.
Check line between pins (75) of
IC2401 and pin(33) of IC2001.
Check line between pins (26) of
IC2401 and pin(4) of IC2503.
YES
Is there chroma signal inputted at
pin(87) of IC2401?
NO
YES
Is there chroma signal inputted at
pin(33) of IC2401?
NO
YES
Is there chroma signal inputted at
pin(4) of IC2503 and base of
Q2502?
NO
YES
Is there chroma signal outputted
at S terminal and pin(15) of LINE1
SCART socket?
NO
Check peripheral circuit of
IC2503 and Q2502.
YES
Replace C512.
Replace X501.
NO
NO
See FLOR CHART NO.18 E-E MODE TROUBLESHOOTING.
Is there luminance signal (approx.0.5
Vp-p) inputted at pin(23) of IC201?
YES
NO
Is there luminance signal (approx.2.2
Vp-p) outputted at pin(52) of IC201?
YES
NO
Check line between circuit of
pins(24) and (23) of IC201.
(C210)
Replace IC201.
Is there luminance signal inputted at
pin(54) of IC2001?
YES
NO
Check line between pin(52) of
IC201 and pin(54) of IC2001.
Is there luminance signal inputted at
pin(82) of IC2401?
Check line between pin(39) of
IC2001 and pin(82) of IC2401.
Is there luminance signal inputted at
pin(37) of IC2001?
Check line between pin(73) of
IC2401 and pin(37) of IC2001.
Is there luminance signal outputted at
pin(21) of IC2001?
Check peripheral circuit of
IC2001.
YES
NO
YES
NO
YES
NO
NO
46
VC-S2000HM
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
YES
NO
NO
YES
NO
NO
NO
NO
NO
NO
YES
NO
FLOW CHART NO.21 Hi-Fi SOUND MODE TROUBLESHOOTING(1)
Is there audio signal inputted at each input
terminal as shown in table?
L-ch R-ch
Check line ranging from pins(31), (30) of
IC1701(NICAM/IGR), to the each input
terminal of IC2501.
Check line ranging from front audio input
terminal(J2151), to the each input terminal
of IC2501.
Check line ranging from pins(39), (40) of
IC2501(decoder circuit) or audio input
terminal, to the each input terminal of
IC6301.
Is the supply voltage of 5V fed to pins(14),
(30), (36) and 9V fed to pin(60) of IC6301?
Check line between pin(8) of IC6301 and
pin(21) of IC701.
Is there audio signal outputted at pin(11) of
IC201?
Check line between pin(11) of IC201 and
pin(54) of IC6301.
Is there "L" level at pin(8) of IC6301?
Check line between pin(8) of IC6301 and
pin(21) of IC701.
Is there audio signal inputted at pin(54) of
IC6301?
Line output terminal : Is there audio signal outputted at pins(58) and (56) of IC6301?
RF output terminal : Is there audio signal outputted at pin(57) of IC6301?
Line output terminal :
Check line ranging from pins(58) and (56) of IC6301 to pins(2) and (1) of IC2501.
RF output terminal :
Check line ranging from pin(57) of IC6301 to the audio input terminal pin(21) of tuner(TU1401).
Are there the serial data and clock at pins
(31) and(32) of IC6301?
Is there audio signal outputted at pins(4), (46)
of IC6301?
Check line between pins(31), (32) of IC6301
and pins(27), (28) of IC701.
Check line between pins(4, 46) and (5, 45) of
IC6301. (C6302, C6320)
Is there audio signal inputted at pins(5), (45)
of IC6301?
Check PC 5V and PC 9V lines.
<For Hi-Fi mode>
NO
NO
Is there audio signal inputted at each input
terminal of IC201 as shown in table?
U/V tuner audio input terminal.
Normal input terminal.
pin(8)
pin(9)
Check line ranging from A-out pin(21) of
TU1401.
Check line ranging from pin(53) of IC6301.
Replace IC201.
Replace IC6301.
Is there "L" level at pin(99) of IC201?
<For normal audio mode>
No Hi-Fi E-E sound heard.
Decoder signal input
terminal.
IC6301 IC6301
pin(61) pin(52)
Front A/V input terminal.
IC2501 IC2501
pin(11) pin(10)
Tuner input terminal.
IC2501 IC2501
pin(16) pin(15)
47
VC-S2000HM
FLOW CHART NO.23 Hi-Fi SOUND MODE TROUBLESHOOTING(3)
NO Hi-Fi sound playback(E-E mode is possible).
Check peripheral circuit of IC6301 as
shown in table.
Replace IC6301.
YES
NO
YES
Check PC 5V lines.
YES
YES
NO
NO
Is there playback envelope signal out-
putted at pins (19),(18) of IC6301?
Is the supply voltage of 5V fed to pin(20) of
IC6301?
Is there A-H.SW.P. signal at pin(35) of
IC6301?
Check the A-H.SW.P. line between pin(35)
of IC6301 and pin(26) of IC701.
L-ch pins(10),(11),(12),(15),(16)
R-ch pins(41),(40),(39),(38),(37)
FLOW CHART NO.22 Hi-Fi SOUND MODE TROUBLESHOOTING(2)
No Hi-Fi sound recording(E-E mode is possible)
Check peripheral circuit of IC6301 as
shown in table.
Replace IC6301.
Check PC 5V lines.
YES
YES
NO
NO
NO
YES
YES
NO
NO
Is there REC FM signal outputted at the
IC6301 pins (26) to (22)(CH-1)/pins(26)
to (25)(CH-2).
Is the supply voltage of 5V fed to pin(20) of
IC6301?
Check AH-MZ harness.
Is there "L" level at pin(33) of IC6301?
Check or replace the cylinder.
Check the Hi-Fi CTL line between pin(33)
or IC6301 and pin(20) of IC701.
YES
Check the record current setting resistor
R352 at pin(27) of IC6301.
L-ch pins(41),(40),(39),(38),(37)
R-ch pins(10),(11),(12),(15),(16)
FLOW CHART NO.24 LINEAR SOUND MODE TROUBLESHOOTING(1)
No linear sound recording(E-E mode is possible)
Is there "L" level at pin(99) of
IC201?
Check the AUDIO MUTE (H) line between pin
(99) of IC201 and pin(21) of IC701.
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Is there signal at pin(4) of IC201?
Is the supply voltage of 12V fed to
pin(2) of T651?
Check M 12V line.
Is there signal(Bias) at pin(5) of T651?
Check the Bias oscillation circuit(T651,Q651,
Q652) and A-ERASE CTL line.
Is there signal(Bias + Audio sig.) at
pin(6) of T651?
Check peripheral circuits of T651.
Check the MH-AA harness and A/C
head.
Replace IC201.
48
VC-S2000HM
FLOW CHART NO.25 LINEAR SOUND MODE TROUBLESHOOTING (2)
No linear sound playback(E-E mode is possible)
Is there signal at pin(100) of IC201?
Are the MH-AA harness and the PB AMP
peripheral parts normal?
YES
YES
YES
YES
YES
NO
Is there "L" level at pin(99) of IC201?
Check the AUDIO MUTE (H) line between pin
(99) of IC201 and pin(21) of IC701.
YES
NO
Is there audio signal inputted at pin
(54) of IC6301?
Check line between pin(11) of IC201 and pin
(54) of IC6301.
NO
Is there signal at pin(11) of IC201?
Replace IC201.
YES
NO
NO
Clean A/C head.
Readjust azimuth
Is the azimuth hight of A/C head properly
adjusted?
Replace A/C head.
Replace IC201.
YES
YES
NO
NO
NO
NO
YES
FLOW CHART NO.26 NICAM/IGR TROUBLESHOOTING
NO
NO
YES
YES
YES
YES
YES
Is 5V supplied at pins(11),(19),(1) of
IC1701?
Check PC 5V line.
Is 8V supplied at pin(33) of IC1701?
Check the REG. circuit of D9905.
Check PC MOTOR 12V line.
Check peripheral circuit of IC1701.
Replace IC1701.
Check peripheral circuit of X1701.
Is there a NICAM/IGR audio signal
at pins(31), (30) of IC1701?
Is there a NICAM/IGR audio signal
at emitter of Q1705, Q1706?
YES
YES
Check peripheral circuit of TU1401.
Check between SIF OUT of TU1401
and pin(2) of IC1701.
Check serial data and clock at
pin(12) and (13) of IC1701.
Is there oscillated 18.432MHz at
pins(5), (6) of IC1701?
No NICAM/IGR sound.
Is there a base band signal at
pin(2) of IC1701?
Is there a base band signal at SIF
out of TU1401?
Check line between emitter of
Q1705, Q1706 and pins(52), (61)
of IC6301.
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