Electrical Adjustments; Basic Adjusment; Switching Point; Electrical Adjustment Parts Location Guide - JVC HR-XVC21UJ Service Manual

Read and perform this adjustment when repairing the
circuits or replacing electrical parts or PCB assemblies.
1. BASIC ADJUSTMENT
CAUTION
When you exchange IC and Transistor for a heat sink,
apply the silicon grease (YG6260M) on the contact section
of the heat sink. Before applying new silicon grease,
remove all the old silicon grease. (Old grease may cause
damages to the IC and Transistor.)

1-1: SWITCHING POINT

CONDITIONS
MODE-PLAYBACK
Input Signal-Alignment Tape (MHP)
INSTRUCTIONS
1. Connect CH-1 on the oscilloscope to TP3002 and CH-2
to TP8001.
2. Playback the alignment tape. (MHP)
3. Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
4. Press both CH UP button on the set and the STOP button
on the set for more than 2 seconds.
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (Connector Connections)
J8001
CP103
FE HEAD
TP101
TP3002
TP101
: Envelope
TP3001
: Service Mode
TP3002 : Switching Pulse
TP8001 : Switching Point
1-22

ELECTRICAL ADJUSTMENTS

VCR PCB
TP8001
TP3001
CP102
AC HEAD
V651
CP681
OPERATION PCB
AC IN
CD501
CD8002
CP8002
CP4002
CP501
CP651
DVD DECK
CD681
6.5H
6.5H
CP8102
CP2601
CP2603
CP2602
DVD PCB
CD2001
CH-2
CH-1
Fig. 1-1-A
CH-2
CH-1
Fig. 1-1-B