3-10
3) SYSTEM PART
No
Yes
No
Yes
No
Yes
Yes
No
Yes
Yes
No
When the screen is not
displayed after the power
is turned on
Check with the terminal after
connecting the test cable to
the port for a service
Test each section at Debug mode.
Operating
normally at the
terminal
Check
2.5V output at 3-pin
of CPU power IC155
Check
whether the clock of
33.33MHz is generated at 7-pin
of IC102(Clock
Generator)
J101(DIP Switch)
Check Setting
Check whether
4-pin of IC103(Reset Driver)
is high
Check the terminal message
by using Password
“debugLST2400”
Check whether 3.3V is
supplied at Power
Connector 8,9,10-Pin
Check whether X-Tal
(X100) is oscillated
14.318MHz
Check whether System
S/W is downloaded
Check whether 3-pin of
IC101(Reset IC) is low
Check whether IC104,
IC138(CPLD) is
programmed
Summary of Contents for HDR230
Page 28: ......
Page 34: ......
Page 37: ......
Page 38: ...3 17 3 18 4 WAVEFORMS 1 DIGITAL SYSTEM CLOCK GENERATOR PART 1 2 3...
Page 39: ...3 19 3 20 2 DIGITAL SYSTEM SYSTEM MEMORY PART 1 2 3...
Page 40: ...3 21 3 22 3 VIDEO PLL PART 1 2...
Page 41: ...3 23 3 24 4 VIDEO OUTPUT CONNECTOR PART 1 2 3 BMK800 BMK800 BMK800 33PF 33PF 33PF...
Page 43: ...3 27 3 28 6 PVR CLOCK PART 1 2 3...
Page 44: ...3 29 3 30 7 VSB VSB DECODER PART 1...
Page 45: ...3 31 3 32 8 VSB DOWN CONVERTER PART 1...
Page 46: ...3 33 3 34 9 MICOM DOWN CONVERTER PART 1...
Page 47: ......
Page 65: ...3 74 3 75 10 VSB CIRCUIT DIAGRAM IF VSB TP Data clock error valid 03 3 15 HDR230 DNS...
Page 67: ...3 78 3 79 12 POWER IF COM VIDEO CIRCUIT DIAGRAM CVBS OUT Y OUT C OUT 03 3 15 HDR230...
Page 68: ...3 80 3 81 13 FRONT CIRCUIT DIAGRAM RIGHT LEFT 03 3 15 HDR230...
Page 69: ...3 82 3 83 8 PRINTED CIRCUIT DIAGRAMS 1 DIGITAL MAIN PRINTED CIRCUIT DIAGRAMS TOP...
Page 70: ...3 84 3 85 2 DIGITAL MAIN PRINTED CIRCUIT DIAGRAMS BOTTOM...
Page 72: ...3 88 3 89 5 POWER PRINTED CIRCUIT DIAGRAM LOCATION GUIDDE...
