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Hitachi CM802U CRT monitor, Anyone know what IC I701 is?

Photo here:

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Part of: Hitachi 21" monitor, model CM802U Manufactured June 1997

Issue: Heavy vertical jitter for about 30 seconds during warm up, even after blank screen screen saver.

Designation: I701,

Location: Front center on main board.

Markings: LA7860, 7BBS (no logo.)

Identified it by selective cooling with compressed air, general areas, then through a couple feet of thin shrink tubing, then by dabbing with a swab soaked in freeze spray. screen shakes when the chip passes through a certain temperature range. =20

  1. Is this a common part, or some Hitachi ASIC?

  1. If I somehow managed to find a Hitachi servicer, would they replace the part, or the whole board (assuming they're still available.)?

Yes, I could just buy a LCD display, but, to get the same real estate of my two 21" CRT's, I'd have to buy an (expensive) 30" widescreen, like the Dell 3007WFP.. =20

-- Email reply: please remove one letter from each side of "@" Spammers are Scammers. Exterminate them.

Reply to
Doug Warner
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Part of: Hitachi 21" monitor, model CM802U Manufactured June 1997

Issue: Heavy vertical jitter for about 30 seconds during warm up, even after blank screen screen saver.

Designation: I701,

Location: Front center on main board.

Markings: LA7860, 7BBS (no logo.)

Identified it by selective cooling with compressed air, general areas, then through a couple feet of thin shrink tubing, then by dabbing with a swab soaked in freeze spray. screen shakes when the chip passes through a certain temperature range.

  1. Is this a common part, or some Hitachi ASIC?

  1. If I somehow managed to find a Hitachi servicer, would they replace the part, or the whole board (assuming they're still available.)?

Yes, I could just buy a LCD display, but, to get the same real estate of my two 21" CRT's, I'd have to buy an (expensive) 30" widescreen, like the Dell 3007WFP..

-- Email reply: please remove one letter from each side of "@" Spammers are Scammers. Exterminate them.

You can get one at

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Don't remember if they have a minimum order.

--
Dave M
MasonDG44 at comcast dot net  (Just substitute the appropriate characters in the 
address)

Life is like a roll of toilet paper; the closer to the end, the faster it goes.
Reply to
DaveM

Didn't even bother to Google this did you?

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on the *first* Google hit.

Reply to
PeterD

Nope.. I was dead tired, and just plain forgot.=20 Searched the next day, found the datasheet, (Deflection generator - fits the symptom) Found a dealer, ordered one. =20 Also found a place to order a service manual (poor PDF scan for $15.00 with zero disassembly info. =20 Guess I'll have to dredge up my old TV repair skills,=20 (Yes, I know how to discharge a CRT, and attach a clip lead to the

2nd anode connection to keep the charge from rebuilding..)

-- Email reply: please remove one letter from each side of "@" Spammers are Scammers. Exterminate them.

Reply to
Doug Warner

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