Sony MHC-V50 Service Manual page 5

Note
• JIG
When disassembling the set, use the following jig (for front
panel removal).
Part No.: J-2501-238-A JIG FOR SPEAKER REMOVAL
NOTE OF REPLACEMENT OF THE MS-476 BOARD
When the MS-476 board is defective, exchange the entire CDM90
ASSY.
NOTE OF REPLACEMENT OF THE SENSOR BOARD
When the SENSOR board is defective, exchange the SERVICE,
TOP PANEL ASSY.
TEST DISCS
Use following TEST DISC when this unit confi rms the operation
and checks it.
• For CD
Part No. Description
3-702-101-01 DISC (YEDS-18), TEST
4-225-203-01 DISC (PATD-012), TEST
J-2501-307-A DISC (HLX-A1), TEST
• For DVD SL (Single Layer)
Part No. Description
J-6090-069-A DISC (HLX-503), TEST (NTSC)
J-6090-088-A DISC (HLX-504), TEST (NTSC)
J-2501-305-A DISC (HLX-513), TEST (NTSC)
J-6090-077-A DISC (HLX-506), TEST (PAL)
• For DVD DL (Double Layer)
Part No. Description
J-6090-071-A DISC (HLX-501), TEST (NTSC)
J-6090-089-A DISC (HLX-505), TEST (NTSC)
J-2501-306-A DISC (HLX-514), TEST (NTSC)
J-6090-078-A DISC (HLX-507), TEST (PAL)
If "PROTECTX" (X is a number)
appears on the display
Immediately unplug the AC
power cord (mains lead), and
check if anything is blocking the
ventilation openings of the unit.
After you have checked and
found no problems, reconnect
the AC power cord (mains lead),
and turn on the system. If the
issue persists, contact your
nearest Sony dealer.
Protect Type Description:
X (Error Code)
2 Defect of thermistor IC or charging circuit
used by SPM (Sound Pressure Management)
system.
3 There is possibility of over current happen at
speaker output.
or
Unusual heat up of AMP IC by improper as-
sembly of heat sink.
DC appears in SP terminal by defect of AMP
4
IC.
6 Defect of DC FAN and DC FAN driver circuit.
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
It can release the lock function in the following procedure.
Releasing Procedure:
1. Press [ ] button to turn the power on.
1
2. Touch the [FUNCTION] touch key until the message "DVD/
CD" is displayed.
3. Touch the [ENTER] and [VOCAL FADER] touch keys
simultaneously and hold down for around 3 seconds.
4. The message "UNLOCKED" is displayed and the disc tray is
unlocked.
" "
Note: When LOCKED is displayed, the disc tray lock is not released by
turning power on/off with the
NOTE OF REPLACING THE IC2002 AND IC2003 ON
THE DAMP BOARD AND THE COMPLETE DAMP
BOARD
When IC2002 and IC2003 on the DAMP board and the complete
DAMP board are replaced, it is necessary to spread the compound
between parts and heat sink.
Part No. Description
7-300-009-67 THERMAL COMPOUND (TIG2000)
Spread the compound referring to the fi gure below.
– DAMP Board (Component Side) –
thermal compound (TIG2000)
thermal compound (TIG2000)
MHC-V50/V50D
Description
[ ]
button.
1
IC2003
IC2002
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