1-26 (No.YD068)
4.3.6.2
Tape Path Check between Pinch Roller and Take up Guide (Check in the Rev Mode)
1) Check the tape pass status between the pinch roller and the
take-up guide.(Check there is crumpling of the tape pass and
folding of the take-up guide.)
(1) When holding of the take-up guide bottom occurs
Turn the tilt adjusting screw (C) clockwise and travel it sta-
bly to ensure there is no crumbling or folding of the tape.
(2) When holding of the take-up guide top occurs
Turn the tilt adjusting screw (C) anti-clockwise and travel it
stably to ensure there is no crumbling or folding of the tape.
2) Check there is folding of the tape at the bottom or top of the
take-up guide in cutting-off the REV mode
CAUTIONS
If the RF waveform is changed after adjusting the A/C head,
perform fine adjustment to ensure the RF waveform is flat-
ened.
4.3.6.3
Fine Adjustment (Azimuth Adjustment)
4.3.7 X-Value Adjustment
Adjustment Procedure
1) Connect the probe of Oscilloscope to the audio output
jack.
2) Ensure that Audio 1KHz, 7KHz output is flattened at the
maximization point by adjusting the Azimuth adjusting
screw
(A).
Fig. C-5-4
Fixtures and tools used
Connection position
VCR (VCP) status
Adjustment position
Oscilloscope
Standard test tape
(only for SP)
Driver (+) Type 4mm
Audio Output Jack
Play the Alignment tape
1KHz, 7KHz.
Azimuth Adjusting
Screw (A)
Height Adjusting Screw
(B)
1KHz
A: Maximum
7KHz
B: Minimum
Adjustment Procedure
1) After releasing the auto tracking, lightly turn the fixing
screw. Turn the (+) type driver on the X-dis-tance adju-
sting hole to the right or left. Adjust the RF envelope
level to the maximum point and then fix the fixing screws.
2) For the 31 m head, adjust it with the SP tape recorded
in the width of 31 m since the head travels on the tape
track only for SP with the width of 58 m.
Fig. C-6
Fixtures and tools used
Connection position
VCR (VCP) status
Adjustment position
Oscilloscope
Standard test tape
(only for SP)
Driver (+) Type 4mm
CH-1: PB RF Envelope
CH-2: NTSC ; SW 30Hz
PAL:SW
25Hz
Head switching output
point
RF Envelope output
point
Play the Alignment tape
Left
X-value Adjusting Hole
Tilt Adjusting Screw (C)
Fixing Screw
Height Adjusting
Screw (B)
Right
Grove of Base A/C
Purpose of adjustment : To maintain compatibility with other VCR (VCP).
RF ENVELOPE OUTPUT POINT
HEAD RF SWITCHING OUTPUT POINT
OSCILLOSCOPE
Connection Diagram
CH-2
CH-1
Azimuth
Adjustment
Screw(A)
Summary of Contents for HR-XV28SEF
Page 9: ... No YD068 1 9 SECTION 3 DISASSEMBLY This service manual does not describe DISASSEMBLY ...
Page 69: ... No YD068 1 69 F FE RFL FIG 7 2 DVD F FE RFL FIG 7 3 CD ...
Page 70: ...1 70 No YD068 5 4 8 FOCUS ON WAVEFORM F FE RFL FIG 7 4 CD FOCUS_S FACT FACT FIG 8 1 DVD ...
Page 75: ... No YD068 1 75 5 4 14 AUDIO OUTPUT FROM AUDIO DAC FIG 14 1 ...
Page 78: ......
Page 86: ...A 1 2 3 4 5 B C D E F G SCART JACK CIRCUIT DIAGRAM SHEET 6 2 15 2 16 ...
Page 87: ...A 1 2 3 4 5 B C D E F G ع DVD SERVO CIRCUIT DIAGRAM SHEET 7 2 17 2 18 ...
Page 88: ...A 1 2 3 4 5 B C D E F G ع DVD AV JACK CIRCUIT DIAGRAM SHEET 8 2 19 2 20 ...
Page 89: ...A 1 2 3 4 5 B C D E F G ع DVD SYSTEM CIRCUIT DIAGRAM SHEET 9 2 21 2 22 ...
Page 90: ...PRINTED CIRCUIT DIAGRAMS VCR MAIN BOARD TOP SIDE 2 23 2 24 ...
Page 91: ...VCR MAIN BOARD BOTTOM SIDE 2 25 2 26 ...
Page 92: ...COMPONENT PARTS LOCATION GUIDE VCR MAIN 2 27 2 28 ...
Page 93: ...LOCATION GUIDE LOCATION GUIDE POWER BOARD KEY BOARD 2 29 2 30 ...
Page 101: ...IC7V1_SDA5650X IC802_NM1232 IC903_BH78968FS IC803_LD1117A IC801_ DA9605H IC BLOCK 2 45 2 46 ...
Page 107: ......