5-28
4-7.
PREPARATION FOR ADJUSTMENT AND TAPE PATH CHECK
Preparation before adjustment (connection and setting)
1.
Mount the mechanism deck in the main unit.
(Connect all the connectors.)
2.
Clean the tape running side.
(Refer to “5-1-2. Periodic check”.)
3.
Connect an oscilloscope to RP-234 board CN201 via the CPC-
13 jig (J-6082-388-A)(J-18).
Channel 1: RP-234 board, CN201 Pin
8
(Note)
External trigger: RP-234 board, CN007 Pin
6
Note:
Connect a 75
Ω
resistor between pins
8
of CN007 and
7
(GND).
75
Ω
resistor (Parts code: 1-247-804-11)
4.
Connect the adjustment remote commander (J-8) to the
CONTROL jack (LANC jack).
5.
Turn the HOLD switch of the adjustment remote commander
to the ON position.
6.
Select page: 3, address: 33, set data: 08 and press the PAUSE
button.
7.
Select page: 3, address: 26, set data: 31 and press the PAUSE
button.
Procedure after operations
1.
Connect the adjustment remote commander to the CONTROL
jack (LANC jack).
2.
Turn the HOLD switch of the adjustment remote commander
to the ON position.
3.
Select page: 3, address: 33, set data: 00 and press the PAUSE
button.
4.
Select page: 3, address: 26, set data: 00 and press the PAUSE
button.
Tape path check (checking the RF waveform)
Play back the tracking tape (J-6) and check the states at the en-
trance and exit of the RF waveform. If it is not flat at either side,
perform the adjustments from Adjustment Start-4 in the flowchart
on page 5-23.
Normal entrance and exit sides
Faulty entrance side
Faulty exit side
XH2-1
CH1
EXT
TRIG
Oscilloscope
Connect to pin 8
Connect to pin 6
Pin No.
Signal name
RF MONITOR
GND
JSWP
8
7
6
Connect to pin 7
Rear panel
75
Ω
resistor Connect to pin 8
CN201
RP-234 board
RP-234 board
DECK
CPC-8 jig (J-18)
Adjustment
remote commander
(J-8)