Philips HQ3865/B, HQ3465/B, HQ4845/B, HQ4885/B free download

File name NiCd_shavers_®_.pdf

NUDOS NiCd Shavers Service Service Service Domestic Appliances and Personal Care HQ 3865/B HQ 4845/B HQ 4865/B HQ 4885/B Circuit Description INTRODUCTION HINTS FOR REPAIRS a. Disassembly - Remove the shaving unit, to prevent damages during repairs. - Remove screws A1 (4X, of which 2 are under trimmer slide). - Put the shaver on the table and remove the cover (item 26) from the shaver. - The trimmer can be removed by pushing the hinge points (`Y' in exploded view, near item 11) slightly inwards. - Detach the motor clamping springs (item 18) on the bearing block with a small screwdriver. - The PC-boards with motor can now be removed from the housing. - Remove screws A2 (2X). - Unlock the snap connection (3X) between frame (item 14) and hair chamber (item 11). - If the Power Module (item 23) and Time Control Module (item 7) have to be separated, read the instructions under IMPORTANT. b. Assembly - The assembly must be carried out in reverse order of what is described under a. Disassembly. - The trimmer slide can be snapped into the cover last. The Nudos shavers with NiCd cells can be recharged in 30 minutes by means of a Fly Back Self Oscillating Power Supply (SOPS). This electronic circuit enables cells to be recharged at 100-240 V . It is possible to shave directly from the mains, provided the voltage exceeds 100V . The on/off slide has a locking device, which prevents the shaver from being switched on accidentally. Leaving it connected to the mains after it is fully charged will not damage the shaver. However, the life of the cells may be shortened if the shaver is kept permanently connected. If the shaver is kept in the case when charging, make sure that the lid is open to prevent overheating. Published by Philips Domestic Appliances and Personal Care Printed in The Netherlands © Copyright reserved Subject to modification 4822 729 22107 97/04 - 99/01 PCS 99 106 NUDOS NiCd shavers TECHNICAL DESCRIPTION 100-240 V 50/60Hz R1 L1 D4 C1 C2 D1 C3 D2 D3 A 2 x AA NiCd T1 2 The electronics for the Nudos shavers with NiCd cells consist of 2 modules: a Power Module (PM) and a Time Control Module (TCM), connected via a 5-pin connector. 1 2 3 4 5 6 7 8 9 C5 C6 IC1 18 17 16 15 14 13 12 11 10 R5 POWER MODULE C4 R7 R8 R12 R9 R10 R14 TS1 TEA 1402 The PM consists of a High Voltage Integrated Circuit (HVIC) and some external components, regulating the following functions: a. a current controller to adjust the charge current at 1200 mA or at 100 mA. b. a 2.5 V dynamic supply controller for shaving from the mains. c. a primary current limiter (max 400 mA) to protect the transformer from saturation. d. a frequency limiter (max 60 kHz). e. an open cell protection (Vbat>5V). f. a temperature protection (Tchip>140°C). The mains voltage is full-wave rectified by D4 and smoothed by -filter C1-L1-C2. This filter also serves as a radio interference filter (RIF) for the SOPS and motor and as a suppressor of voltage transients from the mains. Resistor R1,