JVC HM-DH40000K Service Manual page 35

(3) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(4) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(5) Transmit the code (F4) from the Jig RCU to adjust so that
the Y level of the Y OUT waveform becomes the specified
value (G).
(6) Release the EVR mode of the VCR by transmitting the
code (F5) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
Fig.4-3-1a
4.3.2 EE Y (S-VHS) level
Signal (A1) • Ext. input
(A2) • Color (colour) bar signal [NTSC]
(A3) • S-VHS
Mode (B) • EE
Equipment (C) • Oscilloscope
Measuring point (D) • Y OUT (S terminal)
EVR mode (F1) • Jig code "95"
EVR address (F2) • "02 : **"
(F3) • Jig code "22"
(F4) • Jig code "18" or "19" (Channel +/-)
(F5) • Jig code "3C"
Specified value (G) • 1.00 ± 0.02 Vp-p (terminated)
Adjustment tool (H) • Jig RCU [PTU94023B]
(1) Insert the cassette tape (A3) to enter the mode (B).
(2) Observe the Y OUT waveform at the measuring point (D).
(3) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(4) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(5) Transmit the code (F4) from the Jig RCU to adjust so that
the Y level of the Y OUT waveform becomes the specified
value (G).
(6) Release the EVR mode of the VCR by transmitting the
code (F5) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
Fig.4-3-2a
4.3.3 EE Y (VHS) level
Signal (A1) • Ext. input
(A2) • Color (colour) bar signal [NTSC]
(A3) • VHS
Mode (B) • EE
Equipment (C) • Oscilloscope
Measuring point (D) • TP501 (Y TO SE) [Main board]
Y level
Y level
H. rate
EVR mode (F1) • Jig code "95"
EVR address (F2) • "03 : **"
(F3) • Jig code "23"
(F4) • Jig code "18" or "19" (Channel +/-)
(F5) • Jig code "3C"
Specified value (G) • 0.40 ± 0.02 Vp-p
Adjustment tool (H) • Jig RCU [PTU94023B]
(1) Insert the cassette tape (A3) to enter the mode (B).
(2) Observe the Y OUT waveform at the measuring point (D).
(3) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(4) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(5) Transmit the code (F4) from the Jig RCU to adjust so that
the Y level of the Y OUT waveform becomes the specified
value (G).
(6) Release the EVR mode of the VCR by transmitting the
code (F5) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
Fig.4-3-3a
4.3.4 SD EE COMPONENT CB level
Signal (A1) • Internal color bar
(A2) • S-VHS
Mode (B) • EE
Equipment (C) • Oscilloscope
Measuring point (D) • COMPONENT PB/CB terminal
EVR mode (F1) • Jig code "95"
EVR address (F2) • "06 : **"
(F3) • Jig code "26"
(F4) • Jig code "18" or "19" (Channel +/-)
(F5) • Jig code "3C"
Specified value (G) • 0.70 ± 20 Vp-p (terminated)
Adjustment tool (H) • Jig RCU [PTU94023B]
(1) Insert the cassette tape (A2) to enter the mode (B).
(2) Observe the CB OUT waveform at the measuring point (D).
(3) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(4) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(5) Transmit the code (F4) from the Jig RCU to adjust so that
the CB level of the CB OUT waveform becomes the speci-
fied value (G).
(6) Release the EVR mode of the VCR by transmitting the
code (F5) from the Jig RCU again. (When the EVR mode
is released, the adjusted data is memorized.)
Fig.4-3-4a
Y level
H. rate
PB/CB level
(No.82933)1-33