Sega CD II User Manual

f f:..f)L-1:
7. TOC (Total of Contents) READ-IN FLOWCHART
Focus operation timing
Focus drive signal at JC403 pin@
v~r ~i~,// [5]
'
F~~iz~~~rI_Pc.:X~l :
Vref
IC401 pin @ , ·'
[5]
Sense~~ =i_ [G]
Focused point
IC404 pin
@or IC403 pin @
10
Focus~~ -------- -1 L______ _ ______ [6]
Broken lines show that focus is
not obtained.
[1] Power ON
[2] Pickup moves to inner edge.
NO
[4] LaserON
[5] Focus search
[6] Focus servo ON
- [7] Make a disc rotate.
[8] Tracking servo ON
[9] Disc servo ON
[1 OJ Reads in the TDC (disc data).
END
IC403pin@
Vrcf SWS~I ON [
3
]
~
IC403 pin@
sv-1v
--SW501 ON
~~ - ___ - __ -_ -L [3]
IC402pin@
sv-1v
~~ ________ ___! Laser ON [4]
IC403 pin Cl)
/\ /1 [5]
Vrcf--/ V '---
--~~':~~P_!:~~-~~~~~-~P-~-~-~~~~2-
IC403 pin@
Vrcf --uf~.,//L_ __
[6]
IC403 pin@
vrcr Ji~8vl __________ __
[7]
IC403 pin@
S..VoO'\.~ [BJ
IC403pin@
~50ms/~~! .
500ms/div.
IC401
pin@
[10)
SV ..-Starts reading data.
ovER~-'---

Sega CD II Specifications

General

Brand	Sega
Model	CD II
Category	Game Console
Language	English