Panasonic PVD4742 - DVD/VCR DECK, Service Manual

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4.1.16. BLACK SCREWS ON THE CHASSIS
Black Screws are used on the Mechanism Chassis to identify screws that require adjustment.
4.1.17. HOW TO RESET ALL MEMORY FUNCTIONS
To reset (clear) the select language, channel auto set and set clock functions to their initial
power on condition (power on, no cassette inserted), hold down the PLAY and CH UP buttons
on the unit together for more than 5 seconds.
Power will shut off.
4.1.18. HOW TO CONFIRM AUTO CLOCK SET FEATURE
1. Connect an RF cable from the output of one unit to the input of
the test unit.
2. Select corresponding RF channels.
3. Playback a recording of P.B.S. channel including clock set data
and confirm this feature.
4.1.19. VARIABLE VOLTAGE ISOLATION TRANSFORMER
An Isolation Transformer should always be used during the servicing of DVD VCR whose
chassis is not isolated from the AC power line. Use a transformer of adequate power rating as
this protects the technician from accidents resulting in personal injury from electrical shocks. It
will also protect DVD VCR from being damaged by accidental shorting that may occur during
servicing.
Also, when troubleshooting the above type of Power Supply Circuit, a variable isolation
transformer is required in order to increase the input voltage slowly.
4.1.20. SPECIAL NOTE
All integrated circuits and many other semiconductor devices are electrostatically sensitive and
therefore require the special handling techniques described under the
"ELECTROSTATICALLY SENSITIVE (ES) DEVICES" section of this service manual.
5. DISASSEMBLY/ASSEMBLY PROCEDURES
5.1. CABINET SECTION
5.1.1. Disassembly Flowchart
Perform all disassembly procedures in the order described in the "Disassembly Flowchart"
shown below. When reassembling, use the reverse procedure.
CAUTION:
Disconnect AC plug before disassembly.
Fig. D1
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