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1.Power SW ON
2.Cassette-in and
Cassette-out
3.Key entry operation
Remote control
4.Special Functions
Counter Functions
Tracking
5.Playback Function
Picture Sharpness
Tone Quality
Others
6.REC/PLAY Function
Picture Sharpness
Tone Quality
Others
SECTION 3
SERVICING DIAGRAMS
1. INSPECTION PROCEDURES
Operation steps
Timer setting
Timer/counter, Memory
Channel selection,
AFC operation,
EE pictuer & tone quality
Cassette-in
Cassette loading
Eject
Cassette-out
REC, PLAY
Cue/Review
Still, Frame feeding/slow
FF/REW
Linear time counter,
Index/skip search, Time search
Digital auto tracking
PLAY
(Test tape : ST-C6/ST-C7)
Cue/Review
Still/Slow
REC/PLAY
Items to be confirmed
Clock setting operation
Mode display lamp
TV receive condition
Channel select operation,
AFC operation level,
EE pictuer and tone quality,
Tone signal level
F/L machanism operation
Cassette loading operation
Eject operation
Indicator lamp
Abnormal sound
VTR display, OSP
Each mode operation
(Tape draive operation)
Abnormal sound
Each mode operation
Mode operation
Resolution, S/N,
Hue, Saturation,
Color unevenness,
Color dropout,
Sound distortion,
Level variation,
Picture noise, Jitter,
Picture swing,
Skew distortion,
Flicker, Beat
Resolution, S/N,
Hue, Saturation,
Color unevenness,
Color dropout,
Sound distortion,
Level variation,
Picture noise, Jitter,
Picture swing
Skew distortion,
Flicker, Beat
Inspection block
KDB
Power
Logic
PIF
Video (EE, Rec mode)
Audio (EE, Rec mode)
Servo/Logic
Servo/Logic
Video PLAY system
Audio PLAY system
Servo system
Video PLAY system
Audio PLAY system
Servo system
Block | Circuit
Diagram | Diagram
SWVHD
ONIDI
€ NOI
How to use the table
3. Ifa problem is found on the item, check waveforms (level) referring to the block diagram relating to the items.
4. Use PC board pattern diagram and schematic diagram to examine the circuit precisely.
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