Panasonic REV-1 - System Control Circuit & Mechanism Control Circuit

●
ServiceMode
ServiceData
NoteforcheckingServiceDataNumbers
Number
Indication
Remarks
Numbers
00
Nolightdetectedateithersensor
Tapenotrequired.
Tapebeginning
01
1
Lightto Supplyphotosensorisblocked.
Tapeend
02
Light to Take-up photo
sensorisblocked.
03 Light detected at both sensors.
00 EJECT
Taperequired
01 Cassettedown *1.STOP3:Pintchrolleris onCapstanmotor
02 REV, REV SLOW
shaft.
03 Loading/Unloading
*2.
STOP: PintchrollerisoffCapstanmotorshaft.
2
PLAY,REC,STILL,PAUSE,CUE,FWDSLOW,
04
STOP3*1
05 STOP*2
06 FF/REW
07 Intermediateposition
Disregardservicedatadisplayeduntilmechanism
Anydisplayotherthan“00”indicatesafaultinthe
Taperequired.
3
operationiscompleted.
00 modeswitchcircuitorsystem.
Thenthedisplayshouldindicate“00”.
4 Displayonlywhentheoperatingbuttonis pressed.
Tapenotrequired.
Leftdigitonly,disregardRightdigitdisplay.
81
8,9, u,A,—, n, Landnodisplayindicatethatthe
Taperequired.
Left Right Capstanmotor“PLAY”commandreceivedby
Ifasymbolotherthanthoselistedisdisplayed,a
DigitDigit Systemcontrolmicroprocessor.
malfunctioninthatcircuitisindicated.
Rightdigitonly,disregardleftdigitdispaly.
87
1,2, 3,4, 5,6,7 indicatethattheCapstanmotor
5
Left Right “CUE,FF,FWDSLOW”commandsreceivedby
DigitDigit systemcontrolmicroprocessor.
Rightdigitonly,disregardleftdigitdisplay.
8— 8,9, u,A,—, n,Landnodisplayindicatethatthe
Left Right Capstanmotor“Reverse,REW,ReverseSlow”
DigitDigit commandsreceivedbysystemcontrol
microprocessor.
Leftdigitonly,disregardRightdigitdisplay.
10 1,3,5,7, 9,A, nandnodisplayindicatethatthe
Taperequired.
6
Left Right cylindermotor“ON”commandreceivedbysystem
[fasymbolotherthanthoselistedisdisplayed,a
DigitDigit controlmicroprocessor.
malfunctioninthatcircuitisindicated.
Fig. D5 Service Data Display and Indication