Denon AVR-X250BT Service Manual

Terminal Functions
TC74VHC157FT (DIGITAL : IC745)
TPS563200 (DIGITAL : IC751 - IC753)
Terminal Functions
PIN
DESCRIPTION
NAME NUMBER
GND 1
Ground pin Source terminal of low-side power NFET as well as the ground ter-
minal for controller circuit. Connect sensitive VFB to this GND at a single point.
SW 2 Switch node connection between high-side NFET and low-side NFET.
VIN 3 Input voltage supply pin. The drain terminal of high-side power NFET.
VFB 4
Converter feedback input. Connect to output voltage with feedback resistor
divider.
EN 5 Enable input control. Active high and must be pulled up to enable the device.
VBST 6
Supply input for the high-side NFET gate drive circuit. Connect a 0.1 μ F ca-
pacitor between VBST and SW pins.
Block diagram
TC74VHC157F/FN/FT/FK
2007-10-01
2
Pin Assignment IEC Logic Symbol
Truth Table
Inputs
ST SELECT A B
Output
H X X X L
L L L X L
L L H X H
L H X L L
L H X H H
X: Don’t care
(1)
(15)
(2)
(5)
(3)
1A
2A
1B
(6)
(10)
3A
2B
(4)
(9)
1Y
3Y
(7)
(12)
2Y
4Y
EN
SELECT
ST
3B
(14)
(13)
4A
4B
G1
(11)
1 MUX
1
4A
V
CC
16
4B
15
14
13
12
11
10
1
2
3
4
5
6
7
1Y
2A
2B
2Y
GND
4Y
8
3Y
9
3A
3B
(top view)
1A
1B
SELECT
ST
A
S G
B A
Y B
A
Y
B A
Y BY
SW
VBST
VFB
GND
2
3
1
EN
4
6
5
VIN
TPS562200, TPS563200
DDC (SOT) Package
Top View
2 SW
ZC
XCON
PWM
Control Logic
+
+
+
UVP
OVP
3 VIN
Ton
One-Shot
6
VBST
+
4
VFB
OCL
+
+
Soft Start
5EN
HS
LS
1 GND
SS
Voltage
Reference
Ref
Hiccup
V
UVP
V
OVP
OCL
threshold
Regulator
UVLO
VREG5
VREG5
TSD
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
42

Denon AVR-X250BT Specifications

General

Impedance	16 Ω
Receiver type	Surround
Frequency range	10 - 100000 Hz
Pre-out connectivity	Yes
Audio output channels	5.1 channels
Signal-to-Noise Ratio (SNR)	98 dB
Total Harmonic Distortion (THD)	1 %
Power output per channel (1KHz@6 Ohm)	90 W
Power output per channel (1KHz@8 Ohm)	70 W
Power output per channel (20-20KHz@8 Ohm)	130 W
AirPlay	No
Display	VFD
HDCP version	2.2
Product color	Black
Audio decoders	DTS-HD, DTS-HD Master Audio, Dolby Pro Logic II, Dolby TrueHD
HDMI in	5
Composite video in	2
Digital audio coaxial in	-
Supported graphics resolutions	3840 x 2160
AM band range	522 - 1611 kHz
FM band range	87.5 - 108 MHz
Supported radio bands	AM, FM
AC input voltage	230 V
AC input frequency	50 Hz
Power consumption (standby)	0.5 W
Power consumption (typical)	330 W
Number of HDMI outputs	1
Connectivity technology	Wired & Wireless
Speakers connectivity type	Clamp terminals

Weight and Dimensions

Depth	319 mm
Width	434 mm
Height	151 mm
Weight	7500 g