Denon DN-F650R Service Manual

13
TROUBLE SHOOTING
1. MAIN PWB UNIT
1.1. Reset is not cancelled
Check power supply turning on and the reset timing.
b
+3.3V_CPU and u-com reset : 200ms or more
b

u-com reset[TPF506] > System reset[PRST#]
Check VBUS power supply.
• [TPF135] VBUS : +5V
Check USB multiplexer.
• [IC105] signal line.
Check soldering.
•
[IC404]
•
[IC403]
•
[TR501,TR502] and surrounding circuits.
•
[C584]
Check part.
• VBUS line constant.
• [IC103]
Check part.
• [IC105] and the surrounding constant.
Check operation of Flash ROM.
b
Check whether the Flash ROM address bus and
the data bus operate.
[IC501] : Check power supply and the control signal.
•
+3.3V_CPU (IC 501_37pin)
•
PRST# (IC501_12pin)
•
SHRD#(IC501_28pin)
•
CS0 (IC501_26pin)
b

Replace IC501.
Replace MAIN UNIT.
Replace MAIN UNIT.
Replace MAIN UNIT.
1.2. USB keyboard does not operate
1.3. USB drive does not operate
Check operation of USB_HID.
• [TPF136] VBUS : +5V
Check part.
• [IC104] and the surrounding constant.
b

Replace IC104.
N.G.
N.G.
N.G.
O.K.
O.K.
N.G.
N.G.
O.K.
O.K.
O.K.

Denon DN-F650R Specifications

General

Brand	Denon
Model	DN-F650R
Category	Recording Equipment
Language	English