Sharp VC-M314 (serv.man8) Service Manual ▷ View online
49
VC-M314HM
VC-MH834HM
VC-MH834HM
YES
YES
YES
NO
NO
Check line between pins(79) and (78) of IC201.
Is there luminance signal (approx. 200mVp-p)
Check V
-H.SW
.P
. line.
FLOW CHART NO.20 PLA
YBACK MODE TROUBLESHOOTING
Playback picture does not appear
. (E-E mode is possible)
Is the supply V
-H. SW
.P
. signal fed to pin
(81) of IC201?.
Is there luminance signal input output
at pins (13) and (14) of IC201?.
Is there luminance signal (approx. 0.5Vp-p)
input output at pin (19) of IC201?.
Is there luminance signal (approx. 0.3Vp-p)
input output at pins (42) of IC201?.
Is there luminance signal (approx. 0.5Vp-p)
input output at pins (26) of IC201?.
Check peripheral circuit of pins (13) and (14)
of IC201?.
Check line between pins (18) and (19)
of IC201.
Check line between pins (21) and (42)
of IC201. (C208)
Check line between pins (39) and (26)
of IC201. (C212)
Is there luminance signal (approx. 0.5Vp-p)
input output at pin (39) of IC201?.
Is there luminance signal (approx. 0.5Vp-p)
inputted at pins (23) of IC201?.
Is voltage 5V applied to the CCD section power terminal at pin (36) of IC201?.
Although picture playback picture is possible, colour does not appear in P
A
L
mode.(E-E mode is possible)
Is voltage of 5V applied to the chroma power
terminal pin(61) of IC201?
Is there chroma signal (approx. 156mVp-p/
burst) inputted at pin (46) of IC201?.
Is there chroma signal (approx. 197mVp-p/
bust) inputted at pin (58) of IC201?.
YES
YES
YES
Is there luminance signal (approx. 0.5Vp-p)
outputted at pins (52) of IC201?.
Check line between circuit of pins (24)and(23)
of IC201. (C210).
See FLOW CHAR
T
NO.18 E-E MODE
TROUBLESHOOTING..
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Replace IC201.
NO
Check peripherial circuit pin (61) of IC201 and
PC 5V line
Check line between pin (60)and pin (46)
of IC201.(C512).
NO
Check whether the pins (73) and (75)of IC201
oscillate 4.43MHz at P
AL/SECAM mode.
Check parts around of X501.
Check line between circuit of pins (58)and
(35) of IC201.
Is there chroma signal (approx. 197mVp-p/
burst) outputted at pin (35) of IC201?.
Is there chroma signal (approx. 300mVp-p)
outputted at pin (55) of IC201?.
Is there chroma signal (approx. 300mVp-p/
bust) inputted at pin (54) of IC201?.
Check line between circuit of pins (55)and
(54) of IC201.
Replace IC201
YES
NO
YES
YES
YES
YES
YES
YES
YES
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?
NO
Is there FM signal (approx. 200mVp-p)
inputted at pin(78) of IC201?
outputted at pin(78) of IC201?
50
VC-M314HM
VC-MH834HM
VC-MH834HM
YES
YES
YES
NO
NO
Check line between pins(79) and (78) of IC201.
Is there luminance signal (approx. 200mVp-p)
Check V
-H.SW
.P
. line.
FLOW CHART NO.20 PLA
YBACK MODE TROUBLESHOOTING
Playback picture does not appear
. (E-E mode is possible)
Is the supply V
-H. SW
.P
. signal fed to pin
(81) of IC201?.
Is there luminance signal input output
at pins (13) and (14) of IC201?.
Is there luminance signal (approx. 0.5Vp-p)
input output at pin (19) of IC201?.
Is there luminance signal (approx. 0.3Vp-p)
input output at pins (42) of IC201?.
Is there luminance signal (approx. 0.5Vp-p)
input output at pins (26) of IC201?.
Check peripheral circuit of pins (13) and (14)
of IC201?.
Check line between pins (18) and (19)
of IC201.
Check line between pins (21) and (42)
of IC201. (C208)
Check line between pins (39) and (26)
of IC201. (C212)
Is there luminance signal (approx. 0.5Vp-p)
input output at pin (39) of IC201?.
Is there luminance signal (approx. 0.5Vp-p)
inputted at pins (23) of IC201?.
Is voltage 5V applied to the CCD section power terminal at pin (36) of IC201?.
Although picture playback picture is possible, colour does not appear in P
A
L
mode.(E-E mode is possible)
Is voltage of 5V applied to the chroma power
terminal pin(61) of IC201?
Is there chroma signal (approx. 156mVp-p/
burst) inputted at pin (46) of IC201?.
Is there chroma signal (approx. 197mVp-p/
bust) inputted at pin (58) of IC201?.
YES
YES
YES
Is there luminance signal (approx. 0.5Vp-p)
outputted at pins (52) of IC201?.
Check line between circuit of pins (24)and(23)
of IC201. (C210).
See FLOW CHAR
T
NO.18 E-E MODE
TROUBLESHOOTING..
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Replace IC201.
NO
Check peripherial circuit pin (61) of IC201 and
PC 5V line
Check line between pin (60)and pin (46)
of IC201.(C512).
NO
Check whether the pins (73) and (75)of IC201
oscillate 4.43MHz at P
AL/SECAM mode.
Check parts around of X501.
Check line between circuit of pins (58)and
(35) of IC201.
Is there chroma signal (approx. 197mVp-p/
burst) outputted at pin (35) of IC201?.
Is there chroma signal (approx. 300mVp-p)
outputted at pin (55) of IC201?.
Is there chroma signal (approx. 300mVp-p/
bust) inputted at pin (54) of IC201?.
Check line between circuit of pins (55)and
(54) of IC201.
Replace IC201
YES
NO
YES
YES
YES
YES
YES
YES
YES
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?
NO
Is there FM signal (approx. 200mVp-p)
inputted at pin(78) of IC201?
outputted at pin(78) of IC201?
51
VC-M314HM
VC-MH834HM
VC-MH834HM
YES
YES
NO
NO
FLOW CHART NO.21 Hi-Fi SOUND MODE TROUBLESHOOTING(1) (For Hi-Fi model)
Check line ranging from pins (31),(30) of
IC1701 (NICAM/GR), to the each input
terminal of IC2501.
Check PC 5V and Hi-Fi 9V lines.
Is the supply voltage of PC 5V fed to pins(14),
(30),(36) and 9V fed to pin (60) of IC6301?
No Hi-Fi E-E sound heard
Is there audio signal inputted at each input
terminal as shown in table?
T
uner input terminal.
IC2501 IC2501
pin(16) pin(15)
Decoder signal input
terminal.
Check line ranging from pins (39),(40) of
IC2501 (decoder circuit) or audio input
terminal to the each input
terminal of IC6301.
Are there the serial data and clock at pins
(31) and (32) of IC6301?
Check line between pins (31),(32) of IC6301
and pins (26),(27) of IC701?
Check line between pins (4,46)and (5,45) of
IC6301. (C6302,C6320)
Is there audio signal outputted at pins (4),
(46) of IC6301?
Is there audio signal outputted at pins (5),
(45) of IC6301?
YES
NO
NO
Is there audio signal inputted at each input
terminal of IC201 as shown in table?
U/V tuner audio input terminal. pin(8)
Aux input terminal pin(9)
Is there audio signal outputted at pins (1
1),
of IC201?
Is there audio signal outputted at pin (54)
of IC6301?
NO
NO
NO
NO
NO
Check line ranging from
A-out pin (21),of
TU1401
Check line ranging from pin (53) of IC6301.
Line output terminal : Is there audio signal outputted at pins (58) and (56) of IC6301?
Replace IC201.
Is there "L" level at pin(99) of IC201?.
Check line between pin (8) of IC6301 and
pin (21) of IC701.
Check line between pin (1
1) of IC201 and
pin (54) of IC6301
YES
NO
Is there "L" level at pin(8) of IC6301?.
Check line between pin (8) of IC6301 and
pin (21) of IC701
Replace IC6301.
YES
YES
YES
YES
YES
NO
NO
Line output terminal
Check line ranging from pins (58) and (56) of IC6301 to pins (2) and (1) of IC2501.
<For Hi-Fi mode>
<For normal mode>
IC6301 IC6301
pin(61) pin(52)
52
VC-M314HM
VC-MH834HM
VC-MH834HM
YES
YES
NO
NO
FLOW CHART NO.22 Hi-Fi SOUND MODE TROUBLESHOOTING(2) (For Hi-Fi model)
NO
YES
Replace IC6301.
Is there a REC FM signal outputted
at the IC6301 pins(26) to (22) (CH-1)
/pins (26) to (25)(CH-2).
Check PC 5V lines.
Check the record current setting
resistor R352 and pin (27) of IC6301.
YES
No HI-FI sound recording(E-E mode is posible).
Check peripheral circuit of IC6301 as
shown in table.
L-ch pins (41),(40),(39),(38),(37)
R-ch pins (10),(1
1),(12),(15),(16)
Check AH-MZ
harness.
Check or replace the cylinder
.
Is the supply voltage of 5V fed to pin
(20) of IC6301?
Is there "L" level at pin (33) of IC6301?
NO
NO
YES
NO
FLOW CHART NO.23 Hi-Fi SOUND MODE TROUBLESHOOTING(3) (For Hi-Fi model)
NO
YES
Replace IC6301.
Is there playback envelope signal out
putted at pins(19) to (18) of IC6301?
Check PC 5V lines.
Is there
A-H.SW
.P
. signal at
pin (35) of IC6301?
YES
No HI-FI sound playback(E-E mode is possible).
Check peripheral circuit of IC6301 as
shown in table.
L-ch pins (41),(40),(39),(38),(37)
R-ch pins (10),(1
1),(12),(15),(16)
Is the supply voltage of 5V fed to pin
(20) of IC6301?
NO
Check the
A-H.SW
.P
. line between
pin (35) of IC6301 and pin (28) of IC701
Replace IC 6301
Is there audio signal inputted at input
terminal as shown in table?
Decoder or aux signal input terminal.
Pin (9) of IC201
Front
A/V signal input terminal.
Pin (1
1) of IC2501 (DECODER) or Front
A/V
signal input terminal pin(7) of IC201.
Is there audio signal outputted at pin (1
1)
of IC201? (DECODER)
Does the trap circuit operate normally?
NO
NO
NO
Check line ranging from pin (39) of IC2501
(DECODER) or from SCAR
T
input terminal.
Check line ranging from Front
A/V input
terminal (J2101).
Line output terminal : Is there audio signal
inputted at pins (2) of IC2501?
Check PC 5V lines.
Is there "L" level at pin(99) of IC201?
Check
AUDIO MUTE (H) line between pin
(99) of IC201 and pin (21) of IC701.
Check line between IC2501 peripheral and
output terminal peripheral.
Check the trap circuit. (Q601,Q602).
YES
YES
YES
YES
YES
No E-E sound
FLOW CHART NO.24 LINEAR SOUND MODE TROUBLESHOOTING(1) (For MONO model)
Is there audio signal outputted at pins (42),
and (30) of IC2501?
Is the supply voltage of 5V fed to pin (96)
of IC201?
YES
NO
NO
Check peripheral circuit.of IC2501.
YES
NO
YES
YES
T
o
Output
T
erminal
NO
Check line between Q601, Q602 of
IC 201 and
Audio Output
T
erminal.
For Single SCART MONO
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