TA8659CN; Jungle IC
I’ve heard forum members who were in the trade to the bitter end, folk like Baz & John for example, often talk and remark on the ‘Jungle’ IC. Not having much interest in TV’s much beyond the mid to late 1980’s, I’d zero clue as to what this IC represented. That is until reading a Ferguson Feedback issue this morning. Boy am I’m glad I’ve no interest in those later sets that used them. For those like me who were blissfully unaware or perhaps the likes of Baz, John and others who may like a stroll down memory lane, he’s an overview from Ferguson.
By the way, did it get the ‘Jungle’ nickname due to the sheer number of functions it carried out? A veritable jungle in there!
I checked my stores and was pleasantly surprised I have one in stock, there maybe others.
This integrated IC TA8659CN performs a large number of functions. Included in this 64- pin IC are the colour decoder, sync separator and time based generators. Note: Not all of the features of this IC are used in the example receiver which was an IKC2.
The IC performs the following functions:
- DC-controlled picture sharpness
- Contrast control (with unicolour control)
- Brightness control
- Internal vertical blanking
- ACC control
- DC colour control
- RGB demodulator outputs
- APC loop with no adjustment required
- Tint control
- PAL/NTSC/SECAM auto signal detection
- Forced signal selector
- Auto sub carrier detector and switching
- Sync separator
- Adjustment free, horizontal and vertical oscillators by countdown.
- Horizontal flywheel circuit
- Horizontal pre-driver
- X-ray protection
- 50/60Hz field speed auto selector
- RGB space inputs
- TV/Text switching
- Text contrasts control
- Half -tone space control
The IC has four power input pins:
Pin 6 – chrome circuits
Pin 40 – line stage
Pin 61 – video systems
Pin 63 – RGB output stages
There are two ground connections
Pin 19 – chroma circuits
Pin 50 – video and time base