Sony STR-DH720 Service Manual page 4

STR-DH720/DH720HP
Ver. 1.2
NOTE OF REPLACING THE IC1500 AND IC1600 ON THE
DCDC BOARD
IC1500 and IC1600 on the DCDC board cannot exchange with
single. When these parts on the DCDC board are damaged,
exchange the entire mounted board.
NOTE OF REPLACING THE IC2106 ON THE DIGITAL
BOARD
IC2106 on the DIGITAL board cannot exchange with single.
When this part on the DIGITAL board is damaged, exchange the
entire mounted board.
NOTE OF REPLACING THE IC3500 AND IC3501 ON THE
D-VIDEO BOARD
IC3500 and IC3501 on the D-VIDEO board cannot exchange with
single. When these parts on the D-VIDEO board are damaged,
exchange the entire mounted board.
NOTICE OF BOARD VERSION CHECK
D-VIDEO board (Suffi x-11), DIGITAL board (Suffi x-11), DCDC
board (Suffix-11), MAIN board (Suffix-13) and STANDBY-A
VIDEO PC board (Suffi x-13) is synchronised. When any of the
mounted board replacement is necessary, check the defective
board version and order the same version of mounted board in
part list.
MICOM (IC2105) ON DIGITAL BOARD SERVICE POSITION
• In checking the MICOM (IC2105) on the DIGITAL board,
prepare a set of extension jigs (A-1825-238-A) which consists
of two extension cables.
Extension jigs
(A-1825-238-A)
Connect jig to the DCDC board (CN1501 (6P))
and D-VIDEO board (CN3510 (6P)).
DCDC board
4
D-VIDEO board
Connect jig to the DIGITAL board (CN2513 (20P)),
(CN2603 (8P)) and D-VIDEO board (CN3003 (20P)),
(CN3004 (8P)).
DIGITAL board