New Description
A 29" monitor featured in many machines, including the Sega New Astro City and Taito Egret II, in addition to many dedicated machines.
The biggest feature this monitor has over the MS8-29 is a unified Contrast adjustment, which adjusts gain of all three channels in unity. In addition, changing gain will not offset the bias level, so color tracking is not distorted in proportion to the bias levels.
This monitor supports 15KHz and 24Khz horizontal refresh rates.
'''B+ Voltage'''
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The main DC supply voltage, B+, can be checked using the TP2 test point. It is located in the center of the PCB, in the corner of the "U" shaped side of the heatsink next to the empty inductor location L505.
The correct B+ voltages are:
*15KHz: +76V DC
*24KHz: +119V DC
'''Factory Bodges'''
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'Rev. D "05A00585D1'
* Wire link between middle pin of Q550 and C558 (innser side, close to U550)
* 470pF capacitor between third leg of D101 and negative pin of C101
* 2.2nF capacitor between pins 1 and 2 of T501
* Cap marked "102M" between ground and pin 3 of CN902
Old Description
A 29" monitor featured in many machines, including the Sega New Astro City and Taito Egret II, in addition to many dedicated machines.
The biggest feature this monitor has over the MS8-29 is a unified Contrast adjustment, which adjusts gain of all three channels in unity. In addition, changing gain will not offset the bias level, so color tracking is not distorted in proportion to the bias levels.
This monitor supports 15KHz and 24Khz horizontal refresh rates.
'''Factory Bodges'''
---
'Rev. D "05A00585D1'
* Wire link between middle pin of Q550 and C558 (innser side, close to U550)
* 470pF capacitor between third leg of D101 and negative pin of C101
* 2.2nF capacitor between pins 1 and 2 of T501
* Cap marked "102M" between ground and pin 3 of CN902