Hitachi DV-PF3A(S) Service Manual page 25

FLOW CHART NO.3
Cassette tape can not be loaded.
When loading a cassette tape, on Pin(10) of
IC501, does the "L" pulse switch to the "H" pulse?
When loading a cassette tape, is the specified
voltage (approximately 13V) outputted to the
terminal of the Loading Motor Unit?
Replace the Loading Motor Unit.
FLOW CHART NO.4
Cassette tape is ejected right after the loading.
When loading a cassette tape, on Pin(10) of IC501,
does the "L" pulse switch to the "H" pulse?
When loading a cassette tape, on Pin(4) of IC501,
does the "L" pulse switch to the "H" pulse?
When loading a cassette tape, does the LD-SW
operate normally?
Replace IC501.
FLOW CHART NO.5
Cassette tape can not be ejected.
When pressing the eject button, does the Capstan
Motor start rotating?
While the Capstan Motor is rotating, is the Takeup
Reel rotating?
While the Takeup Reel is rotating, is the reel pulse
signal inputted to Pin(80) of IC501?
While the reel pulse signal is inputting, is "L" pulse
inputted to Pin(81) of IC501?
Is the specified voltage (approximately 13V)
outputted to the terminal of the Lading Motor Unit?
Is the Loading Motor rotating?
Check the Cassette Cam or Cassette Gear, etc,
and service it if detective.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No Check the line between the start sensor and
Pin(10) of IC501, and service it if detective.
No
Replace the Capstan Motor Unit.
Check the line between the start sensor and
No
Pin(10) of IC501, and service it if detective.
No
Check the line between the end sensor and
Pin(4) of IC501, and service it if detective.
Check the line between the LD-SW(SW507) and
No
Pin(9) of IC501, and service it if detective.
No Refer to "FLOW CHART NO.6 " <The Capstan
Motor does not rotate>.
No
Check the Reel Disc or Reel Drive Unit, and
service it if detective.
No
Check the line between the Takeup Reel sensor
and Pin(80) of IC501, and service it if detective.
No
Replace IC501.
No
Replace the Capstan Motor unit.
No
Replace the Loading Motor unit.
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