Denon DVD-757 User Manual

16
DVD-1930CI / DVD-757
TROUBLESHOOTING
FLOW CHART NO.2
The fuse blows out.
After servicing, replace the fuse.
Check the presence that the primary component
is leaking or shorted and service it if defective.
Check the presence that the rectifying diode or
circuit is shorted in each rectifying circuit of
secondary side, and service it if defective.
FLOW CHART NO.3
When the output voltage fluctuates.
Ye s
No
FLOW CHART NO.4
When buzz sound can be heard in the vicinity of power circuit.
Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary
side, and service it if defective. (D1003, D1006, D1008, D1016, D1030, IC1002, Q1002, Q1004, Q1005, Q1011,
Q1014)
Does the photo coupler circuit on the secondary
side operate normally?
Check IC1001, D1012, D1024 and their periphery,
and service it if defective.
Check IC1001, IC1006 and their
periphery, and service it if defective.
FLOW CHART NO.5
-FL is not outputted.
Is approximately -23V voltage supplied to the
anode of D1003?
Check D1003 and periphery circuit, and service it
if defective.
Check if there is any leak or short-circuit
on the loaded circuit, and service it if defective.
Ye s
No
FLOW CHART NO.1
The power cannot be turned on.
Is the fuse normal?
Is normal state restored when once unplugged
power cord is plugged again after several seconds?
Is the EV +3.3V line voltage normal?
See FLOW CHART No.2 <The fuse blows out.>
Check if there is any leak or short-circuiting on the
primary circuit component, and service it if defective.
(Q1001, Q1003, Q1008, T1001, D1001, D1002,
D1004, D1005, D1011, C1003, C1005)
Check each rectifying circuit of the secondary circuit
and service it if defective.
Ye s
Ye s
Ye s
No
No
No
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Denon DVD-757 Specifications

Audio Specifications

frequency response (DVD)	4 Hz - 22 kHz (48kHz sampling), 4 Hz - 44 kHz (96kHz sampling), 4 Hz - 88 kHz (192kHz sampling)
frequency response (CD)	4 Hz - 20 kHz
frequency response (Super Audio CD)	4 Hz - 100 kHz
signal-to-noise ratio	115 dB
dynamic range (DVD)	100 dB
dynamic range (CD)	98 dB
total harmonic distortion	0.004% at 1 kHz CD

Video Specifications

signal system	NTSC
composite video output	1.0 Vp-p (with 75 ohms load)
S-Video output (Y)	1.0 Vp-p (with 75 ohms load)
S-Video output (C)	0.286 Vp-p
component video output (Y)	1.0 Vp-p (with 75 ohms load)
component video output (Pb/Cb)	0.648 Vp-p (with 75 ohms load)
component video output (Pr/Cr)	0.648 Vp-p (with 75 ohms load)

Power

power supply	AC 120 V, 60 Hz
power consumption	15 W
standby power consumption	1 W

Weight and Dimensions

dimensions	435 (W) x 75 (H) x 310 (D) mm, 17-3/32” (W) x 2-61/64” (H) x 12-13/64” (D)
weight	2.6 kg, 5.72 lbs