3-4
(1) Observe the Y OUT waveform at the measuring point (D).
(2) Record the signal (A2) in the S-VHS SP mode, and play
back the recorded signal.
(3) Press the channel buttons (+, –) simultaneously to enter
the manual tracking mode. This also brings tracking to
the center (centre).
(4) Set the VCR to the EVR mode by transmitting the code
(F1) from the Jig RCU.
(5) Set the EVR address to (F2) by pressing the button of
the digit-key remote controller.
(6) Adjust with the channel buttons (+, –) on the VCR (or on
the remote controller) so that the Y level of the Y OUT
waveform becomes the specified value (G).
(7) Release the EVR mode of the VCR by transmitting the
code (F1) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
(8) Repeat steps (2) to (7) in the VHS SP mode.
Fig. 3-3-4a PB Y level
H. rate
1.00
±
0.05 Vp-p
Y level
3.3.4 PB Y level (S-VHS/VHS)
Signal
(A1)
• Ext. input
(A2)
• Color bar signal [NTSC]
Mode
(B1)
• S-VHS/VHS
(B2)
• REC (SP)
¥
PB
Equipment
(C)
• Oscilloscope
Measuring point
(D)
• Y OUT terminal (75
Ø
terminated)
EVR mode
(F1)
• Jig RCU: Code “57”
EVR address
(F2)
• A:11 (Press remote controller
“1” key twice)
Specified value
(G)
• 1.00 ± 0.05 Vp-p
Adjustment tool
(H)
• Jig RCU [PTU94023B]
• Digit-key remote controller
3.3.5 Video EQ (Frequency response)
Signal
(A1)
• Ext. S-input
(A2)
• Video sweep signal
Mode
(B1)
• S-VHS
(B2)
• REC (SP/EP)
¥
PB
(B3)
• Picture Control (Smart Picture)
REC: Normal (Natural)
PB: Edit (Distinct)
Equipment
(C)
• Oscilloscope
Measuring point (D)
• Y OUT terminal (75
Ø
terminated)
External trigger
(E)
• TP111 (D.FF)
EVR mode
(F1)
• Jig RCU: Code “57”
EVR address
(F2)
• A:03 (Press remote controller
“0” and “3” keys)
Specified value
(G)
• SP: 2.8 ± 0.3 div. (–3 ± 1 dB)
• EP: 2.8 ± 0.3 div. (–3 ± 1 dB)
Adjustment tool (H)
• Jig RCU [PTU94023B]
• Digit-key remote controller
(1) Apply the external trigger signal to D.FF (E) to observe
the Y OUT waveform at the measuring point (D).
(2) Record the signal (A2) in the S-VHS SP mode, and play
back the recorded signal.
(3) Press the channel buttons (+, –) simultaneously to enter
the manual tracking mode. This also brings tracking to
the center (centre).
(4) Set the VCR to the EVR mode by transmitting the code
(F1) from the Jig RCU.
(5) Set the EVR address to (F2) by pressing the button of
the digit-key remote controller.
(6) Set the 100 kHz marker level of the channel having higher
3.58 MHz marker level of the Y OUT waveform [signal
(A2)] to the “4” scale on the oscilloscope. In this condi-
tion, adjust with the channel buttons (+, –) on the VCR
(or on the remote controller) so that the 3.58 MHz marker
level reaches the specified value (G).
(7) Release the EVR mode of the VCR by transmitting the
code (F1) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
(8) Repeat steps (2) to (7) in the S-VHS EP mode.
Fig. 3-3-5a Video EQ (Frequency Response)
100 kHz
Four scale
1 MHz 2 MHz
3.58 MHz
5 MHz
SP: 2.8
±
0.3 div.
EP: 2.8
±
0.3 div.
V. rate
Scale 4
(4 div.)
(10) After adjustment, record the signal (A3) then playing it
back again. At this time, confirm that there is no invert-
ing phenomenon or noise appearing on the playback
screen.
(11) Release the EVR mode of the VCR by transmitting the
code (F1) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
(12)Repeat steps (3) to (11) in the S-VHS EP mode.
Note:
•
After adjusting, always perform the confirmation and
re-adjustment of the item 3.4.1.
Fig. 3-3-3b REC color (colour) level
“B”
⳯
125
ⴣ
5%(SP)
V. rate
“B”
⳯
125
ⴣ
5%(EP)
3.3.6 AUTO PICTURE initial setting
Signal
(A1)
• Ext. input
(A2)
• Video: Optional
(A3)
• VHS tape
Mode
(B)
• EE
¥
Auto adjust (SP/EP REC
¥
PB)
Adjustment part
(F)
• Jig RCU : Code “58”
Specified value
(G)
• STOP mode
Adjustment tool
(H)
• Jig RCU [PTU94023B]
(1) Insert the cassette tape (A3).
(2) Set the VCR to the Auto adjust mode by transmitting the
code (F) from the Jig RCU. When the VCR enters the
stop mode, the adjustment is completed. When the VCR
enters the eject mode, repeat steps (1) to (2) again.
