Service manual

4
HCD-NEZ30
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S820. (push switch type)
The following checking method for the laser diode is operable.
• Method
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S820 as shown in Fig.1.
Note: Do not push the detection lever strongly, or it may be bent or damaged.
3. Press the u button.
4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
In this operation, the object lens will move up and down 2
times along with inward motion for the focus search.
Fig.1 Method to push the S820
S820
Ver. 1.5
MODEL IDENTIFICATION
– Rear View –
Model Name Part No.
E model 2-665-907-0[]
Mexican model 2-665-908-0[]
Chilean and Peruvian models 2-665-909-0[]
Argentina model 2-665-910-0[]
US and Canadian models 2-665-913-0[]
UK model 3-100-772-0[]
East European model 3-312-856-0[]
Part No.
NOTE WHEN PARTS RELATED TO POWER
TRANSFORMER ARE REPLACED
In this set, the main power transformer (T902) and sub power
transformer (T901) of US and Canadian models have been changed
in the midway of production.
The mount parts on DC board and Part No. of DC board have been
changed along with it.
Perform after confirming which type set when you repair set because
there is a suited combination.
• DISCRIMINATION
Distinguish by the print of label pasted to side of main power
transformer (T902).
– MAIN POWER TRANSFORMER (T902) –
• Combination
TYPE A TYPE B
POWER 1-443-902-11 1-443-903-11
TRANSFORMER TRANSFORMER, TRANSFORMER,
(T902) POWER POWER
T901 1-443-833-11 1-443-846-11
(on AC board) TRANSFORMER, TRANSFORMER,
POWER POWER
D921 NO MOUNT 6-501-193-01
(on DC board) DIODE 1SS355WTE-17
R911 1-216-841-11 1-216-829-11
(on DC board) METAL CHIP METAL CHIP
47K 5% 1/10W 4.7K 5% 1/10W
R912 1-216-841-11 1-216-845-11
(on DC board) METAL CHIP METAL CHIP
47K 5% 1/10W 100K 5% 1/10W
R920 NO MOUNT 1-216-864-11
(on DC board) SHORT CHIP 0
DC board A-1158-136-A A-1216-850-A
1-443-902-11: TYPE
A
1-443-903-11: TYPE
B