Service Mode - Sanyo HT-F450 Service Manual

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
.,
.-.
,,"
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.
..
-3-