Sanyo Xp 55 Manual

-41-
■Chassis Block Diagrams
IC201
RGB-SW
IC1202
MON. SWIC8001
DV I
RECEIVERIC3211,12,13
BUFFER
IC9501
CAPTURE
IC9401
AI PICTURE,
COLOR
MANAGEMENT
R-LCD PANEL  G-LCD PANEL B-LCD PANEL
DVI-D
INPUT-1
ANALOG INPUTINPUT-2
INPUT-3 NETWORK
ORGANIZER
IC231
A/D
IC211
CLAMP
IC4541
BUFFER
IC3214BUFFERIC3251BUFFERIC3224BUFFERIC4281BUFFER
IC1101
3D-Y/C
IC2101
3L-Y/C
IC1651
PRE-AMP.
IC1141
NT/PAL-SW
IC1141
NT/PAL-SW
IC4104
CSYNC SW
IC3101
VIDEO
DECODER
IC4531
YUV SWIC4501
SHARPNESSIC2311
A/D
IC2341
CLAMP
IC4231
VCO...

-42-
RGB(DIGITAL)
 INPUT
DV I - D
RGB(ANALOG)
IN/OUT
G/Y/VIDEO
B/CB/PB
R/CR/PR
H/V
V
Y/VIDEO
CB/PB
CR/PR
S-VIDEO
D-SUB
INPUT 2 (BNC)
INPUT 1
DIGITAL (DVI-D)
ANALOG (D-SUB15)
INPUT 3 (RCA)
INPUT 3 (DIN)
IC1201RGB SW.

IC1202RGB SW.

IC5301SW.

IC5302SYNC SW.

IC5304SYNC SEP.

IC5312AMP.
IC4101SELECTOR

IC4102NOR

IC4104CSYNC SW.

DIGITAL RGB
AV SEL0/1
2,4
CG1/CG2
S_SW IN
S_IN Yes : L
S_IN No : HINPUT 1 : L
INPUT 2 : H MONITOR OUT ON : L
MONITOR OUT OFF : H
22
M OUT
1
PC_R/G/B CG_R/G/B
SCART G_SYNC
PC2_H/V...

-43-
Chassis Block Diagrams
IC301
SCAN
CONVERTER
I/F BOARD
NETWORK ORGANIZERIC201
RGB-SW

IC211CLAMP

IC212DAC

IC3214BUFFER
IC3251BUFFER
IC3224BUFFER

IC8001
DVI-RECEIVER
 IC3211
BUFFERIC3212BUFFERIC3213BUFFERIC4251BUFFER
IC4503
SW IC4261
BUFFERIC4271BUFFER
IC141
IC1101NT 3D-Y/C SEP.
IC2101PA L  3L-Y/C SEP.

IC1141NT/PAL-SW

IC1141NT/PAL-SW

IC3101
VIDEO DECODER
IC2311
A/D
 IC4201
IP CONVERTER

IC6301, IC6302,IC6303,IC6304
SGRAM
 IC4281
BUFFER

CG OUT
PC Analog : L
PJ Net : H
DIGITAL TMDS  DATA
CG_RGB...

-44-
IC301
SCAN
CONVERTER IC9401
AI PICTURE,
COLOR MANAGEMENT

IC9402
SDRAM

IC1501
R-LCD DRIVER
IC501
R-LCD DRIVER

IC2501
PSIG
BUFFER

IC2531
PSIG
BUFFER
R-LCD
PANEL
G-LCD
PANEL
B-LCD
PANEL
IC341
S-RAM
IC9501
CAPTURE

IC351
FLASH
ROM
IC304
CONTROL
MEMORY

SCL5/SDA5
SCLK3/SDATA3/ENB3
RD/WRL/CS
PW_RXD/TXDRD/WRL/WRH/CS
TP501
TP503TP533
TP308TP307
K25B K25G K25R
DR
DG
DBBAOUT
GAOUT
BAOUT SDIF
3236624
24
3,4,5 67 23
6096
62 DHS
DV S
244
A0-A16
D0-D15
A1-A19
D0-D15
PW_SDA
PW_SCLDRSH
R
+TP531
DGSH
G
+TP561...

-45-
Chassis Block Diagrams
PORT
OUT
MOTOR
CONTROL
IC801
CPU
READYLAMP_REPRC1_SW
R/C1
RC2_SW
SCL3 SDA3SCL6 SDA6
SCL5 SDA5SCL5 SDA5
SCL_AD SDA_AD
OPT1OPT2R_C
R/C
JACKUSBCONTROL
PORTKEY
SWITTCHLEDR/C
RECEIVER
Q1851
Q1852
IC1851
LED-On: L
RC1: L
RC2: L
FRONT RC BOARD I/F BOARDNETWORK
ORGANIZER
CONTROL BOARDAV  BOARD
SENSOR
BOARD POWER
BOARD SUB POWER
BOARDM DRIVE BOARD MAIN BOARD
IC1801I/O EXPANDER
IC5801,IC5831,
IC5861,IC5881
BUFFER
OPTION
RESISTORS
K10AK30R
K10B
K8U
5
3
62 1,7 2661
WA RNING
59 11
9
60
25...

-46-
■Power Supply Lines
CPU
D0-7
IC801
CPU
LAMP_DETFA N_SW
FAN_DRIVE
IC_RESET
PFC_SW
P_FAILP_FAIL
P_FAIL
FAN_DRIVE
FAN_CONT1
FAN_CONT2
TXD RXD
FAN_CONT2FAN_CONT1
FAN_CONT1
FAN_CONT2
FA N_CONT1FA N_DRIVEFA N_CONT2
LAMP_SWIC5801,5831,
IC5861,5881
P-FAIL
BUFFERQ4807
IC4891
SCL2SDA2
2
1
5VA
5VD
15.5V
3.3V
S-5V
15VP
9V
S5V
S6V
D4815 D4816 D4817
10VA15.7V
15.7V9VA3.3V_N5VD_N
16V
10VA
S-5VS6V
2.5V12.5V_IP
IC1451 D1451
1.8V
IC1431 D1431
D8033
2.5V_YC
IC2351
IC6616Q6627
IC1161D1103
3.3V_AD1
IC234D234...

-47-
No Power
- When all the LED indicators are not lighting,the symptom indicates that the primary power supply circuit
does not operate properly. Check the power primary circuit and parts as follow;
AC cord
F601 (Fuse)
Line filter board
SW905 (Thermal sw.) ......short in normal
SW905 opens when the surrounding temperature of the switch exceeds 90°C.
SW902 (Interlock sw.) ......short in normal
Check the lamp cover is fixed firmly. The projector cannot turn on with lamp cover removal.
Overload or...

-48-
Reset switch
The microprocessor inside the projector may occasionally
malfunction and does not allow any controls. In this case,
press the reset switch on the rear panel with a sharp tool to
restart the projector.
- When the WARNING TEMP indicator (red) is flashing,the symptom indicates that the projector detected an
abnormal temperature risen inside the projector. Check the air filters and remove the object near the intake and
exhaust fan openings, and wait until the WARNING TEMP indicator flashing...

-49-
Troubleshooting
No Picture
The possible causes of No Picture are listed below. Please
check following and refer to video signal processing dia-
grams in the figure.
1. No picture from Video source
Composite Video  Input
Check composite video signal at pins 3 (Input 2) and 5
(Input 3) of IC4104.
Check AV SEL0/1 switching signals at pins 2 and 4 of
IC4104.  (refer to the block diagram)  
Check composite video signal at pins 45 and 46 of K30R
on AV Board and K10C on Main Board.
Check Y, C signals at...

-50-
Troubleshooting
No Sound
1. No audio signals at AV input circuit.
Check audio signals at pins 1, 12 (CG1), 5, 14 (CG2) and
2, 15 (VIDEO) of IC5001 on AV Board. Check IC5001 and
peripheral circuits.
2.Incorrect operation of Input mode switching.
Check AUDIO_SW1/AUDIO_SW2 switching signals at pins
9 and 10 of IC5001. The AUDIO_SW1/AUDIO_SW2 sig-
nals are output from pins 4 and 5 of IC1801. See the truth
table below for input mode selection.
3. No audio output signal at speakers.
Check audio signals at...