Vhs) Caution After Replacing Parts; Adjustment Procedures After Replacing Dd; Cylinder, Vhs Micropocessor Or Main P.c.b - Panasonic DMR-EH80VEG Service Manual

18 (VHS) CAUTION AFTER REPLACING PARTS

PG Shifter Automatic Adjustment and X-VALUE & LINEARITY (P2 and P3 Posts) ADJUSTMENT should be performed after
replacing DD Cylinder, EEPROM (IC37502) or Digital I/F P.C.B.
Note:
The "X-VALUE & LINEARITY (P2 and P3 Posts) ADJUSTMENT" is not necessary after only replacement of EEPROM
(IC37502) or Digital I/F P.C.B.
18.1. ADJUSTMENT PROCEDURES AFTER REPLACING DD CYLINDER, VHS
MICROPOCESSOR OR MAIN P.C.B
PG SHIFTER ADJUSTMENT PROCEDURE
Turn on the Service Mode
1.Press the FF key and the EJECT key simultaneously for more than 3 seconds.
Activate the Service Mode 2
2. While keep pressing FF key, press the EJECT key twice.
Activate the Entering Mode.
3. Press the EJECT key for more than 3 seconds.
Set the Mode 2.
4. Press the CH UP key once.
Insert the alignment cassette tape (VFJ8125H3F)
5. The PG Shifter Adjustment starts automatically.
When the sequence of the automatic adjustment has been terminated, the following action has been made.
SUCCEED: The cassette tape is ejected.
ERROR: The"F20", "F21", "F22" or "F23" is displayed.
Refer to next PG Shifter Adjustment Self-Diagnosis Indication Table regarding the details of the indications.
Exit from Service Mode.
6. Press FF and EJECT keys simultaneously in 6 times.
Then the FIP becomes normal indication.
PG SHIFTER AUTOMATIC ADJUSTMENT SELF-DIAGNOSIS INDICATION
F20
F21
F22
F23
NOTE:
When DD Cylinder was replaced, the Tape Interchangeability adjustment (X-Value Adjustment, P2 and P3 Posts Adjustment)
shown below should be performed after the PG Shifter Automatic Adjustment.
PROCEDURE
NG1 in the PG Shifter Automatic Adjustment
(The cylinder rotation is unstable during the automatic adjustment.)
NG2 in the PG Shifter Automatic Adjustment
(The vertical sync signal is lacked while over 5 seconds on the alignment tape.)
NG3 in the PG Shifter Automatic Adjustment
(The installing position of Heads to the cylinder is our of specification.
NG4 in the PG Shifter Automatic Adjustment
(The servo is not locked to the cylinder for more than 10 sec.)
49
DMR-EH80VEG / DMR-EH80VEB
F.I.P. DISPLAY
(Normal Indication)