Read Sharp VC-MH834 (serv.man3) Service Manual online
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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