Denon avr-s720w, Service Manual

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BD3812F (DIGITAL_ANALOG : IC851)
NJM2595MTE1 (DIGITAL_ANALOG : IC881)
8IGLRMGEP2SXI
6/9
www.rohm.com
2010.06 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
BD3812F
-10
-8
-6
-4
-2
0
2
4
6
8
10
10 100 1000 10000 100000
FREQUENCY (Hz)
0.001
0.01
0.1
1
10
0.001 0.01 0.1 1 10
INPUT VOLTAGE (Vrms)
-5
0
5
10
15
20
10 100 1000 10000 100000
FREQUENCY (Hz)
0.0001
0.001
0.01
0.1
1
10
0.001 0.01 0.1 1 10
INPUT VOLTAGE (Vrms)
-2.5
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
2.5
0 2 4 6 8 10
POWER SUPPLY (V)
Application circuit
UNIT
RESISTOR :
CAPACITOR : F
Fig.2
Reference data
LOGIC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CL
DA
MUTE
SEL
DGND
OUT1
OUT2
10µ
10
V
EE
AGND
V
CC
IN1
IN2
47
47µ
AGND
AGND
Fig.3 Circuit current - Power supply
Fig.4 Voltage gain - Frequency
Fig.5 Output voltage - Input voltage
Fig.6 THD+N - Input voltage
Fig.7 Output gain - Frequency
VCC
VEE
0, 6 18dB
2dB/step
NJM2595
- 1 -
5-INPUT 3-OUTPUT VIDEO SWITCH
■
GENERAL DESCRIPTION
■
PACKAGE OUTLINE
■
FEATURES
●
5-input 3-output
●
Operating Voltage ± 4.0 to ± 6.5V
●
Operating current ± 15mAtyp. at Vcc= ± 5V
●
Crosstalk -65dBtyp.
●
Internal 6dB Amplifier
●
Internal 75 Ω Driver
●
Bipolar Technology
●
Package Outline DIP16,DMP16
■
PIN CONFIGURATION and BLOCK DIAGRAM
13
9
7
5
3
20k
20k
20k
20k
16
10 14 2
1
15
11
8 12 6 4
6dB
Amp
75 Ω
Driver
S3
S2
S4
S1
20k
20k
20k
S5
S6
S7
Vin1
Vin2
Vin3
Vin4
Vin5
SW3 SW4
SW5 SW1 SW2 V
+
GND V
-
Vout3
Vout2
Vout1
6dB
Amp
6dB
Amp
75 Ω
Driver
75 Ω
Driver
The
NJM2595
is a 5-input 3-output video switch. Its switches
select one from five signals received from VTR,TV,DVD,
TV-GAME and others.
The NJM2595 is designed for audio items, such as AV amplifier
and others.
NJM2595D NJM2595M
TOP268VG (SMPS : IC601)
3
Figure 3. Functional Block Diagram.
PI-4511-012810
SHUTDOWN/
AUTO-RESTART
CLOCK
CONTROLLED
TURN-ON
GATE DRIVER
CURRENT LIMIT
COMPARATOR
INTERNAL UV
COMPARATOR
INTERNAL
SUPPLY
5.8 V
4.8 V
SOURCE (S)
SOURCE (S)
S
R
Q
D
MAX
STOP SOFT
START
CONTROL (C)
VOLTAGE
MONITOR (V)
FREQUENCY (F)
-
+ 5.8 V
I
FB
1 V
Z
C
V
C
+
-
+
-
+
-
LEADING
EDGE
BLANKING
÷
16
1
HYSTERETIC
THERMAL
SHUTDOWN
SHUNT REGULATOR/
ERROR AMPLIFIER
+
-
DRAIN (D)
ON/OFF
DC
MAX
DC
MAX
66k/132k
0
OV/
UV
OVP V
VI (LIMIT)
CURRENT
LIMIT
ADJUST
V
BG
+ V
T
LINE
SENSE
SOFT START
OFF
F REDUCTION
F REDUCTION
STOP LOGIC
EXTERNAL CURRENT
LIMIT (X)
OSCILLATOR
WITH JITTER
PWM
K
PS(UPPER)
K
PS(LOWER)
SOFT START
I
FB
I
PS(UPPER)
I
PS(LOWER)
K
PS(UPPER)
K
PS(LOWER)
Pin Functional Description
DRAIN (D) Pin:
High-voltage power MOSFET DRAIN pin. The internal start-up
bias current is drawn from this pin through a switched high-
voltage current source. Internal current limit sense point for
drain current.
CONTROL (C) Pin:
Error amplifier and feedback current input pin for duty cycle
control. Internal shunt regulator connection to provide internal
bias current during normal operation. It is also used as the
connection point for the supply bypass and auto-restart/
compensation capacitor.
EXTERNAL CURRENT LIMIT (X) Pin:
Input pin for external current limit adjustment remote-ON/OFF
and device reset. A connection to SOURCE pin disables all
functions on this pin. This pin should not be left floating.
VOLTAGE MONITOR (V) Pin:
Input for OV, UV, line feed-forward with DC
MAX
reduction, output
overvoltage protection (OVP), remote-ON/OFF. A connection to
the SOURCE pin disables all functions on this pin. This pin should
not be left floating.
FREQUENCY (F) Pin :
Input pin for selecting switching frequency 132 kHz if connected
to SOURCE pin and 66 kHz if connected to CONTROL pin. This
pin should not be left floating.
SOURCE (S) Pin:
Output MOSFET source connection for high-voltage power return.
Primary-side control circuit common and reference point.
NO CONNECTION (NC) Pin:
Internally not connected, floating potential pin.
Figure 4. Pin Configuration (Top View).
12 S
11 S
10 S
9 S
8 S
7 S V 1
X 2
C 3
F 4
D 6
PI-5568-061011
K Package
(eSOP-12B)
Exposed Pad (On Bottom)
Internally Connected to
SOURCE Pin
52
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating