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For internal use only PHILIPS
ISSUE SNL2000.05 (00-06-09)
Published by:
Service Depar tment Audio
BUSINESS CREATION UNIT AUDIO
05.01 TYPENUMBER(S): AJ3935
SYMPTOM :
Transformer hum is audible.
CURE : The hum is caused by vibration of the metal transfor mer bracket (item
502). For service purpose the metal bracket can be removed without
substitution.
REMARKS : In production, a rubber foam of 20 x 25 x 26 mm will be placed
between top of transformer and Top Cabinet (item 427).
This will protect the printed board from being damaged during transit.
The modification has been implemented in production from week
0014 onwards.
05.02 TYPENUMBER(S): AZ1005, AZ1007
INFORMATION : Due to supply shortfall of servo IC TDA7073A, the CD module had to
be redesigned for IC TCA0372DP1. The new modules are used in
production alternatively.
For repair infor mation on new CD modules see Service Information
A00-551 (3140 785 22310).
REMARKS : Alternative CD modules are used in production from week 0013
onwards.
05.03 TYPENUMBER(S): AZ1100, AZ1101, AZ1102, AZ1103, AZ1104
INFORMATION : Due to supply shortfall of servo IC TDA7073A, the CD module had to
be redesigned for IC TCA0372DP1. The new modules are used in
production alternatively.
For repair infor mation on new CD modules see Service Information
A00-552 (3140 785 22320).
REMARKS : Alternative CD modules are used in production from week 0013
onwards.
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SERVICE NEWSLETTER
Service Newsletter 2000 – BCU Audio 1/4
Page 2
05.04 TYPENUMBER(S): AZ1110, AZ1111, AZ1112, AZ1113, AZ1114
INFORMATION : Due to supply shortfall of servo IC TDA7073A, the CD module had to
be redesigned for IC TCA0372DP1. The new modules are used in
production alternatively.
For repair infor mation on new CD modules see Service Information
A00-553 (3140 785 22330).
REMARKS : Alternative CD modules are used in production from week 0013
onwards.
05.05 TYPENUMBER(S): AZ1116, AZ1117, AZ1118, AZ1119
INFORMATION : Due to supply shortfall of servo IC TDA7073A, the CD module had to
be redesigned for IC TCA0372DP1. The new modules are used in
production alternatively.
For repair infor mation on new CD modules see Service Information
A00-555 (3140 785 22360).
REMARKS : Alternative CD modules are used in production from week 0013
onwards.
05.06 TYPENUMBER(S): AZ2750, AZ2755
INFORMATION : Due to supply shortfall of servo IC TDA7073A, the CD module had to
be redesigned for IC TCA0372DP1. The new modules are used in
production alternatively.
For repair infor mation on new CD modules see Service Information
A00-554 (3140 785 22340).
REMARKS : Alternative CD modules are used in production from week 0014
onwards.
Service Newsletter 2000 – BCU Audio 2/4
Page 3
05.07 TYPENUMBER(S): CDR785/17
SYMPTOM :
The Standby-LED is inoperative.
The power consumption in standby is higher than specified an close
to the power consumption is STOP-mode.
CURE : The problem is caused by the fishplate holding the Power Supply
Unit. In some cases the fishplate can touch a copper track of the
Power Board close to resistor R204 (see picture below).
This will short-circuit par ts of the power supply circuitry to the ground
potential of the bottom frame.
As a result, the display will switch off, but the LED does not light.
Solution: Place an insulating layer (i.e.friction tape or piece of Fuller
board) between printed board and holder.
REMARKS : The green protection lacquer on the printed board normally ensures
proper insulation of copper tracks.However, due to transpor tation or
rough handling, the critical area can get exposed.
In production, the bottom frame has been modified.
The modified parts are used from week 0020.4 onwards.
05.08 TYPENUMBER(S): FW830C, FW840C, FW870C, FW878C, FW890P, FW898W
INFORMATION : Additional information to Service Newsletter items AS99.08.03 and
AS99.10.02:
The reliability of EEPROM data can be improved further by changing
the value of resistor 3611 to 2.2kΩ 5% 0.1W (4822 117 11449).
REMARKS :
05.09 TYPENUMBER(S): MC118
INFORMATION : Correction to Service Manual, partslist
The codenumber of the CD Door Switch (item 1025) is missing.
The switch is available with codenumber 4822 276 13963.
REMARKS :
short-circuit in this area
shape of
fishplate
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Service Newsletter 2000 – BCU Audio 3/4
Page 4
05.10 TYPENUMBER(S): MZ-3, MZ-33
SYMPTOM :
No sound output, resistor 3363 is blown.
CURE : • Change resistor 3363 from 22Ω to a 10Ω NFR-type
(4822 052 11109)
• Change capacitor 2362 from 100µF to 22µF (4822 124 81151)
REMARKS : The modification has been implemented in production from week
0018 onwards.
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Service Newsletter 2000 – BCU Audio 4/4
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