Read Sony HCD-M70 Service Manual online
4
HCD-M70
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
MODEL IDENTIFICATION
– Rear Panel –
– Rear Panel –
SERVICE POSITION
In checking the CD block, prepare jig (extension cable J-2501-
011-B: 1.25 mm Pitch, 19 cores, Length 300 mm).
011-B: 1.25 mm Pitch, 19 cores, Length 300 mm).
Part No.
Model Name
Part No.
AEP and UK models
4-238-716-0
[]
US and Canadian models
4-238-888-0
[]
Singapore model
4-238-889-0
[]
Mexican model
4-239-812-0
[]
Australian model
4-240-890-0
[]
Korean model
4-240-891-0
[]
Thai model
4-240-892-0
[]
Connect jig (extension cable J-2501-011-B)
to the control board (CN805) and CD board (CN101).
to the control board (CN805) and CD board (CN101).
control board (CN805)
CD board (CN101)
Any box to put.
In checking the tape deck section, prepare jig (extension cable J-
2501-167-A: 1.25 mm Pitch, 17 cores, Length 300 mm).
2501-167-A: 1.25 mm Pitch, 17 cores, Length 300 mm).
TC board (CN301)
main board (CN301)
Connect jig (extension cable J-2501-167-A)
to the main board (CN301) and TC board (CN301).
to the main board (CN301) and TC board (CN301).
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