Service Manual
AV Surround Processor
Contents
IFILE No.
I
tiT-F450 (AU)
Specifications ................................................................... 1
IC Block Diagram & Description ....................................... 8
.:.
Removal and Installation .................................................. 1
Block Diagram
.................................................................. 11
System Connection ..............................~...........................2
Schematic Diagram (Main Amplifier) ............................... 12
Service Mode ................................................................... 3
Wiring Diagram (Main Amplifier) ...................................... 14
Exploded View (Cabinet & Chassis) ................................ 4
Schematic Diagram (Front) .............................................. 16
Parts List ..........................................................................5
Wiring Diagram (Front) ..................................................... 17
“” This service manual consists of “HT-F450U” (Main unit), “RB-HT47°
(Remote control),
“SX-CE450” and “SX-SR450” (Speaker system).
REFERENCE No. SM580786
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)
SPECIFICATIONS
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Output power:
Oenter amplifien 15 Watts (at 4 ohms, 10
0/0 distortion)
Surround Amplifiec 15 Watts x 2 (at 4 ohms, 107. distortion)
Inputs
AV1 lN/AV2 lN/AV3 IN ‘AUDIO” .........300 mV/47k ohms
AVI INIAV2 lN/AV3 INUVIDEO” ........... 1 Vp-p / 75 ohms
LINE IN “AUDIO” ................................. 300 mV/ 47k ohms
outputs
AV2 OUT “AUDIO” .............................. 300 mV 147k ohms
PROCESSOR OUT “AUDIO” ..............1 V/ lk ohm
AV2 OUT MONITOR OUT “VIDEO” .... 1 Vp-p / 75 ohms
CENTERBURROUND SPEAKERS ...4 ohms
Power requirements ...................... AC 230- 240V, 50 Hz
Power consumption ...................... 60 Watts
Dimensions (W x H x D) ................270 x 80 x 330mm
Weight
...........................................
3.8 kg
Specifications subject to change without notice.
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Speaker systems
Center speaker (SX-CE450)
Unit Used
Full range ................................. 10 cm cone type
Maximum music power
handling capacity
........................... 30 Watts (peak)
Nominal impedance
....................... 4 ohms
Dimensions (W x H x D) ................. 270x 130x 145mm
Weight
............................................ 1 kg
Surround speakers (SX-SR450)
Unit Used
Full range
................................. 10 cm cone type
handling capacity
........................... 30 Watts (peak)
Nominal impedance
.......................40hms
Dimensions (W x H x D) .................180 x 130 x 130mm
Weight (per speaker)
..................... 0.7 kg (per speaker)
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“Dolb~, the double-D symbol ❑ a and “PRO LOGIC” are trademark of Dolby Laboratories Licensing Corporation. Dolby Noise
Reduction system is manufactured under license from Dolby
. ._
Laboratories Licensing Corpora~ion.
REMOVAL AND INSTALLATION
● Disconnect the power cord’s plug from the electrical outlet.
● All wiring should be returned to the original position after work is completed.
● First ha~e ready many the new FIXERS (614 129 4971) for replacement.
● Arrange the lead wires so that they are not near the heat sink.
WIRING “LAYOUT ---
FIXER
./—
u u
u
I 1
-1-
..’. :
,.
,’
SYSTEM CONNECTION
Center and Surround Speaker Connections
SX-CE450
SX-SR450
Center speaker
SX-SR450
Rightsurround
Left
surround
speaker
speaker
L
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SERVICE MODE
‘o enter the key service mode, first simultaneously press the SOURCE and SURROUND MODE buttons. This accesses the service
node entry state. As the service mode entry state is discontinued after 1 second elapses, the unit will enter a service mode only if the
lext key is pressed within 1 second.
1. Checking the key input signal connections
● To enter this mode, press MASTER VOL UP button during the service mode entry state.
● When the unit enters this mode, 3 CENTER MODE LEDs and all of the VOLUME LEDs light.
● In this mode, each time one of the keys listed below is pressed, only the LED corresponding to a pressed key lights.
● To release this mode, press the POWER button on the unit or remote control.
I BUITON I
DISPLAY I
CENTER UP SURROUND 1
CENTER DOWN 3-CH LOGIC
SURROUND UP
Standby
SURROUND DOWN
SURROUND 2
SURROUND MODE
LD (AV3)
CENTER MODE
VIDEO (AV2)
SOURCE
TV (AV1 )
MASTER VOL UP
DOLBY PRO LOGIC
MASTER VOL DOWN LINE
TABLE 1: Corresponding buttons and displays in the button checking mode
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2.
Checking the connection of the connectors
To
enter the port connection service mode, connect the 14.7 kohms resistor to the pin 38 and ground to earth, then’ restart. The
NORMAL and WIDE LEDs light. If failed, the indications listed below are displayed on the VOLUME LEDs section. If the pott connection
service mode is OK (all of the VOLUME LEDS lights), the unit enters the key service mode by pressing the POWER button on the
remote control. The 14.7 kohms resistor must be disconnected until pressing the POWER button on the remote control.
To release this mode; turn the power off.
PIN
PORT NAME Uo DIODE
RESISTOR
DISPLAY
REMARKS
62
P12 A.MUTE OUT A
00101
63 P13
F_MUTE
OUT
A
01001
54
PEO PWR_lN IN
00001
Reverse input
45
PA7 PWR_RY OUT
A
00110
60 Plo
C_MUTE
OUT A
01010
61
Pll
S_MUTE
OUT A
01101
50
PB4 SUR_CE IN
D
00010
46
PBO FC OUT A
00111
53 PB7 CLK OUT A
01011
47
PB 1 FB IN
D
00011
52 PB6 DATA
OUT A
01000
48
PB2
FA OUT A
11000
51
PB5
VOL_CE IN
D
00100
All
are OK
00000
The indication “A” in the DIODE section means that the output pori side is the anode side.
The indication “D” in the RESISTOR section, means that the pull down resistor is used.
TABLE 2: Checking of the connection of connectors
NOTE: Example display when failing to enter the port connection service mode
As the most lower LED of the VOLUME LEDs is assigned to bit O,the next lower LED is assigned to bit 1, the third lower LED
is.<ssigned to bit 2 and the fourth lower LED is assigned to bit 3, the corresponding numeral is displayed.
~4DlSPLAY NO.
VOLUME LEDS SECTION
00001
Only the most lower LED lights.
00101
The most lower LED and the third lower LED light.
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