Adjustment Procedures - JVC AX-242BK Service Manual

AX-242BK
Adjustment Procedures
Idling Adjustment
R773
OO
R774
© O
Lig
ENH-126-1
1. Set the volume control to minimum during this adjustment.
2. Turn R751 and R752 fully counterclockwise before switching power on.
3. Always start from cold, and allow at least 10 minutes to warm up before adjustment.
4. Connect a DC voltmeter to R773(® &@®) for left channel or R774(© &@) for right.
5. Adjust R751 for left or R752 for right,so that the DC voltmeter becomes 11mV + 5mV.
Internal Block Diagram of ICs
@ TA7317P (1C901) : Protector
Muting IN Vee
u Power ON/OFF
a s
Detector
t Relay
' Drive
Power ON/OFF I Over Current OUT
Relay Drive
'
Load Short IN i Detector
i
1
Substrate
DC Detect |
IN
----4
Discharge IN Substrate
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