Checking Audio Or Video Circuit; By Using Cd And Cdv; By Using Ld - Denon LA-3500 Service Manual

-LA-3500
34
8 Checking Audio or Video Circuit
CD
By
using CD and CDV (Video)
1) Setting
(a) Remove Top Cover.
2) Checking
2U-2570 (Main P.W.B. )
2U-2571 (Sub P.W.B.)
(b) Remove Tray, Connect Plate , Clamper Plate and Slide
Guide Plate.
Playback the disk in the mode as per the Figure , and check the
circuit. Be sure use CD or CDV disk, and never playback LD .
(a) Video circuit check ··· CDV disk video part.
(c) Stand Main and Sub P.W.B. as per Figure. (b} Audio circuit check ... CD.
(d) Detach Clamper from Clamper Plate , load a disk as per
Figure and clamp the disk.
(2)
By
using LD
SGK-0072 11 Pin Exten sion Cord (Common to LA-3250K)
SG K-0071 7 Pin Flat Extension Cord
(a) Remove Top Cover.
SGK-0069 8 Pin Extension Cord (Common to LA-3250k)
SGK-0068 27 Pin Flat Extension Cord
P.W.B. Ass'y
2U-2570
2U-2571
2U-2573-2
SGK-0070 15 Pin Extension Cord
Front Panel
(b) Remove Tray, Connect Plate, Clamper Plate and Slide Guide Plate.
(c) Remove Front Panel, Regulator P.W.B. (2U-2573-2) and take P.W.B. Ass'y (2U-2570 and 2U-2571 )out.
(d} Connect extension cords to 2 wires to Traverse Mechanism , 1 wire to Spindle Motor, 1 wire to Power Switch P.W.B., and 1
wire to Switch P.W.B. as per Figure above.
Also, change flat cable (27pin, ?pin) with extension cords.
Parts No. Name
Remarks
SGK-0068 27 pin flat extension cord Traverse Mechanism ... .. .. Main P.W.B. (Common to LA-3250)
SG K-0069
8 pin extension cord Traverse Mechanism ... ... . Main P.W.B. (Common to LA-3250)
SGK-0070 15 pin extension cord
Spindle Motor ... ..... ... .. .. .. .. Main P.W.B.
SGK-0071
7 pin flat extension cord Switch P.W.B .... .. ...... .... ... . Main P.W.B.
SGK-0072 11 pin extension cord Power Switch P.W.B ..... .. .. Main P.W.B.
(e) Install Slide Guide Plate , Clamper Plate , Connect Plate and Tray.
(f ) Turn power ON , push OPEN/CLOSE button , set a LD to tray and start checking .