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TROUBLESHOOTING THE 5275
TROUBLESHOOTING SECTIONS
The Troubleshooting Information on the following pages has been divided
into three sections with subsections in order to make it easier for the techni-
cian to find the particular section of interest. It is recommended that the fol-
lowing outline be used for troubleshooting:
1.
2.
3.
4.
Try out the unit, preferably with the customer’s tape, until the malfunc-
tion occurs.
If the motor works, skip Section I, Power Supply, and go directly to the
relevant section.
Note that the subsections are in functional order; for instance troub-
leshooting a problem with Audio Record means that Audio Playback
must first be verified.
The Sections are as follows:
I. Power Supply and Motor IIA. Audio Playback IIIA.
Sync Tone Generator
IIB. Audio Record 111B. Sync Record
IIIC. Sync Playback
IIID.
Sync and Audio Record
Directions: Follow
each test in order. The correct voltage or
terminal, which is located on
the left side of the unit and has a
waveform
will lead
you
to the next step; an in correct rneasure-
black wire connected to It.
ment will lead you to the defective component(s). From Step All voltages given are nominal, and may be 10% above or
2 on, the ground connectiin is taken from the negative battery below the stated voltages.
1. POWER SUPPLY AND MOTOR
