JVC GRD40EX
Instrukcja Serwisowa

3.4 MECHANISM COMPATIBILITY ADJUSTMENT 3.4.1 Tape pattern check (1) Connect the JIG CONNECTOR CABLE to the set. As for the connection procedure, JIG CONNECTOR BOARD and see 3.5 ELECTRICAL ADJUSTMENT. (2) Remove the COVER(ADJUST) (3) Play back the compatibility adjustment tape. (4) While triggering the HID1, observe the waveform of ENV_OUT. (5) Confirm that the waveform is free from remarkable leveldown, and entirely parallel and straight. (6) In case any level-down is observed on the left hand side, straighten the level by turning the GUIDE ROLLER (SUP) of the POLE BASE ASSEMBLY. In case any level-down is observed on the right hand side, however, straighten the level by turning the GUIDE ROLLER(TU) of the POLE BASE ASSEMBLY. (7) After adjustment, try the unloading motion once, and confirm that the waveform is flat (straight) when the tape has been played back again. Moreover, perform readjustment as required. (8) When the recording has been played back again, play back the self-recording to confirm that the waveform is flat.

ENV_OUT

HID1

Fig.3-4-1

Flatten the waveform. Misalignment of guide roller height on the supply side Misalignment of guide roller height on the take-up side

Fig.3-4-2

GUIDE ROLLER (SUP)

GUIDE ROLLER (TU)

COVER (ADJUST) JIG CONNECTOR CABLE
Refer To 3.3
JIG CONNECTOR
TO JLIP_RX RED TO JLIP_TX WHITE TO GND BLACK

COMMUNICATION CABLE

JIG CONNECTOR

OSCILLOSCOPE

TO ENV_OUT TO HID1

Fig.3-4-3

(No.86730)1-21