3-4
Replace X101
Check IC308 power and
other circuits
LG LOGO not displayed
at POWER : ON.
IC308 - 8 : HIGH?
( /E5_RST )
RESET IC202 - 26 : check
signal? (/FCS0 )
Check IC313 signal flow
X101 : Clock oscillated?
( 13.5 MHz )
NO
NO
NO
YES
YES
Check IC202 power and
other circuits
YES
Check SMPS
NO
Check DRIVE power?
5V, 12V
Check ATAPI Interface
connector J301
YES
3. SYSTEM Circuit
4. DISC not recognized.
Summary of Contents for RH4820W
Page 40: ...3 41 3 42 2 E5 BGA POWER UART2 CIRCUIT DIAGRAM E5 BAG POWER UART2 ...
Page 43: ...3 47 3 48 5 1394 ETHERNET CONNECTOR CIRCUIT DIAGRAM 1394 ETHERNET CONNECTOR ...
Page 44: ...3 49 3 50 VIDEO IN OUT 6 VIDEO IN OUT CIRCUIT DIAGRAM ...
Page 45: ...3 51 3 52 7 AUDIO IN OUT CIRCUIT DIAGRAM AUDIO IN OUT ...
Page 46: ...3 53 3 54 8 I O MICOM CIRCUIT DIAGRAM SR17208A I O MICOM ...
Page 47: ...3 55 3 56 9 TUNER VIDEO IN OUT CIRCUIT DIAGRAM SR17209A TUNER VIDEO IN OUT 3 9K 3 9K ...
Page 48: ...3 57 3 58 10 FRONT CIRCUIT DIAGRAM HDD VDR_FRONT ...
Page 54: ...3 69 3 70 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP SIDE LOCATION GUIDE ...
Page 55: ...3 71 3 72 2 MAIN P C BOARD BOTTOM SIDE LOCATION GUIDE ...
Page 57: ...3 75 3 76 5 FRONT P C BOARD LOCATION GUIDE 6 KEY P C BOARD ...
Page 58: ...3 77 3 78 7 POWER P C BOARD LOCATION GUIDE ...
Page 88: ...3 108 4 IC302 uPD76f0047 MICOM Pin Assignment ...
Page 110: ......
Page 112: ...3 132 3 133 2 DSP CIRCUIT DIAGRAM No Power No operation DSP IC RESET IC SDRAM R259 0Ω ...
Page 114: ...3 136 3 137 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE ...