Adjustment Procedures; Disassembly Method; Disassembly Flow Chart - Panasonic NV-SJ422EE Service Manual

INDICATION
01
02
03
04
06
07
08
16
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18
2*

3. ADJUSTMENT PROCEDURES

3.1. DISASSEMBLY METHOD

3.1.1. DISASSEMBLY FLOW CHART

This flow chart indicates disassembly steps of the cabinet parts and the circuit boards in order to find the
necessary items for servicing.
When reassembling, perform the steps in the reverse order.
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After cylinder lock is detected, the cylinder does
not start rotating again even after tape unloading.
Cassette tape is not wound up during the tape
unloading except EJECT mode.
Mechanism locks during mode transition except
EJECT mode.
Mechanism locks during tape unloading.
Mechanism locks after tape unloading in EJECT
mode.
During recording mode, recording signal is less
than the normal condition.
Recording circuit works except recording mode.
Cylinder lock detection.
Supply reel mechanism lock detection
Take-up reel mechanism lock detection
PG shifter automatic adjustment error.
Fig. T1 Self-Test indication Display
CAUSE
Fig. D1
REMEDY/CHECK
Check the cylinder motor drive circuit.
Check the capstan motor drive circuit.
1. Check the loading motor drive circuit.
2. Check the mechanism phase alignment.
3. Check the mode switch.
1. Check the loading motor drive circuit.
2. Check the mechanism phase alignment.
1. Check the loading motor drive circuit.
2. Check the mechanism phase alignment for cassette holder un
Protection of the over-current flowing in transis
which produces the power supply for recording
mode.
Check the recording circuit.
Check the cylinder unit and the cylinder motor
drive circuit.
Check the supply reel mechanism and the sup
reel circuit.
Check the Take-up reel mechanism and the
Take-up reel circuit.
Check the servo/system control circuit and the
cylinder unit.