SONY GVA500
Service Manual

2-2. MSW Codes � The lower parts of the data of addresses 12, 16 and 1A represent the MSW codes (mode switch, mechanism position) when errors occurs. � The upper parts of the data of addresses 12, 16 and 1A represent, when the mechanism position is to be moved, the MSW codes at the start of movement (when moving the loading motor). � The lower parts of the data of addresses 13, 17 and 1B represent the MSW codes of the desired movement when the mechanism position is to be moved. � Unloading
Mechanism position MSB MODE SW C MODE SW B MODE SW A EJECT BL USE

Releasing lock of cassette campartment

Mechanism Position MSWCode EJECT BL USE LOAD STOP TURN RECP/PB REW 1 7 3 2 6 4 0 5

0 0 0 1 = 1

0 1 1 1 = 7

Loading �

LS chassis movement range

Contents Position at which the cassette compartment lock is released. The mechanism will not move any further in the unloading direction. BLANC code. Between two codes. The mechanism will not be stopped by this code while it is operating. EJECT completion position. When the cassette is ejected, the mechanism will stop at this position. Code during loading/unloading. Code that is used while the LS chassis is moving. Normal stop position. The pinch roller separates, the tension regulator returns, and the brakes of both reels turn on.

Position at which is used when the pendulum gear swings from S to T or from T to S. PB, REC, CUE, REV, PAUSE, FF positions. The pinch roller is pressed and tension regulator is on. REW position. REW are carried at this position. The mechanism will not move any further in the loading direction.

0 0 1 1 = 3

BL

LOAD

BL STOP BL

TURN

BL

REC/PB

BL

REW

0 1 1 1 = 7 0 0 1 0 = 2

0 1 1 1 = 7

0 1 0 0 = 4

0 1 1 1 = 7

Pinch roller is detached

0 1 1 0 = 6
Pinch roller is pressed

0 1 = 7

0 0 0 0 = 0

0 1 1 1 = 7

0 1 0 1 = 5

5-20