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Hyper Module Problems

6648 Views 5 Replies 3 Participants Last post by  lcaillo
The hyper module is responsible for scan conversion in many Toshiba sets. Some of the CRT RPTVs have had issues with bad capacitors in the Hyper Module. There is a service bulletin that suggests replacing all of the 10uF surface mount electrolytics in several models. The symptom is usually what looks like a loss of sync, or zig-zag distortion in the image. It may be in one resolution and not another. It can sometimes make the set look like it has a convergence problem. In some sets, there is also a problem with the crystal resonators needing to be resoldered on the Hyper Module.

I have found that in addition to the problems with the 10uF caps, there are usually more bad surface mount electrolytics in the Hyper Module. I suggest ESR testing all of them and replacing all of the 10uF caps and any that test bad.

As an example, this is the list of capacitors that I replaced in one 65H82 in the Hyper Module:
(some caps shared the same label so location includes direction from label on board)

10uF 16V
CZ52, C514, CX270, CX261, CX178, CX221, CX230, CX250, CX670, CX541, CX241

2.2uF 50V
C404, C315, CY42, CY44

22uF 50V
CX137, CX127, CX117, CX133, CX176 (right of label), CX176 (right and below label)

100uF 16V
CV501, RZ68, CZ207, CX174, CX176 (directly below label)


Other sets have had different capacitors that have tested high in ESR. I do not recommend wholesale replacement, as many are good and it is very easy to damage the board even when using great care in removing the caps. The traces on some are not well bonded to the board. I recommend testing with an ESR tester and changing all of the ones that are bad, along with all of the 10uF caps.
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10uF 16V
CZ52, C514, CX270, CX261, CX178, CX221, CX230, CX250, CX670, CX541, CX241
I am not sure what to say. The location numbers are listed above, and they are clearly labelled on the caps as well as in the schematic.
I will second Gadzie's concern but lcaillo observations (& reputation) seems to be correct.

My 57HX81 Service Manual (50H81, TAC0151, file No. 020-200109) also lists all of these caps as:
CX221 P#24619040 Chip, 10pF, ±20%, 16V​
BUT all references online list that part# as:
CAP.,16v-10mfd CHIP​
Is this just a Toshiba part description typo that went uncorrected and filtered through all their docs?
A quick check of the DigiKey smd caps indicates no 16v values lower than 10uf so the "10pf" appears to be an error (and I have never heard of a 10pf electrolytic).

I do not have the schematic and can not comment on that.

This does make me very cautious about repairing this board.

I have not pulled the board yet.
If & when I do, I'll update this as to what I see and measure.
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