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Hi-Fi Products
CSA-13
Service Bulletin
Sony Service Company - Technical Services A Division of Sony Electronics Inc. Sony Drive, Park Ridge, New Jersey 07656
Model: HCD-C33/C55 Subject: Initialization Information Symptom: (**)
No.
460
Date: November 27, 1995
Sequence of events during Initialization
Reference: Tokyo fax Autoflagged - NO
PRINTED ON RECYCLED PAPER
PRINTED IN USA
Hi-Fi Products Service Bulletin No. 460
Tray Open/Stock-In Function
Begin - Open/Stock-In Wait for completion of Open (CF1*)/Stock-In(CF2*)cycle. 100 msec. Brake 150 msec PWM push 100 msec Brake (again) Confirm - Open/Stock In Completion If Open/Stock-In Completion End If no Open/Stock Completion
Push with PWM
*Cf1= Open Completion (Out-SW is On or closed, and In-SW is OFF or open) *Cf2= Stock-In Completion (Stock-In-SW is ON or closed)
Hi-Fi Products Service Bulletin No. 460
Tray Closed/Stock -Out Function
Begin Close/Stock-Out Wait for close (Cf3*)/Stock-Out (Cf4*)completion
40 msec reverse Turning After 100 msec braking, confirm Close/stock-out Completion If Close/Stock-out Completion If not Close/Stock-Out Completion Begin Close/Stock-Out (again) Wait for Close/Stock-out Completion After 100 msec braking, confirm Close/Stock-out If confirmed If not confirmed Positioning of tray in Mid position by PWM End, with elevator at Mid position *Cf3= Open Completion (Out-SW is OFF or opened, and In-SW is ON or closed) *Cf4= Stock-Out Completion (Mid-Sense, photo sensor, is On or Mid-Sw is OFF)
Hi-Fi Products Service Bulletin No. 460
Positioning of Tray in a Mid Position
Confirm Mid Position* If not at Mid Position
If yes,
End
Judge direction by Mid-Sw ON/OFF, Move tray by PWM When in Mid Position, apply braking for 100 msec * Mid Position = (Mid-Sense, photo sensor, is ON).
Hi-Fi Products Service Bulletin No. 460
Elevator Up & Down Movement
When Count SW is OFF, "Mechanism Initialization" will scroll across display When Count SW is ON Compare the Current disc and Target disc If Discs are different Move UP or DOWN Toward the target Disc Wait for Count SW OFF If Count SW OFF within 5 sec. Wait for Count SW ON
If same
End
If not OFF in 5 sec., 1st time, it will try a second time by mechanically reversing until the Count SW is OFF. If not, then Mechanical Error" is displayed.
If not ON in 5 sec., 1st time, it will try a second time by reversing until Count SW is ON. If not, then "Mechanical Error" is displayed
If Count SW is ON in 5 sec Current Disc = Target Disc is not
If Current disc is not Target Disc, and Reverse is necessary. 100 msec braking
If Current Disc
Target Disc, and Forward is necessary.
100 msec braking If Count SW = H, "Mechanical Initialization" is displayed If Count SW = L, End.
Hi-Fi Products Service Bulletin No. 460
Main Protection Functions
1.) When Opening the Tray If Count -SW is OFF, it triggers Mech Initialization. If it does not finish opening the tray in 6 sec, it will reverse and close the tray. 2.) When Closing the Tray If it does not finish closing the tray in 6 sec, it will reverse and open the tray. 3.) When Stock-In or Stock-Out If Count SW is OFF, it triggers Mech Initialization. If it does not complete Stock-In/Stock-Out in 6 sec, it will bring the tray back to Mid Position. This function does have 6 sec time limit and if it does not comeback into the Mid Position within 6 sec., it will trigger a "Mechanical Error" message. If it is back with in 6 sec., it will try Stock-In/Stock-Out once again. If it times out, it triggers a "Mechanical Error" message.
Mechanical Initialization
When the A/C cord is first connected, the CPU does not know the status of the CD Mechanism. Therefore, it goes into "Mechanical Initialization" which is as follows: · First, the Main Tray is brought to Mid position if it is not already there. · Second, if any tray (1 to 5) is out, it is returned to the Stocker. · Third, The Elevator is brought to the lowest or Home position. The Mechanical Initialization is also triggered when the Count SW is OFF, that means the Elevator position is in between tray (1 to 5) positions.
Hi-Fi Products Service Bulletin No. 460
Explanation of Switches*
Out-SW (Open- SW): In-SW (Close-SW): ON Stock-In SW (In-SW): When the tray is all the way out, this switch is ON. When the tray is inside of front panel, this switch is
When the tray is all the way inside of the stocker the switch is ON Mid-SW (Out-SW): At Mid position (Mid-Sense is ON), H/L change takes place. When the tray is out, it is OFF (H). Mid-Sense (Mid-Sense):At Mid position (only about 2mm section), ON Count-SW (Count -SW): At every elevator position (1 to 5), this switch is ON. Init-SW (Init-SW): When the CD is being chucked this switch is ON. P.W.M. P.W.M. is used for the loading operation only. Mechanical (Mech.) Error: All motors stop and no further function is activated.
*Former Switch names are in ( )
Hi-Fi Products Service Bulletin No. 460
Filename: HFP0460.SB Directory: J:\SBDOC\NOV95 Template: C:\WINWORD\TEMPLATE\S_BULL.DOT Title: Subject: Author: Hoyt Wing Lee Keywords: Comments: Creation Date: 11/27/95 11:10 AM Revision Number: 2 Last Saved On: 11/27/95 11:10 AM Last Saved By: Hoyt Wing Lee Total Editing Time: 1 Minute Last Printed On: 04/01/96 10:20 AM As of Last Complete Printing Number of Pages: 8 Number of Words: 782 (approx.) Number of Characters: 4,461 (approx.)