3-79
ELECTRICAL TROUBLESHOOTING GUIDE
RL-01A LOADER PART
Reset or Power Check.
Check it after connecting the power cable
only for NO Reset or Power ON.
•Check the power(5V,12V)short.
•Check the PC power cable.
•Repair the PC power supply.
•Check the IC304(3.3V reg.IC).
•Check the IC202,IC302
•Check the X201,X301
•Check the IC202,IC302
•Check the IC303,IC304
Are the pin 41, 44 of CN201
+12V, +5V respectively after the power
cable connecting?
Does the pin 3
of IC203 change 0V to 3.3V
at the power supply initial
input mode?
Are the X201, X301 oscillating?
<Power>
•Is the pin 3 of IC304 3.3V?
•Is the pin 3 of IC303 2.5V?
OK
YES
YES
YES
YES
YES
NO
NO
NO
NO
•1V(IREF):Check pin 109 of IC202
•1.5V(REFIN):Check pin 142 of IC202
•1.25V(REFOUT):Check pin 149 of IC202
•2.25V(REFI2):Check pin 12 of IC107
•2.25V(REF01):Check pin 13 of IC107
•2.5V(FPDVREF):Check pin 28 of IC107
•2.5V(REFI):Check pin 39 of IC107
•1.5V(REF02):Check pin 40 of IC107
<Reference>
Содержание RH4820W
Страница 40: ...3 41 3 42 2 E5 BGA POWER UART2 CIRCUIT DIAGRAM E5 BAG POWER UART2 ...
Страница 43: ...3 47 3 48 5 1394 ETHERNET CONNECTOR CIRCUIT DIAGRAM 1394 ETHERNET CONNECTOR ...
Страница 44: ...3 49 3 50 VIDEO IN OUT 6 VIDEO IN OUT CIRCUIT DIAGRAM ...
Страница 45: ...3 51 3 52 7 AUDIO IN OUT CIRCUIT DIAGRAM AUDIO IN OUT ...
Страница 46: ...3 53 3 54 8 I O MICOM CIRCUIT DIAGRAM SR17208A I O MICOM ...
Страница 47: ...3 55 3 56 9 TUNER VIDEO IN OUT CIRCUIT DIAGRAM SR17209A TUNER VIDEO IN OUT 3 9K 3 9K ...
Страница 48: ...3 57 3 58 10 FRONT CIRCUIT DIAGRAM HDD VDR_FRONT ...
Страница 54: ...3 69 3 70 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP SIDE LOCATION GUIDE ...
Страница 55: ...3 71 3 72 2 MAIN P C BOARD BOTTOM SIDE LOCATION GUIDE ...
Страница 56: ...3 73 3 74 3 I O P C BOARD LOCATION GUIDE 4 JACK P C BOARD LOCATION GUIDE LOCATION GUIDE LOCATION GUIDE ...
Страница 57: ...3 75 3 76 5 FRONT P C BOARD LOCATION GUIDE 6 KEY P C BOARD ...
Страница 58: ...3 77 3 78 7 POWER P C BOARD LOCATION GUIDE ...
Страница 88: ...3 108 4 IC302 uPD76f0047 MICOM Pin Assignment ...
Страница 93: ...3 113 3 Main Clock2 for IC302 20MHz GND LEVEL X301 IC302 PIN 13 4 SDRAM Clock GND LEVEL MCLK IC201 PIN 35 ...
Страница 110: ......
Страница 112: ...3 132 3 133 2 DSP CIRCUIT DIAGRAM No Power No operation DSP IC RESET IC SDRAM R259 0Ω ...
Страница 114: ...3 136 3 137 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE ...