JVC DR-MV1SUC Service Manual page 14

4.3.2.2 EE Y level
Signal (A1) • Ext. input
(A2) • Color (colour) bar signal
Mode (B) • EE
Equipment (C) • Oscilloscope
Measuring point (D) • Y OUT (S terminal)
EVR mode (F1) • Jig code "95"
EVR address (F2) • "ADJUST02 : **"
(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) Observe the Y OUT waveform at the measuring point (D).
(2) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(3) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(4) 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).
(5) 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.)
H. rate
Fig.4-3c EE Y level
4.3.2.3 EE COMPONENT PB/CB level
Signal (A) • Internal color bar
Mode (B) • EE
Equipment (C) • Oscilloscope
Measuring point (D) • COMPONENT PB/CB terminal
EVR mode (F1) • Jig code "95"
EVR address (F2) • "ADJUST06 : **"
(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) Observe the CB OUT waveform at the measuring point (D).
(2) Set the VCR to the EVR mode by transmitting the code (F1)
from the Jig RCU.
(3) Set the EVR address to (F2) by transmitting the code (F3)
from the Jig RCU.
(4) 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).
(5) 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.)
1-14 (No.YD006)
4.3.3 Syscon circuit
Notes:
• When perform this adjustment, remove the Mechanism
assembly.
4.3.3.1
Signal
Mode
Equipment
Measuring point (D1)
Adjustment part (F)
Specified value (G)
(1) Connect the frequency counter to the measuring point
(D1).
(2) Connect the short wire between the short point (D2) and
Vcc (5V).
(3) Short the leads of capacitor (D3) once in order to reset
the microprocessor of the Syscon.
Y level
(4) Disconnect the short wire between the short point (D2)
and Vcc then connect it again.
(5) Adjust the Adjustment part (F) so that the output frequency
becomes the specified value (G).
Fig.4-3d EE component PB/CB level
Timer clock
(A) • No signal
(B) • EE
(C) • Frequency counter
• IC3001 pin 61
(D2) • IC3001 pin 24
(D3) • C3026 + and -
• C3025 (TIMER CLOCK)
• 1024.008 ± 0.001 Hz
(976.5549 ± 0.0010 usec)
PB/CB level