3-6
no 2.5v
is there about 3.3v
at the ic151 Pin1?
check d154 on i/o and
d127 on SMPS board
yeS
yeS
no
is there about 4v ~ 5v
at the ic151 Pin4?
check the ‘Pwr ctl “h”’
signal from µ-coM
yeS
no
check the ic151 and replace
no 1.8v
is there about 3.3v
at the ic154 pin 3 ?
check power supply 3.3v on i/o board
yeS
yeS
no
check the ic154 and replace
no Sw_5.3va
is the vcc (5.3v)
Supplied to q158
emiter ?
check 5.3va on SMPS board
yeS
yeS
no
is there about 0v
at r179 and r156?
check the “1w_h” signal from µ-coM
yeS
no
check the q158 and replace
Summary of Contents for RHT497H
Page 11: ...1 10 MEMO ...
Page 34: ...3 19 DDR Bank Address 3 4 6 5 DDR RAS CAS 4 5 DDR Write Enable 6 3 ...
Page 35: ...3 20 12C_SDA 7 12C_SCL 8 IC1101 7 8 ...
Page 37: ...3 22 3 AUDIO BLOCK 1kHz SINEWAVE INPUT AOUT_D0 3 AOUT_MCLK 4 AOUT_FSYNC 1 AOUT_SCLK 2 1 2 3 4 ...
Page 38: ...3 23 SPDIF_OUT 5 5 IC1101 A OUT_l A OUT_R 6 7 7 6 ...
Page 39: ...3 24 4 SERIAL INTERFACE BLOCK Between MAIN I O E5_SPI_MISO 3 E5_SPI_CLK 1 E5_SPI_MOSI 2 1 2 3 ...
Page 40: ...3 25 5 TUNER BLOCK 1 SIF IC901 1 ...
Page 43: ...3 28 2 WIRING DIAGRAM 2 1 2 3 4 5 6 7 8 ...
Page 44: ...3 29 1 2 3 4 5 6 7 8 Option ...
Page 57: ...3 42 MEMO ...
Page 59: ...3 45 3 46 2 MPEG CIRCUIT DIAGRAM ...
Page 60: ...3 47 3 48 3 FLASH DDR CIRCUIT DIAGRAM ...
Page 61: ...3 49 3 50 4 IEEE1394 CIRCUIT DIAGRAM ...
Page 62: ...3 51 3 52 5 ATAPI HDMI USB CIRCUIT DIAGRAM ...
Page 63: ...3 53 3 54 6 I O µ COM CIRCUIT DIAGRAM ...
Page 64: ...3 55 3 56 7 SCART RCA CIRCUIT DIAGRAM ...
Page 65: ...3 57 3 58 8 TUNER DECODER CIRCUIT DIAGRAM ...
Page 66: ...3 59 3 60 9 LDO CIRCUIT DIAGRAM ...
Page 67: ...3 61 3 62 10 COMMON INTERFACE BOARD CIRCUIT DIAGRAM OPTIONAL ...
Page 68: ...3 63 3 64 11 HDMI DAUGHTER BOARD CIRCUIT DIAGRAM ...
Page 69: ...3 65 3 66 12 TIMER CIRCUIT DIAGRAM ...
Page 70: ...3 67 3 68 13 KEY CIRCUIT DIAGRAM ...
Page 75: ...3 77 3 78 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 76: ...3 79 3 80 2 I O P C BOARD TOP VIEW ...
Page 77: ...3 81 3 82 I O P C BOARD BOTTOM VIEW ...
Page 78: ...3 83 3 84 3 SMPS P C BOARD TOP VIEW BOTTOM VIEW ...
Page 79: ...3 85 3 86 4 TIMER KEY P C BOARD TOP VIEW BOTTOM VIEW ...
Page 81: ...3 89 3 90 MEMO MEMO ...
Page 98: ...4 17 2 DISC SPECIFICATION 3 DISC MATERIALS 1 DVD ROM ...
Page 103: ...4 22 3 Layout of DVD RW disc ...
Page 104: ...4 23 4 Layout of DVD R RW disc ...
Page 133: ...4 52 MEMO ...
Page 134: ...4 53 4 54 CIRCUIT DIAGRAM ...
Page 136: ...4 57 4 58 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW ...