Alpine Ai-NET CHA-1214 Service Manual page 14

CHA-1204
lil. Operating Specifications
The automatic adjustment operations of the CHA-1204 are performed by output of the commands of the
The following test discs are required for the good/fault judgment:
1. A-BEX TCD-721 (6th track - 1.2mm) : Scratch test disc
2. A-BEX TCD-782 : Signal test disc
Measures to be Taken Corres
i) LED indications
Lit : Fault Unlit : OK
Adjustment | LED Name| Adjustment Order Contents
Order
AOC2 Tracking offset Corrects the tracking error value as an offset.
adjustment
im:
fo Ball d
| = | oer [omen pial earl ean cae
AOC1 Focus offset Corrects the focus error value as an offset.
adjustment
4 AGC1 Focus rough gain Determines the amount of extemal interference
adjustment applied at the time of the focus rough gain adjustment.
AGC2 Tracking rough gain} Determines the amount of extemal interference
adjustment applied at the time of the racking rough gain adjustment
ABC1 Focus balance Provides correction so that the focus error signal can take
adjustment balance between positive sections and negative sections.
7 ABC2 Tracking balance Corrects the average value of the tracking error as a balance
adjustment value.
FAGC Focus fine gain Introduces extemal interference and adjusts the focus gain to
adjustment an appropriate value,
TAGC Tracking fine gain | introduces extemal interference and adjusts the tracking
adjustment gain to an appropriate value.
ii) Seven-Segment LED (LPS Value)
This mechanism has 26 position of 1T to 12T, 1P to 12P, E, HP.
* The 1st to 12th disc traies step each 1T to 12T to be drawn out of the magazine.
The ist to 12th discs step each 1P to 12P to disc chuck and play.
E is the position that magazine ejects.
HP is elevator stand-by position without the magazine.
NOTE 1: Display of each position 5
value of limit of HEX cod, LPS
(liner position sensor) is to rmal.
NOTE 2: Incase of LPS is normal
and disc change actuatin is
not smooth, check magairse
circumference tray chasss again.