DOWNLOAD Sharp PG-A20X (serv.man12) Service Manual ↓ Size: 14.88 KB | Pages: 7 in PDF or view online for FREE

Model
PG-A20X (serv.man12)
Pages
7
Size
14.88 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Troubleshooting tables
File
pg-a20x-sm12.pdf
Date
PREV: Sharp PG-A20X (serv.man11) Service Manual

Sharp PG-A20X (serv.man12) Service Manual ▷ View online

35
PG-A20X
YES
YES
NO
YES
YES
NO
YES
YES
NO
Checking the RGB signal
Are their RIN2-RIN9, 
GIN2-GIN9, BIN2-BIN9 
signals inputted into 
IC2601?
Check IC8003 and its 
peripheral circuits.
Are the RGB signals 
outputted from
pin (9), (7) and (4) of 
IC3104? gradation signals?
Check IC3104 and its 
peripheral circuits.
NO
Are their signals inputted 
into pins(37)-(46) of IC1101, 
IC1201 and IC1301?
Check IC2601 and its 
peripheral circuits.
NO
Are there input signals at 
pins (2) and (31) of 
SC1101, SC1201 and 
SC1301?
Check IC1103 and its 
peripheral circuits.
Are there input signals at 
pins (3) of SC1101 and 
SC1301 and pin 
(30) of SC1201?
Check IC1101, IC1201, 
IC1301 and  their 
peripheral circuits.
NO
Check the connection 
of LCD panels.
And when video signal and 
OSD are also not 
disaplayed, replace the 
LCD panels.
Are their signals inputted 
into pins (5)-(10) of 
SC1101, SC1301 and into 
pins (23)-(28) of SC1201?
Check IC1101, IC1201, 
IC1301 and their peripheral 
circuits.
36
PG-A20X
YES
NO
No colour or unusual 
tone(NTSC, PAL)
Are there RGB outputs at 
pins (23)(R-Y), (22)(B-Y) of 
IC3105? 
Check C3126 and C3124. 
Check IC3105 and its 
peripheral circuits.
YES
NO
No or unusual Y signal
Are there RGB outputs at 
pins (21)(Y) of IC3105? 
Check C3121.
Check IC3506 and its 
peripheral circuits. 
YES
NO
Checking IC3102 (RGB 
signal output circuit)
Are there signal outputs at 
pins (66)(R-Y), (68)(B-Y), 
(69)(Y) of IC3102 ? 
Go to "No colour or unusual 
tone", "No Y signal" or "Out 
of sync" 
YES
NO
Are there RGB outputs 
waveforms at pins(35), 
(37) and (39) of IC3102 ? 
Check the data transfer and 
other performance at  pins 
(55) and (56) of IC3102.
NO
Are there output 
waveforms at the emitters 
of Q3110, Q3111 and 
Q3112?
Check Q3110 thru Q3112 
and their peripheral circuits.
37
PG-A20X
NO
YES
NO
NO
NO
YES
NO
NO
YES
NO
NO
NO
Checking the S-video 
Is the specified voltage EA 
connectors?
Check power circuit and its 
parts.
Is the lamp on ?
Go to "Lamp  light-up".
YES
Is the video signal inputted 
into the pins(43) and (44) 
of IC3105?
Check the video terminal 
and its peripheral circuits.
YES
Go to "Checking IC3102"
Checking the video 
Is the specified voltage EA 
connectors?
Check power circuit and its  
peripheral parts.
Is the lamp on ?
Go to "Lamp light-up".
YES
Is the video signal inputted 
into the pin(7) of IC3506?
Check the video terminal 
and its peripheral circuits.
YES
Check IC3105 and its 
peripheral circuits.
Check IC1103 and its 
peripheral circuits.
Is the signal inputted into 
the pins(39) and (41) of 
IC3105?
Check Q3501, Q3502 and 
their peripheral circuits.
YES
Is the video signal 
outputted from the pins(25)
and (27) of IC3506?
Check IC3506 and its 
peripheral circuits.
37
PG-A20X
NO
YES
NO
NO
NO
YES
NO
NO
YES
NO
NO
NO
Checking the S-video 
Is the specified voltage EA 
connectors?
Check power circuit and its 
parts.
Is the lamp on ?
Go to "Lamp  light-up".
YES
Is the video signal inputted 
into the pins(43) and (44) 
of IC3105?
Check the video terminal 
and its peripheral circuits.
YES
Go to "Checking IC3102"
Checking the video 
Is the specified voltage EA 
connectors?
Check power circuit and its  
peripheral parts.
Is the lamp on ?
Go to "Lamp light-up".
YES
Is the video signal inputted 
into the pin(7) of IC3506?
Check the video terminal 
and its peripheral circuits.
YES
Check IC3105 and its 
peripheral circuits.
Check IC1103 and its 
peripheral circuits.
Is the signal inputted into 
the pins(39) and (41) of 
IC3105?
Check Q3501, Q3502 and 
their peripheral circuits.
YES
Is the video signal 
outputted from the pins(25)
and (27) of IC3506?
Check IC3506 and its 
peripheral circuits.
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