Sharp DV-NC55S Service Manual page 49

FLOW CHART NO.18 Hi-Fi SOUND MODE TROUBLESHOOTING(2) (For Hi-Fi model)
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),(11),(12),(15),(16)
YES
Is there a REC FM signal outputted at the IC6301
pins(26) to (22) (CH-1)/pins (26) to (25) (CH-2).
YES
Check AH-MZ harness.
YES
Check or replace the cylinder.
FLOW CHART NO.19 Hi-Fi SOUND MODE TROUBLESHOOTING(3) (For Hi-Fi model)
No Hi-Fi sound playback(E-E mode is possible).
Is there playback envelope signal outputted at pins
(19) to(18) of IC6301?
YES
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)
YES
Replace IC6301.
NO
Replace IC6301.
Check PC 5V lines.
NO
NO
Is the supply voltage of 5V fed to pin (20) of IC6301?
YES
Is there "L" level at pin (33) of IC6301?
NO
Check the record current setting resistor R352 and
pin (27) of IC6301.
Check PC 5V lines.
NO
NO
Is the supply voltage of 5V fed to pin (20) of IC6301?
YES
YES
Is there A-H.SW.P. signal at pin (35) of IC6301?
NO
Check the A-H.SW.P. line between pin (35) of
IC6301 and pin (28) of IC701.
FLOW CHART NO.20 LINEAR SOUND MODE TROUBLESHOOTING(1) (For MONO model)
No E-E sound
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.
YES
Is there audio signal outputted at pin (11) of
IC201? (DECODER)
NO
YES
Does the trap circuit operate normally?
YES
Line output terminal : Is there audio signal
inputted at pins (2) of IC2501?
YES
Is there audio signal outputted at pins (42), and
(30) of IC2501?
YES
Check line between IC2501 peripheral and
output terminal peripheral.
Check line ranging from pin (39) of IC2501
NO
(DECODER) or from SCART input terminal.
NO
Check line ranging from Front A/V input
terminal (J2101).
Check PC 5V lines.
NO
NO
Is the supply voltage of 5V fed to pin (96) of
IC201?
YES
Is there "L" level at pin (99) of IC201?
YES
Check AUDIO MUTE (H) line between pin (99) of
IC201 and pin (21) of IC701.
NO
Check the trap circuit. (Q601, Q602).
YES
To Output Terminal
NO
Check line between Q601, Q602 of IC201 and
Audio Output terminal.
For Single SCART MONO
NO
Check peripheral circuit of IC2501.