Samsung SV4002H Victor Not Spinning !!!

[Amarbir[CDR-Labs]]

Hi Mates ,
Got this drive DR is not imp from this drive .Only Need To Repair .This Drive is Not Spinning Its Spindle Motor .Testing the Spindle Motor Does Not Show Short Circuited Motor Windings .The Coding of this Drive is As Following

SV4002H
Rev :A 2002.03
Label ID : LT30290Y
MHA Coding :RRSSA
Motor Coding JVC 020212T
V40 1D

Written Near Motor
SS
V40 10-1
PCB Has Victor Rev 04 Written

I Got a Identical Drive Family With The Following Codings
Model SV4002H
Label Id : LR90G7SN
Rev A 2001.09
MHA Coding QWMSB
Motor Coding :JVC 010823M
Coding on MHA Case Near Motor : V40 01-2
PCb Coding Victor Rev 04

My Questions Are As Following .The Donor Actually Works And Has Defects in SA .Can The PCB of the Same Be Used in the Patient Directly .Do I Have To Swap the EPROM 49F1024 From The Patient to The Donor PCB .Also There Is a Small 8 Legged Ic Like Serial EPROM Which i actually Not Confirm is a Serial EPROM With the Following Codings on It 493A25 Do i Have To Swap This Also From Patient To Donor .Any Expert Comments Are Welcomed Before i Screw Something Up .

[Mikippp]

Hi,
493A25 -> L4931ABD25 (very low drop voltage regulator)
Check patient PCB with donor HDA... (damaged preamp. in patient HDA)

Mikippp

[Amarbir[CDR-Labs]]

Hi,
Are you Sure its a LDO .Secondly Shall i Swap the Parallel EPROM 49F1024 off the patient pcb to the donor pcb and try .Also the donor PCb has 29f102bb [this in My Opinion should not matter ] .I shall resolder the LDO back as it has no significance in the swap at all [ this is if its a LDO ]

[pepe]

Hi

Just put the donor PCB on patient. If it doesn't work, swap ROM. the other IC is not important.
U are right, 49F1024 and M29F102BB are interchangeable, at least when U don't want to program it.

pepe

[Amarbir[CDR-Labs]]

Pepe,
But If We Read From One EPROM With Programmer and Write on The Other EPROM [ As Models Brands Are different ] It Will still Work .100% it Will Just Like BIOS on Motherboards

[pepe]

Hi,

If U like, do so. I thought swapping would be faster easier...

pepe

[Amarbir[CDR-Labs]]

Hi All,
If I Solder the Patient Rom To Other Working Boards The HDD Does Not Spin .I Think i have

1 :Corrupt ROM [What Can I Do In this Stage then ]
2 :Screwed Up EPROM [ Short Circuit ]