Philips LFH 9750/00 User manual

Service Manual
Digital
Dictation/Transcription System
LFH 9750/00
A Publication of
Philips Speech Processing
Technical Service/Support Group Vienna
Gutheil-Schoder-Gasse 12
A-1102 Vienna, Austria
Tel. [phone] ext. 1309
Fax [phone]
5122 991 73341
June 2004
Subject to technical modifications. Copyright Philips Austria GmbH, Speech Processing. All rights reserved.
Contents
page
• General Description
Benefits/Features 2
• Operating Instruction 3
• Test mode (FW 2.xx) 4
• Firmware Upgrade 5
• MAC Address 6
• Firmware Upgrade (FW 2.20)
USB Test, Fault codes,
Record/Play back test 7
• Circuit Diagram PCB 1 8
• Circuit Diagram PCB 2 9
• PCB 1 –Side 1 10
• PCB 1 –Side 2 11
• PCB 2 –Side 1, Side 2 12
• Exploded View 13
• Mechanical Partslist 14
• Electrical Partslist 15,16

2
General Description
The LFH 9750 has been designed to offer optimum user convenience and greater
efficiency for the daily work.
This model is a state-of-the-art digital Dictation/Transcription System for the professional
user. Digital transcription allows instant and precise access to any point in the dictation
sound file.
During dictation user-defined information (Keywords) can be stored with the sound file.
Benefits/Features
• Compatible with the Digital Pocket Memo range LFH 9350, LFH 9250, LFH 9220
and LFH 9400.
• Exchangeable Multimedia/SD (Secure Digital) Card for simple, efficient data
transfer, and flexibility when on the move.
• DSS file format: This industry standard file format for digital recording devices offers
minimum file sizes whilst maintaining crystal clear sound quality.
• Voice-Activated Recording for hands-free dictation.
• Insert, overwrite and delete/partial delete functions allow full editing capability and
continuity of dictation.
• Backlit LC-Display makes reading the display in poor lighting conditions easier.
• Two Display settings (standard/advanced) allowing selection which information
should be displayed on the screen (numeric or graphical).
• Adjustable Microphone Sensitivity (3 steps) for conference or close range
recordings.
• Easy, automatic download of dictations (upload of sound files) to your PC via USB
connection.
• USB mass storage device: The Multimedia Card can be used to store data as well
as voice recordings.
• Volume, Tone and Speed controls.
• Automatic backspace function.
• Microphone and Headphone sockets.
• Conference Microphone socket.
• LC-Display shows creation time/date, size of the dictation file and operating mode.
• Warning tone signals low/full memory to avoid dictation loss.
• Standard Play/Long Play modes of recording to suit the user's preferences.
• Support of Microphones LFH 0276/10 and LFH 0278/10 for use as a digital
Dictation System.
• Support of Conference Microphone LFH 0172.
• Support of Foot Control LFH 0210.

3
Operating Instruction (short form)
10.DELETE button
11.LCD (Display)
12.Memory Card slot
13.Storage space for additional memory
cards
14.Jog Dial (for Skip Forward and Skip
Back, accessing the menu and
moving between menu entries)
15.Built-in loudspeaker
16.USB socket (for PC download)
17.Conference microphone socket
(LFH 0172)
18.Microphone socket (LFH 0276/10 or
LFH 0278/10)
19.Foot control socket
20.Headphone socket
21.Power supply socket
1
2
4
3
5678
9
10
11
12
13
14 15
16
17
18
19
20
21
1. Auto-backspace switch (ABS)
2. Speaker selector (built-in LS/Headphones/
Microphone LS)
3. DOWNLOAD button (download to PC)
4. TONE control
5. SKIP/FWD button (Skip Forward/
Fast Forward)
6. VOLUME control
7. STOP/PLAY button
8. SKIP/BACK button (Skip Back/Fast Rewind)
9. SPEED control (for adjusting playback
speed)

4
Test mode (from Firmware version 2.xx onwards)
Switch on the unit by connecting the power supply. To start the Test mode press
DOWNLOAD and DELETE buttons and JOG Dial simultaneously.
First all pixels on the LCD are switched on for a short time. Simultaneously the Warning
tone is audible in the speaker (one peep).
Display shows: VER: 02.20 (e.g. Firmware version 02.20)
LFH: 9750/00 (Model number)
MAC: 00000000 (MAC Address, which is also the Serial number)
(ERR:) ……. (Error, for factory use only)
HIS: ……. (History, for factory use only)
Press any key
After pressing any key all switches (including foot switch), the Jog Dial, the SPEED
control, the ABS switch, the buttons on Microphones LFH 0276/10 or LFH 0278/10, the
CONF MIC socket, the warning tone and the Display Lighting can be checked according
the information given on LCD.
Button/Switch Warning
tone Display Lighting Display Key:
DOWNLOAD ON *) DL
DELETE ON *) DEL
ON *) Backw
STOP/PLAY ON ON *) Play
ON *) Forw
JOG (push) ON *) Jog OK
JOG -ON *) Jog DOWN
JOG + ON *) Jog UP
All Buttons
pressed and ok Last Button pressed
Keys OK
*) 7 sec. Time out
To exit the Test mode disconnect the unit from mains (disconnect power supply).
Control
device Display
SPEED 0 …. ~3300
ABS switch 1
2
3
4
~0
~1100
~2200
~3300
MIKE
Connected
(STOP)
Depends on
button
pressed
~2750
~500 …
~2500
CONF MIC
Not
connected
Connected
NO CONF
CONF

5
Firmware Upgrade
Download the Firmware Upgrade tool with the last version of the relevant Firmware
<DPMFirmwareV0103.exe> (e.g. for Firmware version 01.03) and the <Upgrade.txt> file
(information about how to upgrade the Firmware of the DPM2 family) from
http://www.speech.philips.com/service/ to a dedicated directory on your PC.
To upgrade the Firmware on LFH 9750:
It is strongly advised to follow the correct sequence given below !
1. Push the Trigger Firmware Upgrade switch on the rear of the machine (through the
hole marked with P) by using a small pin whilst simultaneously plugging in the power
supply. To confirm the Upgrade mode the Display is now switched off.
2. Start the <DPMFirmwareV0103.exe> file.
3. Connect the LFH 9750 to the PC by using the USB download cable.
Click “OK”
Simultaneously with above message the LCD on LFH 9750 displays: “Update please
wait”, followed by “Unplug USB cable” to confirm the correct upgrade procedure.
Click “OK”
4. Disconnect the USB cable.
After starting the Test mode by pressing DOWNLOAD and DELETE buttons and JOG Dial
simultaneously the Display indicates the loaded Firmware version, e.g. VER: 01.03

6
MAC Address
After replacement of the DSP-Print (PCB2) the original MAC address of the unit, which
is equal with the Serial number of the machine, has to be set.
Download the MAC Address programming tool <SerialNumber.exe>, the
<FACTORY.bin> file and the <DPMFIRMWAREUPGRADE.EXE> file from
http://www.speech.philips.com/service/ to a dedicated directory on your PC.
To set the MAC Address (after replacement of PCB2):
It is strongly advised to follow the correct sequence given below !
1. Push the Trigger Firmware Upgrade switch on the rear of the machine (through the
hole marked with P) by using a small pin whilst simultaneously plugging in the power
supply. To confirm the Upgrade mode the Display is now switched off.
2. Start the <SerialNumber.exe> file.
3. Connect the LFH 9750 to the PC by using the USB download cable.
Set the PCB to EU (International) or US version (12 hours PM/AM or 24 hours clock).
Type in the Serial number of the machine mentioned on the type level on the bottom plate.
Click “OK”
Click “OK”
4. Disconnect the USB cable.

7
Firmware Upgrade (from Firmware version 2.20 onwards)
Download the last version of Firmware <DPMFirmwareV0220.exe> (e.g. for Firmware
version 02.20) from http://www.speech.philips.com/service/ to a dedicated directory on
your PC.
To upgrade the Firmware on LFH 9750/00:
3. Start the <DPMFirmwareV0220.exe> file.
4. Follow the instructions given by the DPM Firmware Upgrade Wizard.
After starting the Test mode by pressing DL and DEL buttons and JOG Dial
simultaneously the Display indicates the loaded Firmware version, e.g. VER: 02.20
USB (connector) test
The communication between the LFH 9750 and the PC is tested during any Firmware
Upgrade process by connecting the LFH 9750 to the PC.
Firmware fault codes
A number of faults are recognized by the firmware and a fault code is displayed on the
LCD.
Example:
If above information appears on the LCD please notify the mentioned fault code (e.g. fault
code 200) and report it to your Cluster Service Manager for further investigations.
Record/Play back test
Insert a Memory Card.
Create a record via the connected microphone (LFH 0276/10 or LFH 0278/10) and a
conference microphone LFH 0172 (test of the conference microphone socket) as well.
Play back the recorded sound file via the built-in loud speaker and a headphone (test of
the headphone socket) as well.

Circuit Digram PCB 1Circuit Digram PCB 1
8
Circuit Digram PCB 1
Circuit Digram PCB 1
8

Circuit Digram PCB 2
9

PCB 1 - Side 1
10

PCB 1 - Side 2
11

PCB 2 - Side 1
12
PCB 2 - Side 2

Exploded View
13

Mechanical Partslist LFH 9750
POS. DESCRIPTION SERVICE CODE
1UPPER HOUSING ASSY. 5103 109 27090
2LCD ASSY. (incl. Support) 5103 109 27100
3DELETE / DOWNLOAD KEY 5103 104 31430
4KEY / SLIDER UNIT 5103 109 27110
5CONNECTOR FOR PCB 2 8203 312 16610
6KEY SWITCH 2422 128 02778
7SCREW (for PCB 1) 1.5 x 11 5103 100 41470
8SUPPORT FOR PCB 1 5322 462 41204
9SCREW (for bottom plate) 2.9 x 16 4822 502 30276
11 FOOT 5322 462 42217
12 SCREW (for LCD support) 1.5 x 11 5103 100 41620
13 LOUD SPEAKER, 25 OHM 4822 240 30126
14 SWITCH JOGDIAL ASSY. 5103 109 27120
15 MOUNTING SPRING FOR LS 5322 492 71716
16 PCB 2 ASSY. (Printed Circuit Board) 5103 109 *)
17 POWER SUPPLY SOCKET 5322 267 31958
18 FOOTSWITCH / HEADPHONE SOCKET 5322 267 31957
19 MICROPHONE SOCKET 5322 267 41229
21 CONF. REC. MICROPHONE SOCKET 8203 312 16570
22 USB SOCKET 8203 312 16560
23 COVER PLATE 5103 104 31490
24 BUTTON (LS, ABS) 5103 104 31560
25 ABS SWITCH 8203 312 13770
26 LS SWITCH 8203 312 16810
USB DOWNLOAD CABLE 5103 108 77700
CARD CONNECTOR 8203 312 16390
*) Please contact your local Philips Speech Processing Service & Support Department for
assistance.
15
14

Electrical Partslist LFH 9750
POS. DESCRIPTION SERVICE CODE
BT 1 RECH.LITH.BATT.VL23301VC 50MAH 5103 108 77780
C 1 ELCO 470MU/16V 4822 124 80791
C 2 ELCO 100MU/25V 4822 124 40207
C 5 CAPACITOR 1MU (SMD) 4822 126 14043
C 18 ELCO 100MU/25V 4822 124 40207
C 19 ELCO 33MU/50V 4822 124 40252
C 20 ELCO 10MU/50V 4822 124 40248
C 48 ELCO 470MU/16V 4822 124 80791
D 1 SMD-PROTEC-DIODE PSR05 8203 312 17120
D 2 SMD-DIODE BAT 54C (L43) 4822 130 82594
D 3 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
F 1 FUSE, 500 mA/SLOW $ 4822 071 55001
IC 1 SMD-I.C. MC4558CD R2 5322 209 62793
IC 2 SMD-I.C. LMC 6482 IM 8203 312 16580
IC 3 SMD-I.C. MC1458D 5322 209 90555
IC 4 I.C. TCA 0372 DP1 4822 209 62059
IC 5 SMD-I.C. HCF4066BM1-013TR 5322 209 90554
IC 6 SMD-I.C. PCA9555D 9352 695 67118
LS LOUD SPEAKER 4822 240 30126
R 14 VOLUME POT. 50K LOG 5322 100 20862
R 15 TONE POT. 5K LIN 5322 105 11154
R 25 SPEED POT. 5K LIN 5322 105 11154
R 37 RESISTOR $ 15E 4822 052 10159
15

Electrical Partslist LFH 9750
POS. DESCRIPTION SERVICE CODE
SK 1 LS SWITCH 8203 312 16810
SK 2 ABS SWITCH 8203 312 13770
SK 3 KEY SWITCH 2422 128 02778
SK 4 KEY SWITCH 2422 128 02778
SK 5 KEY SWITCH 2422 128 02778
SK 6 KEY SWITCH 2422 128 02778
SK 7 KEY SWITCH 2422 128 02778
SK 8 FIRMWARE UPGRADE SWITCH 5322 276 138 81
SWITCH JOGDIAL ASSY. 5103 109 27120
SO 1 POWER SUPPLY SOCKET 5322 267 31958
SO 2 HEADPHONE SOCKET 5322 267 31957
SO 3 FOOTSWITCH SOCKET 5322 267 31957
SO 4 USB SOCKET 8203 312 16560
SO 5 MICROPHONE SOCKET 5322 267 41229
SO 6 CONF. REC. MICROPHONE SOCKET 8203 312 16570
TS 1 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 2 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 3 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 4 SMD-TRANSISTOR BSH205 9340 547 21215
TS 5 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 6 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 7 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 8 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 9 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 10 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 11 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 12 SMD-TRANSISTOR BC 847C (1Gp) 5322 130 42755
TS 13 SMD-TRANSISTOR BC 857B (3Fp) 4822 130 60373
TS 14 SMD-TRANSISTOR BSH205 9340 547 21215
16