Sony ICD-80 Service Manual ▷ View online
MICROFILM
SERVICE MANUAL
IC RECORDER
US Model
SPECIFICATIONS
ICD-80
Ver 1.0 1998. 07
– 2 –
TABLE OF CONTENTS
1.
SERVICING NOTES
...............................................
2
2.
GENERAL
...................................................................
3
3.
DISASSEMBLY
.........................................................
4
4.
DIAGRAMS
4-1. Block Diagram ................................................................
5
4-2. Schematic Diagram .........................................................
8
4-3. Printed Wiring Board ...................................................... 11
4-4. IC Pin Function Description ........................................... 16
4-4. IC Pin Function Description ........................................... 16
5.
EXPLODED VIEW
................................................... 19
6.
ELECTRICAL PARTS LIST
............................... 20
SECTION 1
SERVICING NOTES
CAUTION ON REPLACING FLASH MEMORY
The BAD-BLOCK check* must be executed, when the flash
memory in this set was replaced.
The set will not operate normally, unless this check is finished.
memory in this set was replaced.
The set will not operate normally, unless this check is finished.
* The BAD-BLOCK check detects an area (bad-block) in the flash
memory where data validity cannot be guaranteed, and saves
this information in the TOC-AREA so that a bad-block is not
used.
this information in the TOC-AREA so that a bad-block is not
used.
BAD-BLOCK Check Procedure:
1. Apply 3.0 V from regulated power supply to the battery termi-
1. Apply 3.0 V from regulated power supply to the battery termi-
nals.
(The battery lid open/close detection switch S701 may be kept
off)
(The battery lid open/close detection switch S701 may be kept
off)
2. Red LED and green LED light up.
3. As “Push St & Er” is displayed on the LCD, press the STOP
3. As “Push St & Er” is displayed on the LCD, press the STOP
(S703) button and the ERASE (S702) button simultaneously.
(BAD-BLOCK check will start)
(BAD-BLOCK check will start)
4. “Bad Check” is displayed on the LCD. (Check will last for
about 90 sec, and keep applying regulated power supply dur-
ing checking)
ing checking)
5. Backlight turns on (BAD-BLOCK check finished successfully)
(*)
Red and green LEDs turn off. “Good OK!” is displayed on
the LCD.
(*): In case of NG, “Bad Memory” is displayed on the LCD.
Red and green LEDs turn off. “Good OK!” is displayed on
the LCD.
(*): In case of NG, “Bad Memory” is displayed on the LCD.
6. Press the RESET (S501) button.
Note:
• In case of NG, check the System Control IC, Memory IC, and
their peripheral circuits. (Particularly, check carefully the sol-
dering of the flash memory)
dering of the flash memory)
• After finishing the BAD-BLOCK check, assemble the set, load
the battery, and confirm if the set operates normally.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
– 3 –
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
– 4 –
BATTERY CASE LID, MAIN BOARD
Note:
Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
1
battery case lid
A
2
tapping screw
(B1.7)
(B1.7)
7
case block assy
3
upper lid block assy
4
MAIN board
5
two screws
(M1.7
(M1.7
×
2.5)
6
switch unit
Pull the battery case lid toward
direction
direction
A
, remove it.