Read Sharp DV-NC55 (serv.man10) Service Manual online
53
DV-NC55S/H
DV-NC60H
DV-NC60H
FLOW CHART NO.18 Hi-Fi SOUND MODE TROUBLESHOOTING(2) (For Hi-Fi model)
NO
NO
NO
NO
YES
YES
YES
NO
Check peripheral circuit of IC6301 as shown in table.
L-ch pins (41),(40),(39),(38),(37)
R-ch pins (10),(11),(12),(15),(16)
Check peripheral circuit of IC6301 as shown in table.
L-ch pins (41),(40),(39),(38),(37)
R-ch pins (10),(11),(12),(15),(16)
Is there a REC FM signal outputted at the IC6301
pins(26) to (22) (CH-1)/pins (26) to (25) (CH-2).
Check AH-MZ harness.
YES
Check or replace the cylinder.
Replace IC6301.
Check PC 5V lines.
Is the supply voltage of 5V fed to pin (20) of IC6301?
Is there "L" level at pin (33) of IC6301?
Check the record current setting resistor R352 and
pin (27) of IC6301.
No Hi-Fi sound recording (E-E mode is posible).
FLOW CHART NO.19 Hi-Fi SOUND MODE TROUBLESHOOTING(3) (For Hi-Fi model)
NO
YES
NO
YES
YES
Is there playback envelope signal outputted at pins
(19) to(18) of IC6301?
Replace IC6301.
Check PC 5V lines.
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 (28) of IC701.
YES
No Hi-Fi sound playback(E-E mode is possible).
NO
YES
NO
YES
NO
FLOW CHART NO.20 LINEAR SOUND MODE TROUBLESHOOTING(1) (For MONO model)
NO
YES
NO
YES
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 (11) of IC2501 (DECODER) or Front A/V signal
input terminal pin (7) of IC201.
Is there audio signal outputted at pin (11) of
IC201? (DECODER)
Is there "L" level at pin (99) of IC201?
Check PC 5V lines.
Check line ranging from pin (39) of IC2501
(DECODER) or from SCART 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?
Is there audio signal outputted at pins (42), and
(30) of IC2501?
Check line between IC2501 peripheral and
output terminal peripheral.
Is the supply voltage of 5V fed to pin (96) of
IC201?
Check AUDIO MUTE (H) line between pin (99) of
IC201 and pin (21) of IC701.
Check line between Q601, Q602 of IC201 and
Audio Output terminal.
YES
YES
YES
NO
NO
Does the trap circuit operate normally?
Check the trap circuit. (Q601, Q602).
To Output Terminal
Check peripheral circuit of IC2501.
YES
NO
No E-E sound
For Single SCART MONO
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