51
VT-G14
VT-G21
MECHANISM TROUBLESHOOTING
1. FF/REW FAILURE (NO TAPE WINDING)
Press FF button.
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
Is master cam at
FF position ?
Does loading
motor operate?
Modes changing
smoothly through
cam switch ?
Loading motor
control system
in trouble.
Are 12V and
5V supplied ?
Replace the
capstan motor.
Replace the idler
wheel ass
y.
Replace the reel
sensor.
Loading motor is
damaged.
Replace it.
Voltage supply
system in trouble.
Mode sensor
(CAM SW A and B)
system in trouble
or master cam
malpositioned.
Voltage supply
system in trouble.
Does capstan
motor turn in FF (or
REW) direction ?
Are idler wheel
ass
y and reel disk
in mesh ?
Does the pulse
output from reel
sensor ?
The cassette tape
is presumably
damaged.
2. REC/PLAY FAILURE (MODE RELEASE)
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
Is the master cam
at PB position ?
Does loading
motor operate ?
Modes changing
smoothly through
cam switch ?
Mode sensor (CAM
SW A and B) system
in trouble or master
cam malpositioned.
Loading motor
control system
in trouble.
Are 12V and
5V supplied ?
Replace the
capstan motor.
Replace the idler
ass
y.
Replace the reel
sensor.
Loading motor is
damaged.
Replace it.
Voltage supply
system in trouble.
Voltage supply
system in trouble.
Does capstan
motor turn ?
Are idler wheel
ass’y and reel disk
in mesh ?
Is the pulse
outputted from reel
sensor ?
Check main PWB.
Does voltage
supply at loading
motor ?
Is voltage applied
to loading motor ?
Содержание VT-G14
Страница 69: ...71 VT G14 VT G21 70 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM OF TV SECTION 1 ...
Страница 76: ...80 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H MODEL VT G14 SCHEMATIC DIAGRAM OF TV SECTION CRT and POWER Unit ...
Страница 77: ...81 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H MODEL VT G14 SCHEMATIC DIAGRAM OF TV SECTION KEY and IF Unit ...
Страница 80: ...86 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H MODEL VT G21 SCHEMATIC DIAGRAM OF TV SECTION CRT and POWER Unit ...
Страница 81: ...87 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H MODEL VT G21 SCHEMATIC DIAGRAM OF TV SECTION KEY and IF Unit ...
Страница 85: ...94 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM OF VCR SECTION Ë SYSTEM CONTROL BLOCK DIAGRAM ...
Страница 86: ...95 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM OF VCR SECTION Ë SAFETY DEVICE BLOCK DIAGRAM ...
Страница 88: ...98 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM OF VCR SECTION Ë Y C BLOCK DIAGRAM ...
Страница 90: ...101 VT G14 VT G21 100 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM OF VCR SECTION VCR 1 Unit ...
Страница 93: ...106 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H PRINTED WIRING BOARD ASSEMBLIES PWB C POWER Unit Wiring Side ...
Страница 94: ...107 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H PWB F KEY Unit Wiring Side PWB D CRT Unit Wiring Side ...
Страница 95: ...109 VT G14 VT G21 108 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Wiring Side ...
Страница 96: ...111 VT G14 VT G21 110 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Chip Parts Side ...
Страница 98: ...113 VT G14 VT G21 6 5 4 3 2 1 A B C D E F G H Chip Parts Side Wiring Side PWB B TUNER DEF Unit ...