Hitachi DVPF2E, Service Manual

Page: 29 / 112

E1-8-8
FLOW CHART NO.3
FLOW CHART NO.4
Cassette tape can not be loaded.
Cassette tape is ejected right after the loading.
FLOW CHART NO.5
Cassette tape can not be ejected.
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(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 pressing the eject button, does the Capstan
Motor start rotating? Refer to "FLOW CHART NO.6 (The Capstan
Motor does not rotate)."
Check the Reel Disc or Reel Drive Unit.
Check or replace IC501.
Replace the Capstan Motor unit.
Replace the Loading Motor unit.
While the Capstan Motor is rotating, is the Takeup
Reel rotating?
Is the Loading Motor rotating?
Check or replace the Cassette Cam or Cassette
Gear, etc.
While the Takeup Reel is rotating, is the reel pulse
signal inputted to Pin(80) of IC501?
While the reel pulse signal is inputting to
Pin(81) of IC501, is Pin(81) of IC501 in "L" level?
Is the specified voltage (approximately 13V)
outputted to the terminal of the Lading Motor Unit?
When loading a cassette tape, does the LD-SW
operate normally?
When loading a cassette tape, is the specified
voltage (approximately 13V) outputted to the
terminal of the Lading Motor Unit?
Check the line between the start sensor and
Pin(10) of IC501.
Replace the Capstan Motor Unit.
Replace the Lading Motor Unit.
Replace IC501.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Check the line between the start sensor and
Pin(10) of IC501.
Check the line between the end sensor and
Pin(4) of IC501.
Check the line between the LD-SW(SW507) and
Pin(9) of IC501.
Check the line between the Takeup Reel sensor
and pin(80) of IC501.
No
No
No
No
No
No
No
No
No
No