Now that the G board is fixed its time to find those missing sprites,i decided to look at the B board as it appears from the schematics that the sprites are generated.There are 12 eproms which contain the sprite data and they are sent to the inputs of a custom chip KNA6034201 and are processed to
generate the sprites.Scoped all the data bits going to the custom and looked good,pin 17 INEN signal looked flaky but was present in TTL level.
Scoped the outputs from the custom pins 26-31 and all were slightly above 0V,i decided to remove this custom and fitted a socket,then took out the
custom from my working B board and fitted it to the faulty board.Now lets fire it up.............
Cool 
Cool the sprites are back but not completely as they are missing half the sprites and are flickereing,the INEN signal was not looking right .
Scoped the outputs from the LS153 at location 1B and pin 9 signal was near to 0v,piggy backed a new ls153.
Fired it up and....................
Oooooooo yes the kung fu legend lives to fight again,soldered in the new LS153 and all was good,played it for a while but the only fault
left is the missing speech sounds when you loose a life.Now that the B board is fixed i went straight to the A board where the sound is generated.
There are 2 speech generation chips OKI5205.
Both of these chips are D/A and produce the samples such as kick,high kick and so on,scoped pin 10(analogue out) on both chips while
playing and the one circled was the culprit where pin 10 was showing stuck high.Had none in my parts so luckily i had a bootleg KFM pcb
so i removed one and socketed it to the faulty A board,fired it up and all speech sounds are back.
The game works great and i played it for an hour ,considering this game was made in 1984 its superb.
So the summary is i bought a KFM pcb where all the boards were faulty,how unlucky was that,anyways i kicked and punched this
boardset and fixed it.
generate the sprites.Scoped all the data bits going to the custom and looked good,pin 17 INEN signal looked flaky but was present in TTL level.
Scoped the outputs from the custom pins 26-31 and all were slightly above 0V,i decided to remove this custom and fitted a socket,then took out the
custom from my working B board and fitted it to the faulty board.Now lets fire it up.............
Cool Cool the sprites are back but not completely as they are missing half the sprites and are flickereing,the INEN signal was not looking right . Scoped the outputs from the LS153 at location 1B and pin 9 signal was near to 0v,piggy backed a new ls153.
Fired it up and....................
Oooooooo yes
the kung fu legend lives to fight again,soldered in the new LS153 and all was good,played it for a while but the only faultleft is the missing speech sounds when you loose a life.Now that the B board is fixed i went straight to the A board where the sound is generated.
There are 2 speech generation chips OKI5205.
Both of these chips are D/A and produce the samples such as kick,high kick and so on,scoped pin 10(analogue out) on both chips while
playing and the one circled was the culprit where pin 10 was showing stuck high.Had none in my parts so luckily i had a bootleg KFM pcb
so i removed one and socketed it to the faulty A board,fired it up and all speech sounds are back
.The game works great and i played it for an hour ,considering this game was made in 1984 its superb.
So the summary is i bought a KFM pcb where all the boards were faulty,how unlucky was that
,anyways i kicked and punched thisboardset and fixed it
.