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For internal use only PHILIPS
ISSUE PA99.01 (99-03-18)
Published by:
Service Depar tment Portable Audio
LINE OF BUSINESS PORTABLE AUDIO
01.01 TYPENUMBER(S): AQ6581
SYMPTOM :
Tape sound is distorted near strong electro-magnetic fields.
CURE : Problem can be solved by connecting two 390pF ceramic capacitors
(4822 122 32121) from pins 6 and 23 to pin 10 (ground) of IC
LAG668.
REMARKS :
01.02 TYPENUMBER(S): AZ1015
INFORMATION : Correction to the Electrical Partslist:
The service codenumbers of the Mains transformers have been
mixed up.They should read:
4822 146 10877 for /00 and /14 versions
4822 146 11118 for /01 version
4822 146 10876 for /17 version
REMARKS :
01.03 TYPENUMBER(S): AZ1025
INFORMATION : In order to increase the tuner output power, following parts have been
changed on the Audio Board:
• Resistors 3307 and 3308 changed to 150Ω (4822 116 83868)
• Resistors 3595 and 3596 changed to 27kΩ (4822 116 52264)
• Resistors 3597 and 3598 replaced by jumpers
REMARKS : Modification has been implemented from production start onwards.
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SERVICE NEWSLETTER
Service Newsletter 1999 – Portable Audio 1/3
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01.04 TYPENUMBER(S): AZ1200, AZ1202, AZ1203, AZ1205, AZ1207, AZ1208, AZ1209
SYMPTOM :
No display in CD mode at low battery voltage.
CURE : Problem can be solved by changing resistor 3251 from 470Ω to 390Ω
(4822 116 83881).
REMARKS : Modification has been implemented in production from week 9850
onwards.
01.05 TYPENUMBER(S): AZ1202
INFORMATION : Correction to the Mechanical Partslist:
The service codenumber of the Knob-Open (item 439) for Silver
versions should read 4822 410 11392.
REMARKS :
01.06 TYPENUMBER(S): AZ1205, AZ1207
SYMPTOM :
Volume setting is reset to level “11” when power is switched off.
CURE : Problem can be solved by changing capacitor 2401 from 100µF to
47µF (4822 124 81286).
REMARKS : Modification has been implemented in production from week 9901
onwards.
01.07 TYPENUMBER(S): AZ8310, ND7600
INFORMATION : In course of production the potentiometers VR1, VR4, VR5 and VR6
have been changed.The new potentiometers are available via
following service codenumbers:
VR1 : 4822 101 11373
VR4 to VR6 : 4822 105 11133
REMARKS : The potentiometers can be distinguished by their pin layout:
Old potentiometers : 4 pins in 1 row
New potentiometers : 4 pins in 2 rows
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X31CIRIS CODE
Service Newsletter 1999 – Portable Audio 2/3
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01.08 TYPENUMBER(S): MC135, MC136, MC155, MC156
SYMPTOM :
Sound is muted or distorted at star t-up when playing a CD containing
only two tracks.
CURE : The problem can be solved by adding a resistor of 100kΩ
(4822 116 52234) across C445 on the CD board.
REMARKS : Modification has been implemented in production from week 9901
onwards.
01.09 TYPENUMBER(S): MC175
INFORMATION : Correction to the Service Manual, Frontboard:
Following parts have been added/changed from production start
onwards:
• Capacitor 2430 changed from 100pF to 470nF (4822 126 13482)
• Jumper 9440 replaced by resistor 3525, 47Ω (4822 116 52195)
• Resistor 3526, 680kΩ (4822 051 20684) added
• Resistor 3527, 1MΩ (4822 051 20105) added
REMARKS :
235CIRIS CODE
Service Newsletter 1999 – Portable Audio 3/3
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